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Accuracy
Refer to "Specifications" for operating conditions and temperature coefficient.
Accuracy is specified as follows: ± (a percentage of the reading + a fixed amount) at
18 °C to 28 °C (64 °F to 82 °F), 0% to 80% relative humidity
AC Current
Range
400.0 A
60.1 to 400.0
1000 A
* ± (1.9% + 1.1 A) for CM-1350.
** ± (2.5% + 1.1 A) for CM-1350.
± 1.0% position error
AC Voltage
Range
± (1.0% + 0.5 V)*
400.0 V
± (1.0% + 5 V)
750 V
* Below 60.0 V, accuracy is ± (1.0% + 0.9 V) for CM-1350.
CM-1300 is average sensing, RMS calibrated.
CM-1350 is true RMS sensing. Accuracy is specified for sine waves at full scale and non-sine
waves below half scale. For non-sine waves, add the following crest factor corrections:
• Crest factor 1.4 to 2.0, add 1.0%
• Crest factor 2.0 to 2.5, add 2.5%
• Crest factor 2.5 to 3.0, add 4.0%
Input Value
0.0 to 60.0
401 to 1000
Accuracy
Accuracy (50 to 60 Hz)
± (1.9% + 0.7 A)*
± (1.9% + 0.5 A)
± (1.9% + 5 A)
Frequency Response
50 to 500 Hz
CM-1300 • CM-1350
Accuracy (61 to 400 Hz)
± (2.5% + 0.7 A)**
± (2.5% + 0.7 A)
± (2.5% + 7 A)
Input Impedance
1 MΩ || < 100 pF
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