1.10. General

G-S.1.(c) Identification; Model Designation

Nonretroactive as of January 1, 2003

The model designation shall be prefaced by the term“Model,” “Type,” or “Pattern” and may be followed by the term “Number” or theminimum abbreviation of those words. The abbreviation for the term “Model”shall be “Mod” or “Mod.” The prefixlettering may be initial capitals, all capitals, or all lower case.

G-S.1.(g) Identification; National Type Evaluation Program (NTEP) Certificate ofConformance Number

Nonretroactive as of January 1, 2003

Devices holding an NTEP Certificate of Conformance (CC)Number shall be marked with the CC Number or corresponding CC addendumnumber. The NTEP CC Number shall beprefaced by the terms “NTEP CC,” “CC,” or “Approval.” The terms may include the term “Number.”

2.20. Scales

S.6.5. Livestock Scales

Nonretroactive as of January 1, 2003

¹ Livestock scales shall be marked withthe maximum capacity of each section of the load receiving element on oradjacent to the ID plate attached tothe indicating element of the scale.

Enforceable on January 1, 2003 the nominal capacity forscale with more than two sections shall not exceed twice its rated sectioncapacity and the nominal capacity for two-section scales shall not exceed itsrated section capacity.

Table S.6.3.a. Marking Requirements and TableS.6.3.b.Notes For Table S.6.3.a.; Note 9 Concentrated Load Capacity (CLC)

Nonretroactive as of January 1, 1989

¹ For vehicle and axle-load scalesonly. The CLC shall be added to theload-receiving element of any such scale not previously marked at the time ofmodification. Marking requirement no longer applies tolivestock scales manufactured or placed into service after January 1, 2003.

2.20 Scales(continued)

Table S.6.3.a. Marking Requirements and Table S.6.3.b.Notes For Table S.6.3.a.; Note 12, Concentrated Load Capacity (CLC)

*Nonretroactive as of January 1, 1989

No longer applies to livestock scales

¹ Requiredon the indicating element and the load-receiving element of vehicle and axle‑loadscales. Such marking shall beidentified as “concentrated load capacity” or by the abbreviation“CLC.”* Marking requirement no longer applies to livestockscales manufactured or placed into service after January 1, 2003.

Table S.6.3.a. Marking Requirements and Table S.6.3.b.Notes For Table S.6.3.a.;, Note 14, Section Capacity

Nonretroactive as of January 1, 2003

¹ Section Capacity markings are requiredon livestock and railway track scales. For vehicle and axle-load scalesmanufactured before January 1, 1989 CLC markings may be used. Livestock scales manufactured betweenJanuary 1, 1989 and January 1, 2003 required markings may be either CLC orsection capacity.

Table S.6.3.a. Marking Requirements and Table S.6.3.b.Notes For Table S.6.3.a.;, Note 22,Section Capacity

Nonretroactive as of January 1, 2003

Combination vehicle/livestock scales must be marked withboth CLC for vehicle weighing and section capacity for livestockweighing. All other requirements relativeto these markings will apply.

2.21. Belt-Conveyor Scale Systems

S.1.4.1.

Nonretroactive as of January 1, 2004

The belt-conveyor scale system shall be capable ofrecording the results of automatic or semi-automatic zero load tests.

S.3.1. Design of Zero-Setting Mechanism

*Nonretroactive as of January 1, 1990

**Nonretroactive as of January 1, 2004

¹ Except for systems that record the zero load reference at thebeginning and end of a delivery, the range of the zero-setting mechanismshall not be greater than ± 2 percent of the rated capacity of thescale without breaking the security means. Automatic and semi-automatic zero-setting mechanisms shall be soconstructed that the resetting operation is carried out only after a wholenumber of belt revolutions and the completion of the setting or the wholeoperation is indicated. An audio orvisual signal shall be given when the automatic and semi-automaticzero-setting mechanisms reach the limit of adjustment of the zero-settingmechanism*. Systems that record thezero load reference at the beginning and end of a delivery, the range ofzero-setting mechanism shall not be greater than ± 5 percentwithout breaking the security means**.

3.30. Liquid-Measuring Devices

S.4.4.2.Location of Marking Information; Retail Motor-Fuel Dispensers

Nonretroactiveas of January 1, 2003

Therequired marking information in the General Code, Paragraph G-S.1. shallappear as follows:

(a) Placement of this information shall not beon a removable or interchangeable portion of the device.

