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
N O T E
If the zero adjustment procedure has been recently performed prior to the DC Voltage gain
calibration procedure, the
Cal Item
'Short' can be neglected.
N O T E
Always complete tests in the same order as shown in the appropriate table.
Disp
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