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气体活塞式压力计是以气体为工作介质的活塞式压力计,具有高准确度、高灵敏度、清洁无污染等特点,目前已经被广泛应用在压力计量检定校准领域。2013年我国发布了JJG 1086-2013《气体活塞式压力计》国家计量检定规程,对气体活塞式压力计开展检定校准。在气体活塞式压力计检定校准过程中经常需要对有效面积测量结果的不确定度进行评定,本主要介绍了0.02级气体活塞式压力计有效面积测量结果的不确定度评定方法,供同行参考。
Gas piston pressure gauge is a piston-type manometer with gas as working medium. It has the characteristics of high accuracy, high sensitivity, clean and pollution-free. It has been widely used in the field of pressure measurement and calibration. In 2013, China released the JJG 1086-2013 “National Standards of Gas Piston Pressure Gauges” and carried out verification and calibration of the gas piston gauge. It is often necessary to assess the uncertainty of the measurement of the effective area during the calibration verification of a gas piston gauge. This article mainly introduces the method of assessing the uncertainty of the measurement result of the effective area of a 0.02-gauge gas piston gauge for reference by peers.