CM-1360 • CM-1560 • CMH-1000 • CMI-1000
11
Typical Measurements and Accuracy
Refer to the “Specifications” section for operating conditions and temperature coefficient.
Accuracy is specified as follows: ± (a percentage of the r 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, 1000 V
50 V
5.00 Hz ~ 999.9 Hz
60.0 A AmpTip™
40 A
40.00 Hz ~ 400.0 Hz
60.00 A, 600.0 A, 1000 A
40 A
40.00 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
V
Hz
EF
VFD
SELECT
SELECT
VFD
AC Voltage
Range
Accuracy at
20 Hz to 50 Hz
Accuracy at
50 Hz to 60 Hz
Accuracy at
60 Hz to 200 Hz
Accuracy at
200 Hz to 400 Hz
600.0 V
± (1.5% + 0.5 V)
± (0.8% + 0.5 V)
± (1.5% + 0.5 V)
± (10% + 0.5 V)
1000 V
± (1.5% + 5 V)
± (0.8% + 5 V)
± (1.5% + 5 V)
± (10% + 5 V)
DC Voltage
Range Accuracy
Range Accuracy
600.0 V
± (0.8% + 0.5 V
1000 V
± (0.8% + 5 V)
AC + DC Voltage (CM-1560 and CMI-1000 only)
Range
Accuracy at
40 Hz to 50 Hz
Accuracy at DC,
50 Hz to 60 Hz
Accuracy at
60 Hz to 200 Hz
Accuracy at
200 Hz to 400 Hz
600.0 V
± (1.8% + 0.7 V)
± (1.0% + 0.7 V)
± (1.8% + 0.7 V)
± (12% + 0.7 V)
1000 V
± (1.8% + 7 V)
± (1.0% + 7 V)
± (1.8% + 7 V)
± (12% + 7 V)
Input Impedance: 10 MΩ, 100 pF nominal
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