Appendix C

National Type Evaluation Technical Committee

Weighing Sector

September 6 - 9, 2007 -- Sacramento, California

**Meeting Summary**

Agenda Items

[Railway Track Scale Items C2](#railway-track-scale-items)

[1. CLC Type Evaluation Tests on Railway Track/Vehicle Scales --
Technical Policy (Carryover)
C2](#clc-type-evaluation-tests-on-railway-trackvehicle-scales-technical-policy-carryover)

[2. In-Motion Railway Track Scale Performance and Permanence - Technical
Policy (Carryover)
C4](#in-motion-railway-track-scale-performance-and-permanence---technical-policy-carryover)

[3. Vehicle and Railway Track Scale NTEP Capacity -- Technical Policy
(New)
C6](#vehicle-and-railway-track-scale-ntep-capacity-technical-policy-new)

[Carryover Items C7](#carryover-items)

[4. Recommended Changes to Publication 14 Based on Actions at the 2007
NCWM Annual Meeting
C7](#recommended-changes-to-publication-14-based-on-actions-at-the-2007-ncwm-annual-meeting)

[4.(a) G-S.2. Facilitation of Fraud C7](#a-g-s.2.-facilitation-of-fraud)

[4.(b) G-S.5.6.1. Indicated and Recorded Representation of Units --
Appropriate Abbreviations and Table 1. Recorded Representation of SI
Units on Equipment with Limited Character Sets
C7](#b-g-s.5.6.1.-indicated-and-recorded-representation-of-units-appropriate-abbreviations-and-table-1.-recorded-representation-of-si-units-on-equipment-with-limited-character-sets)

[4.(c) G-S.8.1. Multiple Weighing or Measuring Elements that Share a
Common Provision for Sealing
C8](#c-g-s.8.1.-multiple-weighing-or-measuring-elements-that-share-a-common-provision-for-sealing)

[4.(d) S.1.1.(c) Zero Indication (Marking Requirements)
C8](#d-s.1.1.c-zero-indication-marking-requirements)

[4.(e) Bench/Counter Scale Shift Test and Definitions
C9](#e-benchcounter-scale-shift-test-and-definitions)

[5. Publication 14 Force Transducer (Load Cell) Family and Selection
Criteria -- Report of the Load Cell Work Group (WG)
C10](#__RefHeading___Toc189113360)

[6. Report of the Tare Work Group C10](#report-of-the-tare-work-group)

[6.(a) Add New and Amended Tare Definitions and Tare Requirements
C10](#__RefHeading___Toc189113362)

[6.(b) Amend Scales Code and AWS Code Paragraph S.1.1.1. Digital
Indicating Elements C11](#__RefHeading___Toc189113363)

[6.(c) Amend Scales Code Paragraph S.1.2.1. Weight Units
C11](#__RefHeading___Toc189113364)

[6.(d) Amend Scales Code Tolerance Paragraph T.N.2.1
C12](#__RefHeading___Toc189113365)

[7. Minimum Size of Weight and Units Indications
C13](#minimum-size-of-weight-and-units-indications)

[New Items C14](#new-items)

[8. Level Indicating Means -- Out-of-Level Test
C14](#level-indicating-means-out-of-level-test)

[9. Wireless Communication Information on the Certificate of Conformance
(CC)
C15](#wireless-communication-information-on-the-certificate-of-conformance-cc)

[10. Hopper Scale Design Parameters -- Technical Policy
C16](#hopper-scale-design-parameters-technical-policy)

[11. Method of Sealing -- Set-up and Verification of
Calibration/Configuration Access
C18](#method-of-sealing-set-up-and-verification-of-calibrationconfiguration-access)

[Next Sector Meeting C20](#next-sector-meeting)

[Appendices C21](#__RefHeading___Toc189113373)

[Appendix A -- Recommendations for Amendments to Publication 14
C23](#appendix-a-recommendations-for-amendments-to-publication-14)

[Appendix B -- Meeting Attendees C29](#appendix-b-meeting-attendees)

[Appendix C -- Attachments C31](#appendix-c-attachments)

[Attachment for Agenda Item 5 C31](#attachment-for-agenda-item-5)

[Attachment for Agenda Item 6 C36](#attachment-for-agenda-item-6)

+-----+---------------------------+-----+----------------------------+
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+-----+---------------------------+-----+----------------------------+
| AWS | Automatic Weighing        | NT  | National Type Evaluation   |
|     | Systems                   | ETC | Technical Committee        |
+-----+---------------------------+-----+----------------------------+
| CC  | NTEP Certificate of       | O   | International Organization |
|     | Conformance               | IML | of Legal Metrology         |
+-----+---------------------------+-----+----------------------------+
| CIM | Coupled-in-Motion         | S&T | NCWM Specifications and    |
|     | (Railway Track Scales)    |     | Tolerances Committee       |
+-----+---------------------------+-----+----------------------------+
| CLC | Concentrated Load         | S   | Southern Weights and       |
|     | Capacity                  | WMA | Measures Association       |
+-----+---------------------------+-----+----------------------------+
| EPO | Examination Procedure     | W/  | Weighing/Load-receiving    |
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+-----+---------------------------+-----+----------------------------+
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+-----+---------------------------+-----+----------------------------+
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+-----+---------------------------+-----+----------------------------+
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| IST | Standards and Technology  | WMA | Measures Association       |
+-----+---------------------------+-----+----------------------------+
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+-----+---------------------------+-----+----------------------------+
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+-----+---------------------------+-----+----------------------------+

# Railway Track Scale Items

## 1. CLC Type Evaluation Tests on Railway Track/Vehicle Scales -- Technical Policy (Carryover)

**Source:** 2006 NTETC Weighing Sector Agenda Item 13

**Background:** Please see the 2006 NTETC Weighing Sector Meeting
Summary Agenda Item 13 for complete background information on this item.

During the 2006 NTETC Weighing Sector meeting, the NTEP Director,
Stephen Patoray, noted that the proposed amendment to Publication 14
technical policies in Section 8.e. applies only to devices submitted for
evaluation and could not be applied to previous evaluations without
additional testing as it is currently worded. The Sector discussed the
impact of the proposal to accept a vehicle scale application on an
[existing]{.underline} NTEP CC for railway track scales.

The NTEP director suggested, and the Sector agreed, that Publication 14
Section E. Modification of Type could be amended to update existing
railway track scale CCs to include vehicle-weighing applications without
additional testing if:

1.  the section test on the railway track scale was performed with
    100 000 lb of certified test weights or weight carts;

2.  strain load tests were conducted during the original railway track
    scale evaluation;

3.  the design of the load-receiving element (LRE) is no wider than
    12 ft; and

4.  the design of the weighing element is "beam and girder" design.
    (This item would not be applicable to other scale designs such as
    composite designs where the strength of the deck is dependent on
    several individual elements being combined in the design of the
    scale deck.)

Above items (1-3) were added to the 2007 Edition of Publication 14 as
notes to technical policy paragraph 8.2.e.

To address Item 4, the Sector also recommended specific language for
Publication 14 Section E. Modifications be developed as a carryover item
based on the above discussion. Stephen Patoray, Todd Lucas, and Steve
Beitzel agreed to review Section E and develop language to be considered
by the Sector during its 2007 Annual Meeting.

For the 2007 Sector Meeting, the NIST technical advisor developed
language for Publication 14 Section E. Modifications for a new
paragraph 10 titled "Adding a vehicle scale feature or option to an
active railway track scale CC" for review by the Sector. The Sector was
asked to review and comment on the proposed new paragraph to determine
if it was sufficiently developed to recommend that it be added to
Publication 14.

During the development of this agenda item, Stephen Patoray and Steven
Cook noted that several existing railway track and combination
vehicle/railway track scales have the dump-through option listed on the
CC without additional evaluation. Publication 14 Technical Policy E.
Modification of Type paragraph 7 does not include railway track and
combination vehicle/railway track scales in the language. Additionally,
paragraphs 8 and 9 do not specify what kind of evaluations are to be
conducted. The Sector was asked to review the proposed amendments to
paragraphs 7, 8, and 9 developed by the technical advisor and:

1.  agree with the proposal to include "railway track, or a combination
    vehicle/railway track scales" to the existing language;

2.  recommend that either an initial or complete evaluation be conducted
    on the scales with composite construction for the "dump-through"
    option;

3.  recommend that either an initial or complete evaluation be conducted
    on the scales with composite construction for the "rotary dump"
    feature/option; and

4.  provide any additional comments and recommendations proposed by the
    technical advisor.

**Discussion:** The Sector reviewed the proposed language to amend
Publication 14 Technical Policy Section E paragraphs 7, 8, and 9, and
the new paragraph 10. The sector provided the technical advisor with
additional suggestions to amend the proposed language in paragraph 10 to
include a limitation that the LRE be no wider than 12 ft to be
consistent with current technical policy in section 8.1.c. "Additional
criteria for vehicle scales, railway track scales, combination
vehicle/railway track scales, and other platform scales over 30 000 lb
and up to and including 200 000 lb," and corresponding footnote 3 for
scales with widths greater than 12 ft, which requires additional testing
with procedures "addressed by NTEP management and the NTEP laboratories
on a case-by-case basis."

The Sector also discussed the proposed revisions to Section E
Modification of Type paragraphs 7 through 9 and provided input to the
four recommendations.

**Conclusion:** The Sector agreed to recommend that Publication 14
Section E Modification of Type paragraphs 7 through 9 be amended and
paragraph 10 be added to:

> 1\. provide NTEP laboratories and applicants with guidelines to add a
> vehicle scale feature or option to an active railway track scale CC;
>
> 2\. clarify that combination vehicle/railway track scales are included
> in paragraphs addressing the "dump-through" option;
>
> 3\. clarify that a full evaluation is required to add a "dump-through"
> option for scales with other than the "beam and girder" design; and
>
> 4\. clarify that a full evaluation is required to add a "rotary dump"
> option for all railway track scales with an active CC.

A copy of the recommended changes to Publication 14 Section E
Modification of Type is in Appendix A -- Recommendations to
Publication 14 -- Agenda Item 1.

## 2. In-Motion Railway Track Scale Performance and Permanence - Technical Policy (Carryover)

**Source:** 2007 NTETC Weighing Sector Agenda Item 15

**Background:** See 2006 Weighing Sector Agenda Item 15 (a) for
additional background information on an NTEP appeal to the permanence
testing requirements for evaluation of a separable in-motion indicator
interfaced to railway track scale with an active CC. The Sector was
unable to come to a consensus on whether to agree with the NTEP
Committee or propose any changes to the permanence test requirements at
its 2006 meeting. The Sector chairman asked for a vote to see if the
Sector agrees with the NTEP Committee decision to waive permanence
testing for indicators and controllers used in coupled-in-motion (CIM)
railway track scale type evaluations.

-   8 Sector members voted *to* *support* the NTEP Committee decision.

-   9 Sector members voted *not to support* the NTEP Committee decision.

-   1 Sector member *abstained* from voting.

The Sector made no recommendation on this item since Don Onwiler
reported that the NTEP Committee would reconsider its decision during
their October 2006 meeting.

During the 2006 Fall meeting of the NCWM Board of Directors, the NTEP
Committee (a subset of the board members) offered the Sector several
options in its response to the 2006 Sector discussion on this item. A
copy of the NTEP Committee's response was provided to 2007 NTEP
Participating Laboratory meeting and to the full NTETC Weighing Sector.
The NTEP Committee requested the Weighing Sector revisit this subject to
review and discuss NCWM Publication 14, Digital Electronic Scales (DES)
Section 68, Performance and Permanence Tests for Railway Track Scales
Used to Weigh In-Motion, including the opening paragraph that states:

> "Performance tests are conducted to determine compliance with the
> tolerances. The tests described here apply primarily to the indicating
> element. It is assumed that the weighing/load-receiving element used
> during the test has already been examined and been found to comply
> with applicable requirements. If the design and performance of the
> weighing/load-receiving element is to be determined during the same
> test, the applicable requirements for Railway Scales Used to Weigh
> Statically must also be referenced."

The NTEP Committee also suggested the Sector come to one of the
following conclusions, or develop an alternate proposal:

1.  The Sector may agree with the implication of this opening paragraph
    that a CIM controller may be used in conjunction with any
    weighing/load-receiving element that is NTEP certified for static
    weighing. If so, the NTEP Committee recommends [Section 68 be
    modified to eliminate reference to permanence testing]{.underline}.

2.  The Sector may determine that NTEP certification of a
    weighing/load-receiving element as a static scale is not sufficient
    for its use in commerce in a CIM weighing system. If so, the NTEP
    Committee recommends [a new checklist be developed explicitly for
    the performance and permanence testing of a CIM
    weighing/load-receiving element and another checklist be developed
    explicitly for the performance evaluation of the CIM
    controller.]{.underline}

3.  The Sector may [determine that the NTEP certification for CIM
    weighing should be on an entire system, limiting use of the CIM
    controller only in connection with the weighing/load-receiving
    element(s) with which it underwent type approval]{.underline}. If
    so, the NTEP Committee recommends this clarification be provided.
    Existing certificates would be amended providing this limitation of
    use and additional testing may be required to correctly identify and
    certify these system requirements.

At the May 2007 NTEP Laboratory meeting, the NTEP "field" labs met
separately and reviewed the NTEP Committee's recommendation to the
Weighing Sector. The "field" labs agreed with the NTEP Committee's first
suggestion and provided a recommendation to modify Publication 14 DES,
Section 68. The proposal makes Section 68 a checklist for the evaluation
of a CIM controller. It recognizes that any weighing/load-receiving
element with an NTEP certificate as a static railway track scale may be
used in conjunction with the controller. The permanence testing of the
weighing/load-receiving element will be verified when the checklist in
Section 69 is completed. The "field" labs forwarded their recommendation
to the Sector and also recommended that a definition for an "in-motion
controller" be developed.

## 

**Discussion:** The first part of the discussion was on the possible
directions/options suggested by the NTEP Committee.

Steve Beitzel, System Associates, stated that in-motion devices should
be NTEP evaluated and certified as a system. However, he does not agree
with suggested option 3 from the NTEP Committee. Under option 3 nearly
all installations would need to be evaluated since it requires the
system be limited to the metrological elements approved during the
evaluation and would not permit the mixing and matching of compatible
elements unless they were listed on the certificate for the system.
Darrell Flocken, Mettler Toledo, agreed that this option does not give
the applicant flexibility to use compatible elements and suggested the
Sector consider NTEP Committee options 1 and 2 or develop an alternative
4^th^ option. Stephen Patoray, NTEP director, stated that a CC for a
system is specific for the components or elements that were evaluated as
part of the system. He asked what the purpose of the NTEP evaluation of
a complete system is if it is determined that a previously certified
static W/LRE is allowed to be substituted with other certified static
W/LREs.

The Sector discussed option 2 in great detail. Following are the salient
points of the discussion regarding tests/verifications in the controller
and W/LRE checklists:

1.  An in-motion system can be very long, and the controller has to
    resolve varying parameters (e.g., speed, direction, etc). The
    permanence test provides confidence the system (installation) can
    perform over a period of time.

2.  Does the permanence test apply to the in-motion controller, W/LRE,
    and the entire system?

3.  The permanence test should apply to just the controller since it
    must be able to compensate for both metrological and
    non-metrological signals from the W/LRE and other inputs from the
    installation in order for the controller to determine the proper
    time to establish a weight.

