Keysight U1271A - Introduction; About This Manual

Calibration Procedures 1
Keysight U1270 Series Service Guide 21
Basic Operating Test
The tests listed below are used to test the basic operability of the instrument.
Repair is required if the instrument fails any of these tests.
– “Backlight test (U1271A/U1272A only)”
– “Display test”
– “Current terminal input test”
Backlight test (U1271A/U1272A only)
Press and hold the key while turning the rotary switch to any other position
(OFF to ON). Check that the multimeter’s backlight is turned on. Press any key to
exit this mode.
Display test
Press and hold the key while turning the rotary switch to any other position
(OFF to ON).
For U1273A/U1273AX models:
Check that all the OLED pixels are lit. Verify that there are no dead pixels. Press
any key to exit this mode.
Figure 1-1 U1273A/U1273AX OLED display screen
Setup
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