NATIONAL BUREAU OF STANDARDS REPORT

10 551

PROGRAM OF LEGAL METROLOGY AND SCIENTIFIC METROLOGY

QUITO, ECUADOR

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
*> V , -

NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards 1 was established by an act of Congress March 3, 1901. Today,

in addition to serving as the Nation’s central measurement laboratory, the Bureau is a principal

focal point in the Federal Government for assuring maximum application of the physical and

engineering sciences to the advancement of technology in industry and commerce. To this end

the Bureau conducts research and provides central national services in four broad program

areas. These are: (1) basic measurements and standards, (2) materials measurements and

standards, (3) technological measurements and standards, and (4) transfer of technology.

The Bureau comprises the Institute for Basic Standards, the Institute for Materials Research, the

Institute for Applied Technology, the Center for Radiation Research, the Center for Computer

Sciences and Technology, and the Office for Information Programs.

THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United

States of a complete and consistent system of physical measurement; coordinates that system with measurement systems of other nations; and furnishes essential services leading to accurate and

uniform physical measurements throughout the Nation’s scientific community, industry, and commerce. The Institute consists of an Office of Measurement Services and the following technical

divisions:Applied Mathematics—Electricity—Metrology—Mechanics—Heat—Atomic and Molecular Physics—Radio Physics -—Radio Engineering -—Time and Frequency - —Astrophysics - —Cryogenics.

THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to im- proved methods of measurement standards, and data on the properties of well-characterized

materials needed by industry, commerce, educational institutions, and Government; develops,

produces, and distributes standard reference materials; relates the physical and chemical properties of materials to their behavior and their interaction with their environments; and provides

advisory and research services to other Government agencies. The Institute consists of an Office of Standard Reference Materials and the following divisions: Analytical Chemistry—Polymers—Metallurgy—Inorganic Materials—Physical Chemistry.

THE INSTITUTE FOR APPLIED TECHNOLOGY provides technical services to promote

the use of available technology and to facilitate technological innovation in industry and Government; cooperates with public and private organizations in the development of technological

standards, and test methodologies; and provides advisory and research services for Federal, state, and local government agencies. The Institute consists of the following technical divisions and

offices: Engineering Standards—Weights and Measures — Invention and Innovation — Vehicle

Systems Research—Product Evaluation—Building Research—Instrument Shops—Measurement Engineering—Electronic Technology—Technical Analysis.

THE CENTER FOR RADIATION RESEARCH engages in research, measurement, and application of radiation to the solution of Bureau mission problems and the problems of other agencies and institutions. The Center consists of the following divisions: Reactor Radiation—Linac Radiation—Nuclear Radiation—Applied Radiation. THE CENTER FOR COMPUTER SCIENCES AND TECHNOLOGY conducts research and

provides technical services designed to aid Government agencies in the selection, acquisition,

and effective use of automatic data processing equipment; and serves as the principal focus

for the development of Federal standards for automatic data processing equipment, techniques,

and computer languages. The Center consists of the following offices and divisions: Information Processing Standards—Computer Information — Computer Services — Sys- tems Development—Information Processing Technology.

THE OFFICE FOR INFORMATION PROGRAMS promotes optimum dissemination and

accessibility of scientific information generated within NBS and other agencies of the Federal government; promotes the development of the National Standard Reference Data System and a system of information analysis centers dealing with the broader aspects of the National Measure- ment System, and provides appropriate services to ensure that the NBS staff has optimum accessibility to the scientific information of the world. The Office consists of the following

organizational units: Office of Standard Reference Data—Clearinghouse for Federal Scientific and Technical

Information —Office of Technical Information and Publications—Library—Office of Public Information—Office of International Relations.

1 Headquarters and Laboratories at Gaithersburg. Maryland, unless otherwise noted; mailing address Washington, D.C. 20234.

- Located at Boulder, Colorado 80302.