4.  Track settling issues:

```{=html}
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```
a.  Parts of the track may have settled or loosened causing unwanted
    signals that are received and compensated for by the in‑motion
    controller;

b.  Could NTEP evaluate 20 -- 30 days after installation? Too costly
    since the railroads would have to pay for an extra
    "placed-in-service" test in addition to the subsequent test or tests
    performed by NTEP (GIPSA);

c.  NTEP should consider verifying the approach foundation is installed
    according to the manufacturer's (and/or railroad's) recommendations;

d.  Performance problems cannot be resolved by recalibration; problems
    are typically caused by poor/inappropriate installation;

e.  Installation problems where the open track interfaces with the track
    supported by the concrete foundations are also a source of
    performance problems;

f.  The in-motion controller checklist would have to include testing to
    verify it can compensate or filter out unwanted signals. Can
    unwanted signals be simulated?

A straw poll of the Sector indicated the majority of the Sector agreed
with option 1 of the NTEP Committee, though WMD representatives
supported option 3 since it is a more complete evaluation. As a result
of the straw poll, the Sector proceeded to discuss the NTEP "field"
labs' proposal on the agenda.

**Conclusion:** The Sector agreed with the proposal from the NTEP
"field" labs to eliminate the permanence test requirements in
Publication 14 Section 68 and to limit the evaluation to "in-motion"
controllers since the W/LRE is required to be evaluated as a static
railway track scale in Publication 14 Section 69. Performance and
Permanence Tests for Railway Track Scales Used to Weigh Statically. The
Sector agreed to change the term "coupled in-motion" systems to
"in-motion" systems since the type evaluation requirements apply to both
coupled and uncoupled in-motion railway track scale controllers.

The Sector also asked the NIST technical advisor to develop a
Publication 14 definition of the term "in-motion controller." The NIST
technical advisor will investigate the possibility on making the
definition broad enough to include controllers for other "in-motion"
weighing devices such as dynamic monorail scales. The proposed language
will be voted on by the Sector in a letter ballot prior to the 2008 NCWM
Interim Meeting.

The Sector suggested minor changes to the NTEP "field" labs' proposed
amendment to Section 68 as shown in Appendix A -- Recommendations to
Publication 14 -- Agenda Item 2 and recommended the changes be
incorporated into Publication 14.

## 3. Vehicle and Railway Track Scale NTEP Capacity -- Technical Policy (New)

**Source:** Don Onwiler, Nebraska

**Background:** This item questions the necessity of basing the
NTEP-certified capacity limits of vehicle and railway track scales on
strain-load testing.

-   In Nebraska's experience, performance problems are identified in
    type evaluations during section tests. By the time a strain-load
    test is conducted, problems related to performance have been
    identified and corrected. (Note: The shift test is usually conducted
    first because this test frequently reveals accuracy problems.)

-   In section testing on vehicle scales, the evaluator is testing to at
    least 90 % of CLC. This provides a better test of the upper range
    capabilities of a scale than strain-load testing which distributes
    the load to multiple sections of the scale.

-   For railway track scales, the minimum strain load is 200 000 lb,
    regardless of the desired nominal capacity. If a manufacturer
    requests to amend a CC for a higher capacity, Publication 14
    Technical Policy 8.2.a. (for scales with a capacity greater than
    200 000 lb) only obligates the evaluator to repeat the tests
    completed in the original evaluation since there are no differences
    in the required load used for the strain-load test.

-   Handbook 44 provides formulas for maximum nominal capacity of these
    devices based on CLC and section capacities.

Strain-load tests may still have value in demonstrating the ability of
the scale sections to interact with each other and sum together to
provide accurate weighments when loads are distributed on the platform.

Nebraska recommends the following:

-   Modify the Publication 14 DES Technical Policy for Scales to allow a
    maximum capacity for vehicle and railway track scales based on the
    formulas in paragraphs S.6.1. and S.6.4. in Handbook 44, and

-   Modify the evaluation checklist for vehicle scales to provide
    guidance for minimum strain loads other than the traditional nominal
    capacity provided by the manufacturer or submitter of the device.
    For example, NTEP could perform a stain-load test to 160 000 lb or
    80 % of the calculated maximum nominal capacity of the device under
    evaluation, whichever is less.

The Sector agenda included additional background from HB 44 Scales Code
marking requirements, the 1994 and 2001 S&T Committee Final Reports, and
the 2000 NTETC Weighing Sector Final Report discussing the original
justification and history on the development of CLC and section capacity
and the ranges covered on the CC for scales with a capacity greater than
200 000 lb.

**Conclusion/Discussion:** The Sector reviewed the background
information in the agenda and agreed there is no value in conducting an
additional evaluation to increase the section and nominal capacity of a
railway track scale CC since there is no difference in the tests to be
conducted on the scale with increased capacities. The Sector recommended
the NTEP director review the application under question to verify the
request to amend the CC is consistent with existing CCs with similar
parameters.

The Sector also agreed there is a loophole in the existing policies for
RR track scales with a capacity greater than 200 000 lb. The SMA and
AREMA Committee 34 volunteered to work on the testing requirements for
vehicle and railway track scales with capacities greater than 200 000 lb
and provide to the NTEP director and NIST technical advisor an update on
developing a proposal for consideration by the Weighing Sector prior to
the 2008 NCWM Interim Meeting.

# Carryover Items

## 4. Recommended Changes to Publication 14 Based on Actions at the 2007 NCWM Annual Meeting

The NIST technical advisor, Steve Cook, provided the Sector with
specific recommendations for incorporating test procedures and checklist
language based upon actions of the 2007 Annual Meeting of the
92^nd^ NCWM. The Sector was asked to briefly discuss each item and, if
appropriate, provide general input on the technical aspects of the
issues.

### 4.(a) G-S.2. Facilitation of Fraud

**Background:** See the Annual Report of the 2007 NCWM S&T Committee
Agenda Item 310‑1 for additional background information regarding the
discussions to amend HB 44 General Code paragraph G‑S.2. During its 2007
Annual Meeting, the NCWM agreed to amend HB 44 1.10. General Code G‑S.2.
in the 2008 Edition of HB 44 to clarify that the prohibition against
facilitating fraud applies to electronic manipulation or alteration of
electronically programmed and coded components of weighing and measuring
devices.

**Conclusion:** The Sector agreed with the NIST technical advisor that
no changes to Publication 14 are required to reflect the amended
language in HB 44 paragraph G‑S.2.

### 4.(b) G-S.5.6.1. Indicated and Recorded Representation of Units -- Appropriate Abbreviations and Table 1. Recorded Representation of SI Units on Equipment with Limited Character Sets

**Background:** See the Annual Report of the 2007 NCWM S&T Committee
Agenda Item 310‑2 for additional background information regarding
discussions to amend the 2008 Edition of Handbook 44 General Code
paragraph G‑S.5.6.1. and Table 1. to require abbreviations for SI units
as specified in NIST Special Publication 811 "Guide for the Use of
International System of Units (SI)" and HB 44 Appendix C -- General
Tables of Units of Measurement for both indications and recorded
representations on new technology. The amendment would also continue to
permit exceptions to those guidelines for older equipment with limited
character sets.

**Discussion:** The Sector reviewed the changes to HB 44, Publication 14
DES Section 76, and HB 44 Appendix C page C-4 and noted that
Publication 14 may be in conflict with HB 44 since Appendix C (page C-4)
lists the abbreviation for "grain" (gr) and Publication 14 DES
Section 76 List of Acceptable Abbreviations/Symbols lists different
abbreviations for the word grain as "GRN," "grn," or "GN."

**Conclusion:** The Sector reviewed HB 44 Appendix C -- General Tables
of Units of Measurement and agreed the exceptions in Publication 14
Section 76 are appropriate since they are widely used in the marketplace
and cannot be confused with other abbreviations in HB 44.

The Sector also agreed to recommend the changes to DES Section 12 and 76
as proposed by the NIST technical advisor as shown in Appendix A --
Recommendations to Publication 14 -- Agenda Item 4.(b).

### 4.(c) G-S.8.1. Multiple Weighing or Measuring Elements that Share a Common Provision for Sealing

**Background:** See the Final Report of the 2007 NCWM S&T Committee
Agenda Item 310‑3 for additional background information to add
paragraph G‑S.8.1. to the General Code of the 2008 Edition of
Handbook 44. General Code Paragraph G‑S.8.1 regarding the identification
of adjustments to individual weighing or measuring elements is required
when systems have multiple weighing or measuring elements with a single
provision for sealing.

**Conclusion:** The Sector agreed to recommend the addition of new
language to DES‑10 in Pub 14 as proposed by the NIST technical advisor,
which is shown in Appendix C (Agenda Item 4.(c).

### 4.(d) S.1.1.(c) Zero Indication (Marking Requirements)

**Source:** 2004 Weighing Sector Agenda Item 4 -- S.1.1.(c) Zero
Indication (Marking Requirements).

**Background:** See the Annual Report of the 2007 NCWM S&T Committee
Agenda Item 320‑1 for additional background information regarding the
justifications for and against the proposed language to amend Scales
Code paragraph S.1.1.(c) Zero Indication (Marking Requirements).

**Discussion/Conclusion:** The Sector reviewed the proposed amendments
to Publication 14 to verify that automatic means are provided to inhibit
a weighing operation or to return to a continuous digital indication
when the scale is in an out-of-balance condition according to the
requirement in paragraph S.1.1.(c) Zero Indication. The NIST technical
advisor used the requirements and procedures from Measurement Canada's
laboratory and field manuals to develop the proposed changes to
Publication 14.

The Sector agreed the proposed amendments to Publication 14 deleted the
references to requiring additional markings when a scale is capable of
displaying other than a digital zero indication when the scale is in a
zero balance condition. The Sector also discussed the proposed terms and
definitions and agreed that the definitions for screen saver and sleep
modes could be combined since the only difference between the two
features was what was or was not displayed. The Sector also agreed to
modify the proposed definition for the power save mode to clarify that
it requires operator intervention in order to bring the scale back to
normal operation.

The Sector noted the proposed amendment to the checklist did not
identify all the ways a scales could automatically enter or exit these
modes. Therefore, the Sector developed the following table to summarize
when a scale can automatically enter the screen saver and power save
modes and what was required by either the operator or the scale to exit
the screen saver and power save modes to assure automatic means are
provided to inhibit a weighing operation or return to a continuous
digital indication when the scale is in an out-of-balance condition.

The Sector also recommended that the NIST technical advisor revise the
proposed amendment to Publication 14 to address the conditions under
which a scale goes into and comes out of one of these modes. The revised
proposal will be balloted to the Sector and the final recommendation
will be presented to the NTEP Committee prior to their meeting during
the January 2008 NCWM Interim Meeting.

[]{.mark}

+--------+---------+----------+--------------+-------------------------+
| **S    |         |          |              |                         |
| ummary |         |          |              |                         |
| of     |         |          |              |                         |
| Screen |         |          |              |                         |
| Saver  |         |          |              |                         |
| /Sleep |         |          |              |                         |
| and    |         |          |              |                         |
| Power  |         |          |              |                         |
| Save   |         |          |              |                         |
| Mode   |         |          |              |                         |
| of     |         |          |              |                         |
| Opera  |         |          |              |                         |
| tion** |         |          |              |                         |
+--------+---------+----------+--------------+-------------------------+
| **     | **Di    | **A      | **Exited     | **Verified by**         |
| Mode** | splay** | ctivated | by**         |                         |
|        |         | by**     |              |                         |
+--------+---------+----------+--------------+-------------------------+
| Screen | i.e.,   | Period   | Change in    | ***Accurate weights are |
| Saver  | Sc      | of time  | weight,      | displayed*** when:      |
| /Sleep | rolling | at gross | i.e., no     |                         |
|        | or      | load     | longer at    | \- weight is added to   |
|        | other   | center   | gross load   | the LRE                 |
|        | non     | of zero  | zero         |                         |
|        | metro   |          |              | \- weight is removed    |
|        | logical |          |              | from the LRE, and       |
|        | infor   |          |              |                         |
|        | mation, |          |              | \- the LRE is disturbed |
|        | blank,  |          |              | by hand                 |
|        | or      |          |              |                         |
|        | annun   |          |              |                         |
|        | ciator, |          |              |                         |
+--------+---------+----------+--------------+-------------------------+
|        |         | Period   | Deliberate   | ***No weights are       |
|        |         | of time  | operator     | displayed*** when:      |
|        |         | with a   | action       |                         |
|        |         | non      | (remove load | \- weight is added to   |
|        |         | changing | off scale    | the LRE                 |
|        |         | load on  | and rezero   |                         |
|        |         | the      | if           | \- weight is removed    |
|        |         | scale    | necessary)   | from the LRE, and       |
|        |         |          |              |                         |
|        |         |          |              | \- the LRE is disturbed |
|        |         |          |              | by hand                 |
+--------+---------+----------+--------------+-------------------------+
| Power  | Of      | Period   | Pressing a   | ***Accurate weights are |
| save   | f/Blank | of time  | button, or   | displayed***            |
|        |         | with no  | other        |                         |
|        |         | activity | deliberate   | according to            |
|        |         | on the   | operator     | Publication 14          |
|        |         | LRE      | action       | Section 53. Values      |
|        |         | (loaded  | (e.g., turn  | Displayed, Temperature  |
|        |         | or       | on the       | Conditions (Warm-up)    |
|        |         | u        | scale, etc.) | Test Procedure 1 or 2   |
|        |         | nloaded) |              |                         |
+--------+---------+----------+--------------+-------------------------+

### 4.(e) Bench/Counter Scale Shift Test and Definitions

**Source:** 2006 NTETC Weighing Sector Item 3 (Carryover Item)

**Background:** See the 2006 Summary of the Weighing Sector Agenda
Item 3 and the Annual Report of the 2007 NCWM S&T Committee Agenda
Item 320‑6 for additional background information regarding proposed
language to amend Scales Code shift test definitions and procedures.

At the 2007 NCWM Annual Meeting, the S&T Committee believed there was
sufficient support for this item with the correction of the references
to Figures 1 and 2 in proposed paragraphs. Consequently, the Committee
agreed to present the item for a vote and the item was adopted.

These adopted changes apply to all types of platform scales with fewer
than three sections except for livestock, vehicle, and railway track
scales, vehicle on-board weighing systems, and other scales listed as
exceptions in Scales Code paragraph N.3.8. These changes include:

1.  deleting paragraph N.1.3.1. Bench and Counter Scales and renumbering
    subsequent paragraphs;

2.  changing the test load for the shift test from 50 % to a range of
    30 % - 35 % of the scale capacity;

3.  changing the shift test pattern for bench and counter scales to be
    the same as the current test pattern for the other scales listed in
    paragraph N.3.7. (formerly N.3.8.); and

4.  providing guidance to the application of standards in a manner that
    is safe for the weights and measures inspector and will not
    over‑concentrate the test load on the load-receiving element.

The major revision to the shift test procedures were made to shift test
paragraph N.3.8 which was been renumbered to N.3.7.

**Discussion/Conclusion:** The Sector reviewed the background
information and discussed the revisions to Publication 14 developed by
the NIST technical advisor to amend shift test loads from one-half scale
capacity to a range of 30 % - 35 % of the scale capacity, including a
recommendation to "editorially" amend the references "bench and counter
scales" to "platform scales with four or less load supports."

The Sector agreed with the proposed editorial changes throughout the
Digital Electronic Scales checklist, changes to Section 31.
Multi-Interval Scales and Sections 63 and 64 as shown in Appendix A --
Recommendations to Publication 14 -- Agenda Item 4(e) and recommends
that they be incorporated into Publication 14.

## 5. Publication 14 Force Transducer (Load Cell) Family and Selection Criteria -- Report of the Load Cell Work Group (WG)

Background: During its 2006 Annual Meeting, the Sector agreed with the
suggestion for the NTEP Director to forward the proposal to change the
Publication 14 Force Transducer (Load Cell) Family and Selection
Criteria to holders of NTEP CCs for review and comment by
December 1, 2006.

Discussion/Conclusion: The NTEP Director provided the Sector with an
update to the status of this item. He reported that he had not received
any objections or alternate recommendations on the proposed OIML
R 60-based selection criteria (see Appendix C -- Attachment to Agenda
Item 5 for a copy of the OIML R 60-based load cell selection criteria)
and that NTEP will soon receive load cell applications requesting NTEP
CCs based on the evaluation of test data from international government
laboratories certified to issue test data under the Mutual Acceptance
Arrangement (MAA). Additionally, the Publication 14 language on the
"selection of load cells" was not identified as an additional national
requirement during the "Committee on Participation Review" process since
the language in R 60 was developed by the United States; therefore, the
load cells submitted for evaluation by the international laboratories
will be selected using selection criteria in OIML R 60.

The Sector discussed options for establishing different load cell
selection criteria for U.S. and international manufacturers
(Publication 14--based criteria for U.S. manufacturers and OIML
R 60-based criteria for international manufacturers). However, it was
pointed out that this proposal would not be compatible with an existing
load cell CC when there is a request to amend the CC. There was also a
suggestion for a five-year "phase-in period" after which time existing
CCs could no longer be updated using the 2007 Publication 14-based
criteria.

Since there were only two load cell manufacturers at the Sector meeting,
Darrell Flocken and Stephen Langford stated they would bring this issue
before the SMA technical committee during their November 2007 meeting to
discuss possible recommendations. Additionally, they will provide the
NTEP director and NTEP Committee a report of the discussion and possible
recommendation prior to the January 2008 NCWM Interim Meeting.

## 6. Report of the Tare Work Group

Source: NTEP Participating Laboratories (Carryover Item):

**Background:** See the 2006 NTETC Weighing Sector Meeting Summary
Agenda Item 5, Tare on Multiple Range Scales, for additional background
information on the earlier Sector discussions and WG developing items
and recommendations.

During its 2006 Annual Meeting, the Sector further recommended the NIST
technical advisor submit the Tare Work Group recommendations to the SWMA
S&T Committee. These items were considered by the 2006 NCWM S&T
Committee. Following is a brief recap of the recommendations and actions
by the NCWM. Note there is additional background information available
in the 2007 Final Report of the 92^nd^ NCWM S&T Committee.

[]{#__RefHeading___Toc189113362 .anchor}**6.(a) Add New and Amended Tare
Definitions and Tare Requirements**

**2006 Sector Recommendation:** Add new and amended definitions to
facilitate a uniform understanding of the terms already used in
Handbook 44 (e.g., "tare mechanism," "tare," "net," etc.) in Handbook 44
Appendix D -- Definitions.

**NCWM Recommendation/Action:** This item became 2007 NCWM S&T Committee
Agenda Item 320‑9 and was given "informational" status. The S&T
Committee agreed that lengthy discussions on all of the tare proposals
demonstrate that, although it is necessary to address tare, the matter
is too complex to move forward without a more thorough review of all
related proposals by the Weighing Sector and jurisdictions.
Consequently, the Committee recommended this proposal and other related
proposals intended to address tare features remain as Information Items
for further review and development. The Committee also agreed that all
tare-related items, when ready, should be presented for voting as a
block.

**Discussion:** The NIST technical advisor has incorporated the changes
to proposed definition of "tare mechanism" as recommended by the S&T
Committee and updated the Tare Work Group Handbook 44 "Tare"
recommendations based on its August 7, 2007, conference call. The Sector
was asked to review the Handbook 44 "tare" recommendations and provide
the Tare Work Group and the S&T Committee any comment or suggestions
(see Appendix C -- Attachment to Agenda Item 6 for a copy of the Tare
Work Group recommendations).

**Conclusion:** The Tare WG has completed its work. The Sector agrees
the majority of the proposed language is currently verified in
Publication 14 with G‑S.2. Facilitation of Fraud, S.2.1.6. Combined
Zero/Tare(0/T) Key and S.2.3. Tare listed as the HB 44 code references.
The WG did not change any existing HB 44 Tare requirements and
recommended an amended definition for "Tare mechanism." The Sector also
agreed with the WG that the highlighted items for calculated weights and
the identification of preset tare weights go beyond what is currently
evaluated by NTEP and recommends these items be split into 320‑3B and
320‑3C.

[]{#__RefHeading___Toc189113363 .anchor}**6.(b) Amend Scales Code and
AWS Code Paragraph S.1.1.1. Digital Indicating Elements**