(b) The information shall appear 24 to 60inches from the base of the dispenser when placed on the outside of thedevice.

(c)When placed behind an access door or panel the information shall appear 24inches to 60 inches from the base of the dispenser in a readily legibleposition. The use of a dispenser key shall not be considered a tool separatefrom the device.

TableS.2.2. Categories of Device andMethods of Sealing

Nonretroactiveas of

January 1, 2005

Manufacture of a Category 2 devices is permissible up toJanuary 1, 2005; after January 1, 2005 all new deviceswith remote communication capability must meet sealing requirements forCategory 3.

3.37. Mass FlowMeters

TableS.3.5. Categories of Device andMethods of Sealing

Nonretroactiveas of

January 1, 2005

Manufacture of a Category 2 devices is permissible up toJanuary 1, 2005; after January 1, 2005 all new deviceswith remote communication capability must meet sealing requirements forCategory 3.

2.20. Scales

S.6.1. Nominal Capacity; Vehicle, and Axle-LoadScales

Applies toall equipment on January 1, 2003

Forall vehicle and axle‑load scales, the marked nominal capacity shall notexceed the concentrated load capacity (CLC) times the quantity of the numberof sections in the scale minus 0.5.

[Note: When the device is used in a combination railway track and vehicleweighing application, the above formula shall apply only to the vehicle scaleapplication.]

2.21. Belt-Conveyor Scale Systems

N.1. General

Applies to all equipment on January 1, 2003

Belt-conveyor scales arecapable of weighing bulk materials accurately. (See Tolerances.) However, their performance can bedetrimentally affected by the conditions of the installation. (See User Requirements.) The performance of the equipment is not tobe determined by averaging the results of the individual tests. The results of all tests shall be withinthe tolerance limits.

N.3.1. Zero Load Tests

Applies to all equipment on January 1, 2003

A zero-load test shall be conducted toestablish that the belt scale system (including the conveyor) is capable ofholding a stable, in-service zero.

N.3.1.1. Determination of Zero

Applies to all equipment on January 1, 2003

A“Zero-Load Test” is a determination of the error in zero, expressed as aninternal reference, a percentage of the full scale capacity, or a change in atotalized load over a whole number of complete belt revolutions. For belt-conveyor scales with electronicintegrators, the test must be performed over a period of at least 3 minutesand with a whole number of complete belt revolutions. For belt-conveyor scales with mechanicalintegrators, the test shall be performed with no less than three completerevolutions or 10 minutes operation, whichever is greater.

2.21.Belt-Conveyor Scale Systems (continued)

N.3.1.2. Initial Stable Zero

Applies to all equipment on January 1, 2003

The conveyor system shall berun to warm up the belt and the belt scale shall be zero adjusted asrequired. A series of zero-load testsshall be carried out until three consecutive zero-load tests each indicate an error whichdoes not exceed +/- 0.06 % of the full-scale capacity or +/- one division, whichever isless. No adjustments can be madeduring the three consecutive zero-load test readings.

N.3.1.3. Test of Zero Stability

Applies to all equipment on January 1, 2003

The conveyor system shall be run to warm up the belt and the beltscale shall be zero adjusted as required. A series of zero-load tests shall be carried out immediately beforethe simulated or materials test until the three consecutive zero-load testseach indicate an error which does not exceed +/- 0.06% of the full-scalecapacity or +/- one division,whichever is less. No adjustments canbe made during the three consecutive zero-load test readings.

Immediately after materialhas been weighed over the belt-conveyor scale during the conduct of thematerials test, the zero-load test shall be repeated. The zero error from this test shall notexceed +/- 0.12% of the full-scale capacity or +/- two divisions, whichever is less.

2.21.Belt-Conveyor Scale Systems (continued)

N.3.1.4. Check For Consistency Of The Conveyor BeltAlong Its Entire Length.

Applies to all equipment on January 1, 2003

After azero-load test with flow rate filtering disabled, the totalizer shall notchange more than three scale divisions from its initial indication during onecomplete belt revolution.

N.3.2. Material Tests

Applies to all equipment on January 1, 2003

Material tests should be conducted using all actual beltloading conditions. These beltloading conditions shall include but are not limited to conducting materialstests using different belt loading points, all types and sizes of productsweighed on the scale, at least one other belt speed, and in both directionsof weighing.