1 Located at 5285 Port Royal Road, Springfield, Virginia 22151.
NATIONAL BUREAU OF STANDARDS REPORT

NBS PROJECT

40 4 7 58 5 NBS REPORT

10 55 1

PROGRAM OF LEGAL METROLOGY AND SCIENTIFIC METROLOGY

QUITO, ECUADOR

by

Thomas IVL Stabler

0 ffi ce of Weights and Measures

National Bureau of Standards

and

Luis F urresta

Instituto Ecuatoriano de Norm ali zacion

Quito, Ecuador

IMPORTANT NOTICE NATIONAL BUREAU OF ST

for use within the Government, and review. For this reason, thi whole or in part, is not author Bureau of Standards, Washingtc

the Report has been specifically

Approved for public release by the

Director of the National Institute of

Standards and Technology (NIST)

on October 9, 2015.

;s accounting documents intended

subjected to additional evaluation

listing of this Report, either in

i Office of the Director, National

y the Government agency for which

opies for its own use.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

INDEX

PART I PROGRAM OF LEGAL METROLOGY Page

1. Objectives 1 2. Program Description 1-3

3. Law and Regulations 3-4

4. Organization 5-6

5. Personnel Development 7

6. Field Standards and Test Equipment 8-10

7. Public Education 10-

8. Program Progression 11-12

PART II PROGRAM OF SCIENTIFIC METROLOGY

1. Location 13

2. Standards and Instruments 13

3. Laboratory Services 13

4. Personnel 14

5. Technical Training 14

6. Laboratory Auditing Program 14-15

7. Metrology Laboratory Program Expansion 15-16

8. Specifications for Metrology Laboratory

Environment 16-17

9. Standards and Instruments, Specifications 17-19

10. General Laboratory Equipment 19

11. Standards and Equipment Costs 20

12. Purchase Priority Recommendations 21

13. Metrology Laboratory Plan 22

14. References 23
'
INTRODUCTION

In Ecuador as in all countries of the world, measurements are made

at every level of trade and commerce; in the purchasing of raw materials

,

during manufacturing processes, distribution, and in the sales to users. In

agricultural production, manufacturing, importation and exportation, and

at the final consuming level, accurate measurements are essential so that

buyer and seller receive just compensation for goods and services. This is

of particular concern in industrializing countries.

An effective program of metrology includes the basic law and

regulations, primary reference standards, secondary laboratory standards,

field standards, capable administrators and well- trained laboratory and

field personnel. These elements must be coordinated so that the industry,

agriculture, the national government and the general public have confidence

in the nationwide measurement system.
m

-
PART I PROGRAM OF LEGAL METROLOGY

1 . Objectives

The program objectives include the enactment of a law of legal

metrology for the Republic of Ecuador, the development of a functional

organization, and procurement of necessary physical standards of mass

(weight), length, and volume. Together, these ingredients will be used to

build a ten year program permitting gradual conversion to the Metric System

regulatory control of commercial weighing and measuring equipment and

packaged commodities.

Program objectives can be achieved only through effective enforcement of the law. The goals should include:

a. Uniform system of weights and measures in use throughout the

country

.

b, High level of accuracy in commercial measurement.

2 . Program Description

The first priority is the enactment of a national law for metrology.

The law will establish the units of weights and measures, the primary

reference standards, and the authority for inspecting and testing packages

and commercial equipment (Reference l) . At this time, reasonable regulations

should be adopted that set forth performance requirements for commercial

weighing and measuring devices (Reference 2) and for packages (Reference 3).
2 .-

The second priority is the establishment of the Laboratory for

Scientific Metrology. The Laboratory will serve as the measurement center

for Ecuador and will house the National Reference Standards. All field

standards used in law enforcement activities (testing of scales, meters,

etc.) shall be traceable to the National Standards, and the National Standard

to the International Standards held in Paris, France. (The program and

organization for the Laboratory for Scientific Metrology are presented in

Part II)

.

