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789/787B
Calibration Manual
6
AC Current Measurement
Range
45 Hz to 2 kHz
Resolution
Accuracy,
±(% of Reading + Counts)
Typical Burden
Voltage
1.000 A (Note) 0.001 A 1 % + 2 1.5 V/A
Note: 440 mA continuous, 1 A 30 seconds maximum
Specifications are valid from 5 % to 100 % of amplitude range.
AC conversion: true rms
Maximum crest factor: 3 (between 50 and 60 Hz)
For non-sinusoidal waveforms, add
±
( 2 % reading + 2 % f.s.) typical
Overload protection 440 mA, 1000 V fast-blow fuse
DC Current Measurement
Range Resolution
Accuracy
±(% of Reading + Counts)
Typical Burden
Voltage
30.000 mA 0.001 mA 0.05 % + 2 14 mV/mA
1.000 A (Note) 0.001 A 0.2 % + 2 1.5 V/A
Note: 440 mA continuous, 1 A 30 seconds maximum
Overload protection: 440 mA, 1000 V fast-blow fuse
Ohms Measurement
Range Resolution Measurement Current
Accuracy
±(% of Reading + Counts)
400.0 Ω 0.1 Ω 310 μA 0.2 % + 2
4.000 kΩ 0.001 kΩ 31 μA 0.2 % + 1
40.00 kΩ 0.01 kΩ 2.5 μA 0.2 % + 1
400.0 kΩ 0.1 kΩ 250 nA 0.2 % + 1
4.000 MΩ 0.001 MΩ 250 nA 0.35 % + 3
40.00 MΩ 0.01 MΩ 125 nA 2.5 % + 3
Overload protection: 1000 V
Open circuit voltage: <3.9 V
Frequency Counter Accuracy
Range Resolution
Accuracy
±(% of Reading + Counts)
199.99 Hz 0.01 Hz 0.005 % + 1
1999.9 Hz 0.1 Hz 0.005 % + 1
19.999 kHz 0.001 kHz 0.005 % + 1
Display updates 3 times/second at >10 Hz
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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