Owners Manual

CM-660 • CM-860 • CM-960 • CMH-600 • CMI-600
13
Typical Measurements and Accuracy
Refer to the “Specifications” section for operating conditions and temperature
coefficient.
Accuracy is specified as follows: ± (a percentage of the reading + a fixed amount) at
23 °C ± 5 °C (73.4 °F ± 9 °F).
Frequency must be within the specified bandwidth for non-sinusoidal waveforms.
Crestfactors, unless otherwise specified, are as follows:
• Crest factor < 2.5:1 at full scale
• Crest factor < 5.0:1 at half scale
Frequency
Function Sensitivity (Sine RMS)* Range
600 V 50 V 5.00 Hz ~ 999.9 Hz
60.0 A AmpTip™ 40 A 50.00 Hz ~ 400.0 Hz
60.00 A, 600.0 A 40 A 50.00 Hz ~ 400.0 Hz
* DC bias must be less than 50% of the Sine RMS value.
Accuracy of Frequency Range
Display Range Accuracy
xx.xx ± (1.0% + 0.05 Hz)
xxx.x ± (1.0% + 0.5 Hz)
Voltage Measurement
VHz
EF
VFD
SELECTSELECT
VFD
AC Voltage
Range
Accuracy at
50 Hz to 60 Hz
600.0 ± (1.0% + 0.5 V)
DC Voltage
Range Accuracy
600.0 ± (1.0% + 0.5 V)
AC + DC Voltage
(CM-960, CMI-600 only)
Range
Accuracy at DC,
50 Hz to 60 Hz
600.0 ± (1.2% + 0.7 V)
Input Impedance: 10 MΩ, 100 pF nominal