The third priority is to establish an organization with personnel to

enforce the law and regulations

.

It is proposed that the program of legal metrology be implemented

in two 5 year stages, recognizing the conditions that exist: very little

effective enforcement, and the existance of many traditional and foreign

units in the market place.

First Stage (1-5 years)

a. Enactment of the Law and Regulations.

b. Establishment of the Laboratory of Scientific Metrology.

c. Establishment of Department of Legal Metrology.

d. Training of Director and Deputy Director.

e

.

. Procurement of field standards and test equipment.

f. Limited program of Law Enforcement.
3 .-

g. Extensive educational program.

h.. Initial conversions to the Metric system.

Second Stage (6-10 years)

a. Additional field personnel.

b. Procurement of additional field standards and test equipment.

c. Expansion of law enforcement program.

d. Packager and device owner -operator responsible for accuracy

under the law.

e. Completion of conversion to the Metric System.

3 . Law and Regulations

The recommended law establishes the units of weight and measure

to be used in commerce in Ecuador, and sets the standards that are to

serve as the National Reference Standards. All commercial transactions

should be traceable to the National Reference Standards through accurate

weighing and measuring equipment tested with certified field standards.

(if the chain of accuracy (reference) is broken, very little is known about

measurements)

.

Performance requirements for commercial weighing and measuring

equipment are well established and are appropriate for most metric weights

and measures

.

An important regulation is the Registration of Service Companies and

Mechanics. (Reference 4). This provides for the installation and maintenance
4 .-

of commercial equipment by authorized service companies and personnel

only, and prohibits service by unqualified mechanics with inadequate and

inaccurate test weights and measures. All test weights and measures used

by service personnel must be approved annually by the Laboratory for

Scientific Metrology (INEN) . Incompetent service is ground for the

revocation of a license.

The regulation pertaining to packages is important to the standarizatio

of packaging and labeling. In addition, standards should be established

for sizes of consumer packages on an individual product or product

category basis. Standard package sizes enable the general public to make

value comparisons when unit prices are not displayed, and negates the

necessity for packagers to compete on a quantity basis.

In summary, the law and regulations should include:

a. Basic Law for Legal Metrology (Reference l)

b. Regulation for Commercial Weighing and Measuring Equipment

(Reference 2)

c. Regulation for Packaging and Labelling (Reference 3)

d. Regulation for Registration of Service Companies and

Mechanics (Reference 4)

Procedures for checking packages for net content are found in NBS

Handbook 67 (Reference $) and should be used by the official in the testing

program. This procedure provides for variations in packaged quantities and

establishes a standarized sampling procedure and testing technique.
5. -

4 . Organization

The Department of Legal Metrology should be part of the Ministry of

Production , with complete responsibility for the enforcement of the National

Law.

The staff for the Department consists of a Director, Deputy Director,

and field personnel: Field Metrologist I (Trainee) and Field Metrologist II.

The Director is responsible for the administration of the over- all

program: the hiring of personnel, allocation of resources, and the broad

program of public education.

The Deputy Director is responsible for coordination of the enforcement

program, conduct of special investigations, technical training and general

supervision of field metrologists

.

The Metrologist I (Trainee) position should be filled by graduates

from a technical high school. Because of the technical nature of legal

metrology the period of training should be not less than one year. During

this period, the Metrologist I should work under the close supervision of

the Deputy Director and an experienced Metrologist II. It is understood

that, qualified personnel are attracted by good salaries and challenging

positions; consequently, the salary scale must be sufficiently attractive

for trainees to provide long term job stability. (Four years of on-the-job

training is required in most cases for the development of a technically

competent, professional field metrologist).

Metrologist II is a position for well qualified field personnel who

have completed the basic training. A Metrologist II works under the general
supervision of the Deputy Director; yet, can perform his duties while

using independent judgment, in keeping with the law, regulations, and

departmental policy.

