70 34980A Service Guide
3 Calibration Procedures
Analog Output Verification Test This procedure is used to check the calibration of
the analog outputs on the 34951A 4-channel DAC Module. Verification checks are
performed only for those output values with unique calibration constants.
1 Using the input test connector described on page 69, leave the current input terminal
open. Set the DMM to the 100 mA range. Make and record a current measurement.
This value will be used as an offset value during the output current zero verification.
2 Make voltage measurement connections to channel 1 of the module.
3 Set each output voltage value in the table below and make a measurement. Compare
measurement results to the appropriate test limits shown in the table.
4 Make current measurement connections to channel 1 of the module. Set the DMM to
the 100 mA range.
5 Set each output current value in the table below and make a measurement. Compare
measurement results to the appropriate test limits shown in the table. When
measuring the 0 mA output value, apply the offset value from step 1 to the measured
value.
6 Repeat steps 2 through 5 for channels 2, 3 and 4.
7 Remove the input test connector.
It is not necessary to test the voltage output at the full rated 10 mA load.
If you test the output using a load, connect the sense terminals.
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