Amprobe DM-4 Power-Quality-Recorder - Manual (Page 44)

13.1.6 Measurement of Harmonics
13.1.7 Temperature Drift
Temperature drift: 0.1 x accuracy/K
13.1.8 Safety
Insulation: Class 2
Pollution: 2
Over-voltage category: CAT III 600V~ (Phase-phase)
CAT II 1000V~ (Phase-Phase)
43
DM-4 Power Quality Recorder
Voltage
Range Accuracy Resolution
DC – 25h
26h – 33h
34h – 51h
±(5.0%+2digit)
±(10.0%+2digit)
±(15.0%+2digit)
0.1V
The voltage harmonics will be null under the following threshold:
- DC: if <1V or <2% of 1st harmonic
- 1st harmonic: if <2V
- 2nd - 51st: if <1V or <2% 1st harmonic
Current
Range Accuracy Resolution
DC – 25h
26h – 33h
34h – 51h
±(5.0%+2digit)
±(10.0%+2digit)
±(15.0%+2digit)
0.1A
The voltage harmonics will be null under the following threshold:
- DC: if <2% of 1st harmonic or < 0,2% of clamp full scale
- 1st harmonic: if < 0,2% of clamp full scale
- 2nd - 51st: if<2% 1st harmonic or < 0,2% of clamp full scale
Setting the FLEX option 3000A CT the DC component will be ignored.