**2006 Sector Recommendation:** Amend Scales Code and AWS Code
paragraph S.1.1.1. Digital Indicating Elements to clarify that a scale
can display a "center-of-zero" indication with a load on the platform,
provided the indication has been zeroed by a tare mechanism while the
scale is in the net mode of operation.

**NCWM Recommendation/Action:** This item became 2007 NCWM S&T Agenda
Item 320‑2 and was given "informational" status. This proposal was
amended after the 2007 NCWM Interim Meeting to include language
addressing the "center-of-zero" requirements to coincide with 2007 NCWM
S&T Agenda Item 320‑1, S.1.1.(c) Zero Indication; requirements for
markings of indications for other than digital zero indications.
Item 320‑1 was withdrawn from the agenda making the changes to
S.1.1.1.(a) no longer necessary.

At the 2007 NCWM Annual Meeting, the Committee heard testimony from the
CWMA, NEWMA, WMD, and SMA stating that this item has changed from the
original intent to verify that zero tracking could be operable in the
net mode, to now include the addition of other language which alters the
requirement even more. For example, in paragraph S.1.1.1.(a), stating
"and" instead of "or" would make both requirements mandatory. Also, if
"or" is used instead of "and," then this proposal lowers the current
requirement of ½ e to ¼ e. The SMA further stated that the wording in
the proposed paragraph (a) adds a dual requirement inconsistent with
Canadian and OIML requirements. Therefore, the CWMA, NEWMA, and SMA
recommended the proposal be moved back to informational for further
consideration.

The Committee agreed with comments that the modifications to the
originally proposed language in Publication 15 that now appears in
Publication 16 significantly changed the original intent of the
proposal. Additionally, the changes to the center-of-zero indication
requirements are in conflict with OIML recommendations and Canadian
requirements.

The Committee recommends the alternate proposal from the WMD in the
Committee's Annual Report become a carryover item for the 2008 Committee
agenda since that text is consistent with the intent of the original
proposal from the NTETC Weighing Sector.

**Discussion/Conclusion:** The Sector reviewed the above information and
agreed to support the WMD language as recommended in the 2007 NCWM S&T
Committee Final Report on Agenda Item 320‑2.

[]{#__RefHeading___Toc189113364 .anchor}**6.(c) Amend Scales Code
Paragraph S.1.2.1. Weight Units**

**2006 Sector Recommendation:** Amend Scales Code paragraph S.1.2.1.
Weight Units and AWS Code paragraph S.2.1. Value of Division Units by
adding a note that permits calculated net weights from multi-interval
and multiple range scales to be in units other than 0, 1, 2, and 5 in
order to maintain the accuracy of tare weights when the gross weights
are in a weighing range with a larger scale division.

**NCWM Recommendation/Action:** This item became 2007 NCWM S&T Committee
Agenda Item 320‑3. During the 2007 NCWM Annual Meeting, the Committee
heard comments from the CWMA and NEWMA supporting this item with
recommendations to change the word "value" to "division" and
incorporating the SWMA recommendation to modify paragraph S.2.3.

NEWMA pointed out that the proposed amendment to S.1.2.1. appears to be
permissive and not a requirement and asked if the intent was to prohibit
multi-interval and multiple range scales from rounding indicating
calculated net weights in scale divisions to only 1, 2, or 5 when
appropriate or is rounding the scale divisions of 1, 2, or 5 still
allowed? The WMD representative to the NCWM Tare Work Group stated that
the intent was for the language to be permissive because there are a
significant number of NTEP-certified devices in the marketplace that
round tare values before calculating net weights.

The S&T Committee made several modifications to the proposal:

> \- to clarify the examples in the proposed note to paragraph S.1.2.1.,
> and
>
> \- to clarify the SWMA proposed modification to the language in S.2.3.
> for an exception for multi-interval and multiple range scales only
> applies to the requirement that the value of tare shall be equal the
> value of the scale division.

The Committee also agreed that the words "scale value" should be changed
to "scale division" and recommended the NIST technical advisor forward
the amended proposal to the Tare Work Group and NTETC Weighing Sector
for their consideration and comment.

During their August 7, 2007, conference call, the Tare Work Group agreed
with the recommendations of the S&T Committee. The group also recognized
that the proposed note in S.2.1. is inconsistent with OIML R 76. The
Group also noted that the R 76 solution to similar examples is to
indicate and record net weight calculations where that would be
mathematically incorrect since the net weight display would be rounded
to the value of d based on the internal resolution of the gross and tare
weights.

**Discussion/Conclusion:** The Sector reviewed the above information and
provided the S&T Committee with the following comments:

The Sector supports the item, however it believes there is insufficient
information in the example. The example in the note for
paragraph S.1.2.1. should provide the values for d or e for each
weighing range or segment. Additionally, the second example should come
up with a net value that is different than the first example.

The Sector did not have time to provide alternate examples. However, the
NIST technical advisor agreed to work with the WWMA S&T Committee during
their annual technical conference that immediately followed the meeting
of the Weighing Sector.

[]{#__RefHeading___Toc189113365 .anchor}**6.(d) Amend Scales Code
Tolerance Paragraph T.N.2.1. General**

**2006 Sector Recommendation:** Amend Scales Code paragraph T.N.2.1.
General and AWS Codes paragraph T.2.1. General to clarify that
tolerances are also applied to net weight indications from a net
indication of zero using any possible tare load.

**NCWM Recommendation/Action:** This item also became 2007 NCWM S&T
Committee Agenda Item 320‑3. The S&T Committee further modified the
proposed formula for subtractive tare in subparagraph 1 that appears in
the definition of "tare mechanism" to clarify that the combined net and
tare net weight value should not exceed the permissible gross weight
capacity.

The S&T Committee agreed that lengthy discussions on all of the tare
proposals demonstrate that, although it is necessary to address tare,
the matter is too complex to move forward without a more thorough review
of all related proposals by the Weighing Sector and jurisdictions.
Consequently, the S&T Committee recommended this proposal and other
related proposals intended to address tare features remain as
Information items for further review and development. The Committee also
agreed that all tare related items, when ready, should be presented for
voting as a block.

**Discussion/Conclusion:** The Sector reviewed the proposal to amend
Scales Code paragraph T.N.2.1. and AWS Code paragraph T.2.1. and agreed
that it has no additional comments to forward to the NCWM S&T Committee.

## 7. Minimum Size of Weight and Units Indications

**Source:** 2006 Weighing Sector Item 6 (Carryover Item)

**Background:** See the 2007 NCWM Specifications and Tolerance Committee
Annual Report Item 320‑4 "S.1.4.6. Height., Definition of Minimum
Reading Distance, UR.2.10. Primary Indicating Elements Provided by the
User and Definition of Primary Indications," and the 2006 Weighing
Sector Summary Item 6 for additional background information.

## 

This proposal was originally developed to address a growing problem with
the readability of weight indications and the values that define
transaction information. Field and laboratory officials indicate both
are becoming increasingly smaller, as demonstrated in the 2006 Weighing
Sector (Item 6) example of a weight display where the actual size of the
weight values are 23 mm in height, but the unit of measurement (g) is
4 mm in height.

The status of this item was changed to Developing during the January
2007 NCWM Interim Meeting and was moved to Appendix A as Item 360‑2:
Developing Items Part 1, Item 1 Scales. During the 2007 NCWM Annual
Meeting, the Committee was informed that the NTETC Weighing Sector will
continue to develop this item.

At its 2007 NTEP Participating Laboratory meeting, the weighing device
labs discussed this item and reviewed the equivalent recommendations in
OIML R 76. It was noted that the minimum height requirement for the
weight display applied to scales used in direct sale applications with a
capacity of 100 kg or less. Additionally, it was noted that R 76 was
written to apply to weighing devices that indicated primarily in SI
units and that U.S. scales are frequently configured with both SI and
inch-pound units. The labs agreed with the suggestion that the proposed
language for the minimum height of the weight display be limited to
scales used in direct sales with a capacity of 100 kg or less. The
minimum height of the "units" indication only would be applicable to
devices with external lb/kg switching capability since there would be no
chance of facilitating fraud using the lb/kg switching capability.

The NIST technical advisor contacted a manufacturer about the labs'
recommendation to revise proposed S.1.4.6. The manufacturer believed
most products could comply; however, he could not speak for other
manufacturers. He also stated that this did not address questions about
the minimum size of an annunciator that points to a unit legend
silkscreen on the scale next to the annunciator.

WMD believes there has been too little discussion on the clarity of the
displays and annunciators and perhaps the proposal should include
language similar to the following Handbook 130 Packaging and Labeling
Regulation paragraphs:

-   8.1.2. Style of Type or Lettering states that the "declaration or
    declarations of quantity shall be in such a style of type or
    lettering as to be boldly, clearly, and conspicuously presented with
    respect to other type, lettering, or graphic material on the
    package, except that . . .," and

-   8.1.3. Color Contrast states that the "declaration of quantity shall
    be in a color that contrasts conspicuously with its background . .
    ."

**Discussion/Conclusion:** The NIST technical advisor amended the
proposal to address the concerns and suggestions from the manufacturers,
NTEP labs, and WMD. The NIST technical advisor did not develop any
changes to the proposed definition of "Primary Indications" or to the
proposed User Requirements and associated definition for "Minimum
Reading Distance."

Manufacturers stated they prefer the proposed paragraph be written so
the requirements apply to new NTEP applications instead of all devices
manufactured after the effective date. They state that the cost to
modify the design of the scale displays is not justified considering
they have not received comments from their customers stating consumers
are complaining that the size of the displays are too small.
Additionally, the majority of the Sector believed the current definition
for "primary indications" in HB 44 is sufficient and that it be deleted
from the proposal.

The Sector agreed to submit the following revised language to the
regional weights and measures associations and the NCWM S&T Committee.
The Sector also recommends deleting the proposed amendment to the
definition of primary indications. Additionally, the Sector did not
discuss or make any recommendations on the proposed user requirements
and definition for "minimum reading distance."

**S.1.4. Indicators.**

> ***[S.1.4.6. Direct Sale Primary Indications -- Size and Character.
> Scales designed for direct sale applications with a capacity of 100 kg
> (200 lb) or less shall comply with the following:]{.underline}***

a.  ***[All indications shall be indicated clearly and
    simultaneously.]{.underline}***

b.  **[*All indications and associated descriptive markings (e.g., lb,
    kg, gross, tare, net, etc.) shall be presented in such a style of
    type or lettering as to be boldly, clearly, and conspicuously
    presented with respect to other type, lettering, or graphics and
    shall be at least 2 mm ( ^3^/32* *in) high.*]{.underline}**

c.  ***[All indications and associated descriptive markings shall be in
    a color or shade that contrasts conspicuously with its
    background.]{.underline}***

d.  ***[All primary numeric indications displayed to the customer shall
    be at least 9.5 mm (0.4 in) high,]{.underline}***

e.  **[*All units and descriptors shall be at least 2 mm ( ^3^/32* *in)
    high.*]{.underline}**

> ***[\[Nonretroactive as of January 1, 200X\]]{.underline}***
>
> ***[(Added 200X)]{.underline}***

# New Items

## 8. Level Indicating Means -- Out-of-Level Test

**Source:** Paul Lewis, Rice Lake Weighing Systems

**Background:** Rice Lake Weighing Systems reported there appears to be
some confusion within the weighing industry regarding the interpretation
of the level requirements in Handbook 44 and Publication 14. Several
individuals believe the reference to 5 % refers to 5 % of 90 degrees.
This would make the angle for the requirements 4.5 degrees. Therefore,
some manufacturers are stating that their devices are "certified" for
use out-of-level up to 4.5 degrees.

Handbook 44 Scales Code paragraph S.2.4. Level-Indicating Means. states:

> Except for portable wheel-load weighers and portable axle-load scales,
> a portable scale shall be equipped with level indicating means if its
> weighing performance is changed by an amount greater than the
> appropriate acceptance tolerance when it is moved from a level
> position and rebalanced in a position that is out of level in any
> upright direction by 5 % (approximately three degrees). The
> level-indicating means shall be readable without removing any scale
> parts requiring a tool.

Rice Lake reports that the reference to 5 % infers this is based on a
grade or slope on a 180 degree plane. However, HB 44 does not clearly
state it.

The NTEP director added that 5 % out of level means a rise of 5 % of a
100 % run or, in other words, the increase in height is 5 units for
every 100 units of run. That means a 45 degree angle would be a 100 %
slope. Using this you can calculate the angle by taking the arctangent
of ^5^/100 or 0.05 which is 2.86 degrees or, rounded off, 3 degrees.

Rice Lake submitted a proposal to amend Publication 14 Digital
Electronic Scales Sections 56. Level-Indicating Means -- Portable
Scales, 63.4. Out-of-Level Test (If Applicable), and 71 Performance and
Permanence Tests for Type Evaluation of Electronic Vehicle-On-Board
Weighing Systems by adding a new note to clarify the requirement.

Sector members pointed out that the reference paragraph in HB 44 states
that the scale's weighing performance cannot shift by an amount greater
than the appropriate acceptance tolerance when it is "placed
out‑of‑level by 5 % (approximately three degrees)." The exact conversion
of 5 % to degrees is 2.86 degrees. As a result, it is possible that a
portable scale without a level indicating means may comply with
paragraph S.2.4. when placed out-of-level by 5 % and fail when placed
out-of-level by 3°. Additionally, some Sector members believe this is
more an interpretation issue that can be better addressed in EPOs,
newsletters, etc., and that Publication 14 section 63.4. "Out-of-Level
Test" uses the phrase "3° (or 5 percent)" instead of the language in
HB 44 paragraph S.2.4. "5 % (approximately three degrees)."

The Sector agreed to recommend the language in Publication 14 be amended
to be consistent with HB 44 and that a note be added to clarify that
"5 percent refers to a 5 percent slope/grade."

## 9. Wireless Communication Information on the Certificate of Conformance (CC)

## 

**Source:** Stephen Langford, Cardinal Scale Manufacturing Co./Detecto
Scales Co.

**Background:** The Sector was asked to review the 2006 Summary of the
Weighing Sector Agenda Item 9 for additional background information
regarding the development and subsequent recommendation of the type
evaluation procedures for wireless communication for metrological
information.

Stephen Langford, Cardinal Scale Manufacturing Co./Detecto Scales Co.
stated that in many instances the wireless component consists of a
separate module connected to the serial port on the indicating device.
This module is usually a purchased item although in some instances could
be contained within the indicating device enclosure. Listing a specific
make or model of the wireless module on the indicating device\'s NTEP
Certificate of Conformance effectively limits the manufacturer to the
use of that specific wireless module which was used in the original
evaluation. This presents a problem when, the manufacturer is no longer
able to purchase that particular device, a more cost-effective
substitute is found, or a change is made in the module. In these
instances, the manufacturer has no alternative but to have their device
re-evaluated in order to maintain the wireless feature on the NTEP
certificate.

Cardinal/Detecto also recommended that the wireless feature should be
listed simply as a "wireless interface" rather than listing a specific
model of wireless interface module. This would allow other types of
wireless modules to be substituted without having to submit the device
for further examination.

Cardinal/Detecto also stated that NTEP is concerned with the manner in
which the indicating or transmitting device and the peripheral or
receiving device respond to the loss or degradation of the wireless
signal. NTEP is not concerned with the manner in which the data is
transmitted or the frequency or type of modulation or encryption method.
NTEP's primary concern, however, is that an incorrect weight value is
not displayed, recorded, or otherwise interpreted as a valid weight.
This is a function of the indicating device and/or the receiving device
and not that of the wireless module. Therefore, the characteristics of
the wireless module itself are not metrologically significant and,
hence, do not need to be listed on the NTEP certificate.

**Discussion:** The Sector reviewed the background information and
discussed the recommendation to amend the information on the NTEP CC to
discontinue listing the specific model of the wireless interface and
list the "wireless interface" as a feature or option on the NTEP CC.

The Sector also discussed the value of listing the specific model of the
wireless communication device(s) on the scale CC since the majority of
the devices are added onto the device as opposed to being an integral
part of the scale. An example of an integral wireless communication
scale is a crane scale where the load-receiving element is remotely
located from the user operator and indicating element. Alternatively, a
crane scale can have wireless communication through a non-integral
wireless device provided by the OEM or a third party supplier.

Manufacturers stated that it would be difficult for the holder of a CC
to keep the CC up-to-date due to the frequent turnover of suppliers and
models of wireless communication devices. A participating laboratory
stated that using a wireless device is equivalent to a cable that
connects separable elements. Other manufacturers stated that the
non-integral devices not submitted for NTEP verification, including
third party add-on devices, should be permitted provided the "wireless
communication" of digital information was verified during type
evaluation with a representative wireless communication device. The
manufacturers also stated that this policy should not apply to wireless
devices that transmit analog information from a W/LRE and the indicating
element.

**Conclusion**: Based on the above discussion, the Sector stated that it
is not necessary to indicate the specific model of a wireless device on
a CC. Additionally, it was noted that Publication 14 does not require
the model designation of the wireless device be listed on the CC. The
Sector recommended the term "wireless interface" be listed as a
"Standard Feature or Option" on the CC rather than listing the specific
model of the wireless device. The Sector also recommended that the
manufacturer and model of the wireless device be included in the "Test
Conditions" portion of the CC to be consistent with the technical policy
in Publication 14 Section B. Certificate of Conformance Parameters which
states that only the features and options evaluated will be included on
the CC.

## 

During the development of the Sector summary, the NIST technical advisor
reviewed Publication 14 to determine if changes were needed in case the
Sector recommendation was in conflict with existing technical policies
and checklist procedures. Although it appears there are no conflicts,
the technical advisor recommended the following changes highlighted in
underlined and shaded text to section 11.19 to facilitate consistent
application of the Sector recommendation. The technical advisor believes
that no changes to Publication 14 Section B. Certificate of Conformance
Parameters and the procedures in sections 11.19.1 through 11.19.6 are
required.

+----+---------------------------------------------------------+-------+
| 11 | As used in this section, a wireless communications      |       |
| .1 | device may include weighing elements, load-receiving    |       |
| 9. | elements, indicating elements, recording elements       |       |
|    | (output), etc., with integral or separate add-on        |       |
|    | communication devices capable of transmitting and/or    |       |
|    | receiving metrological information between elements.    |       |
|    |                                                         |       |
|    | In order for the wireless communication capability to   |       |
|    | be listed on the CC, t~~T~~he following procedures      |       |
|    | shall be used to evaluate indicating elements that      |       |
|    | communicate digital weight and other information from   |       |
|    | separable load-receiving elements (LRE) or other        |       |
|    | peripheral equipment (i.e., PC or remote control) by    |       |
|    | means of a radio transmitter/receiver or other wireless |       |
|    | communication devices. At least two (2) complete        |       |
|    | devices (e.g., crane scales), or a combination of       |       |
|    | separable indicating, LRE, and recording elements shall |       |
|    | be evaluated to ensure:                                 |       |
+----+---------------------------------------------------------+-------+
|    | 11.19.1. . . .                                          |       |
+----+---------------------------------------------------------+-------+

## 

## 10. Hopper Scale Design Parameters -- Technical Policy

**Source:** NTEP Participating Laboratories

**Background:** Currently due to changes in some state requirements,
hopper scales used in concrete batch plants need to be NTEP certified.
This presents a concern as to what defines the "type" of hopper scales
since there are a multitude of hopper scale variants in order to fit
different installations and applications. Also, as the labs discussed,
"What characterizes the parameters that will be covered on a single NTEP
CC?"

With concrete batch plants in particular, there can be several different
shapes, capacities, numbers of supports, method of load application
(tension/compression), and permanent/portable designs, etc., all at one
installation site.

No specific information is contained in Publication 14 regarding the
tests required for these different parameters.

This item was discussed at the May 2007 NTEP Lab meeting. The labs were
not in agreement as to the parameters that would define the device type.
The labs were also not in agreement as to whether or not these different
parameters should be contained on a single NTEP CC or each different
parameter should be on a separate NTEP CC. The only parameter listed in
Publication 14 is rectangular or circular hopper. There is no mention of
number of supports, supports above or below (tension or compression), or
several other parameters in Publication 14. During the meeting, the labs