In addition to the professional staff, the Department will require a supporting office staff for stenographic assistance, i. e. , typing, filing of reports, etc.
7. -

5. Personnel Development

The Director and Deputy Director should receive training at the

National Bureau of Standards and at State weights and measures departments

in the U. S .A. A period of six months should be considered for the study of

weights and measures administration and technical aspects of commercial

device testing and package control.

Following this six month period, four Metrologist I field personnel

should begin training in Quito under the supervision of the Deputy Director.

Initial instruction should include the law, regulations, and test procedures.

During the first six months of the training period for metrologists all field

testing should be under close supervision of the Deputy Director. Upon

completion of the first year, four additional Metrologists I should begin

training following a similar program of instruction given the previous group.

Metrologists II can provide assistance in field training.

Following the first year training program, technical education should

be planned on an annual basis and involve not only metrologists but also

weights and measures industry— service company personnel, such as scale

and meter mechanics, and packaging industry representatives. A five day

program will provide considerable technical information and create a cooperative

atmosphere between industry representatives and Department personnel and

certainly an increase in understanding of program requirements and objectives.
8. -

6 . Field Standards and Test Equipment

At the beginning of the training period for Metrologists I* each person

should be equipped with a set of field standards which include the following:

Mass Standards

20 kg, cast iron, 6 ea. . NBS Class F

Set, 22 wts . , 1 kg to 500 mg NBS Class F

Package checking scale, 10 kg capacity

Length Standards

Steel tape, 30 M x 1 mm

Tape Rule, 3 M x 1 mm

Volume Standards

Field Standard Measure, 20 liters, adjustable scale

Field Standard Measures, flasks, 1 liter to 10 ml

With effective coordination of the testing program it may be possible

to exchange field standards between metrologists so that complete sets are

not necessary in every instance, particularly after the staff has grown to eight

metrologists and after some have developed specialties such as package

checking, meter testing, large scale testing, etc. It should be remembered

that the metrologist is responsible for his standards and their maintenance,

and that accuracy and appearance of field standards are paramount to a

successful legal metrology program.
9. -

After the program's second year the addition of large test equipment

should be considered. The testing of commercial devices may include flow

meters and medium capacity dormant scales. For these devices, special test

equipment and standards are necessary:

Prover, 4 00 liter capacity, adjustable reading scale, pump return,

trailer mounted.

Test Truck, 2500 kg capacity, ten 250 kg field standard weight,

cart hoist

At the end of five years, arrangements should be made for the

purchase of a large capacity scale test truck. This truck carries a 10,000 kg

standard weight load in 1,000 kg units, and is used for testing vehicle

scales and other large capacity scales. The use of standard weight test

loads to 10,000 kg, and greater is imperative if weighing is to be accurate

at high capacities.

A cost estimate of these standards and test equipment will be

furnished by NBS upon request.

Another important consideration is transportation for the professional

staff. The Director, Deputy Director, and each metrologist should have a

vehicle for transporting standards and equipment, and for mobility that is

essential in weights and measures law enforcement. The coordination of

tests and the requirement for efficient use of man power and equipment make

the availability of vehicles a high priority consideration.
10 . -

The maintenance of standards and test equipment must be a

regularly budgeted item. Repairs to equipment, including painting and general

maintenance, should be conducted on an annual basis, or more often as

necessary. In addition, all field standards must be returned at least annually

to the Laboratory for Scientific Metrology for recalibration and certification.

This is required by the Law for Legal Metrology.

7 . Public Education

The Director will be in charge of a broad program of public education

to run concurrently with the first and second five year programs of legal

metrology. Every level of government, industry and the general public should

benefit from an intensive and extensive information dissemination effort and

should receive publications explaining the new law, metric system and

program of legal metrology. Television, newspapers, and radio are effective

media for the. dissemination of public information.

