30 U8001A/U8002A User’s and Service Guide
3 Operations and Features
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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