discussed this issue and could not reach consensus. The labs did develop
a list of possible parameters to consider.

The following is a list of design (type) and installation parameters
regarding Hopper Scales developed by the NTEP labs during their May 2007
Annual Meeting:

1.  Hopper shape (rectangular, round or oval)

2.  Load cell type (suspension vs. compression)

3.  Portable vs. permanent installation

4.  Mechanical

5.  Electronic

6.  Electro-mechanical

7.  Number of supports

8.  Material input and output mechanism

9.  Accuracy class, no. of divisions, (based on information provided by
    the applicant)

10. Peripherals

11. Tolerance values (Class III, Class III L, Grain, Construction
    Material, ABWS, etc.)

**Discussion:** The NIST technical advisor reported on the NTEP
laboratories' discussion just prior to the Sector meeting and noted the
following items that need to be reviewed or addressed:

-   Publication 14 only discusses some of the parameters for circular or
    rectangular designed hopper scales.

-   The list of design parameters started by the labs should be reviewed
    and discussed.

-   Publication 14 must cover the HB 44 differences between Class III,
    III L, and construction material hopper scales.

-   How should the multiple variations of hopper scales in an
    installation used for a single evaluation be treated?

-   How many certificates need to be issued if there are different types
    of scales in one installation?

-   What tests need to be done?

-   What can be covered in a single evaluation and CC?

-   "Modification of type" technical policies are needed since there are
    scale retrofits that convert mechanical scales to full electronic
    scales and hoppers to hopper scales.

-   How are current active CCs going to be treated when an application
    is received to revise the CC?

-   CCs for only lever systems without the tank/hopper.

The Sector was asked to review and discuss these items (and others that
may not be listed) and to provide some technical guidance to the NTEP
director and the NTEP labs. The labs were asked to determine whether or
not each parameter is a metrologically significant parameter and then
develop recommendations to amend Publication 14, Section B.6.
"Certificate of Conformance Parameters for Weighing Systems Using a Tank
or Hopper Load-Receiving Element." accordingly.

The discussion was focused strictly on hopper scales since the
parameters listed above are not common to other weighing devices.

Don Onwiler indicated that an increasing number of NTEP applications for
hopper scales are being received, particularly for hopper scales used in
concrete batch plants. Designs of these scales vary greatly by geometric
shape, number and type of load cells, methods of support, etc. Mr.
Onwiler added that the term "hopper scale" is insufficient to describe
the "type." Publication 14 Administrative Policy states the definition
of "type" as one that "positively identifies the design" and may vary in
models and parameters. Publication 14 does not provide sufficient tests
to address the various designs and fails to provide guidance on what
needs to be tested. Additionally, questions arose regarding what
information needs to be included on a CC. Mr. Onwiler is concerned that
some CCs already issued have far too many things included based on the
number devices submitted for evaluation. Many Sector members had strong
opinions regarding different characteristics, e.g., number of supports,
different shapes, etc.

Publication 14 includes a definition of the word "type." Don Onwiler
interprets the definition to mean that each design is a type; for
example, a rectangular hopper and a round hopper are different designs
and therefore are also different types. The number of load cells and the
kind of load cells used also affect design. Mr. Onwiler's objective was
to define design so we know how much to include on a single CC since the
CC must be limited to a single design.

Stephen Patoray agreed these different parameters mentioned by Mr.
Onwiler need to be tested, yet Publication 14 does not indicate this. If
these examples are determined to be a different design or type, then a
separate CC is needed for each. However, a single installation being
evaluated can have several hopper scales that differ in many of the
above parameters. NTEP needs guidance. Also, how many CCs are issued in
this kind of example?

No one disagreed about the test to be performed. However, there is no
guidance on what is to be listed on the CC, what describes a family, and
which sample in the family is selected for evaluation.

**Conclusion:** Since there was no specific recommendation submitted on
this agenda item, the Sector could not come to a consensus on the
questions raised on this item and suggested that a hopper scale work
group be established to (1) define what is a type, and (2) determine
selection of device(s) to be submitted for evaluation, modifications
that can be made to the type, and whether or not multiple types can be
listed on a CC. Stephen Patoray and Don Onwiler volunteered to develop a
specific proposal to be considered by the Sector during the 2008 NTETC
Weighing Sector Annual Meeting.

## 11. Method of Sealing -- Set-up and Verification of Calibration/Configuration Access

**Source:** NTEP Director

**Background:** At the 2003 NTEP Participating Laboratory meeting, the
participating labs reported examples where a device could be sealed with
a physical security seal while the device had been configured with
access to external means to change calibration and configuration
parameters. The labs have been using HB 44 General Code paragraph G-S.2.
Facilitation of Fraud to require the applicants to correct this problem.

The discussion in 2003 was to address a specific deficiency that was
found in several devices at that time. At least one device manufacturer
attempted to address this deficiency with changes to the device
function. This device was evaluated and based on the input from the NTEP
lab, the NTEP Committee chair and the NTEP director; it was determined
that this device met the requirements. Currently several NTEP labs do
not believe that this "fix" is acceptable.

It was requested that the Sector review the item from the NTETC Weighing
Sector Annual Meeting September 11 ‑ 13, 2003, in Fresno, California,
Final Summary, Item 18. Physical Security Seals on Scales with External
Calibration Capability.

There is still disagreement among the NTEP labs on this topic. There may
be a problem with Pub 14 since the current procedures and type
evaluation requirements are not fully supported by HB 44 since the
changes were made to Pub 14 in the anticipation of changes to HB 44 and
the changes to HB 44 were never submitted.

**Discussion:** There is disagreement among the NTEP labs on this topic.
If you review the 2003 item from the Sector, changes were made to Pub 14
in the anticipation of changes to HB 44. The changes to HB 44 did not
happen. There may be a problem with Pub 14 since the current procedures
and type evaluation requirements are not fully supported by HB 44.

Stephen Patoray described the issue and indicated there were numerous
scales that NTEP had already evaluated with this feature (i.e., an
internal jumper that if left installed after calibration would allow
someone to go into a set-up mode whenever they desired). The devices in
question had a "calibration" switch that enables external keyboard
calibration and configuration adjustments. The operator's manual clearly
stated that the switch must be returned to its initial position to
disable the external adjustment capability for "legal-for-trade"
applications. The "fix" that was accepted required the person going into
the set-up mode to answer the question "Is this a legal-for-trade
device?" If answered "yes," you had to flip a switch to get out. The
only foolproof way was to make two different scales -- one scale for
legal-for-trade applications and one for non-legal-for-trade
applications. Building two different scales was determined to be cost
prohibitive.

Some members of the 2007 Weighing Sector stated that the 2003 Weighing
Sector changes to the 2004 Edition of Publication 14 sufficiently
addressed this problem provided device owners and service agents
configured the device according to setup and calibrations procedures
published in the instruction manuals provided by the manufacturer.
Allowing this feature permits an inspector to seal the device not
knowing if it is in the setup mode because he may not have a copy of the
CC that has instructions on how to verify the "legal-for-trade" status
of the scale.

The Sector considered amendments to the General Code User Requirements
to include language that:

1.  A device shall "be installed **[and a security means
    enabled]{.underline}** in accordance with the manufacturer\'s
    instructions" in paragraph G‑UR.2.1. Installation.

2.  A device shall be located, or such facilities for normal access
    thereto shall be provided to permit inspecting and applying security
    seals **[according to the manufacturer's instructions]{.underline}**
    to the device in paragraph G‑UR.2.3. Accessibility for Inspection,
    Testing, and Sealing Purposes.

3.  A security seal shall be appropriately affixed **[according to the
    manufacturer's instructions]{.underline}** to any adjustment
    mechanism designed to be sealed in paragraph G‑UR.4.5. Security
    Seal.

    The Sector decided that changes to the User Requirements would not
    be suitable since users and officials may not always have access to
    the manufacturer's instructions. The Sector, therefore, developed
    the following proposed amendment to General Code paragraph G‑S.8.
    Provisions for Sealing Electronic Adjustable Components:

> ***G-S.8. Provision for Sealing Electronic Adjustable Components.** -
> A device shall be designed with provision(s) for applying a security
> seal that must be broken, or for using other approved means of
> providing security (e.g., data change audit trail available at the
> time of inspection), before any change that detrimentally affects the
> metrological integrity of the device can be made to any electronic
> mechanism.*
>
> *\[Nonretroactive as of January 1, 1990\]*

A device may be fitted with an automatic or a semi-automatic calibration
mechanism. This mechanism shall be incorporated inside the device. After
sealing, neither the mechanism nor the calibration process shall
facilitate fraud.

> (Added 1985) (Amended 1989 and 1993)

**Conclusion:** The Sector agreed to submit the proposed language to
amend G-S.8. Provisions for Sealing Electronic Adjustable Components to
the NCWM S&T Committee.

# Next Sector Meeting

Discussion/Conclusion: Measurement Canada (Ottawa) is the next
laboratory location in the normal rotation of NTEP participating
laboratories.

The Sector was asked to discuss these and other locations and make a
recommendation for the date and location of the 2008 Annual Meeting of
the NTETC Weighing Sector.

It was reported by some of the Sector members that several industry and
weights and measures associations meetings and conferences are being
held in September 2008, including the WWMA (Alaska), the CWMA
(Oklahoma), and the American Railway Engineering and Maintenance-of-Way
Association (Utah). A suggestion was made to have the Sector meet in
conjunction with one of these associations since it would eliminate an
extra trip for many Sector members attending one or more of these
meeting. However, the Sector agreed to recommend that the next meeting
of the NTETC Weighing Sector be held in Ottawa, Canada, and that
consideration be given to schedule a date that does not conflict with
the above-mentioned association meetings and conferences.

## Appendix A -- Recommendations for Amendments to Publication 14[^1]

**Agenda Item 1:** CLC Type Evaluation Tests on Railway/Vehicle Scales
-- Technical Policy

**E. Modification of Type** (Digital Electronic Scales Checklist 12-13)

7\. **Adding a dump-through option/modification,** without modifying the
lever system or load cell placement, to vehicle[~~s,~~ railway track, or
combination vehicle/railway track scales where the ~~vehicle~~ load
s]{.mark}upport primarily comes from the beams and girders on a scale
with a combination steel and concrete weighbridge or all steel
weighbridge construction, does **not** require evaluation for an
existing CC to apply, however, the modification option must be listed on
the CC.

8\. **Adding a dump-through option/modification**, to vehicle[, railway
track, or combination vehicle/railway track]{.mark} scales with [other
than beam and girder design]{.mark} ~~does~~ requires [~~an~~ a
full]{.mark} evaluation to be listed on a new or existing CC.

9\. **Adding a rotary dump feature/option/modification to a railway
track scale** requires ~~an~~ [a full]{.mark} evaluation to be listed on
a new or existing CC.

[[10. **Adding a vehicle scale feature or option to an active railway
track scale CC** does not require additional evaluation provided
that:]{.underline}]{.mark}

[]{.mark}

b.  [[The shift test data (located over the sections and mid span
    between sections) be used to demonstrate compliance with the CLC
    requirements for the vehicle portion of the
    scale.]{.underline}]{.mark}

> []{.mark}

c.  [[The e~min~ for the vehicle scale is the smallest e~min~ value that
    was evaluated on the railway track scale
    certificate.]{.underline}]{.mark}

> []{.mark}

d.  [[The CLC for the vehicle scale portion of the device must not
    exceed the maximum test weight used for the section test of the
    railway track scale. The CLC listed on the CC shall be no greater
    than what would be permitted in
    Section B. 8. d.]{.underline}]{.mark}

e.  [[The design of the LRE is no wider than 12 ft (See footnote 3 in
    Section B. 8.1. c.).]{.underline}]{.mark}

[[The railway track scale is a beam and girder
design.]{.underline}]{.mark}

**Agenda Item 2:** In-Motion Railway Track Scale Performance and
Permanence -- Technical Policy (Carryover)

68\. Performance Tests for Railway Track Scale
[[Controllers]{.underline}]{.mark} Used to Weigh In-Motion

Performance tests are conducted to determine compliance with the
tolerances. The tests described here apply primarily to the indicating
element[, the in-motion system controller (which may include the
indicating element), and recording element(s).]{.mark}

[]{.mark}

[The in-motion system controller performance tests are to be conducted
with a railway track scale load-receiving element used in an "in-motion"
railway track scale application without the use of simulation devices
(e.g., load cells, sensors, and other digital inputs intended to
simulate actual use).]{.mark}

[]{.mark}

It is assumed that the weighing/load-receiving element used during the
test has already been examined and been found to comply with applicable
requirements in Section 69. If the design and performance of the
weighing/load-receiving element is to be determined during the same
test, the applicable requirements [~~for~~ in Section 69. Performance
and Permanence Tests for Railway Scales ~~Used to Weigh Statically~~
must also be referenced.]{.mark}

[]{.mark}

The following checklist provides specific items to be checked on an
in-motion railway track scale [system controller.]{.mark}

[]{.mark}

+----+--------------------------------------------------+--------------+
| 6  | [~~Insure~~ Assure]{.mark} that the [in-motion   | Yes No N/A   |
| 8. | controller]{.mark} scale will not indicate or    |              |
| 1. | record a weight when the train speed exceeds the |              |
|    | manufacturer\'s [declared]{.mark} allowable      |              |
|    | limit.                                           |              |
+----+--------------------------------------------------+--------------+
| 6  |                                                  | Yes No N/A   |
| 8. |                                                  |              |
| 2. |                                                  |              |
|  - |                                                  |              |
| 6  |                                                  |              |
| 8. |                                                  |              |
| 7. |                                                  |              |
| *  |                                                  |              |
| ** |                                                  |              |
| [( |                                                  |              |
| no |                                                  |              |
| ch |                                                  |              |
| an |                                                  |              |
| ge |                                                  |              |
| )] |                                                  |              |
| {. |                                                  |              |
| ma |                                                  |              |
| rk |                                                  |              |
| }* |                                                  |              |
| ** |                                                  |              |
+----+--------------------------------------------------+--------------+
| 6  | On [installations ~~systems~~]{.mark} where cars | Yes No N/A   |
| 8. | are not to be coupled during [in-m]{.mark}otion  |              |
| 8. | weighing, (i.e., [uncoupled-in-motion]{.mark}    |              |
|    | weighing systems) the [in-motion                 |              |
|    | controller]{.mark} instrument must selectively   |              |
|    | prevent the weight of coupled cars from being    |              |
|    | recorded.                                        |              |
+----+--------------------------------------------------+--------------+
| 6  | When the [primary indication or recorded         | [[Yes No     |
| 8. | representation ~~digitizer~~]{.mark} indicates   | N/A]{.underl |
| 9. | zeros for the weight of a railcar, a message     | ine}]{.mark} |
|    | must be printed indicating the nature of the     |              |
|    | fault.                                           | [[(editori   |
|    |                                                  | al)]{.underl |
|    |                                                  | ine}]{.mark} |
+----+--------------------------------------------------+--------------+

Handbook Compliance

[Appropriate l~~L~~]{.mark}aboratory tests of the indicating element
must be completed prior to the field performance [~~and
permanence~~]{.mark} testing to assure compliance with the applicable
requirements of Handbook 44.

[~~If the WIM Controller to be tested incorporates an indicating element
with NTEP approval and the indicating element to be tested processes
only digital information (**\"**indicators\"), then the laboratory test
for Influence Factors may be waived.~~]{.mark}

Test Standards *[(no change)]{.mark}*

Performance Test *[(no change)]{.mark}*

[]{.mark}

[~~Permanence Test~~]{.mark}

[]{.mark}

[~~The permanence test shall be conducted after a minimum of 20 days
after successful completion of the initial performance test. It is
recommended that the performance tests described above be repeated.
However, if the original test car is not available, the static test may
be conducted with a composite test car. The results of this test must be
within the in-motion tolerances specified in Handbook 44. If the device
does not meet these tolerance limits, the entire test must be repeated,
including successful initial performance testing and a subsequent test
after a minimum of 20 days.~~]{.mark}

Determine the Type of Test: **[(no change)]{.mark}**

Rail Scale Testing *[(no change)]{.mark}*

Inspect the Scale *[(no change)]{.mark}*

The Static Test *[(no change)]{.mark}*

The [In-]{.mark}Motion Test

Recording Results, Coupled-In-Motion Test Individual Car: *[(no
change)]{.mark}*

**Agenda Item 4.(b):** G-S.5.6.1. Indicated and Recorded Representation
of Units -- Appropriate Abbreviations and Table 1. Recorded
Representation of SI Units on Equipment with Limited Character Sets

**12. Values Defined**

**Code References: G-S.5.2.4., G-S.5.3.1., G-S.5.6., and G-S.5.6.1.**

Graduations, indications, and recorded values that are intended to have
specific values shall be adequately identified by a sufficient number of
figures, words, and symbols. These defining terms shall be uniformly
placed relative to the graduations, indications, and recorded values and
as close as practical to them without interfering with their
readability. When SI units are used, the symbols shall comply with those
given [~~in Table 1 of the General Code (Section 1.10 of Handbook 44).
Other symbols shall comply with the abbreviations given~~]{.mark} in
Appendix C (General Tables of Units of Measurement) in Handbook 44 [[or
NIST Special Publication SP 811 "Guide for the Use of International
System of Units (SI)."]{.mark}]{.underline} Other symbols shall comply
with the abbreviations given in Appendix C (General Tables of Units of
Measurement) in Handbook 44. Exceptions are the
abbreviation[[s]{.underline}]{.mark} for
[["]{.underline}carat["]{.underline}]{.mark} ([[c
or]{.mark}]{.underline} ct), U.S. short ton (ton or TN),
[~~and~~]{.mark} U.S. [["]{.underline}long ton["]{.underline}]{.mark}
(LT), and ~~the~~ [["]{.underline}grain[" in Publication 14 DES
Section 76]{.underline}]{.mark}[.]{.underline}

76\. List of Acceptable Abbreviations/Symbols

+-----------------+----------------+-----------------+----------------+
| **Device        | **Term**       | **Acceptable**  | **Not          |
| Application**   |                |                 | Acceptable**   |
+-----------------+----------------+-----------------+----------------+
| **Values        | SI Units       | [~~Table 1 of   |                |
| Defined:**      |                | the General     |                |
|                 |                | Code~~ [NIST    |                |
|                 |                | Special         |                |
|                 |                | Publication 811 |                |
|                 |                | -- "Guide for   |                |
|                 |                | the Use of      |                |
|                 |                | International   |                |
|                 |                | System of Units |                |
|                 |                | (SI)."]{.und    |                |
|                 |                | erline}]{.mark} |                |
+-----------------+----------------+-----------------+----------------+
|                 | Notes on SI    |                 | [[upper case   |
|                 | Units:         |                 | "KG]{.mark}    |
|                 |                |                 | "]{.underline} |
|                 | • lower case   |                 |                |
|                 | "kg" on        |                 |                |
|                 | display panels |                 |                |
|                 | & keys         |                 |                |
|                 |                |                 |                |
|                 | • lower case   |                 |                |
|                 | "kg"           |                 |                |
|                 | [[shall]{.mark |                 |                |
|                 | }]{.underline} |                 |                |
|                 | ~~should~~ be  |                 |                |
|                 | used for       |                 |                |
|                 | printing       |                 |                |
|                 | [~~when        |                 |                |
|                 | possible;      |                 |                |
|                 | upper case     |                 |                |
|                 | "KG" is        |                 |                |
|                 | acceptable     |                 |                |
