AS IEC 61672.2-2004 (2004-04-20)AS IEC 61672.1-2004 (2004-04-20)
适用范围
Provides for four types of meter, viz. Types 0 and 1 for laboratory and precision use, Type 2 for general field applications, and Type 3 for field noise survey applications, with one or more frequency-weighting characteristics A, B and C and one or more