Greenlee CM-450 Manuel D'instructions page 13

Accuracy
Refer to "Specifications" 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), 0% to 75% relative humidity.
True RMS readings: Voltage is specified from 5% to 100% of the range, and AC
current is specified from 10% to 100% of the range, unless otherwise specified.
Frequency must be within the specified bandwidth for non-sinusoidal waveforms.
Crest factors are as follows:
• Crest Factor < 1.75 at full scale
• Crest Factor < 3.5 at half scale
AC Current
Measurement Range
0.40 to 40.00 A
40.0 to 400.0 A
400 to 600 A
• Adjacent conductor influence < 0.05 A/A
• Add 2% if the conductor is beyond the position error marks.
• Multiply the fixed error amount times 2 below 10% of range.
AC Voltage
Measurement
Range
4.000 V
40.00 V
400.0 V
600 V
DC Voltage
Measurement Range
400.0 mV
4.000 V
40.00 V
400.0 V
600 V
* The high impedance on this range will produce significant non-zero readings
when the test leads are disconnected from a circuit.
Accuracy
± (1.5% + 0.08 A)
± (1.5% + 0.8 A)
± (1.5% + 8 A)
Accuracy
± (1.5% + 0.005 V)
± (1.5% + 0.05 V)
± (1.5% + 0.5 V)
± (2.0% + 5 V)
Accuracy
± (0.3% + 0.4 mV)
± (0.5% + 0.003 V)
± (0.5% + 0.03 V)
± (0.5% + 0.3 V)
± (1.0% + 4 V)
Frequency Range
50 to 60 Hz
Frequency
Range
50 to 500 Hz
Input Impedance
1000 MΩ*
CM-450
Input
Impedance
10 MΩ // 30 pF
nom.
10 MΩ
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