Industry, manufacturers, packagers, commercial equipment owners

and operators should be made aware of the benefits of legal metrology and also

of their responsibilities under the law. Meetings with business and industry

representatives are helpful in the effort to gain general acceptance of the

program of legal metrology—to transcend from " educational- enforcement" , or

service program, to a law enforcement program where the device owner or

operator is responsible for the accuracy of the equipment. An effective

educational program can result in the smooth evolution of legal metrology.
11 . -

8 . Program Progression

Following enactment of the Law for Legal Metrology and initial

training period for the Director and Deputy Director, a limited law

enforcement program should be undertaken that serves two primary

functions: l) Technical training for the metrologists; and, 2) educational

information for the equipment owners ,< operators and service personnel.

Gasoline pumps and small capacity "scales should be the first classes

of devices to be tested. They are readily available in the large urban areas

and are clearly visible by the public. Owner- operator responsibility for

device accuracy should^be emphasized. Following the educational service

program, commercial equipment found to be inaccurate to the advantage of

the owner (seller), should not be permitted to continue in operation until

repaired or adjusted.

A package checking program can also be included in the early stages

of the testing program. Random packaged quantities of foods prepared for

sale in the super market can be checked for net weight. Food and non-food

packages prepared by industry usually uniform in quantity of contents, can

be tested at the factory or packing house.

The next category of equipment to be tested should include medium

capacity portable and dormant scales. These are in wide use and range in

capacity from approximately 500 kg to 2 , 500 kg

.
12 . -

As the staff is increased and as other resources become available

other areas of enforcement should be administered. In the selection of

areas for law enforcement and intthe establishment of priorities, economic

impact of the testing program should be the primary consideration.
13 . - PART II PROGRAM OF SCIENTIFIC METROLOGY

1 . Location

The Laboratory for Scientific Metrology is located at INEN (Instituto

Ecuatoriano de Normalizacion) and provides the necessary controlled

environment for the maintenance of the Primary Reference Standards of Ecuador

and other standards and instruments employed in precise calibrations and tests.

(Reference Metrology Laboratory Drawing ).

2 . Standards and Instruments

The standards and instruments include primary standards of mass ,

length, volume, precision balances, and other equipment used in metrology.

(Reference List of Standards).

3 . Laboratory Services

The first objective of the metrology laboratory program is the establishment and maintenance of the Primary Reference Standards of Ecuador, In

addition, the laboratory provides measurement services to government,

universities, commerce, and industry at a practical level—to satisfy the

requirements of quantity and quality control in production, inventory control,

accuracy of manufacturing tolerances, etc. The standards provide the legal

reference for contracts based upon weight and measure, and serve as the

basis for commercial transactions—including imports and exports —at all

levels of production and distribution.
4 . Personnel

The laboratory staff includes a Laboratory Metrologist and Technology

The Metrologist, in addition to calibration and general laboratory administrativ

responsibilities, provides metrological assistance and consulting services to

government agencies , universities, business, commerce, and industry. The

Technologist conducts tests and calibrations at the direction of the metrologist

he is well qualified in the employment of acceptable techniques in the care and

maintenance of primary standards and laboratory instruments.

5 . Technical Training

The Metrologist and Technologist are to receive training in Basic

Laboratory Metrology (80 hours), at INEN, at the time of installation of

standards and instruments. At the completion of the basic study, the Metrologi:

and Technologist will qualify for training in Intermediate Laboratory Metrology

(4 0 hrs) conducted at INEN or at the National Bureau of Standards (NBS)

,

Washington, D.C. Advanced Metrology is available at NBS each year in

two or three week programs. Participation in the advanced program of

continued study should be considered upon completion of the intermediate

level of instruction. (No fees have been established for training at NBS).

6 . Laboratory Auditing Program

The Office of Weights and Measures at NBS conducts a Laboratory

Auditing Program (LAP) designed to monitor standards, instruments, laboratory
15 . -

environment, laboratory techniques and procedures; this also serves as a means for continued professional development of metrologists and technologists.

