Technical data

Performance Tests and Calibration 4
34405A User’s and Service Guide 91
DC Voltage Gain Adjustment Procedure
Review the “Test Considerations” on page 67 and “Gain Adjustment
Considerations” on page 90 sections before beginning this procedure.
1 Press to enter DC Voltage Gain Calibration.
2 The primary display will show the uncalibrated value and the
secondary display will show the reference value of the Cal Item.
3 Configure each Cal Item shown in the adjustment table below.
4 Use (Auto) or (Range) to select the Cal Item.
5 Apply the input signal shown in the "Input" column of the table.
6 Enter the actual applied input (see “Entering Adjustment Values” on
page 86).
7 Press to start the adjustment. The CAL annunciator flashes to
indicate the calibration is in progress.
• Successful completion of each adjustment value is indicated by a
short beep and the primary display briefly showing PASS.
• An adjustment failure is indicated by a long beep, the primary
display showing FAiL and a calibration error number appearing in
the secondary display. Check the input value, range, function, and
entered adjustment value to correct the problem and repeat the
adjustment step.
8 Repeat steps 3 through 7 for each gain adjustment point shown in the
table.
DCV
NOTE
If the zero adjustment procedure has been recently performed prior to the DC Voltage gain
calibration procedure, the Cal Item 'Short' can be neglected.
NOTE
Always complete tests in the same order as shown in the appropriate table.
Disp