146 Agilent U1251A/U1252A User’s and Service Guide
7 Performance Tests and Calibration
Adjustment Procedure
Review the sections “Test Considerations” on page 128 and 
“Adjustments Consideration” on page 144 before proceeding 
with this procedure. 
1 Turn the rotary switch to “Test Function” position as 
shown in the adjustment table.
2 After unsecuring the instrument, the instrument goes into 
the adjustment mode.(See “Unsecuring the Instrument for 
Calibration” on page 139)
3 The primary display will show the reference value of the 
Cal Item.
4 Configure each Cal Item.
5 Use the   and the   arrow keys to select the 
Cal Range. 
6 Apply the input signal shown in the Input column of the 
table. The bar graph will display the Input reading. There 
is no bar graph display for temperature adjustment. 
7 Enter the actual applied input (see “Entering Adjustment 
Values” on page 143).
The instrument will be in the adjustment mode, unless you Press SHIFT 
and   simultaneously to exit the adjustment mode.
Always complete the tests in the same order as shown in the appropriate 
table.