Thirty state metrology laboratories cooperate in LAP and it is recommended that

INEN participate also. (No fees have been established for participation).

Through the exercises (laboratory problems) current calibration of standards is

maintained and performance of instruments evaluated. Participating

laboratories receive a "certificate" from NBS attesting to the traceability of

standards and participation in LAP. Satisfactory participation—qualification

for a "certificate" —consists of the completion of six exercises at the local

metrology laboratory per year (1 every 2 months) and regular submission of

data to NBS. The NBS evaluation and recommendations are sent by mail to

the participating laboratories. Enrollment in LAP is on an annual basis.

7 . Metrology Laboratory Program Expansion

The development of the basic standards program should follow in

this sequence;

a. Laboratory facility—all construction should be completed prior

to installation of any standards or instruments.

b. Installation of Standards by NBS--all installations to be

supervised by NBS engineer.

c. Basic laboratory Metrology- -training of Metrologists and

Technologist in basic laboratory techniques and procedures at the time of

standards installation.
16. -

d. Laboratory Auditing Program—INEN enrollment in LAP.

e. Intermediate Laboratory Metrology—forty hours training, at

INEN or NBS, in more advanced calibration techniques and computations.

f. Advanced Laboratory Metrology—conducted at NBS laboratories,

two to three weeks, of continuation studies.

g. New measurement capability—expansion into new measurement

areas; ie. temperature, gage blocks, etc.

8 . Specifications for Metrology Laboratory Environment

a . Tempera ture

Temperature control; 20° C T C

b. Vibration

Provide isolated footings (at floor level) for the 3 0 kg balance,

Russell Balance, and balance table.

c. Air Flow

Air flow control: If used, air conditioners should be equiped with

adjustable leuvers to control direction and quantity of air flow.

d. Relative Humidity

Maximum relative humidity 5 0%.

e. Illumination

Illumination: 100 foot candles at bench height

f . Dust Free Conditions

Cracks around doors to be sealed. Provide vinyl- asbestos floor tile

g . Access
17 . -

Provide locks for Metrology Laboratory doors. Access to laboratory

should be limited to the Director, Metrologist, and Technologist,

h. Standards Display

Provide a dust- free cabinet for mass standards, glass front, shelves

4.0 M (linear) x 0.40 M. (See laboratory drawing). Cover shelves

with lint- free, soft material.

9. Standards and Instruments Specifications

Mass Standards

a. 30 kg to 1 mg in 5-3- 2-1 series,

1 kg and 1 mg duplicated (33 wts.)

b. 200 kg, stacking; lifter rod , extender rod, eye bolt (2 each)

c. Field Standards, 1 set; 2 1-kg,

10-500 g; 1 each 250 g, lOOg,

50g , 30g , 20g, lOg, 5g , 2g, lg

,

500 mg

Stainless steel, 8.0 g/cm^ density,

austenitic, vacuum melted , nonmagnetic (wts. 10 mg and smaller

of Nichrome)

.

Stainless steel, type 3 03

Stainless Steel, type 303. (500 g

aluminum) Adjust to NBS Class F

tolerances

.

