FLIR CM174 - Electrical Measurement Details

FLIR CM174 USER MANUAL Document Identifier: CM174-en-US_AC
33
7.3 Electrical specifications
Accuracy is ± (% reading + number of digits (dgt)) at 73.4 °F ±9 °F (23°C ±5 °C), <80% RH.
Table 7.1 Voltage (TRMS)
Function
Range
Accuracy (of reading)
DCV
60.00V
± (1.0% + 5 dgt)
600.0V
1000 V
ACV
60.00 V
±(1.0% + 5 dgt)
45~400 Hz
600.0 V
1000 V
ACV VFD
60.00 V
± (1% + 5 dgt) 45~65 Hz
± (5% + 5 dgt) 65~400 Hz
600.0 V
1000 V
Lo Z (Low Impedance)
Range, resolution, and accuracy specifications for Low
Impedance (Lo Z) measurements are the same as DCV,
ACV, and VFD specifications shown above
Notes:
LCD Displays ‘0’ counts when the AC reading is <10 counts
Overload protection: 1000V (rms)
Input impedance: 10 MΩ //, <100 pF
Lo Z input impedance: 2.5kΩ
AC conversion type: AC coupled, true RMS responding, calibrated to the RMS value of a sine wave
input. Accuracies are given for sine waves at full scale and non-sine waves below half scale.
If the meter measures a 4000-count signal and the Crest Factor of the signal is more then 3.0, the
reading may not meet specified tolerances. For non-sine waves (50/60 Hz), add the following Crest
Factor corrections:
For non-sine waves (50/60 Hz), add the following crest factor corrections:
For a crest factor of 1.0–2.0, add 3.0% to the accuracy.
For a crest factor of 2.0–2.5, add 5.0% to the accuracy.
For a crest factor of 2.5–3.0, add 7.0% to the accuracy.