Section 5

**Page**

[5.50. Fabric‑Measuring Devices 5-3](#fabric)

[5.51. Wire‑ and Cordage‑Measuring Devices
5-7](../5.51-07-HB44-Final.doc)

[5.52. Linear Measures 5-11](../5.52-07-HB44-Final.doc)

[5.53. Odometers 5-13](../5.53-07-HB44-Final.doc)

[5.54. Taximeters 5-17](../5.54-07-HB44-Final.doc)

[5.55. Timing Devices 5-23](../5.55-07-HB44-Final.doc)

[5.56.(a) Grain Moisture Meters 5-27](../5.56a-07-HB44-Final.doc)

[5.56.(b) Grain Moisture Meters 5-35](../5.56b-07-HB44-Final.doc)

[5.57. Near-Infrared Grain Analyzers 5-41](../5.57-07-HB44-Final.doc)

[5.58. Multiple Dimension Measuring Devices
5-49](../5.58-07-HB44-Final.doc)

[5.59. Electronic Livestock, Meat, and Poultry Evaluation Systems and/or
Devices --\
Tentative Code 5-57](../5.59-07-HB44-Final.doc)

**THIS PAGE LEFT INTENTIONALLY BLANK.**

[]{#fabric .anchor}**Section 5.50. Fabric-Measuring Devices**

## A. Application

**A.1.** - This code applies only to mechanisms and machines designed to
indicate automatically (with or without value‑computing capabilities)
the length of fabric passed through the measuring elements.

**A.2.** - Insofar as they are clearly appropriate, the requirements and
provisions of this code apply also to devices designed for the
commercial measurement of other material similar to fabrics, in sheet,
roll, or bolt form.

**A.3.** - See also Sec. 1.10; General Code requirements.

## S. Specifications

**S.1. Units.** - A fabric-measuring device shall indicate lengths in
terms of 10 cm (^1^/8 yd), 25 cm (¼ yd), 50 cm (½ yd), and meters (yd).
In addition, lengths may be indicated in terms of any or all of the
following subdivisions: 30 cm (⅓ yd), 6 cm (^1^/16 yd), meters and
centimeters (feet and inches). Digital indicators may indicate values in
decimal fractions.

(Amended 1977)

**S.2. Design of Indicating Elements.**

> **S.2.1. Graduations.**
>
> **S.2.1.1. Length.** - Graduations shall be so varied in length that
> they may be conveniently read.
>
> **S.2.1.2. Width.** - In any series of graduations, the width of a
> gradua­tion shall in no case be greater than the width of the minimum
> clear interval between graduations, and the width of main graduations
> shall be not more than 50 % greater than the width of subordinate
> graduations. Graduations shall in no case be less than 0.2 mm
> (0.008 in) in width.
>
> **S.2.1.3. Clear Interval Between Graduations.** ‑ The clear interval
> between graduations shall be at least 6 mm for cm graduations (¼ in
> for ^1^/8 yd graduations), and 3 mm for 20 cm graduations (^1^/8 in
> for 1 in graduations).
>
> **S.2.2. Indicator.**
>
> **S.2.2.1. Symmetry.** - The index of an indicator shall be
> symmetrical with respect to the graduations, at least throughout that
> portion of its length associated with the graduations.
>
> **S.2.2.2. Length.** - The index of an indicator shall reach to the
> finest graduations with which it is used, unless the indicator and the
> graduations are in the same plane, in which case the distance between
> the end of the indicator and the ends of the graduations, measured
> along the line of the graduations, shall be not more than 1.0 mm
> (0.04 in).
>
> **S.2.2.3. Width.** - The index of an indicator shall not be wider
> than the narrowest graduations with which it is used, and shall in no
> case exceed 0.4 mm (0.015 in).
>
> **S.2.2.4. Clearance.** - The clearance between the index of an
> indicator and the graduations shall in no case be more than 1.5 mm
> (0.06 in).
>
> **S.2.2.5. Parallax.** - Parallax effects shall be reduced to the
> practicable minimum.
>
> **S.2.3. Money‑Value Computations.**
>
> **S.2.3.1. Full‑Computing Type.** - In this type, the money value at
> each of a series of unit prices shall be computed automatically for
> every length within the range of measurement of the fabric‑measuring
> device. Value graduations shall be provided and shall be accurately
> positioned. The value of each graduated interval shall be 1 cent at
> all prices per yard of 30 cents and less, and shall not exceed 2 cents
> at higher prices per yard. Five‑cent intervals may be represented in
> the 2‑cent range by special graduations, but these shall not be
> positioned in the clear intervals between graduations of the regular
> series.
>
> **S.2.3.2. Limited‑Computing Type.** - In this type, the money value
> at each of a series of unit prices shall be computed automatically
> only for lengths corresponding to a definite series of length
> graduations. There shall be no value graduations. At no position that
> the chart can assume shall two value figures at the same price per
> yard be completely and clearly exposed to view at one time. Money
> values shown shall be mathematically accurate, except that a fraction
> of less than ½ cent shall be dropped and the next higher cent shall be
> shown in the case of a fraction of ½ cent or more. One of the
> following requirements shall be met:

\(a\) There shall be a money-value computation for each length
graduation within the range of measurement of the device.

