電流電壓都是真均方根值 (True RMS)
漏電 電流解析度最小是 10 μ A
電流電壓諧波分析可高達 99 次
99 次 諧波分析可更了解高頻諧波影響 ( 可高達 5/6 KHz)
鉤錶 方式，可做線上 諧波分析，不影響正常操作
諧波總量百分比（ %THD-F ）分析

MODEL PROVA 19, 21, 23
True RMS value (V and A)
Leakage Current Measurement at 10 μ A
Resolution
Harmonic Analysis (V and A) to the 99 th
Order
Better Understanding of High Frequency
Harmonic Analysis (up to 5/6 KHz)
Non-interrupted Harmonic Analysis
Analysis of Total Harmonic Distortion (THDF)
Analysis of Crest Factor (C.F.)
Fast Peak Function (33 μ s and 39 μ s)
Programmable CT Ratio (1 to 250)
Model 21(50A) and 23(100A)
W, KW, H.P.
VA, KVA, VAR, KVAR
PF, Phase Angle ( Φ )
Energy (mWH, WH, KWH)
Analysis of Standby Power Consumption
Balanced 3 Φ Power Quality
Balanced 3 Φ Sequence