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NIST Handbook 44 Standards Flashcards

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Read the first 7 NIST Handbook 44 Standards flashcards as text

  1. According to NIST HB 44, what is the primary purpose of the 'discrimination test' for a scale?

    Answer: To verify the scale can detect a small load added to a loaded scale near capacity

    The discrimination test verifies that a scale can detect a small additional weight (typically one-fourth or one-half division) placed on a loaded scale near its capacity.

  2. NIST HB 44 requires that the 'indicated net weight' on a computing scale used in retail sales must:

    Answer: Not be greater than the actual net weight by more than the applicable tolerance

    For consumer protection, HB 44 ensures computing retail scales do not overcharge customers by requiring the indicated net weight not exceed actual weight by more than the tolerance.

  3. Which of the following best describes an 'accuracy class' designation in NIST HB 44?

    Answer: A grouping of devices with similar tolerance and performance requirements

    Accuracy classes (e.g., Class I, II, III, IIIL, IIII) in HB 44 group devices with similar intended uses and corresponding tolerance requirements.

  4. NIST HB 44 requires that a device used for 'direct sales to the public' must have its weight indications:

    Answer: Visible to both the operator and the customer simultaneously

    HB 44 mandates that both the operator and the customer can read the weight indication at the same time during a retail transaction to ensure transparency.

  5. What does NIST HB 44 specify regarding the use of ballast or leveling materials beneath a vehicle scale foundation?

    Answer: Installation must ensure the scale remains level and stable under operating conditions

    HB 44 requires that vehicle scale installations be level and stable so that the scale performs within tolerances under normal operating loads.

  6. Under NIST HB 44, what is the 'minimum load' requirement for a commercial scale?

    Answer: The smallest load for which the device gives results within tolerance

    The minimum load (also called minimum capacity) is the smallest load the device can weigh within its stated accuracy tolerances for legal-for-trade use.

  7. NIST HB 44 requires that the 'test weights' used for field inspection of commercial scales must:

    Answer: Be certified to a tolerance within one-third of the applicable device tolerance

    Field standards (test weights) used in official inspections must have errors no greater than one-third of the tolerance of the device being tested, per HB 44 requirements.