3 Calibration Procedures
36 Keysight 34980A Service Guide
Calibration Message
The instrument allows you to store a message in calibration memory.
You may store a calibration message for the mainframe, the DMM, the 34951A
4-Ch Isolated DAC Module, and 34952A Multifunction Module.
For example, you can store such information as the date when the last calibration
was performed, the date when the next calibration is due, the instrument’s serial
number, or even the name and phone number of the person to contact for a new
calibration.
– You can record a calibration message only from the remote interface and only
when the instrument is unsecured. You can read the calibration message
whether the instrument is secured or unsecured.
– The calibration message may contain up to 40 characters.
– Remote Interface Commands:
CALibration:STRing <string>,{<slot>|MAINframe|DMM}
CALibration:STRing? {<slot>|MAINframe|DMM}
Calibration Count
You can query the mainframe, the DMM, the 34951A 4-Ch Isolated DAC Module,
and 34952A Multifunction Module to determine how many calibrations have been
performed. Note that your instrument was calibrated before it left the factory.
When you receive your instrument, be sure to read the count to determine its
initial value.
– The calibration count increments up to a maximum of 2
32
after which it rolls
over to “0”. Since the value increments by one for each calibration point, a
complete calibration may increase the value by many counts.
– The calibration count is also incremented with calibrations of the 34951A 4-Ch
DAC and DAC channels on the 34952A multifunction module.
– Remote Interface Command:
CALibration:COUNt? {<slot>|MAINframe|DMM}
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