|                 | only if lower  |                 |                |
|                 | case "kg"      |                 |                |
|                 | cannot be      |                 |                |
|                 | pri            |                 |                |
|                 | nted~~]{.mark} |                 |                |
+-----------------+----------------+-----------------+----------------+
|                 | Other symbols  | [HB 44          |                |
|                 |                | Appendix C --   |                |
|                 |                | General Tables  |                |
|                 |                | of Units of     |                |
|                 |                | Measureme       |                |
|                 |                | nt]{.underline} |                |
|                 |                | [~~General      |                |
|                 |                | Table of        |                |
|                 |                | Weights and     |                |
|                 |                | Measures,       |                |
|                 |                | HB              |                |
|                 |                |  44~~]{.mark}\* |                |
+-----------------+----------------+-----------------+----------------+

**Agenda Item 4.(c):** G-S.8.1. Multiple Weighing or Measuring Elements
that Share a Common Provision for Sealing

+-----+----+-------------------------------------------+--------------+
| **  |    |                                           | []{.mark}    |
| 10. |    |                                           |              |
| Pro |    |                                           |              |
| vis |    |                                           |              |
| ion |    |                                           |              |
| For |    |                                           |              |
| Met |    |                                           |              |
| rol |    |                                           |              |
| ogi |    |                                           |              |
| cal |    |                                           |              |
| S   |    |                                           |              |
| eal |    |                                           |              |
| ing |    |                                           |              |
| of  |    |                                           |              |
| A   |    |                                           |              |
| dju |    |                                           |              |
| sta |    |                                           |              |
| ble |    |                                           |              |
| C   |    |                                           |              |
| omp |    |                                           |              |
| one |    |                                           |              |
| nts |    |                                           |              |
| or  |    |                                           |              |
| Au  |    |                                           |              |
| dit |    |                                           |              |
| T   |    |                                           |              |
| rai |    |                                           |              |
| l** |    |                                           |              |
+-----+----+-------------------------------------------+--------------+
| **C |    |                                           | []{.mark}    |
| ode |    |                                           |              |
| Ref |    |                                           |              |
| ere |    |                                           |              |
| nce |    |                                           |              |
| [s: |    |                                           |              |
| G-  |    |                                           |              |
| S.8 |    |                                           |              |
| .1. |    |                                           |              |
| an  |    |                                           |              |
| d]{ |    |                                           |              |
| .ma |    |                                           |              |
| rk} |    |                                           |              |
| S.1 |    |                                           |              |
| .11 |    |                                           |              |
| .** |    |                                           |              |
+-----+----+-------------------------------------------+--------------+
| [1  | [A |                                           | **[Yes No    |
| 0.1 | ch |                                           | N            |
| 1]{ | an |                                           | /A]{.mark}** |
| .ma | ge |                                           |              |
| rk} | to |                                           |              |
|     | a  |                                           |              |
|     | se |                                           |              |
|     | al |                                           |              |
|     | ab |                                           |              |
|     | le |                                           |              |
|     | me |                                           |              |
|     | tr |                                           |              |
|     | ol |                                           |              |
|     | og |                                           |              |
|     | ic |                                           |              |
|     | al |                                           |              |
|     | p  |                                           |              |
|     | ar |                                           |              |
|     | am |                                           |              |
|     | et |                                           |              |
|     | er |                                           |              |
|     | (c |                                           |              |
|     | al |                                           |              |
|     | ib |                                           |              |
|     | ra |                                           |              |
|     | ti |                                           |              |
|     | on |                                           |              |
|     | or |                                           |              |
|     | co |                                           |              |
|     | nf |                                           |              |
|     | ig |                                           |              |
|     | ur |                                           |              |
|     | at |                                           |              |
|     | io |                                           |              |
|     | n) |                                           |              |
|     | of |                                           |              |
|     | a  |                                           |              |
|     | ny |                                           |              |
|     | e  |                                           |              |
|     | le |                                           |              |
|     | me |                                           |              |
|     | nt |                                           |              |
|     | s  |                                           |              |
|     | ha |                                           |              |
|     | ll |                                           |              |
|     | be |                                           |              |
|     | in |                                           |              |
|     | di |                                           |              |
|     | vi |                                           |              |
|     | du |                                           |              |
|     | al |                                           |              |
|     | ly |                                           |              |
|     | i  |                                           |              |
|     | de |                                           |              |
|     | nt |                                           |              |
|     | if |                                           |              |
|     | ie |                                           |              |
|     | d. |                                           |              |
|     | (* |                                           |              |
|     | *N |                                           |              |
|     | ot |                                           |              |
|     | e: |                                           |              |
|     | ** |                                           |              |
|     | Co |                                           |              |
|     | mp |                                           |              |
|     | li |                                           |              |
|     | an |                                           |              |
|     | ce |                                           |              |
|     | wi |                                           |              |
|     | th |                                           |              |
|     | th |                                           |              |
|     | is |                                           |              |
|     | s  |                                           |              |
|     | ec |                                           |              |
|     | ti |                                           |              |
|     | on |                                           |              |
|     | is |                                           |              |
|     | re |                                           |              |
|     | qu |                                           |              |
|     | ir |                                           |              |
|     | ed |                                           |              |
|     | on |                                           |              |
|     | d  |                                           |              |
|     | ev |                                           |              |
|     | ic |                                           |              |
|     | es |                                           |              |
|     | s  |                                           |              |
|     | ub |                                           |              |
|     | mi |                                           |              |
|     | tt |                                           |              |
|     | ed |                                           |              |
|     | f  |                                           |              |
|     | or |                                           |              |
|     | ev |                                           |              |
|     | al |                                           |              |
|     | ua |                                           |              |
|     | ti |                                           |              |
|     | on |                                           |              |
|     | a  |                                           |              |
|     | nd |                                           |              |
|     | ma |                                           |              |
|     | nu |                                           |              |
|     | fa |                                           |              |
|     | ct |                                           |              |
|     | ur |                                           |              |
|     | ed |                                           |              |
|     | on |                                           |              |
|     | or |                                           |              |
|     | a  |                                           |              |
|     | ft |                                           |              |
|     | er |                                           |              |
|     | J  |                                           |              |
|     | an |                                           |              |
|     | ua |                                           |              |
|     | ry |                                           |              |
|     |  1 |                                           |              |
|     | ,  |                                           |              |
|     | 20 |                                           |              |
|     | 10 |                                           |              |
|     | ). |                                           |              |
|     | ]{ |                                           |              |
|     | .m |                                           |              |
|     | ar |                                           |              |
|     | k} |                                           |              |
+-----+----+-------------------------------------------+--------------+
| [   |    |                                           | []{.mark}    |
| [Ex |    |                                           |              |
| amp |    |                                           |              |
| les |    |                                           |              |
| of  |    |                                           |              |
| a   |    |                                           |              |
| cce |    |                                           |              |
| pta |    |                                           |              |
| ble |    |                                           |              |
| id  |    |                                           |              |
| ent |    |                                           |              |
| ifi |    |                                           |              |
| cat |    |                                           |              |
| ion |    |                                           |              |
| of  |    |                                           |              |
| a   |    |                                           |              |
| cha |    |                                           |              |
| nge |    |                                           |              |
| to  |    |                                           |              |
| a   |    |                                           |              |
| met |    |                                           |              |
| rol |    |                                           |              |
| ogi |    |                                           |              |
| cal |    |                                           |              |
| par |    |                                           |              |
| ame |    |                                           |              |
| ter |    |                                           |              |
| of  |    |                                           |              |
| an  |    |                                           |              |
| e   |    |                                           |              |
| lem |    |                                           |              |
| ent |    |                                           |              |
| i   |    |                                           |              |
| ncl |    |                                           |              |
| ude |    |                                           |              |
| but |    |                                           |              |
| are |    |                                           |              |
| not |    |                                           |              |
| l   |    |                                           |              |
| imi |    |                                           |              |
| ted |    |                                           |              |
| to: |    |                                           |              |
| (Ch |    |                                           |              |
| eck |    |                                           |              |
| wh  |    |                                           |              |
| ich |    |                                           |              |
| so  |    |                                           |              |
| lut |    |                                           |              |
| ion |    |                                           |              |
| is  |    |                                           |              |
| u   |    |                                           |              |
| sed |    |                                           |              |
| on  |    |                                           |              |
| the |    |                                           |              |
| de  |    |                                           |              |
| vic |    |                                           |              |
| e.) |    |                                           |              |
| ]{. |    |                                           |              |
| und |    |                                           |              |
| erl |    |                                           |              |
| ine |    |                                           |              |
| }]{ |    |                                           |              |
| .ma |    |                                           |              |
| rk} |    |                                           |              |
+-----+----+-------------------------------------------+--------------+
| []{ | -  | [A broken, missing, or replaced physical  | []{.mark}    |
| .ma |    | seal on an individual element.]{.mark}    |              |
| rk} |  [ |                                           |              |
|     | ]{ |                                           |              |
|     | .m |                                           |              |
|     | ar |                                           |              |
|     | k} |                                           |              |
+-----+----+-------------------------------------------+--------------+
| []{ | -  | [A change in a calibration factor or      | []{.mark}    |
| .ma |    | configuration setting for each            |              |
| rk} |  [ | element.]{.mark}                          |              |
|     | ]{ |                                           |              |
|     | .m |                                           |              |
|     | ar |                                           |              |
|     | k} |                                           |              |
+-----+----+-------------------------------------------+--------------+
| []{ | -  | [Display of the date of or the number of  | []{.mark}    |
| .ma |    | days since the last calibration event for |              |
| rk} |  [ | each element.]{.mark}                     |              |
|     | ]{ |                                           |              |
|     | .m |                                           |              |
|     | ar |                                           |              |
|     | k} |                                           |              |
+-----+----+-------------------------------------------+--------------+
| []{ | -  | [A counter indicating the number of       | []{.mark}    |
| .ma |    | calibration and/or configuration events   |              |
| rk} |  [ | per element.]{.mark}                      |              |
|     | ]{ |                                           |              |
|     | .m |                                           |              |
|     | ar |                                           |              |
|     | k} |                                           |              |
+-----+----+-------------------------------------------+--------------+
| []{ | -  | [Other. (Describe the solution to         | []{.mark}    |
| .ma |    | identify the method of sealing for each   |              |
| rk} |  [ | individual element.)]{.mark}              |              |
|     | ]{ |                                           |              |
|     | .m | []{.mark}                                 |              |
|     | ar |                                           |              |
|     | k} | []{.mark}                                 |              |
|     |    |                                           |              |
|     |    | []{.mark}                                 |              |
+-----+----+-------------------------------------------+--------------+

**Agenda Item 4.(e):** Bench/Counter Scale Shift Test and Definitions

31\. Multi-Interval Scales

A multi-interval scale is an instrument having one weighing range that
is divided into partial weighing ranges (segments). Each weighing range
(segment) is defined by its division size, [its]{.mark} minimum
capacity, and [its]{.mark} maximum capacity. The selection of the
appropriate weighing range (segment) is determined automatically
according to the load applied, both on increasing and decreasing loads.
The shift test shall be conducted at [30 % to 35 %
of~~one-half~~]{.mark} the capacity of the scale. Corner tests, if
appropriate, shall be run at one-quarter of the scale capacity. The
number of scale divisions, n, for each weighing range (segment) is
determined by dividing the maximum capacity of the weighing range
(segment) by e of the same weighing range (segment). In the case of
multi-interval scales, e must be equal to d (see NIST Handbook 44 Scales
section S.5.3.).

+---+------------------------------------------------------------------+
| * |                                                                  |
| * |                                                                  |
| 6 |                                                                  |
| 3 |                                                                  |
| . |                                                                  |
| P |                                                                  |
| e |                                                                  |
| r |                                                                  |
| f |                                                                  |
| o |                                                                  |
| r |                                                                  |
| m |                                                                  |
| a |                                                                  |
| n |                                                                  |
| c |                                                                  |
| e |                                                                  |
| a |                                                                  |
| n |                                                                  |
| d |                                                                  |
| P |                                                                  |
| e |                                                                  |
| r |                                                                  |
| m |                                                                  |
| a |                                                                  |
| n |                                                                  |
