Performance Tests and Calibration 5
U1241A/U1242A User’s and Service Guide 39
Basic Operating Test
Basic Operating Test is used to test the basic operability of the meter.
Repair is required if the meter fails the Basic Operating Test.
Backlight Test
To test the backlight function, press momentarily to turn backlight
ON at medium level of brightness intensity. Press again to toggle the high-
est level of brightness intensity. The backlight turns OFF automatically
after setting period. Alternatively, you can press for the third time
to turn the backlight OFF.
Testing the Display
To view all segments of the display, press and hold the button
while turning the rotary switch from OFF to any non- OFF position.
Compare the display with the Figure 5- 12.
Figure 5-12 Annunciator display
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