Textron GREENLEE CM-800 Manuel D'instructions page 12

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
60.0 to 400.0
600 A
* ± (1.9% + 1.1 A) for CM-850.
** ± (2.5% + 1.1 A) for CM-850.
± 1.0% position error
AC Voltage
Range
± (1.0% + 0.5 V)*
400.0 V
± (1.0% + 5 V)
600 V
* Below 60.0 V, accuracy is ± (1.0% + 0.9 V) for CM-850.
CM-800 is average sensing, RMS calibrated.
CM-850 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%
12
Input Value
0.0 to 60.0
400 to 600
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
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