1 Calibration Procedures
40 Keysight U1270 Series Service Guide
Using the Front Panel for Adjustments
This section describes the procedures to perform adjustments from the front
panel.
To unsecure the instrument, see “To unsecure the instrument from the front panel”
on page 36. Once unsecured, the reference value will be indicated on the display.
Adjustment considerations
1 Allow the instrument to warm up and stabilize for 3 minutes before performing
the adjustments.
2 Ensure that during the adjustments, the low battery indicator does not appear.
If the low battery indicator appears, replace the batteries as soon as possible
to avoid false readings.
3 Consider the thermal effects as you are connecting the test leads to the
calibrator and multimeter. It is recommended to wait for 1 minute before you
begin the calibration after connecting the test leads.
4 Before proceeding with the ambient temperature adjustment, be sure to turn
on the multimeter for at least 1 hour with the K-type thermocouple connected.
After each adjustment, the display shows PASS. If the calibration fails, the
instrument sounds a beep, and an error number is shown on the display.
Calibration error messages are described in “Calibration Error Codes” on
page 48.
Never turn off the multimeter during an adjustment. This may delete the
calibration memory for the present function.
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