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Title: Design, Calibration And Operation Of Field Standard Test Measures
Author: Michael J Yeandle
Source: 2003 International School of Hydrocarbon Measurement
Year Published: 2003
Abstract: Atmospheric metal volumetric measures with a top neck and graduated scale, traceable to a recognized national calibration agency such as the National Institute of Standards and Technology (NIST), are known as test measures. They are used for the purpose of calibrating liquid meter provers. NIST generally refers to hand held measures ( 10 gallons) which are drained overhead as test measures, and to stationary measures ( 10 gallons and 1500 gallons) which are drained by a bottom drain valve as provers. Since both these types of measures are used in the waterdraw calibration of liquid meter provers (volumetric tank and displacement types), the American Petroleum Institute (API) has adopted the convention of referring to both types of standards as field standard test measures. For brevity, field standard test measures will be referred to as test measures in this paper. Normal sensitivity test measures are those typically used for provers larger than 50 gallons displaced volume. High sensitivity measures are preferred for the calibration of provers smaller than or equal to 50 gallons. All test measures must be handled, transported and stored with care to prevent jeopardizing the integrity of their calibrations.

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