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为保证产品的正常提交,通常按标准器的误差n是受检器误差e的1/3～1/5(或m=e/n=3～5)来选定标准器。当标准器与受检器皆不存在系统误差且检定用的误差控制限选为受检器的均方根偏差的三倍时,其检定的风险率(按受检器的观测值判定为合格的产品中含有实际不合格品的慨率)可控制在0.07％以下。对于诸如压力计类型的标准器和受检器,通常存在非线性及迟滞等系统误差。在标准器
In order to ensure the normal submission of the product, the standard device is usually selected according to the error n of the standard device being 1/3 ~ 1/5 (or m = e / n = 3 ~ 5) of the error e of the detected object. When there is no systematic error between the standard and the detector and the error control limit for the test is selected to be three times the rms deviation of the detector, the risk ratio of the test (judged as conforming to the observation value of the detector Of the products contain the actual rejection rate of the generous rate) can be controlled below 0.07%. For gauges and testers of a type such as pressure gauges, systematic errors such as non-linearities and hysteresis are often present. In the standard