> \(b\) No money-value computation shall be exposed to view except at
> such times as the device shows a length indication for which a
> corresponding series of value indications is computed.
>
> \(c\) Each column or row of money-value computa­tions shall be marked
> to show the length to which the computations correspond, the device
> shall be marked to show the character and limitations of the
> computations, and there shall be computations corresponding to at
> least 10 cm (^1^/8 yd) throughout the range of measurement of the
> device.
>
> **S.2.4. Return to Zero.** - Primary indicating elements shall be
> readily returnable to a definite zero indication. Means shall be
> provided to prevent the return of the indicating elements beyond their
> correct zero positions.

**S.3. Marking Requirements.** - If a device will not accurately measure
all fabrics, it shall be marked to indicate clearly its limitations.

**S.4. Design Accuracy.** - Indications of length and money value shall
be accurate whether the values of the indications are being increased or
decreased.

## N. Notes

**N.1. Testing Medium.** - A fabric‑measuring device shall be tested
with a suitable testing tape approximately 7.62 cm (3 in) wide and with
a graduated length of at least 11 m (12 yd), made from such material and
having such surface finish as to provide dimensional stability and
reduce slippage to the practicable minimum.

## T. Tolerances

**T.1. Tolerance Values.** ‑ Maintenance and acceptance tolerances shall
be as shown in Table 1.

+-------------+-------------+-------------+------------+-------------+
| **Table     |             |             |            |             |
| 1.**        |             |             |            |             |
|             |             |             |            |             |
| **          |             |             |            |             |
| Maintenance |             |             |            |             |
| and         |             |             |            |             |
| Acceptance  |             |             |            |             |
| T           |             |             |            |             |
| olerances** |             |             |            |             |
|             |             |             |            |             |
| **for       |             |             |            |             |
| Fabri       |             |             |            |             |
| c-Measuring |             |             |            |             |
| Devices**   |             |             |            |             |
+-------------+-------------+-------------+------------+-------------+
| *           | **          |             | **         |             |
| *Indication | Maintenance |             | Acceptance |             |
| of**        | Tolerance** |             | T          |             |
|             |             |             | olerance** |             |
| **Device**  |             |             |            |             |
|             |             |             |            |             |
| **(yards)** |             |             |            |             |
+-------------+-------------+-------------+------------+-------------+
|             | **On        | **On        | **On       | **On over** |
|             | under‑**    | over‑**     | under**    |             |
|             |             |             |            | **reg       |
|             | **reg       | **reg       | **regi     | istration** |
|             | istration** | istration** | stration** |             |
|             |             |             |            | *           |
|             | *           | *           | **         | *(inches)** |
|             | *(inches)** | *(inches)** | (inches)** |             |
+-------------+-------------+-------------+------------+-------------+
| 2 or less   | ^3^/8       | ¼           | ¼          | ^1^/8       |
+-------------+-------------+-------------+------------+-------------+
| 3           | ^3^/8       | ^5^/16      | ¼          | ^5^/32      |
+-------------+-------------+-------------+------------+-------------+
| 4           | ½           | ^5^/16      | ¼          | ^5^/32      |
+-------------+-------------+-------------+------------+-------------+
| 5           | ^5^/8       | ^3^/8       | ^5^/16     | ^3^/16      |
+-------------+-------------+-------------+------------+-------------+
| 6           | ¾           | ^3^/8       | ^3^/8      | ^3^/16      |
+-------------+-------------+-------------+------------+-------------+
| 7 and 8     | 1           | ½           | ½          | ¼           |
+-------------+-------------+-------------+------------+-------------+
| 9           | 1¼          | ^5^/8       | ^5^/8      | ^5^/16      |
+-------------+-------------+-------------+------------+-------------+
| 10 and 11   | 1½          | ¾           | ¾          | ^3^/8       |
+-------------+-------------+-------------+------------+-------------+
| 12 and 13   | 1¾          | ^7^/8       | ^7^/8      | ^7^/16      |
+-------------+-------------+-------------+------------+-------------+
| 14 and 15   | 2           | 1           | 1          | ½           |
+-------------+-------------+-------------+------------+-------------+
| Over 15     | Add ^1^/8   | Add ^1^/16  | Add ^1^/16 | Add ^1^/32  |
|             | inch        | inch        | inch       | inch        |
|             |             |             |            |             |
|             | per         | per         | per        | per         |
|             | indicated   | indicated   | indicated  | indicated   |
|             | yard        | yard        | yard       | yard        |
+-------------+-------------+-------------+------------+-------------+

## UR. User Requirements

**UR.1. Installation Requirements.**

> **UR.1.1. Installation.** - A fabric‑measuring device shall be
> securely supported and firmly fixed in position.

**UR.2. Use Requirements.**

> **UR.2.1. Limitation of Use.** - A fabric‑measuring device shall be
> used to measure only those fabrics that it was designed to measure,
> and in no case shall it be used to measure a fabric that a marking on
> the device indicates should not be measured.

**UR.2.2. Return of Indicating Elements to Zero.** - The primary
indicating elements shall be returned to zero before each measurement.

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