Fluke NetDAQ 2640A, Service Manual

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Introduction and Specification
Specifications
1
1-13
2640A Specifications 1-20.
This section includes specifications specific to the 2640A instrument by measurement
function.
2640A DC Voltage Measurement Specifications 1-21.
Tables 1-13 to 1-15 provide 2640A specifications for the dc voltage measurement
function.
Table 1-13. 2640A DC Voltage General Specifications
Specification Characteristic
Input Impedance 100 M
Ω
in parallel with 300 pF maximum for ranges <=3V
10 M
Ω
in parallel with 100 pF maximum for ranges >3V
Normal Mode Rejection 50 dB minimum at 50 Hz/60 Hz +0.1%, Slow Rate
Common Mode Rejection 120 dB minimum at dc, 50 Hz/60 Hz +0.1%, 1 k
Ω
imbalance, Slow
Rate
80 dB minimum at dc, 50 Hz/60 Hz +0.1%, 1 k
Ω
imbalance, Medium
and Fast Rates
Channel-to-Channel Crosstalk 120 dB minimum Slow Rate (e.g., 30V dc on channel 1 may cause a
30
µ
V error on channel 2)
100 dB minimum Medium and Fast Rates (e.g., 1V dc on channel 1
may cause a 10
µ
V error on channel 2)
Temperature Coefficient For % input: Add 1/10th the 90-day specification per
°
C above 28
°
C
or below 18
°
C
For floor error (V): Add 1/20th the 90-day specification per
°
C above
28
°
C or below 18
°
C
Maximum Input Voltage The lesser voltage of:
300V from any terminal on channels 1 and 11 to earth;
150V from any terminal on channels 2 through 10, and 12 through 20
to earth;
300V from any terminal on channels 1 and 11 to any other terminal;
150V from any terminal on channels 2 through 10, and 12 through 20
to any other input terminal
Table 1-14. 2640A DC Voltage Range and Resolution Specifications
Resolution
Range
Slow Fast
90 mV 0.3
µ
V 1
µ
V
300 mV 1
µ
V 3
µ
V
3V 10
µ
V 30
µ
V
30V 100
µ
V 300
µ
V
150V/300V 1 mV 3 mV
Note 300V range applies to channels 1 and 11 only.