Fluke 789 Calibration Manual - Page 12

Specifications, DC Volts Measurement

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789 Calibration Manual Specifications All specifications apply from +18 °C to +28 °C unless stated otherwise. All specifications assume a 5-minute warm-up period. The standard specification interval is 1 year. Note "Counts" refers to the number of increments or decrements of the least significant digit. DC Volts Measurement Range (V dc) 4.000 40.00 400.0 1000 Resolution 0.001 V 0.01 V 0.1 V 1 V Accuracy, ±(% of Reading + Counts) 0.1 % + 1 0.1 % + 1 0.1 % + 1 0.1 % + 1 Input impedance: 10 MΩ (nominal), 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 DC Millivolts Measurement Range (mV dc) 400.0 Resolution 0.1 mV Accuracy, ±(% of Reading + Counts) 0.1 % + 2 AC Volts Measurement Range (ac) Resolution Accuracy, ±(% 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 40.00 V 400.0 V 1000 V 0.001 V 0.01 V 0.1 V 1 V 0.7 % + 2 0.7 % + 2 0.7 % + 2 0.7 % + 2 1.2 % + 4 1.2 % + 4 1.2 % + 4 1.2 % + 4 7.0 % + 4 7.0 % + 4 7.0 % + 4 7.0 % + 4 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 Input impedance: 10 MΩ (nominal), 60 dB at dc, 50 Hz, or 60 Hz 4

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789
Calibration Manual
4
Specifications
All specifications apply from +18
°
C to +28
°
C unless stated otherwise.
All specifications assume a 5-minute warm-up period.
The standard specification interval is 1 year.
Note
“Counts” refers to the number of increments or decrements of the least
significant digit.
DC Volts Measurement
Range (V dc)
Resolution
Accuracy,
±
(% of Reading + Counts)
4.000
0.001 V
0.1 % + 1
40.00
0.01 V
0.1 % + 1
400.0
0.1 V
0.1 % + 1
1000
1 V
0.1 % + 1
Input impedance: 10 M
Ω
(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
DC Millivolts Measurement
Range (mV dc)
Resolution
Accuracy,
±
(% of Reading + Counts)
400.0
0.1 mV
0.1 % + 2
AC Volts Measurement
Range (ac)
Resolution
Accuracy,
±
(% 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
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
Input impedance: 10 M
Ω
(nominal), <100 pF, ac-coupled
Common mode rejection ratio: >60 dB at dc, 50 Hz, or 60 Hz