【摘要】 数字式功率表不仅具有以前功率表计的作用,而且具有多参数示值显示功能,并具有与PC机接口的直流输出端口。在重要的监视场合它要求表计本身示值与到PC机的显示示值有较小的允差范围,否则无法根据示值来调节负荷,造成不必要的双方争执,所以在这里对表计自身示值与到PC机的延展示值的不确定度评定显得尤为重要。文中根据JJF1059-1999《测量不确定度评定与表示》标准中对不确定度的定义和评定要求,对电测量仪表检定装置的不确定度进行了分析,并以实例说明了数字功率表在作这种用途时示值误差测量结果的不确定度评定。更多还原

【Abstract】 The digital power meter has not only the function of the previous one but also the function of displayingmany parameters. It also has the direct current output end port which connects with PC. The range of the allowableerror is required between the meter value and PC display value on the important monitoring occassion, otherwise theload can’t be adjusted according to the expressive value resulting in the unnecessary conflict between the two sides.So it is particularly important for us to evaluate the uncertainty of the meter value and PC extended display value. Inthis paper the uncertainty of the inspection device of the electrical measuring instrument is analysed and the evaluationof uncertanty for the error measuring result of digital power value is explained with examples as well.更多还原