5 Terms to Know and References
National Institute of Standards and Technology (NIST)
NIST is part of the US Department of Commerce. Its mission is to "promote US innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life." NIST works in cooperation with the NCWM and publishes the HB44 standard. NIST has no regulatory authority. The NCWM is a US professional nonprofit association of state and local weights and measures officials, federal agencies, manufacturers, retailers, and consumers. Its mission is to "ensure equity and uniform standards in a changing marketplace." The NCWM produces and maintains the Handbook 44 standard. Handbook 44 is a standard developed by the NCWM and published annu- ally by NIST for use in the US. It defines the specifications, tolerances, and other technical requirements for weighing and measuring devices. It has no legal status except when it is officially adopted by individual states. NTEP is a program sponsored by the NCWM to independently test and eva- luate weighing and measuring device types to the HB44 standard. Once an NTEP evaluation is completed, a Certificate of Conformance (CC) is issued for the device type. Most states require a NTEP CC before a weighing or mea- suring device can be placed into commercial service. A weighing or measure device that has been certified to meet the require - ments of Handbook 44 and can be used for commercial transactions based on a measurement (e.g. weight, volume, length, etc.). The device is inspected by a state W&M official or representative who applies a seal to the device to identify its status as legal-for-trade. Most states require a device to have a valid NTEP CC before it can be accepted as legal-for-trade.
National Conference of Weights and Measures (NCWM)
Handbook 44
National Type Evaluation Program (NTEP)
Legal-for-Trade (LFT)
The following resources were used during the research and drafting of this white paper:
www.ncwm.com www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44-current-edition
www.mt.com/truckpass www.nist.gov/about-nist www.ncwm.com/about-ncwm
www.mt.com/TruckPass
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Subject to technical changes ©04/2022 METTLER TOLEDO. All rights reserved Document No. 30572618 A MarCom Industrial
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