Greenlee CM-750 Instruction Manual page 12

Accuracy
See the Specifications section for operating conditions and temperature coefficient.
Accuracy is specified as follows:
• 18 C to 28 C (64 F to 82 F) for voltage and resistance measurements
• 21 C to 26 C (70 F to 79 F) for current measurements
• 0% to 80% relative humidity
AC Current (21 C to 26 C) for CM-700*
Range
400.0 A
200.0 to 400.0
600 A
AC Current (21 C to 26 C) for CM-750**
Range
400.0 A
200.0 to 400.0
600 A
AC Voltage (18 C to 28 C) for CM-700* and CM-750**
Range
400.0 mV
4.000 V (1.5% + 0.005 V)
40.00 V
400.0 V
600 V
* CM-700 is average sensing, RMS calibrated.
** CM-750 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%
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(a percentage of the reading + a fixed amount) at
Input Value
0.0 to 40.0
40.0 to 200.0
400 to 600
Input Value
0.0 to 40.0
40.0 to 200.0
400 to 600
Accuracy
Unspecified
(1.5% + 0.05 V)
(1.5% + 0.5 V)
(1.5% + 5 V)
Accuracy (50 to 60 Hz)
(1.9% + 0.7 A)
(1.9% + 0.5 A)
(3.0% + 0.5 A)
(1.9% + 10 A)
Accuracy (50 to 60 Hz)
(1.9% + 0.7 A)
(1.9% + 0.5 A)
(3.5% + 0.5 A)
(1.9% + 10 A)
Frequency Response
Unspecified
40 to 300 Hz
40 to 500 Hz
Accuracy (60 to 400 Hz)
(2.5% + 0.7 A)
(2.5% + 0.5 A)
(3.6% + 0.5 A)
(2.5% + 10 A)
Accuracy (60 to 400 Hz)
(2.5% + 0.7 A)
(2.5% + 0.5 A)
(3.6% + 0.5 A)
(2.5% + 10 A)
Input Impedance
9 M , 100 pF