1 Calibration Procedures
Using the Front Panel for Adjustments
18 U1231A/U1232A/U1233A 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 13. 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 Check that the battery levels are at least at two bars
before performing any adjustments. This ensures 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 handheld 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 briefly. If the calibration
fails, the multimeter sounds a beep, and an error number is shown in the
display briefly. Calibration error messages are described in “Calibration
Error Codes” on page 28.
Never turn off the multimeter during an adjustment. This may delete
the calibration memory for the present function.
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