Performance Tests and Calibration 5
Keysight U1241B and U1242B User’s and Service Guide 63
Basic Operating Test
Basic Operating Test is used to test the basic operability of the multimeter. Repair
is required if the multimeter 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 highest 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 5-1.
Figure 5-1 Annunciator display
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