On initial verification,at least three individual tests shall be conducted. On subsequent verifications, at least two individual testsshall be conducted. The results of all these tests shall be within thetolerance limits.

Either pass a quantity of pre-weighedmaterial over the belt-conveyor scale in a manner as similar as feasible toactual loading conditions, or weigh all material that has passed over thebelt‑conveyor scale. Means forweighing the material test load will depend on the capacity of thebelt-conveyor scale for the test and the availability of a suitable scale forthe test. To assure that the testload is accurately weighed and determined, the following precautions shall beobserved. . .

UR.2.2. (a) Installation General

Applies to all equipment on January 1, 2003

(a) A belt-conveyor scaleshall be so installed that neither its performance nor operation will beadversely affected by any characteristic of the installation, including butnot limited to, the foundation, supports, covers, or any other equipment.

2.21.Belt-Conveyor Scale Systems (continued)

UR.3.2. Maintenance (b)

Applies to all equipment on January 1, 2003

Simulated load tests or materials tests, and zero loadtests shall be conducted at periodic intervals between official tests toprovide reasonable assurance that the device is performing correctly.

The action to be taken asa result of the material tests or simulated load tests is as follows: . . .

UR.3.2.(e) Zero Load Reference Information

Applies to all equipment on January 1, 2003

When zero load reference information is recorded for adelivery the information must be based upon zero load tests performed as aminimum both immediately before and immediately after the totalized load.

UR.3.3.Retention of Maintenance, Test, and Chart Recorder Information

Applies to all equipment on January 1, 2003

Records of calibration and maintenance, includingconveyor alignment, chart recorder, zero-load test and material test datashall be maintained on site for at least the three concurrent years as ahistory of scale performance. Copiesof any report as a result of a test or repair shall be mailed to the officialwith statutory authority as required. The current date and correction factor(s) for simulated load equipmentshall be recorded and maintained in the scale cabinet.

3.30. Liquid-Measuring Devices

S.3.2. Exceptions

Applies to all equipment on January 1, 2003

The provisions of S.3.1.Diversion Prohibited shall not apply to truck refueling devices whendiversion of flow to other than the receiving vehicle cannot readily beaccomplished and is readily apparent. Allowable deterrents include, but are not limited to, physical barriersto adjacent driveways, visible valves, or lighting systems that indicatewhich outlets are in operation, and explanatory signs.

3.30. Liquid-MeasuringDevices (continued)

S.4.4.1. Discharge Rates

Applies to all equipment on January 1, 2003

¹ On a retail device with a de­signedmaximum dis­charge rate of 115 L (30 gal) per minute or greater, the maxi­mumand mini­mum discharge rates shall be marked on an exterior surface of thedevice and shall be visible after instal­la­tion. The minimum discharge rate shall not exceed 20 percent of the maximumdischarge rate.

[Non­retroac­tiveas of January 1, 1985.]

Thedischarge rate changes from 100 L to 115 L.

Table T.2. Accuracy Classes for Liquid Measuring DevicesCovered in

NISTHandbook 44 Section 3.30.

Applies to all equipment on January 1, 2003

A new table oftolerances applies to all liquid‑measuringdevices in Section 3.30. Thetolerances are based on the device’s accuracy class. (See paragraph T.2. Tolerance Values andTableT.2.) The performance tolerancesfor device repeatability and automatic temperature compensating systemsremain the same.

3.31.Vehicle-Tank Meters

Tolerances,Table 1 Accuracy Classes for Vehicle‑TankMeters

Applies to all equipment on January 1, 2003

A new table oftolerances applies to all vehicle‑tankmeters in Section 3.31. Thetolerances are based on the device’s accuracy class. (See paragraph T.2. Tolerance Values andTable 1.) The performance tolerancesfor device repeatability and vehicle‑mounted milk meters remain thesame.

3.33. Hydrocarbon Gas Vapor‑Measuring Devices

N.4.1.2. Repeatability Tests

Applies toall equipment on January 1, 2003

Tests for repeatability should include a minimum of three consecutivetest drafts of approximately the same size and be conducted under controlledconditions where variations in factors, such as temperature, pressure, andflow rate are reduced to the extent that they will not affect the resultsobtained.

3.33. Hydrocarbon Gas Vapor‑Measuring Devices(continued)

T.2. Repeatability

Applies toall equipment on January 1, 2003

When multiple tests are conducted at approximately the same flow rateand draft size, the range of the test results for the flow rate shall notexceed 0.9 percent and the results of each test shall be within the applicabletolerance. See also N.4.1.2.

