出典:Wikipedia
出典:『Wikipedia』 (2011/07/20 22:49 UTC 版)
Accuracy classes are defined and used in IEC and ANSI standards. Classes are denoted by either a letter or percentage. For example, Class B is a temperature accuracy from IEC-751 that requires accuracy of +/- 0.15 degrees Celsius. Class 0.5 is an ANSI C12.20 accuracy class for electric meters with accuracy of +/- 0.5%.