6 Performance Tests and Calibration
168 Keysight U1251B and U1252B User’s and Service Guide
Adjustment Procedure
Review the sections “Test Considerations” on page 152 and “Adjustments
Consideration” on page 166 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 161).
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 165).
8 Press to start the adjustment. The CAL flashes in the secondary display
to indicate that the calibration is in progress.
NOTE
The instrument will be in the adjustment mode, unless you press Shift and
simultaneously to exit the adjustment mode.
NOTE
Always complete the tests in the same order as shown in the appropriate table.
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