3.34. Cryogenic Liquid-Measuring Devices

S.1.1.2. Units

Applies toall equipment on January 1, 2003

¹A device shall indicate and record, ifequipped to record, its deliveries in terms of: kilograms or pounds; litersor gallons of liquid at the normal boiling point of the specific cryogenicproduct; cubic meters (cubic feet) of gas at a normal temperature of 21 ° C(70 ° F)and an absolute pressure of 101.325 kPa (14.696 psia); or decimalsubdivisions or multiples of the measured units cited above.

S.1.1.3. Value of Smallest Unit

Applies toall equipment on January 1, 2003

The value of the smallestunit of indicated delivery, and recorded delivery, if the device is equippedto record, shall not exceed the equivalent of:

(a) for small delivery devices

(1) 1 L

(2) 0.1 gal

(3) 1 kg

(4) 1 lb

(5) 0.1 m³ of gas

(6) 10 cubic feet of gas

(b) for large deliverydevices

(1) 10L

(2) 1gal

(3) 10 kg

(4) 10 lb

(5) 1 m³of gas

(6) 100 ft³ of gas

3.34. Cryogenic Liquid-Measuring Devices (continued)

S.2.4. AutomaticTemperature or Density Compensation

Applies toall equipment on January 1, 2003

¹ A device shall be equipped with automaticmeans for adjusting the indication and/or recorded representation of themeasured quantity of the product, to indicate and/or record in terms of: kilograms or pounds; or liters or gallonsof liquid at the normal boiling point of the specific cryogenic product; orthe equivalent cubic meters (cubic feet) of gas at a normal temperature of21 °C (70 °F) and an absolute pressure of 101.325 kPa (14.696lb/in² absolute). When a compensator system malfunctions,the indicating and recording elements may indicate and record inuncompensated volume if the mode of operation is clearly indicated, e.g., bya marked annunciator, recorded statement, or other obvious means.*

[*Nonretroactive as of January 1, 1992.]

3.35. Milk Meters

N.4.1.1. Repeatability Tests

Applies to all equipment on January 1, 2003

Tests for repeatability should include a minimum of three consecutivetest drafts of approximately the same size and be conducted under controlledconditions where variations in factors, such as temperature, pressure, andflow rate are reduced to the extent that they will not affect the resultsobtained.

T.3. Repeatability

Applies to all equipment on January 1, 2003

When multiple tests are conducted at approximately the same flow rateand draft size, the range of the test results for the flow rate shall notexceed 40 percent of the absolute value of the maintenance tolerance and theresults of each test shall be within the applicable tolerance. Seealso N.4.1.1.

3.36. Water Meters

A.1.

Applies to all equipment on January 1, 2003

This code applies to devices used for the measurement of water;generally applicable to, but not limited to, utilities type meters installedin residences, or business establishments and meters installed in batchingsystems.

S.1.1.1. General

Applies to all equipment on January 1, 2003

A water meter shall be equipped with a primary indicating element andmay also be equipped with a primary recording element. Such elements shall be visible at thepoint of measurement or be stored in non-volatile electronic memory. The display may be remotely locatedprovided it is readily accessible to the customer.

N.4.1.Normal Tests

Applies to all equipment on January 1, 2003

The normal test of a meter shall be made at the maximum discharge ratedeveloped under conditions of the installation. Meters with maximum gallon per minute ratings higher than Table1 values may be tested up to the meter rating, with meter indications no lessthan those shown.

N.4.1.1. Repeatability Tests

Applies to all equipment on January 1, 2003

Tests for repeatability should include a minimum of three consecutivetest drafts of approximately the same size and be conducted under controlledconditions where variations in factors, such as temperature, pressure, and flowrate are reduced to the extent that they will not affect the resultsobtained.

T.1.1. Repeatability

Applies to all equipment on January 1, 2003

When multiple tests are conducted at approximately thesame flow rate, the range of the test results shall not exceed 0.6 percentfor tests performed at the normal and intermediate flow rates, and 1.3percent for tests performed at the minimum flow rate, and each test shall bewithin the applicable tolerance.