| e |                                                                  |
| n |                                                                  |
| c |                                                                  |
| e |                                                                  |
| T |                                                                  |
| e |                                                                  |
| s |                                                                  |
| t |                                                                  |
| s |                                                                  |
| [ |                                                                  |
| [ |                                                                  |
| f |                                                                  |
| o |                                                                  |
| r |                                                                  |
| P |                                                                  |
| l |                                                                  |
| a |                                                                  |
| t |                                                                  |
| f |                                                                  |
| o |                                                                  |
| r |                                                                  |
| m |                                                                  |
| S |                                                                  |
| c |                                                                  |
| a |                                                                  |
| l |                                                                  |
| e |                                                                  |
| s |                                                                  |
| W |                                                                  |
| i |                                                                  |
| t |                                                                  |
| h |                                                                  |
| F |                                                                  |
| o |                                                                  |
| u |                                                                  |
| r |                                                                  |
| o |                                                                  |
| r |                                                                  |
| F |                                                                  |
| e |                                                                  |
| w |                                                                  |
| e |                                                                  |
| r |                                                                  |
| L |                                                                  |
| o |                                                                  |
| a |                                                                  |
| d |                                                                  |
| S |                                                                  |
| u |                                                                  |
| p |                                                                  |
| p |                                                                  |
| o |                                                                  |
| r |                                                                  |
| t |                                                                  |
| s |                                                                  |
| ] |                                                                  |
| { |                                                                  |
| . |                                                                  |
| u |                                                                  |
| n |                                                                  |
| d |                                                                  |
| e |                                                                  |
| r |                                                                  |
| l |                                                                  |
| i |                                                                  |
| n |                                                                  |
| e |                                                                  |
| } |                                                                  |
| ] |                                                                  |
| { |                                                                  |
| . |                                                                  |
| m |                                                                  |
| a |                                                                  |
| r |                                                                  |
| k |                                                                  |
| } |                                                                  |
| ~ |                                                                  |
| ~ |                                                                  |
| C |                                                                  |
| o |                                                                  |
| u |                                                                  |
| n |                                                                  |
| t |                                                                  |
| e |                                                                  |
| r |                                                                  |
| ( |                                                                  |
| B |                                                                  |
| e |                                                                  |
| n |                                                                  |
| c |                                                                  |
| h |                                                                  |
| ) |                                                                  |
| S |                                                                  |
| c |                                                                  |
| a |                                                                  |
| l |                                                                  |
| e |                                                                  |
| s |                                                                  |
| ~ |                                                                  |
| ~ |                                                                  |
| ( |                                                                  |
| I |                                                                  |
| n |                                                                  |
| c |                                                                  |
| l |                                                                  |
| u |                                                                  |
| d |                                                                  |
| i |                                                                  |
| n |                                                                  |
| g |                                                                  |
| [ |                                                                  |
| ~ |                                                                  |
| ~ |                                                                  |
| C |                                                                  |
| o |                                                                  |
| m |                                                                  |
| p |                                                                  |
| u |                                                                  |
| t |                                                                  |
| i |                                                                  |
| n |                                                                  |
| g |                                                                  |
| ~ |                                                                  |
| ~ |                                                                  |
| ] |                                                                  |
| { |                                                                  |
| . |                                                                  |
| m |                                                                  |
| a |                                                                  |
| r |                                                                  |
| k |                                                                  |
| } |                                                                  |
| [ |                                                                  |
| [ |                                                                  |
| P |                                                                  |
| l |                                                                  |
| a |                                                                  |
| t |                                                                  |
| f |                                                                  |
| o |                                                                  |
| r |                                                                  |
| m |                                                                  |
| ] |                                                                  |
| { |                                                                  |
| . |                                                                  |
| m |                                                                  |
| a |                                                                  |
| r |                                                                  |
| k |                                                                  |
| } |                                                                  |
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| ] |                                                                  |
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| 9 |                                                                  |
| 0 |                                                                  |
| . |                                                                  |
+---+------------------------------------------------------------------+
| 6 | Shift Test                                                       |
| 3 |                                                                  |
| . | Test with test loads equal to [30 % to 35 %                      |
| 3 | of~~one-half~~]{.mark} [capacity as specified in                 |
| . | N.1.3.~~1~~7.]{.mark} and at test positions as illustrated       |
|   | below.                                                           |
+---+------------------------------------------------------------------+
|   |                                                                  |
+---+------------------------------------------------------------------+

  ------------------ -----------------------------------------------------------------
  63.7.              Field Permanence Tests

  Review performance 
  of the width of    
  zero, zone of      
  uncertainty,       
  sensitivity, and   
  discrimination     
  near zero and at   
  or near capacity.  

  Make certain that  
  movement of the    
  load cell cable    
  does not affect    
  the "live" load.   

  A minimum of four  
  sets of            
  increasing-load,   
  decreasing-load,   
  and shift tests    
  are to be          
  conducted at the   
  evaluation         
  installation at    
  the start of the   
  field permanence   
  test. The scales   
  are to be tested   
  to capacity using  
  certified test     
  weights. The       
  results of all     
  increasing-load,   
  decreasing-load,   
  and shift tests    
  conducted during   
  the initial tests  
  must be within     
  acceptance         
  tolerances. If     
  scale              
  repeatability is   
  very good (e.g.,   
  \<0.5d) the fourth 
  test may be        
  waived.            

                     •

                     • On the first increasing-load test, w[hen 30 % to 35 % of
                     ~~one-half~~]{.mark} [capacity is reached, pe]{.mark}rform a
                     shift test [with the 30 % to 35 % ~~one-half~~]{.mark}
                     [capacity]{.mark} load located in each quadrant. (Be careful to
                     avoid back-weighing.)

                     •

                     • On the third increasing-load test, perform a [shift test at
                     30 % to 35 % ~~one-half~~]{.mark} [capacity]{.mark} with
                     [the]{.mark} load located in each quadrant.
  ------------------ -----------------------------------------------------------------

+---+------------------------------------------------------------------+
| 6 |                                                                  |
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| . |                                                                  |
+---+------------------------------------------------------------------+
| 6 | Initial Type Evaluation Performance Test                         |
| 4 |                                                                  |
| . |                                                                  |
| 1 |                                                                  |
| . |                                                                  |
+---+------------------------------------------------------------------+
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|   |                                                                  |
|   |                                                                  |
+---+------------------------------------------------------------------+
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| d |                                                                  |
| . |                                                                  |
+---+------------------------------------------------------------------+
|   | • . . .                                                          |
+---+------------------------------------------------------------------+
|   | • On the first increasing-load test, when [30 % to 35 %          |
|   | ~~one-half~~]{.mark} capacity is reached, perf[orm a shift test  |
|   | with the 30 % to 35 % ~~one-half~~]{.mark} [capacity]{.mark}     |
|   | load located in each quadrant. (Be careful to avoid              |
|   | back-weighing.)                                                  |
+---+------------------------------------------------------------------+
|   | • On the second increasing-load test, perform a corner test at ¼ |
|   | capacity.                                                        |
+---+------------------------------------------------------------------+
|   | • On the third increasing-load test, perform a [shift test at    |
|   | 30 % to 35 % ~~one-half~~]{.mark} with test load located in each |
|   | quadrant.                                                        |
+---+------------------------------------------------------------------+

**Agenda Item 8:** Level Indicating Means -- Out-of-Level Test

**56. Level-Indicating Means -- Portable Scales**

Code Reference: S.2.4.

Portable wheel-load weighers and portable axle-load scales intended for
law enforcement must weigh accurately when placed out-of-level by
5 percent[[\*]{.mark}]{.underline} (approximately 3 degrees).

A portable scale which is intended to be moved must either be equipped
with a readily observable level-indicating means (typically a bubble
level) or the scale must still weigh accurately when placed out-of-level
by 5 percent (approximately 3 degrees). Weighing accurately means the
results must be within acceptance tolerance.

[]{.mark}

[[\*Note: 5 percent refers to 5 percent slope/grade]{.underline}]{.mark}

  ------- --------------------- -------------------------------------------------------------
  63.4.   Out-of-Level Tests    
          (If Applicable)       

          If the scale is not   
          equipped with a       
          level-indicating      
          means, it must be     
          tested in an          
          out-of-level          
          condition to          
          determine compliance  
          with paragraph S.4.   
          Leveling-Indicating   
          Means.                

          63.4.1.               Place one side of the scale [5 percent\* (approximately
                                3 degrees)~~3 degrees (or 5 percent)~~]{.mark} out-of-level
                                with respect to the width axis of the scale. Zero the scale.
                                Conduct a shift test^1^ and increasing and decreasing load
                                tests.

          63.4.2.               Place the opposite side or the scale out-of-level, zero, and
                                repeat tests.

          63.4.3.               Place the front of the scale [5 percent\* (approximately
                                3 degrees)~~3 degrees (or 5 percent)~~]{.mark} out-of-level
                                with respect to the length axis of the scale. Zero the scale
                                and conduct the shift, increasing, and decreasing load tests.

          63.4.4.               Place back of scale out-of-level, zero the scale, and repeat
                                tests. All test results must be within acceptance tolerances.
                                If the scale fails any of these tests, a level-indicating
                                means is needed.

                                [[\***Note:** 5 percent refers to 5 percent
                                slope/grade]{.mark}.]{.underline}
  ------- --------------------- -------------------------------------------------------------

71\. Performance and Permanence Tests for Type Evaluation of Electronic
Vehicle On-Board Weighing Systems

Out-of-Level Tests

A vehicle on-board weighing system shall operate within tolerance when
the weighing system is out-of-level up to [5 percent (approximately
3 degrees)[. Note that 5 percent refers to 5 percent
slope/grade]{.underline}]{.mark}. However, beyond the 3 degrees or
5 percent, if the accuracy is affected by out-of-level conditions normal
to the use of the device, the system shall be equipped with an
out-of-level sensor that inhibits the weighing operation when the system
is out-of-level to the extent that the accuracy limits are exceeded.

## Appendix B -- Meeting Attendees

+-------------+--------+-----------------------+-----------------------+
| ![](med     | **2007 |                       |                       |
| ia/image1.j | We     |                       |                       |
| peg){width= | ighing |                       |                       |
| "0.99027777 | Sector |                       |                       |
| 77777778in" | M      |                       |                       |
| height="    | eeting |                       |                       |
| 0.895138888 | Atten  |                       |                       |
| 8888889in"} | dees** |                       |                       |
|             |        |                       |                       |
|             | **Ma   |                       |                       |
|             | rriott |                       |                       |
|             | Rancho |                       |                       |
|             | C      |                       |                       |
|             | ordova |                       |                       |
|             | --     |                       |                       |
|             | Sacra  |                       |                       |
|             | mento, |                       |                       |
|             | Califo |                       |                       |
|             | rnia** |                       |                       |
|             |        |                       |                       |
|             | **Sep  |                       |                       |
|             | tember |                       |                       |
|             | 6 - 8, |                       |                       |
|             | 2007** |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Steven    |        | **Steven E. Cook**    | **Scott Henry**       |
| Beitzel**   |        |                       |                       |
|             |        | NIST, Weights &       | NCR Corporation       |
| Systems     |        | Measures Division 100 |                       |
| Associates, |        | Bureau Drive MS 2600  | 2651 Satellite        |
| Inc.        |        |                       | Boulevard             |
|             |        | Building 820/Rm 223   |                       |
| 1932        |        |                       | Duluth, GA 30096      |
| Industrial  |        | Gaithersburg, MD      |                       |
| Drive       |        | 20899-2600            | \(770\) 623-7543,     |
|             |        |                       | Fax: (770) 479-1174   |
| Li          |        | \(301\) 975-4003,     |                       |
| bertyville, |        | Fax: (301) 926-0647   | E-mail:               |
| IL 60048    |        |                       | scott.henry@ncr.com   |
|             |        | E-mail:               |                       |
| \(847\)     |        | stevenc@nist.gov      |                       |
| 367-6650,   |        |                       |                       |
| Fax: (847)  |        |                       |                       |
| 367-6960    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| sjbe        |        |                       |                       |
| itze1@syste |        |                       |                       |
| msassoc.com |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Sam       |        | **Scott Davidson**    | **Ken Jones**         |
| Boyd**      |        |                       |                       |
|             |        | Mettler-Toledo, Inc.  | Califol1lia Division  |
| California  |        |                       | of Measurement        |
| Division of |        | 1150 Dearborn Drive   | Standards             |
| Measurement |        |                       |                       |
| Standards   |        | Worthington, OH 43085 | 6790 Florin Perkins   |
|             |        |                       | Road, Suite 100       |
| 6790 Florin |        | \(614\) 438-4387,     | Sacramento, CA 95828  |
| Perkins     |        | Fax: (614) 781-7484   |                       |
| Road, Suite |        |                       | \(916\) 229-3052,     |
| 100         |        | E-mail:               | Fax: (916) 229-3015   |
| Sacramento, |        | s                     |                       |
| CA 95828    |        | cott.davidson@.mt.com | E-mail:               |
|             |        |                       | kjones@cdfa.ca.gov    |
| \(916\)     |        |                       |                       |
