NIST Handbook 44 is a nationally adopted standard that provides a comprehensive set of requirements for evaluating the accuracy of weighing and measurement devices. Although it is not federal law, its proedures are widely accepted and used by law enforcement to evaluate the accuracy of scales used in commerce (buying and selling). Following Handbook 44 procedures helps to identity weighing errors such as linearity and shift. Its broad adoption has played an integral role in regulating weight measurement, improving quality/consistency, and ensuring integrity in the marketplace. It also provides a uniform system of checking scales and helps to ensure consistency in the scale calibration industry as well as fairness and equity in the marketplace.
Premier Scales & Systems often uses the NIST Handbook 44 testing methods on legal-for-trade scales and in cases where there is no customer-specified testing procedure.