Model 787
Calibration Manual
6
DC Millivolts
Range (mV dc) Resolution Accuracy (% of Reading + Counts)
400.0 0. 1 mV 0.1 % + 1
Input impedance: 10 MΩ (nominal), < 100 pF
Normal mode rejection ratio: >60 dB at 50 Hz or 60 Hz
Common mode rejection ratio: >120 dB at dc, 50 Hz, or 60 Hz
Overvoltage protection: 1000 V
AC Volts
Range (ac) Resolution Accuracy
1
± ( % of Reading + Counts)
50 Hz to 60 Hz 45 Hz to 200 Hz 200 Hz to 500 Hz
400.0 mV 0.1 mV 0.7 % + 4 1.2 % + 4 7.0 % + 4
4.000 V 0.001 V 0.7 % + 2 1.2 % + 4 7.0 % + 4
40.00 V 0.01 V 0.7 % + 2 1.2 % + 4 7.0 % + 4
400.0 V 0.1 V 0.7 % + 2 1.2 % + 4 7.0 % + 4
1000 V 1 V 0.7 % + 2 1.2 % + 4 7.0 % + 4
1. Specifications are valid from 5 % to 100 % of amplitude range.
AC conversion: true rms
Maximum crest factor: 3
For non-sinusoidal waveforms, add ±(2 % reading + 2 % f.s.) typical.
Input impedance: 10 MΩ (nominal), < 100 pF, ac-coupled.
Common mode rejection ratio: >60 dB at dc, 50 Hz, or 60 Hz.
AC Current
Range
45 Hz to 2 kHz Resolution
Accuracy
1
± (% of Reading + Counts)
Typical Burden
Voltage
1.000 A 0.001 A 1% + 2 1.5 V/A
1. Specifications are valid from 5 % to 100 % of amplitude range.
AC conversion: true rms
Maximum crest factor: 3
For non-sinusoidal waveforms, add ± (2 % reading + 2 % f.s.) typical.
Input impedance: 10 MΩ (nominal), < 100 pF, ac-coupled.
Common mode rejection ratio: >60 dB at dc, 50 Hz, or 60 Hz.
DC Current
Range Resolution Accuracy
1
± (% of Reading + Counts) Typical Burden Voltage
30.000 mA 0.001 mA 0.05 % + 2 14 mV/mA
1.000 A
2
0.001 A 0.2 % + 2 1.5 V/A
1 Specifications are valid from 5 % to 100 % of amplitude range.
AC conversion: true rms
Maximum crest factor: 3
For non-sinusoidal waveforms, add ± (2 % reading + 2 % f.s.) typical.
Input impedance: 10 MΩ (nominal), < 100 pF, ac-coupled.
Common mode rejection ratio: >60 dB at dc, 50 Hz, or 60 Hz.
2 400 mA continuous, 1A 30 seconds maximum. Overload protection: 440 mA, 1000V fast-blow fuse.
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