Keysight DAQ970A/DAQ973A Data Acquisition System
Service Guide
33
2 Calibration Procedures
Keysight Technologies Calibration Service 34
Calibration Interval 34
Time Required for Calibration 34
Automating Calibration Procedures 35
Recommended Test Equipment 36
Input Connections 37
Calibration Security 39
Calibration Message 44
Calibration Count 44
Recommended Calibration Procedure 45
Aborting a Calibration in Progress 45
Calibration Actions 46
Test Considerations 47
Calibration Adjustment Sequence 51
Internal DMM Adjustments 51
Zero Adjustment 52
Gain Adjustment 55
This section contains procedures for adjustment (calibration) of the instrument.
Closed-case electronic calibration The instrument uses closed-case electronic calibration; no
internal mechanical adjustments are required. The instrument requires the use of DAQM901A multiplexer
module installed in slot 300 to interface input test connections from output sources (see “Recommended
Test Equipment” on page 36). The instrument calculates correction factors based on reference signals that
you apply and stores the correction factors in non-volatile EEPROM memory. Non-volatile EEPROM
calibration memory does not change when power has been off, after a Factory Reset (*RST command), or
after an Instrument Preset (SYSTem:PRESet command).
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