Technical data

Performance Tests and Calibration 1
Adjustments
34450A Service Guide 35
AC current gain adjustment procedure
Review the “Test Considerations” on page 5 and “Gain adjustment
considerations” on page 29 sections before beginning this procedure.
AC voltage gain adjustment for 100 mV range calibration has to be done
prior to performing the AC current gain adjustments procedure.
Calibration Mode: AC current
1 Press or to select the calibration range.
2 The Measurement box displays the uncalibrated value and the
Calibration Point box displays the reference value.
3 Apply the input signal shown in the Calibration Point Box.
4 Press to start the adjustment. The Status box displays
CALIBRATING indicates the calibration is in progress.
• Successful completion of each adjustment value is indicated by a
message in the Status box showing PASS.
• An adjustment failure is indicated by a message in the Status box
showing FAIL. Check the input value, range, function, and entered
adjustment value to correct the problem and repeat the adjustment
step.
5 Repeat step 1 through 4 for each gain adjustment point shown in the
preset calibration point box.
6 When the calibration has been completed for the selected range, the
status box shows DONE, and the value in the Calibration Range box
flashes.
7 Increase the range and continue the calibration by repeating steps 1
through 4.
8 Verify the AC current gain adjustments using the “AC current
verification test” on page 19.
Table 1-14 AC current gain adjustment
Input Instrument Settings
Current, rms Frequency Function Range
1 mA, 7 mA, 10 mA 1 kHz AC current 10 mA
10 mA, 70 mA, 100 mA 1 kHz 100 mA