Keysight U1271A - Current Terminal Input Test

1 Calibration Procedures
22 Keysight U1270 Series Service Guide
For U1271A/U1272A models:
Check that all the annunciators are displayed on the LCD screen. Compare the
display with the example shown in Figure 1-2. Press any key to exit this mode.
Figure 1-2 U1271A/U1272A LCD screen
Current terminal input test
This test determines if the input warnings of the current terminals are functioning
properly.
Input warning test (A terminal)
The multimeter sounds a continuous alert beep when the test lead is inserted into
the A terminal but the rotary switch is not set to the function.
The multimeter displays an input warning error (Figure 1-3).
Figure 1-3 Input warning display (A terminal)