| 229-3021,   |        |                       |                       |
| Fax: (916)  |        |                       |                       |
| 229-3015    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| sboyd@      |        |                       |                       |
| cdfa.ca.gov |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Luciano   |        | **Darrell E.          | **Stephen Langford**  |
| Burtini**   |        | Flocken**             |                       |
|             |        |                       | Cardinal Scale        |
| Measurement |        | Mettler-Toledo, Inc.  | Manufacturing Co.     |
| Canada      |        |                       |                       |
|             |        | 1150 Dearborn Drive   | 203 East Daugherty,   |
| 2008 Matera |        |                       | P.O. Box 151          |
| Avenue      |        | Worthington, OH 43085 |                       |
|             |        |                       | Webb City, MO 64870   |
| Kelowna, BC |        | (614)438-4393, Fax:   |                       |
| V1V 1W9     |        | (614) 438-4355        | \(417\) 673-4631,     |
|             |        |                       | Fax: (417) 673-5001   |
| CANADA      |        | E-mail:               |                       |
|             |        | d                     | E-mail:               |
| \(250\)     |        | arrell.flocken@mt.com | slangford@cardet.com  |
| 862-6557,   |        |                       |                       |
| Fax: (250)  |        |                       |                       |
| 712-4215    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| bu          |        |                       |                       |
| rtini.lucia |        |                       |                       |
| no@ic.gc.ca |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Judy      |        | **Nathan Gardner**    | **Jean Lemay**        |
| Cardin**    |        |                       |                       |
|             |        | Oregon Department of  | Measurement Canada    |
| Wisconsin   |        | Agriculture           |                       |
| Dept. of Ag |        |                       | 151Tunney\'s Pasture  |
| & Consumer  |        | 635 Capitol Street NE | Driveway              |
| Protection  |        |                       |                       |
|             |        | Salem, OR 97301       | Ottawa, Ontario KIA   |
| PO Box      |        |                       | OC9                   |
| 8911, 2811  |        | \(503\) 986-4764,     |                       |
| Agriculture |        | Fax: (503) 986-4784   | CANADA                |
| Drive       |        |                       |                       |
| Madison, WI |        | E-mail:               | \(613\) 948-7279,     |
| 53708-8911  |        | nga                   | Fax: (613) 952-7331   |
|             |        | rdner@oda.state.or.us |                       |
| \(608\)     |        |                       | E-mail:               |
| 224-4945,   |        |                       | lemay.jean@ic.gc.ca   |
| Fax: (608)  |        |                       |                       |
| 224 4939    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| judy.ca     |        |                       |                       |
| rdin@datcp. |        |                       |                       |
| state.wi.us |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Milton    |        | **William G.          | **Paul A. Lewis,      |
| Carlin**    |        | GeMeiner**            | Sr.**                 |
|             |        |                       |                       |
| Kansas      |        | Union Pacific         | Rice Lake Weighing    |
| Department  |        | Railroad              | Systems               |
| of          |        |                       |                       |
| A           |        | 1400 Douglas Street,  | 230 West Coleman      |
| griculture, |        | Stop 0910             | Street                |
|             |        |                       |                       |
| Weights &   |        | Omaha, NE 68179-0910  | PO Box 272            |
| Measures    |        |                       |                       |
| Division    |        | \(402\) 544-6248,     | Rice Lake, WI         |
|             |        | Fax: (402) 501-0478   | 54868-2404            |
| PO Box      |        |                       |                       |
| 1           |        | E-mail:               | \(715\) 234-9171,     |
| 9282/Forbes |        | wgemeiner@up.com      | Fax: (715) 234-6967   |
| Field       |        |                       |                       |
| Building    |        |                       | E-mail:               |
| 282         |        |                       | plewis@ricelake.com   |
|             |        |                       |                       |
| Topeka, KS  |        |                       |                       |
| 66619-0282  |        |                       |                       |
|             |        |                       |                       |
| \(785\)     |        |                       |                       |
| 862-2415,   |        |                       |                       |
| Fax: (785)  |        |                       |                       |
| 862-2460    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| m           |        |                       |                       |
| carlin@kda. |        |                       |                       |
| state.ks.us |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Gary      |        | **Rick Harshman**     | **Todd R. Lucas**     |
| Castro**    |        |                       |                       |
|             |        | NIST                  | Ohio Dept. of         |
| California  |        |                       | Agriculture           |
| Division of |        | Building 820, 100     |                       |
| Measurement |        | Bureau Drive MS 2600  | 8995 East Main        |
| Standards   |        |                       | Street, Building 5    |
|             |        | Gaithersburg, MD      | Reynoldsburg, OH      |
| 6790 Florin |        | 20899-2600            | 43068                 |
| Perkins     |        |                       |                       |
| Road, Suite |        | \(301\) 975-3989,     | \(614\) 728-6290,     |
| 100         |        | Fax: (301) 926-0647   | Fax: (614) 728-6424   |
| Sacramento, |        |                       |                       |
| CA 95828    |        | E-mail:               | E-mail:               |
|             |        | rich                  | lucas@                |
| \(916\)     |        | ard.harshman@nist.gov | mail.agri.state.oh.us |
| 229-3049,   |        |                       |                       |
| Fax: (916)  |        |                       |                       |
| 229-3015    |        |                       |                       |
|             |        |                       |                       |
| Emai1:      |        |                       |                       |
| gcastro@    |        |                       |                       |
| cdfa.ca.gov |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+

+-------------+--------+-----------------------+-----------------------+
| ![](med     | **2007 |                       |                       |
| ia/image1.j | We     |                       |                       |
| peg){width= | ighing |                       |                       |
| "0.99027777 | Sector |                       |                       |
| 77777778in" | M      |                       |                       |
| height="    | eeting |                       |                       |
| 0.895138888 | Atten  |                       |                       |
| 8888889in"} | dees** |                       |                       |
|             |        |                       |                       |
|             | **Ma   |                       |                       |
|             | rriott |                       |                       |
|             | Rancho |                       |                       |
|             | C      |                       |                       |
|             | ordova |                       |                       |
|             | --     |                       |                       |
|             | Sacra  |                       |                       |
|             | mento, |                       |                       |
|             | Califo |                       |                       |
|             | rnia** |                       |                       |
|             |        |                       |                       |
|             | **Sep  |                       |                       |
|             | tember |                       |                       |
|             | 6 - 8, |                       |                       |
|             | 2007** |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **L. Edward |        | **Louis E. Straub**   |                       |
| Luthy**     |        |                       |                       |
|             |        | Fairbanks Scales,     |                       |
| Brechbuhler |        | Inc.                  |                       |
| Scales,     |        |                       |                       |
| Inc.        |        | 3056 Irwin Drive SE   |                       |
|             |        |                       |                       |
| 1424 Scale  |        | Southport, NC 28461   |                       |
| Street SW   |        |                       |                       |
|             |        | \(910\) 253-3250,     |                       |
| Canton, OH  |        | Fax: (910) 253-3250   |                       |
| 44706       |        |                       |                       |
|             |        | E-mai1:               |                       |
| \(330\)     |        | strauble@yahoo.com    |                       |
| 458-2424,   |        |                       |                       |
| Fax: (330)  |        |                       |                       |
| 471-8909    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| eluthy@b    |        |                       |                       |
| sscales.com |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Sonia     |        | **Russ Wyckoff**      |                       |
| Munoz**     |        |                       |                       |
|             |        | Oregon Dept. of       |                       |
| California  |        | Agriculture           |                       |
| Division of |        |                       |                       |
| Measurement |        | 635 Capitol Street,   |                       |
| Standards   |        | N.E.                  |                       |
|             |        |                       |                       |
| 6790 Florin |        | Salem, OR 97301-2532  |                       |
| Perkins     |        |                       |                       |
| Road, Suite |        | \(503\) 986-4767,     |                       |
| 100         |        | Fax: (503) 986-4784   |                       |
| Sacramento, |        |                       |                       |
| CA          |        | E-mail:               |                       |
| 95828-1812  |        | rwy                   |                       |
|             |        | ckoff@oda.state.or.us |                       |
| \(916\)     |        |                       |                       |
| 229-3017,   |        |                       |                       |
| Fax: (916)  |        |                       |                       |
| 229-3015    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| smunoz@     |        |                       |                       |
| cdfa.ca.gov |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Don       |        | **Jesus Zapien**      |                       |
| Onwiler**   |        |                       |                       |
|             |        | A&D Engineering, Inc. |                       |
| Nebraska    |        |                       |                       |
| Division of |        | 1756 Automation       |                       |
| Weights &   |        | Parkway               |                       |
| Measures    |        |                       |                       |
| 301         |        | San Jose, CA 95131    |                       |
| Centennial  |        |                       |                       |
| Mall South, |        | \(408\) 518-5114.     |                       |
| Box 94757   |        | Fax: (408) 635-2314   |                       |
| Lincoln, NE |        |                       |                       |
| 68509       |        | E-mai1:               |                       |
|             |        | jz                    |                       |
| \(402\)     |        | apien@andweighing.com |                       |
| 471-4292,   |        |                       |                       |
| Fax: (402)  |        |                       |                       |
| 471-2759    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| donwiler    |        |                       |                       |
| @agr.ne.gov |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Dan       |        |                       |                       |
| Parks**     |        |                       |                       |
|             |        |                       |                       |
| California  |        |                       |                       |
| Division of |        |                       |                       |
| Measurement |        |                       |                       |
| Standards   |        |                       |                       |
|             |        |                       |                       |
| 6790 Florin |        |                       |                       |
| Perkins     |        |                       |                       |
| Road, Suite |        |                       |                       |
| 100         |        |                       |                       |
|             |        |                       |                       |
| Sacramento, |        |                       |                       |
| CA 95828    |        |                       |                       |
|             |        |                       |                       |
| \(916\)     |        |                       |                       |
| 229-3018,   |        |                       |                       |
| Fax: (916)  |        |                       |                       |
| 229-3015    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| dparks@     |        |                       |                       |
| cdfa.ca.gov |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
|             |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+
| **Stephen   |        |                       |                       |
| Patoray,    |        |                       |                       |
| CAE**       |        |                       |                       |
|             |        |                       |                       |
| NCWM        |        |                       |                       |
|             |        |                       |                       |
| 1239        |        |                       |                       |
| Carolina    |        |                       |                       |
| Drive       |        |                       |                       |
|             |        |                       |                       |
| Tryon, NC   |        |                       |                       |
| 28782       |        |                       |                       |
|             |        |                       |                       |
| \(828\)     |        |                       |                       |
| 859-6178,   |        |                       |                       |
| Fax: (828)  |        |                       |                       |
| 859-6180    |        |                       |                       |
|             |        |                       |                       |
| E-mail:     |        |                       |                       |
| spatoray@   |        |                       |                       |
| mgmtsol.com |        |                       |                       |
+-------------+--------+-----------------------+-----------------------+

## Appendix C -- Attachments

## Attachment for Agenda Item 5

D. Force Transducers (load cells) to be Submitted for Evaluation

Force transducers (load cells) of essentially the same design may be
considered to form a family that can be listed on an NTEP CC. If force
transducers (load cells) within a family are made from different
materials, such as aluminum, alloy steel, or stainless steel, then all
material types must be submitted for evaluation. If the force
transducers (load cells) within a family are available in either a
4‑wire or 6‑wire version, then at least one 4‑wire version and one
6‑wire version must be evaluated. This policy applies to all
applications for new or amended NTEP Certificates of Conformance
received after January 31, 2007. This policy is non-retroactive for NTEP
Certificates of Conformance issued prior to February 1, 2007.

Under the Mutual Acceptance Arrangement (MAA) for the International
Organization of Legal Metrology (OIML), it is possible to obtain either
an NTEP CC or an OIML R 60 Certificate or both with a single evaluation.
NCWM is a utilizing participant under the MAA and as such will accept
test data from issuing participants within the MAA. Evaluations
performed by NTEP laboratories can only result in an NTEP CC. These
certificates can cover a family of force transducers (load cells) based
on the evaluation of representative samples from the family. In order to
determine which specific models of force transducers (load cells) are to
be used for evaluation, the following selection criterion shall be used:

> 1\. *[Evaluation of New Force Transducers (load cells) for NTEP
> Certificates Only]{.underline}*

Required Information

The following information is required from the manufacturer for review
and selection of sample force transducers (load cells):

a.  Properly completed request for evaluation

b.  A drawing of each capacity force transducer (load cell) within the
    family to substantiate that they are of the same basic design

c.  A determination of quality or accuracy class

d.  Maximum number of scale divisions requested (n-max)

e.  Minimum verification scale division requested (V-min)

f.  Force transducer (load cell) capacities

g.  The type(s) of material from which the force transducers (load
    cells) are made

h.  As applicable, outline dimensions and general description
    illustration of any special equipment (loading fixtures,
    interconnection boxes, etc.) intended to accompany the force
    transducers (load cells) submitted

i.  A complete set of test data on the force transducers (load cells)
    submitted for evaluation. (Test data is only required for those
    force transducers (load cells) submitted for type evaluation; test
    data for each capacity model in the family is not required.)

j.  The technology employed by the force transducer (load cell); e.g.
    strain gage (analog or digital), hydraulic, vibrating wire,
    piezoelectric, or other. Applicants for analog strain gage force
    transducers (load cells) must indicate on the application whether
    4‑wire or 6‑wire (or both) design force transducers (load cells) are
    included in the family.

Note: The manufacturer may market force transducers (load cells) with a
smaller number of scale divisions (n‑max) and/or with a larger V‑min
value than those listed on the approval certificate; however, the force
transducer (load cell) or accompanying documentation must be marked with
the appropriate n‑max and V‑min for which the force transducer (load
cell) may be used.

Selection Criteria

A. Selection of force transducers (load cells) from the family shall be
based on the following considerations:

1.  The selection of force transducers (load cells) shall be such that
    the number of force transducers (load cells) to be evaluated is
    minimized.

2.  Where force transducers (load cells) of the same capacity belong to
    different groups within the family, approval of the force transducer
    (load cell) with the best metrological characteristics (greatest
    n~max~, smallest v~min~) implies approval of the force transducers
    (load cells) with the lesser metrological characteristics. When a
    choice exists, the force transducers (load cells) with the best
    metrological characteristics shall be selected for the evaluation.

3.  Force transducers (load cells) with a capacity in between the
    capacities evaluated, as well as those with a capacity greater than
    the largest capacity model tested, but not over five times the
    largest capacity evaluated, are deemed to be certified.

4.  For any family of force transducers (load cells), the model with a
    capacity nearest the center of the range of capacities and with the
    best metrological characteristics shall be selected for evaluation.
    When the ratio of the largest capacity force transducer (load cell)
    within the group or family to the smallest capacity force transducer
    in the same group or family is 10:1 or less, a cell with a capacity
    nearest the center of the range shall be selected. The capacity of
    the selected cell shall not have a ratio greater than 5:1 in regard
    to the capacity of the force transducers (load cells) at the each
    extreme of the capacity range. If this is not possible, a second
    force transducer (load cell) must be selected for evaluation (see
    Item 5 below). If the selected mid-range capacity cell cannot be
    evaluated due to laboratory limitations, the NTEP representative
    should be contacted to select the specific model for evaluation.

5.  When the ratio of the largest capacity force transducer (load cell)
    within the group to the smallest capacity force transducer (load
    cell) within the same group or family significantly exceeds 10:1,
    then another force transducer (load cell) shall be selected for
    evaluation. The selected force transducer (load cell) shall have a
    capacity between 5 and 10 times that of the first force transducer
    (load cell) that was selected for evaluation. When no capacity meets
    this criteria, the selected force transducer (load cell) shall be
    that having the smallest capacity that exceeds 10 times that of the
    nearest smaller capacity force transducer (load cell) that has been
    selected for evaluation. Should the capacity of the selected cell
    exceed the capacity of the greatest capacity model in the family or
    group by a ratio greater than 10:1, an additional model must be
    selected for evaluation.

6.  If both 4‑wire and 6‑wire designs of force transducers (load cells)
    are included in the family, then at least one of the selected models
    for evaluation shall be of the 4‑wire design and at least one of the
    remaining models shall be of the 6‑wire design.

7.  If the family of force transducers (load cells) includes two or more
    types of material used for construction of the device, then at least
    one of the selected models for evaluation shall be of each type of
    material used for construction.

8.  If the family of force transducers (load cells) includes two or more
    means of environmental sealing (potting, welded cups, etc.), then at
    least one model using each sealing means shall be selected for
    evaluation.

9.  If the family of force transducers (load cells) includes two or more
    output levels (2 or 3 mV/V), then at least one model with each
    output level shall be selected for evaluation.

B. Examples of force transducer (load cell) model selection for
evaluation:

> a\. Force Transducer (load cell) Family A characteristics:

