Typical Measurements And Accuracy - Greenlee CMI-2000 Manual De Instrucciones

Typical Measurements and Accuracy

Refer to the "Specifications" section 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).
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
Sensitivity
Function
(Sine RMS)*
6.000 V
60.00 V
600.0 V
1000 V
200.0 A
2000 A
6.000 V VFD 0.6 V ~ 2.4 V†
60.00 V VFD 6 V ~ 24 V†
600.0 V VFD 60 V ~ 240 V†
* DC bias must be less than 50% of the Sine RMS value.
** If DC bias is present, it shall not exceed 100 V.
† Sensitivity decreases from 10% full scale at 200 Hz to 40% full scale at 400 Hz.
AutoCheck™ Measurements
LoZ
AC Voltage AutoCheck™ Mode
Range
6.000 V
60.00 V
600.0 V
1000 V
* Input > 1.5 VAC.
Input Impedance: LoZ (refer to LoZ section of "Using the Features")
2.000 V
20.00 V
40.0 Hz ~ 1999 Hz
100.0 V
600 V**
10.0 A
20 Hz ~ 400 Hz
100 A
10 Hz ~ 400 Hz
Accuracy at
50 Hz to 60 Hz
± (1.5% + 0.005 V)*
± (1.5% + 0.05 V)
± (1.5% + 0.5 V)
± (1.5% + 5 V)
Accuracy of Frequency Range
Range
DC Voltage AutoCheck™ Mode
Range
6.000 V
60.00 V
600.0 V
1000 V
* Input > +1.5 VDC or < -1.5 VDC.
Display Range
xxx.x ± (0.1% + 0.4 Hz)
xxxx ± (0.1% + 4 Hz)
LoZ
Accuracy
± (1.3% + 0.005 V)*
± ( 1.3% + 0.05 V)
± (1.3% + 0.5 V)
± (1.3% + 5 V)
CMI-2000
Accuracy
11