A-27. 2645A Ac Voltage General Specifications - Fluke NetDAQ 2640A User Manual

2645A AC Voltage Measurement Specifications
Tables A-27 to A-29 provide 2645A specifications for the ac voltage measurement
function.
Table A-27. 2645A AC Voltage General Specifications
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
Characteristic
1 M in parallel with 100 pF
3.0 Maximum
2.0 for rated accuracy
For non-sinusoidal input signals with crest factors
between 2 and 3 and pulse widths 100 µs, add
0.2% to the accuracy specifications.
80dB minimum at dc, 50 Hz/60 Hz 0.1%, 1 k
imbalance, Slow Rate
The lesser voltage of:
30V ac rms from any input terminal to earth.
30V 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 28ºC and 60ºC, or -10ºC
and 18ºC, e.g., if the applicable specification at
28ºC is 2% and the specification at 60ºC is 3%,
then the specification at 40ºC 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.
Specifications
A
2645A Specifications
A-23.
A-19