台湾益和MICROTEST单相功率电表

1-50阶电压电流失真百分比V[n%]、A[n%]

1-50阶瓦特W[n]

1-50阶瓦特失真百分比W[n%]

1-50阶电压与电流角度DEG[n]

Vrms，Irms，Watt， PF

7110-10K-HARM

7120-100K-HARM

500Hz -3db 基于Butterworth 之数位滤波器

50Hz -0.03% reading， 60Hz -0.05% reading

F单位为1KHz

当L-FILTER 设定ON: 45Hz~66Hz频段容许误差-0.03 %~-0.05 of reading 

AC量测时基频频率超过200Hz时需将F-Filter关掉以量得*准确读值

**超过10KHz 以上频段7120才有支援

DC ±0.2% reading ± 0.5% of range

15 Hz≦f

45 Hz≦f≦66 Hz ±(0.1% of reading + 0.1 % of range)

66 Hz<f≦1 kHz ±(0.2% of reading + 0.2 % of range)

1 kHz<f≦10 kHz ±(0.4% of reading + 0.3 % of range)± [{0.06×(f)}% of reading]

10 kHz<f≦100 kHz ±(0.5 % of reading + 0.5 % of range)±[{0.09×(f–10)}% of reading]

当功率因素PF 为0时,Watt的误差范围为

情况1: for 45 Hz<f

情况2: for 45 Hz>f 或f >66 Hz

Add ±{(3.5 + 0.5 × f)% of VA} for up to 100 kHz as reference data

The unit for frequency f is kHz.

当功率因素0 < PF ≦ 误差范围

When 0<PF≦1 (θ: phase angle of the voltage and current)

for 45 Hz≦f≦66 Hz. Add ± power reading *{tan(θ)*(0.5)}%

for f < 45 Hz, f >66 Hz. Add ± power reading *{ tanθ* (0.5×f+0.2) }%