d. Field Standards 20 kg, 12 ea

e. Tare weight set, stainless steel

type 303; 1 kg, 500 g, 300g, 200g,

lOOg , 50g , 30g, 20g, lOg, 5g,

3g , 2g , lg , 500 mg

f. 20 g, capacity, single pan, constant Precision 0.002 mg

load, direct reading

g. 160 g capacity, single pan, Precision 0.0 2 mg

constant load, direct reading

h. 1 kg capacity, single pan, Precision 0.2 mg

constant load, direct reading

Cast Iron, adjusted to NBS Class F

tolerances

NBS Class F
18. -

i. 30 kg capacity, single pan,

constant load, direct reading

Precision 2. 0 mg

j. 500 kg capacity, equal arm

Russell Balance

Precision 1.0 g at capacity

k. Field Balance, package checking,

equal arm, 5 kg capacity

Precision 250 mg

Lenqth Standards

1. Steel Rule, 30 cm x 0.5 mm Accuracy 0.01 mm

m. Steel tape, 7 M, dm to I M

,

engraved graduations, 15 cm

blank first end

Accuracy 0.08 mm

n. Length Bench, 5 M x 1 M,

stainless steel, type 416

accesories

Accuracy 0.15 mm

o. Microscope, 20 X, 5.0 mm x

0.025 mm optical scale

Accuracy 0.001 mm

p. Tension weights , 5 kg, stainless

steel, type 303

NBS Class F

q. Steel tape, 30 M x 1 mm, 15 cm

blank first end

Accuracy 0 . 5 mm

r. Tape Rule, 3 M x 1 mm adjustable

end clip at zero

s . Micrometer

Accuracy 0.25 mm

Volume Standards

t. Automatic Pipets boro- silicate

3 1,2 1,1 1, 300 ml, 200 ml, 100 ml

(All sizes minus 5-10 ml)
19 . -

u. Automatic Buret, boro- silicate; Accuracy 0.01 ml

50 ml, 10 ml, (0.1 ml graduations) (10 ml buret)

v. Twenty Liter Standard , slicker Accuracy 1.0 ml

plate, stainless steel, type 3 03

w. Plastic Jars, reservoir for distilled

water, 4 each, 5 gallon capacity

x. Accesories for pipet- buret assembly

aluminum rack, rubber tubing,

clamps, connectors, thermometers

etc.

y. Test Measures,adjustable scale, 20

liter (5 gallon), low carbon steel

z. Test Measures flask, boro silicate

1 liter, 500 ml, 200 ml, 100 ml, 50 ml,

10 ml cylindrical graduate.

10. General Laboratory Equipment

a. Hoist, hydraulic, 1000 kg capacity,

mobile

b. Water heater, electric, 20 liter capacity

c. De-humidifier, control relative humidity (50% maximum) 2 each

d. Heater, electric, portable, control laboratory temperature (20° Cl, 1C)

2 each

e. Miscellaneous equipment, ie. , hammers, cutters, screwdrivers,

pliers,, drill, files, etc.
11. Standards and Equipment Costs * (Approximation)

a

.

Mass Standards

30 kg to 1 mg

$ 7,000

b. Mass Standards

two 250 kg wts

.

3,500

c. Field Standard weights

and measures 2,500

d

.

Precision Balances 20 g

160 g , 1 kg , 30 kg 21,000

e. Length Bench and Accesories 5,000

f. Standard Steel Tapes 800

g. Pipet- Buret Assembly 2,500

h. Russell Balance, 500 kg

capacity 4,500

i

.

Misc. Equip. (Heaters, dehumidifiers) 2,000

j

• Training, NBS 3,000

TOTAL $51,800

*A11 cost estimates include calibration, shipping,and installation.
21 .

12. Purchase Priority Recommendations

a . First Priority :

Small Mass Standards

Field Standards

Precision Balances

Steel Tapes

Pipets - Burets

Misc. Equip.

Training and Installation by NBS

b. Second Priority

Russell Balance

24 0 kg Mass Standards

c. Third Priority

$ 7,000

2,500

21,000

800

2.500

2,000

3,000

$38,800

$ 4,500

3.500

$ 8,000

Length Bench and Accesories $ 5,000
,

-

.


REFER ENC ES

1. Law For Legal Metrology (INEN)

2. Specifications and Tolerances and Other Technical Requirements

for Commercial Weighing and Measuring Devices, NBS Handbook

44 (NBS)

3. Model Packaging and Labeling Regulation (NBS) (INEN)

4. Licensing of Service Companies and Service Personnel (NBS) (INEN)

5. Procedures for Package Checking (NBS) (INEN)

6. Photographs of the Standards and Instruments (NBS) (INEN)
)

•-