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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
600 V, 1000 V
60.0 A AmpTip™
60.00 A, 600.0 A, 1000 A
* DC bias must be less than 50% of the Sine RMS value.
Accuracy of Frequency Range
Display Range
xx.xx
xxx.x
Voltage
Measurement
EF
V
Hz
VFD
AC Voltage
Range
20 Hz to 50 Hz
600.0 V
± (1.5% + 0.5 V)
1000 V
± (1.5% + 5 V)
DC Voltage
Range
600.0 V
± (0.8% + 0.5 V
AC + DC Voltage (CM-1560 and CMI-1000 only)
Range
40 Hz to 50 Hz
600.0 V
± (1.8% + 0.7 V)
1000 V
± (1.8% + 7 V)
Input Impedance: 10 MΩ, 100 pF nominal
Sensitivity (Sine RMS)*
50 V
40 A
40 A
SELECT
Accuracy at
50 Hz to 60 Hz
± (0.8% + 0.5 V)
± (0.8% + 5 V)
Accuracy
Accuracy at
Accuracy at DC,
50 Hz to 60 Hz
± (1.0% + 0.7 V)
± (1.0% + 7 V)
CM-1360 • CM-1560 • CMH-1000 • CMI-1000
5.00 Hz ~ 999.9 Hz
40.00 Hz ~ 400.0 Hz
40.00 Hz ~ 400.0 Hz
Accuracy
± (1.0% + 0.05 Hz)
± (1.0% + 0.5 Hz)
Accuracy at
60 Hz to 200 Hz
± (1.5% + 0.5 V)
± (1.5% + 5 V)
Range
Accuracy
1000 V
± (0.8% + 5 V)
60 Hz to 200 Hz
± (1.8% + 0.7 V)
± (1.8% + 7 V)
Range
VFD
SELECT
Accuracy at
200 Hz to 400 Hz
± (10% + 0.5 V)
± (10% + 5 V)
Accuracy at
200 Hz to 400 Hz
± (12% + 0.7 V)
± (12% + 7 V)
Accuracy at
Accuracy at
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