功率電錶
7120

• 1-50總諧波失真、1-50階電壓電流V[n]、A[n]
• 1-50階電壓電流失真百分比 V[n%]、A[n%]
• 1-50階瓦特W[n]
• 1-50階瓦特失真百分比W[n%]
• 1-50階電壓與電流角度DEG[n]
• Vrms，Irms，Watt， PF

500Hz -3db 基於Butterworth 之數位濾波器 

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

  F單位為 1KHz

  當L-FILTER 設定ON:  45Hz~66Hz頻段容許誤差-0.03 %~-0.05 of reading 

  AC量測時基頻頻率超過200Hz時需將F-Filter關掉以量得最準確讀值

  (超過 10KHz 以上頻段7120才有支援)

  AC power ranges (Auto or Manual)(40 ranges)範圍up to 16KW

  最大Power(W)值依電壓檔位最高量程而定

  DC ±0.2% reading ± 0.5% of range

• 15 Hz≦f
• 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]

• 頻率介於45 to 66 Hz: Add 0.3% of reading
• 頻率於45 to 66 Hz:範圍以外 Add 1% of reading

  當功率因素PF 為0時,Watt的誤差範圍為

• 情況1: for 45 Hz<f
• 情況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.

  當功率因素0 < PF ≦ 誤差範圍

  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) }%