Performance Tests and Calibration 4
34405A User’s and Service Guide 107
Capacitance Gain Adjustment Procedure
Review the “Test Considerations” on page 71 and “Gain 
Adjustment Considerations” on page 95 sections before 
beginning this procedure. 
1 Press  to enter Capacitance Gain Calibration. 
2 The primary display will show the calibration value and 
the secondary display will show the reference value of 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 91).
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.
NOTE
If the zero adjustment procedure has been recently performed prior to  
Capacitance gain calibration procedures, the Cal Item 'Short' can be 
neglected.
NOTE
Always complete tests in the same order as shown in the appropriate 
table.
Disp
34405A users guide.book  Page 107  Saturday, September 2, 2006  3:38 PM