3.36. Water Meters (continued)

Table 1. Tolerances for Water Meters Normal Tests

Applies to all equipment on January 1, 2003

Table 1 recognizes water meters that are less than 5/8 inch in size

Table 2. Tolerances for Water Meters

Special Tests

Applies to all equipment on January 1, 2003

Table 2 recognizes water meters that are less than 5/8 inch in size

3.37. Mass Flow Meters

S.4.1. Diversion of Measured Product

Applies to all equipment on January 1, 2003

No means shall be providedby which any measured product can be diverted from the measuringinstrument. However, two or moredelivery outlets may be permanently installed and operated simultaneously,provided that any diversion of flow to other than the intended receivingreceptacle cannot be readily accomplished or is readily apparent. Such means include physical barriers,visible valves or indications that make it clear which outlets are inoperation, and explanatory signs if deemed necessary.

A manually controlledoutlet that may be opened for purging or draining the measuring system or forrecirculating product if recirculation is required in order to maintain theproduct in a deliverable state shall be permitted. Effective means shall be provided to prevent passage of liquidthrough any such outlet during normal operation of the measuring system andto inhibit meter indications (or advancement of indications) and recordedrepresentations while the outlet is in operation.

3.38. Carbon Dioxide Liquid‑Measuring Devices

Code Status

Applies to all equipment on January 1, 2003

Section 3.38. Carbon Dioxide Liquid‑MeasuringDevices Code is now a permanent code enforceable for all commercial devices.

3.38. Carbon Dioxide Liquid‑Measuring Devices(continued)

N.4.1.1. Repeatability Tests

Applies to all equipment on January 1, 2003

Tests for repeatability should include a minimum of three consecutivetest drafts of approximately the same size and be conducted under controlledconditions where variations in factors, such as temperature, pressure, andflow rate are reduced to the extent that they will not affect the resultsobtained.

T.2.3. Repeatability

Applies to all equipment on January 1, 2003

When multiple tests are conducted at approximately the same flow rateand draft size, the range of the test results for the flow rate shall notexceed 40 percent of the absolute value of the maintenance tolerance and theresults of each test shall be within the applicable tolerance. See also N.4.1.1.

5.57. Near‑InfraredGrain Analyzers

Code Status

Applies to all equipment on January 1, 2003

Section 5.57. Near‑Infrared GrainAnalyzers Code is now a permanent code enforceable for all commercialdevices.

Definition-Appendix D

automatic zero-setting mechanism

(belt-conveyor scale)

Applies to all equipment on January 1, 2003

A zero setting device that operates automatically withoutintervention of the operator after the belt has been running empty. [2.21] (Consistent with OIML R-50)

Definition-Appendix D

contract sale

Applies to all equipment on January 1, 2003

A sale where a writtenagreement exists, prior to the point of sale, in which both buyer and sellerhave accepted pricing conditions of the sale. Examples include, but are not limited to: e-commerce, clubsales, or pre-purchase agreements. Any devices used in the determination ofquantity must comply with NIST Handbook 44. [3.30]

Definition-Appendix D

dry hose

Applies to all equipment on January 1, 2003

A discharge hose intendedto be completely drained at the end of each delivery of product. [See "dry‑hosetype."][3.30, 3.31]

Definitions-Appendix D

element

Applies to all equipment on January 1, 2003

A portion of a weighing or measuring device or systemwhich performs a specific function and can be separated, evaluatedseparately, and is subject to specified full or partial error limits.

Definitions-Appendix D

wet hose

Applies to all equipment on January 1, 2003

A discharge hose intendedto be full of product at alltimes. [See "wet-­hosetype."][3.30, 3.31]

Definitions-Appendix D

wet-hosetype

Applies to all equipment on January 1, 2003

A type of device designedto be operated with the discharge hose full of product at all times. [See “wet hose.”][3.30, 3.32, 3.34, 3.37,3.38]

Definitions-Appendix D

zero-loadreference (belt-conveyor scales)

Applies to all equipment on January 1, 2003

A zero-load reference value represents no load on amoving conveyor belt. This value canbe either; a number representing the electronic load cell output, apercentage of full scale capacity, or other reference value that accuratelyrepresents the no load condition of a moving conveyor belt. The no loadreference value can only be updated after the completion of a zero load test.[2.21]

Definitions-Appendix D

zero-settingmechanism (belt-conveyor scale)

Applies to all equipment on January 1, 2003

A mechanism enabling zero totalization to be obtained over a wholenumber of belt revolutions [2.21].(Consistent with OIML R-50)