1.  Both stainless steel and alloy steel models

2.  2 mV/V and 3 mV/V outputs

3.  Bending beams in smaller capacities and shear beams in larger
    capacities

4.  4‑wire and 6‑wire designs

5.  n~max~ is 5000 on all models

6.  Potting or welded metal cup sealing variations

7.  All v~min~ values equal to 0.015 % of cell capacity

8.  All capacities in pounds:

> 500, 1000, 2000, 2500, 4000, 5000, 7500, 10 000, 15 000, 20 000

The following cell models would be selected for evaluation:

-   One - 500 lb stainless steel, potted, 3 mV/V, 4‑wire bending beam
    cell

-   One - 2500 lb alloy steel, potted, 2 mV/V, 4‑wire shear beam cell

-   One - 15 000 lb stainless steel, welded, 3 mV/V, 6‑wire shear beam
    cell

Note that Item 2 in Part A above is not applicable in this situation
since the metrological characteristics (n~max~ and v~min~ for all of the
models are equivalent.

Note that Item 3 in Part A above is met since the 20 000 lb model is
less than five times the capacity of the greatest capacity model
selected for evaluation (15 000 lb).

Note that Item 4 in Part A above is met since the 2500 lb capacity model
of force transducer (load cell) is the closest to the center and is able
to meet the requirements in both Item 4 and 5 and therefore was selected
for evaluation.

Note that Item 5 in Part A above is met since the ratio between the
capacities of the models selected for evaluation does not exceed five.

Note that Item 6 in Part A above is met by having at least one of the
models selected of a 4‑wire design and at least one of the models
selected of a 6‑wire design.

Note that Item 7 in Part A above is met by having at least one of the
models constructed from each type of materials used.

Note that Item 8 in Part A above is met by having at least one of the
selected models with each environmental sealing method employed within
the family.

Note that Item 9 in Part A above is met by having at least one of the
selected models with a 3 mV/V output and at least one with a 2 mV/V
output.

> b\. Force Transducer (load cell) Family B characteristics:

1.  Compression cells constructed from either alloy steel or stainless
    steel

2.  All cells are Class III L

3.  Cells from 10 000 lb to 75 000 lb have an n‑max of 7500 and cells
    from 50 000 lb to 200 000 lb have an n~max~ of 10 000

4.  All cells are 2 mV/V

5.  All cells have the same environmental sealing

6.  All cells have v~min~ values equal to 0.018 % of their capacity

7.  All cells are of 6‑wire design

8.  Cell capacities are:

> 10 000; 25 000; 50 000; 75 000; 100 000; 200 000

The following models would be submitted for evaluation:

-   One - 50 000 lb with an n‑max of 10 000 in stainless steel

-   One - 10 000 lb in alloy steel

Note that Item 2 in Part A above is met with the selection of the
50 000 lb model with an n~max~ of 10 000 since it has the best
metrological characteristics.

Note that Item 3 in Part A above is met with the selection of the
10 000 lb model. Selection of the 200 000 lb model could have taken
place but the 10 000 lb model was chosen because of the ease of testing.

Note that Item 4 in Part A above is met with the selection of the
10 000 lb model since it is within the 5:1 capacity ratio of the
50 000 lb model initially selected.

Note that Item 5 in Part A above is met with the selection of the
10 000 lb model since the ratio of its capacity to that of the 50 000 lb
model does not exceed 5:1.

Note that Item 6 in Part A above does not apply since all models are of
6‑wire design.

Note that Item 7 in Part A above is met with the selection of the
10 000 lb model in stainless steel and the 50 000 lb model in alloy
steel thus covering both types of material used for construction of the
force transducers (load cells) in the family.

Note that Item 8 in Part A above does not apply since all models use the
same means of environmental sealing.

Note that Item 9 in Part A above does not apply since all models use the
same output level of 2 mV/V.

> 2\. *[Evaluation of New Force Transducers (load cells) for OIML R 60
> Certificate or OIML R 60 Certificate and NTEP Certificate of
> Conformance under the DoMC]{.underline}*

Required Information

The information needed for an OIML R 60 evaluation is listed in OIML
Recommendation 60. If the manufacturer is seeking an NTEP Certificate of
Conformance for the force transducer (load cell) family or individual
model, the information shown in Section 1 above shall also be provided
along with a properly completed application for NTEP evaluation. All
NTEP requirements are to be met in this type of evaluation. The
manufacturer must make certain the issuing participant selected for the
evaluation of the force transducer(s) (load cell(s)) is aware that the
submittal is for both NTEP and OIML R 60. A completed application and
copies of all submitted data must be sent to NTEP. Once the evaluation
has been successfully completed, the issuing authority will provide an
OIML Evaluation Report that may then be used to secure an OIML R 60
Certificate. This report is also sent to NTEP. NTEP will evaluate the
OIML Evaluation Report and issue an NTEP Certificate of Conformance
based on this evaluation. Note that issuance of an NTEP Certificate of
Conformance may require the conduct of other tests not performed by the
issuing participant. If this happens, the costs of these tests are the
responsibility of the applicant.

Note: Should the force transducers (load cells) submitted fail to comply
with all OIML R 60 requirements and the manufacturer then seeks to
secure an NTEP Certificate of Conformance based on the OIML Evaluation
Report, additional testing may be required in order to fully determine
compliance of the device(s) with NTEP requirements. The costs for any
additional testing deemed necessary for completion of the NTEP review
will be the responsibility of the applicant.

Selection Criteria

Selection of the force transducers (load cells) for evaluation shall be
based on the OIML R 60 selection criteria as described in OIML
Recommendation 60.

> 3\. *[Amendment of an Existing NTEP Certificate of Conformance to Add
> Capacities and/or Change Metrological Characteristics in Conjunction
> with an OIML R 60 Evaluation Under the DoMC]{.underline}*

Required Information

The information needed for an OIML R 60 evaluation is listed in OIML
Recommendation 60. If the manufacturer is seeking to amend an existing
NTEP Certificate of Conformance for the force transducer (load cell)
family or individual model, the information shown in Section 1 above
shall also be provided along with a properly completed application for
NTEP evaluation. All NTEP requirements are to be met in this type of
evaluation.

Successfully completed, this type of evaluation will result in a test
report and test certificate that may be used to secure an amended OIML
R 60 Certificate. The test report will be reviewed by NTEP and, if the
appropriate criteria are met, a NEW NTEP Certificate of Conformance will
be issued. Note that the original NTEP Certificate of Conformance will
remain active and will not be amended. The new NTEP Certificate of
Conformance resulting from this evaluation will list the new capacities
added and/or the change in metrological characteristics. Note that the
appropriate NTEP Certificate of Conformance number must be marked on the
device in compliance with G‑S.1. Marking Requirements of NIST
Handbook 44.

Note: Should the force transducers (load cells) submitted fail to comply
with all OIML R 60 requirements and the manufacturer then seeks to only
amend the existing NTEP Certificate of Conformance based on the test
report, additional testing may be required in order to fully determine
compliance of the device(s) with NTEP requirements. The costs for any
additional testing deemed necessary for completion of the NTEP review
will be the responsibility of the applicant.

Selection Criteria

The proper models for evaluation will depend upon the nature of the
change or addition to be made. Because of this, NTEP personnel shall be
contacted and shall determine which model or models of force transducer
(load cell) are to be submitted.

> 4\. *[Amendment of an Existing NTEP Certificate of Conformance
> ONLY]{.underline}*

Required Information

The required information will depend upon the nature of the change being
made. If additional models of force transducers (load cells) are being
added to a family, then the same information and selection criteria as
listed in Section 1 above apply. If the change is to add another version
of the force transducer (load cell) listed on the current NTEP
Certificate of Conformance the nature of the change or addition must be
fully disclosed in the application.

Selection Criteria

The necessity of an evaluation to implement the requested change will
depend upon the nature of the change. In general, addition of new models
of force transducers (load cells) with capacities outside the 5:1 ratio
of those previously evaluated will require additional evaluation.
Addition of a 4‑wire design with no change in capacity will require an
evaluation while the addition of a 6‑wire design with no change in
capacity will not. The addition of models constructed from a different
material will require the evaluation of at least one model constructed
of the new material. NTEP personnel will inform you of what models, if
any, require evaluation after review of the application.

## Attachment for Agenda Item 6

**The Tare Work Group recommended adding the following definitions to
the Definitions (as amended by the S&T Committee) already in 2007 S&T
Agenda Item 320‑9**

[**Calculated weight (gross or tare\*) value.** Calculated sum or
difference of more than one measured weight value and/or calculated net
value.]{.underline} *(\* TARE WG Comment -- This new HB definition is
from the revised version of R 76 and is beyond what is currently
required by NTEP.)*

[**Tare-balancing mechanism.** A tare mechanism with an indication that
tare has been taken and without an indication of the tare value (weight)
when the instrument is loaded. A negative net weight is assumed to be
the tare value when the weighing instrument is unloaded.]{.underline}

[**Tare-weighing mechanism.** A tare-balancing mechanism that stores the
tare value and is capable of displaying (continuously or upon command)
or printing the value whether or not the instrument is
loaded.]{.underline}

[**Preset Tare.** A numerical value, representing a weight that is
entered into a weighing device (e.g., keyboard, recalling from stored
data, or entered through an interface) and is intended to be applied to
weighings without determining individual tares.]{.underline}

[**Preset Tare Mechanism.** A part of a weighing system for subtracting
a preset tare value from a gross or net weight value and indicating the
result of the calculation as a net weight. The weighing range for net
loads is reduced accordingly.]{.underline}

> [Types of preset tare mechanisms include:]{.underline}
>
> [- **Keyboard Tare.** The operation of keys on a keyboard; e.g., with
> a typical 10‑key keyboard with values 0 through 9, by the pushing of a
> key numbered 5, the number 5 is entered as a tare value.]{.underline}
>
> [- **Digital Tare.** By the repeated operation of a particular key,
> tare values are entered in amounts equal to the value of a scale
> division. For example, on a 25 lb x 0.01 lb scale, each time a
> specifically marked key is depressed; a tare is entered equal to
> 0.01 lb. If that key were depressed five times, the tare value would
> be equal to 0.05 lb.]{.underline}
>
> [- **Programmable Tare.** Preset (predetermined) tare values that are
> stored in memory for multiple transactions. They may be part of the
> product information on PLU (product look-up), preset product, or tare
> keys.]{.underline}
>
> [- **Stored Tare.** Preset (predetermined) tare values that are stored
> in memory for multiple transactions and are used predominately in
> vehicle scale applications.]{.underline}
>
> [- **Percentage Tare.** A preset tare value, expressed as a percentage
> (i.e., 5.6 %), that represents the percentage of tare material
> compared to the gross or net weight of the commodity. A percentage
> tare is one form of proportional tare.]{.underline}
>
> [- **Proportional Tare.** A preset tare value, automatically
> calculated by the scale, proportional to the gross weight indicated by
> the scale. A proportional tare can be a percentage tare or a fixed
> tare value proportional to a range of gross weights (i.e., a 10 g tare
> for gross weights between 0 and 2 kg, a 20 g tare for gross weights
> between 2 and 4 kg, etc.). A proportional tare is, therefore, not
> limited to being a percentage tare.]{.underline}

**The Tare Work Group recommends the following changes to Scales Code.**

**S.2. Design of Balance, Tare, Level, Damping, and Arresting
Mechanisms.**

> **S.2.3. ~~Tare~~ [Value of Tare Indication and Recorded
> Representations:]{.underline}**
>
> **~~*On any scale (except a monorail scale equipped with digital
> indications), the value of the tare division shall be equal to the
> value of the scale division.\**~~** The tare mechanism shall operate
> only in a backward direction (that is, in a direction of
> underregistration) with respect to the zero-load balance condition of
> the scale. *A device designed to automatically clear any tare value
> shall also be designed to prevent the automatic clearing of tare until
> a complete transaction has been indicated.\**
>
> *(Amended 1985)*
>
> *\[Note: On a computing scale, this requires the input of a unit
> price, the display of the unit price, and a computed positive total
> price at a readable equilibrium. Other devices require a complete
> weighing operation, including tare, net, and gross weight
> determination\]\**
>
> *\[\*Nonretroactive as of January 1, 1983\]*
>
> ***[S.2.3.1 Scale Interval.]{.underline}** -- The interval of a tare
> weighing mechanism shall be equal to the scale interval of the*
> [weighing device for any given load.]{.underline}
>
> *[(a)]{.underline} On any scale (except a monorail scale equipped with
> digital indications **[and multi-interval scales or multiple range
> scales when the value of tare is determined in a lower
> range]{.underline}**), the value of the tare division shall be equal
> to the value of the scale division.\**
>
> *\[\*Nonretroactive as of January 1, 1983\]*
>
> \(b\) **~~S.2.3.1.~~ Monorail Scales Equipped with Digital
> Indications. --** On a static monorail weighing system equipped with
> digital indications, means shall be provided for setting any tare
> value of less than 5 % of the scale capacity to within 0.02 % of scale
> capacity. On a dynamic monorail weighing system, means shall be
> provided to automatically maintain this condition.
>
> (Amended 1999)
>
> **[(Renumbered 200X)]{.underline}**
>
> ***[S.2.3.2. Accuracy. -- A tare weighing or balancing mechanism shall
> permit setting the indication to zero with an accuracy equal to or
> better than:]{.underline}***
>
> ***[± 0.25 d for electronic weighing devices and any weighing device
> with an analog indication,]{.underline}***
>
> ***[± 0.5 d for mechanical weighing devices with a digital indication
> (e.g., weighbeams with only notched poises and no sliding
> poises).]{.underline}***
>
> ***[On a multi-interval scale, d shall be replaced by d1 (division
> value of the first weighing segment).]{.underline}***
>
> ***[S.2.3.3. Operating Range. -- The tare mechanism shall be such that
> it cannot be used at or below its zero effect or above its maximum
> indicated effect.]{.underline}***
>
> ***[On a single or multiple range scale, the maximum tare capacity can
> not exceed that maximum capacity of the highest weighing
> range.]{.underline}***
>
> ***[On a multi-interval scale, the maximum tare capacity can not
> exceed that maximum capacity of the first weighing
> segment.]{.underline}***
>
> ***[S.2.3.4. Visibility of Operation. -- Operation of the tare
> mechanism shall be visibly indicated on the instrument. In the case of
> instruments with digital indication, this shall be done by marking the
> indicated net value with the word "NET" or the symbol
> "N."]{.underline}***
>
> ***[Note: NET may be displayed as "NET," "Net," or
> "net."]{.underline}***
>
> ***[Note: If a scale is equipped with an indicator that allows the
> gross value to be displayed temporarily while a tare mechanism is in
> operation, the "NET" symbol shall disappear while the gross value is
> displayed.]{.underline}***
>
> **[S.2.3.5. Subtractive Tare Mechanism. -- After any tare operation
> and while tare is in effect, an indicating or recording element shall
> not display nor record any values when the gross load (not counting
> the initial dead load that has been canceled by an initial
> zero-setting mechanism) is in excess of 105 % of scale capacity after
> tare has been taken.]{.underline}**
>
> *(Tare WG Recommenation: Insert into paragraph S.1.7. (a) Capacity
> Indication "Flashing weight values are not acceptable as and overload
> indication."*
>
> [**S.2.3.6. Semi-automatic or Automatic Tare\* Balancing or Weighing
> Mechanisms.** -- **These mechanisms shall be operable or accessible
> only by a tool outside of and separate from this mechanism or it shall
> be enclosed in a cabinet, or it shall be operable only when the
> indication is stable within:**]{.underline}
>
> **[(a) ± 3 scale divisions for scales of more than 2000 kg (5000 lb)
> capacity in service prior to January 1, 1981, and for all axle load,
> railway track, and vehicle scales; or]{.underline}**
>
> **[(b) ± 1 scale division for all other scales.]{.underline}**
>
> **[\* Automatic Tare Mechanisms are not permitted for direct sales to
> the public.]{.underline}**
>
> [**S.2.3.7. Combined Zero-setting and Tare-balancing Mechanisms (0/T
> Key)**. **-- (TWG recommends deleting S.2.1.6. Combined Zero-setting
> and Tare-balancing Mechanisms (0/T Key) in order to keep all tare
> requirements together). Scales not intended to be used in direct sales
> to the public may be equipped with a combined zero and tare function
> key, provided that the device is clearly marked as to how the key
> functions. If the semi-automatic zero-setting mechanism and the
> semi-automatic tare-balancing mechanism are operated by the same key,
> the following apply at any load:**]{.underline}

1)  **[After zero/tare setting the effect of accuracy of the zero
    setting shall be not more than ± 0.25 d.]{.underline}**

2)  **[A "center-of-zero" condition shall either automatically be
    maintained to ± 0.25 scale division or less, or have an auxiliary or
    supplemental "center-of-zero" indicator that defines a zero‑balance
    condition to ± 0.25 of a scale division or less.]{.underline}**

3)  **[A zero-tracking mechanism, if equipped, shall operate only
    when:]{.underline}**

    1.  **[the indication is at zero, or at a negative net value
        equivalent to gross zero, and]{.underline}**

    2.  **[the weight indication is stable.]{.underline}**

4)  **[The scale must also be clearly marked on or adjacent to the
    weight display with the statement "Not for Direct
    Sales."]{.underline}**

> **[S.2.3.8. Consecutive Tare Operations. -- Repeated operation of a
> tare mechanism (including preset tare) is permitted. If more than one
> tare mechanism is operative at the same time, tare weight values shall
> be clearly designated when indicated or printed.]{.underline}**
>
> **[S.2.3.9. Indication and Printing of Weighing
> Results.]{.underline}**

a)  **[Gross weight values may be printed without any designation or by
    complete word or symbol. For a designation by a symbol, only "G" is
    permitted.]{.underline}**

b)  **[If only net weight values are printed without corresponding gross
    or tare values, they may be printed without any designation or by a
    complete word or symbol. The complete word or symbol "N" shall be
    used to designate a net weight. This applies also where
    semi-automatic zero-setting and semi-automatic tare balancing are
    initiated by the same key.]{.underline}**

c)  **[Gross, net, or tare values determined by a multiple range
    instrument or by a multi-interval instrument need not be marked by a
    special designation referring to the (partial) weighing
    range.]{.underline}**

d)  **[If net weight values are printed together with the corresponding
    gross and/or tare values, the net and tare values shall be
    identified at least by the corresponding symbols "N" and "T" or by
    complete words.]{.underline}**

e)  **[If net weight values and tare values determined by different tare
    mechanisms are printed separately, they shall be suitably
    identified.]{.underline}**

f)  **[When gross, net, and tare values are printed together, one of
    these values may be calculated from two actual determinations of
    mass. In the case of a multi-interval device the calculated weight
    gross or tare value may be printed with a smaller scale
    interval.]{.underline}**

g)  **[The printout of a calculated gross or tare weight value shall be
    clearly identified. This should be done by the symbol "C" in
    addition to the symbols mentioned above, if applicable, or by
    complete words.]{.underline}**

> *TARE WG Comment: The requirements in f) and g) are from the revised
> version of R 76 and is beyond what is currently required by HB 44 and
> NTEP.*
>
> **[S.2.4. Preset Tare Mechanism.]{.underline}**
>
> **[S.2.4.1. Modes of Operation. -- A preset tare mechanism may be
> operated together with one or more tare devices provided
> that:]{.underline}**

-   **[the preset tare mechanism complies with paragraph S.2.3.8.
    Consecutive Tare Operations., and]{.underline}**

-   **[a preset tare operation cannot be modified or cancelled as long
    as any tare mechanism operated after the preset tare operation is
    still in use.]{.underline}**

-   **[a preset tare associated with a price look-up (PLU) shall be
    automatically cancelled at the same time a PLU is
    cancelled.]{.underline}**

> **[Preset tare may operate automatically only if the preset tare value
> is clearly identified with the load to be measured (e.g., part of the
> product look-up information).]{.underline}**
>
> **[S.2.4.2 Indication of Operation. -- Operation of the preset tare
> device shall be visibly indicated on the instrument. In the case of
> instruments with digital indication, this shall be done by marking the
> indicated net value with the sign "NET," "Net," or "net." If an
> instrument is equipped with a device that allows the gross value to be
> displayed temporarily while a tare device is in operation, the "NET"
> symbol shall disappear while the gross value is displayed. It shall be
> possible to temporarily indicate the preset tare value.]{.underline}**
>
> **[Paragraph S.2.3.9. Indication and Printing of Weighing Results.
> applies accordingly provided that the calculated net value is printed
> and at least the preset tare value is printed, with the exception
> of:]{.underline}**

1.  **[a class II, or a class III instrument with a maximum capacity not
    greater than 100 kg used in direct sales to the public,
    or]{.underline}**

2.  **[including price computing scales, or]{.underline}**

3.  **[nonautomatic weigh/price labeling scales.]{.underline}**

-   **[preset tare values are designated by the symbol "PT"; however, it
    is permitted to replace the symbol "PT" with complete
    words.]{.underline}** *(TARE WG Comment -- This requirement is from
    the revised version of R 76 and is beyond what is currently required
    by HB 44 and NTEP. The Tare WG added the class and capacity
    exception since they felt that the need for providing the additional
    type of tare information is greater for larger capacity scales and
    for vehicle scale applications where preset tares are not allowed by
    some jurisdictions.)*

**[Note: Paragraph 2.4.2. also applies to weighing devices with a
combined semi-automatic zero-setting device and a semi-automatic
tare-balancing device operated by the same key.]{.underline}**

[^1]: Recommended changes to Publication 14 are indicated in [shaded,
    ~~strike out~~, and [underlined text]{.underline}]{.mark}.