Operations and Features 3
Keysight U8001A/U8002A User’s and Service Guide 45
System Related Operations
Reset to factory defaults
To reset the power supply unit to factory defaults, press and hold “Output On/Off”
button when power-up.
– The OVP and OCP are turned off and their values are set to maximum.
– The memory storage locations are cleared
.
– The voltage and current limit values are set to zero.
– The calibration values are intact.
Power-on self-test
A power-on self-test occurs automatically when the power supply unit is turned
on. This test ensures the unit is operational. The power-on self-test checks for
flash data memory and checks the voltage and current outputs when the unit is
off.
If the test fails, the display will show “Err” with the error code. See Appendix A:
List of Error Codes for more information.
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