User manual

Calibration Procedures 1
Using the Front Panel for Adjustments
U1271A/U1272A Service Guide 23
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 19. Once unsecured, the
reference value will be indicated on the primary display.
Figure 1-8 rEF 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 handheld multimeter. It is
NOTE
After each adjustment, the secondary display shows . If the
calibration fails, the multimeter sounds a beep, and an error number is
shown in the secondary display. Calibration error messages are described
in “Calibration Error Codes” on page 31.