Fluke 2680A User Manual page 216

2680A/2686A
Users Manual
FAI Module AC Voltage Measurement Specifications
The following tables provide FAI Module specifications for the ac voltage
function.
Specification
Input Impedance
Maximum Crest Factor
Crest Factor Error
Common Mode Rejection
Maximum Input Voltage
Maximum Volt-Hertz
Product
Temperature Coefficient
Accuracy at -20 °C
DC Component Error
Table A-26. FAI Module AC Voltage Range and Resolution Specifications
Range
Full Scale
300 mV
3 V
30 V
A-20
Table A-25. FAI Module AC Voltage General Specifications
1 MΩ in parallel with 100 pF
3.0 maximum; 2.0 for rated accuracy
For nonsinusoidal input signals with crest factors between 2
and 3 and pulse widths >=100 µs, add 0.2% to the accuracy
specifications.
80 dB minimum at dc, 50 Hz/60 Hz +0.1%, 1 kΩ imbalance,
Slow Rate
The lesser voltage of:
30 V ac rms from any input terminal to earth.
30 V ac rms from any terminal input to any other input terminal.
6
2x10 Volt-Hertz product on any range, normal mode input.
6
1x10 Volt-Hertz product on any range, common mode input.
Linear interpolation between 2 applicable points for
temperatures between 28 °C and 60 °C, or -10 °C and 18 °C,
e.g., if the applicable specification at 28 °C is 2% and the
specification at 60 °C is 3%, then the specification at 40 °C is
(3%-2%)x(40-28)/(60-28)+2%=2.375%.
Multiply the -10 °C to +60 °C accuracy specification by 2. After
1 hour warm-up. For accuracy between -10 °C and -20 °C,
interpolate linearly.
The presence of a dc voltage will cause an indeterminate error
in the reading of the ac voltage on the input.
Slow
+30,000
10 µV
100 µV
1 mV
Characteristic
Resolution
Fast
+3,000
100 µV
1 mV
10 mV
Minimum Input for
Rate Accuracy
20 mV
200 mV
2 V