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Basic Operating Test
Backlight test
Display test
U1271A/U1272A Service Guide
The tests listed below are used to test the basic operability
of the instrument. Repair is required if the instrument fails
the any of the tests.
•
"Backlight test"
•
"Display test"
•
"Current terminal input test"
Press and hold the
switch to any other position (OFF to ON). Check that the
multimeter's backlight is turned on. Press any key to exit
this mode.
Press and hold the
switch to any other position (OFF to ON). Check that all the
annunciators are displayed in the LCD. Compare the display
with the example shown in
this mode.
Figure 1-1 LCD display screen
Calibration Procedures
Basic Operating Test
button while turning the rotary
Setup
button while turning the rotary
Figure 1-
1. Press any key to exit
1
5
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