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1.关于检定时的环境条件规程中规定了检定时的环境温度为20±5℃,相对湿度为30%～85%,并对仪表的供电电源,周围磁场也作了相应的规定。这些规定的目的是为了尽量减少影响量对示值产生的附加误差。在上述条件下,对仪表的示值影响只占仪表允许误差的1/7(实验所得),对作为标准仪器的0.05级直流电位差计而言,其最大示值误差也不大于仪表允许误差的1/5,再加上检定方法误差,总的检定不确定度不大于仪表允许误差的1/3,因此符合量值传递原则。若超过
1. On the test conditions of the environment when the provisions of the test when the ambient temperature is 20 ± 5 ℃, relative humidity of 30% to 85%, and the power supply of the instrument, the surrounding magnetic field has also made the corresponding provisions. The purpose of these provisions is to minimize the additional error that effects the amount on the indication. Under the above conditions, the impact on the meter shows only 1/7 of the allowable error of the meter (the experimentally obtained value). For the 0.05-level DC potentiometer as a standard instrument, the maximum error of indication is not greater than the allowable error of the meter 1/5, plus test method error, the total test uncertainty is not greater than the instrument allows the error of 1/3, so in line with the principle of value transfer. If more than