Calibration Procedures 2
Keysight DAQ970A/DAQ973A Service Guide 51
Calibration Adjustment Sequence
Given the sensitivity of the 6.5 digits internal DMM within the DAQ970A/
DAQ973A, it is imperative to follow the calibration sequence as stated below:
Internal DMM Adjustments
The DAQM901A multiplexer module will be needed to perform the following
procedures. The module must be installed in slot 300.
Sequence Functions Section
1 Zero and ADC calibration Zero adjustment
2 AC voltage low frequency gain and flatness calibration Gain adjustment
3 AC voltage gain and flatness calibration Gain adjustment
4 AC current gain and flatness calibration Gain adjustment
5 AC zero calibration Zero adjustment
6 Frequency accuracy calibration Gain adjustment
7 DC voltage gain calibration (≤10 V) Gain adjustment
8 Ohms gain calibration (4-wire and 2-wire) Gain adjustment
9 DC current gain calibration Gain adjustment
10 DC high voltage gain calibration (≥100 V) Gain adjustment
11 Capacitance zero calibration Zero adjustment
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