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User name stevensm
Log entry time 10:54:47 on May20,2002
Entry number 3754
keyword=Right Q3 polarity problem
Right Q3 would not respond to a remote control polarity reversal command. The power supply gui apparently read back incorrect polarity status - that is, when the command to go to positive polarity was given, the gui said positive. But the power supply did not physically change polarity. On closer examination, we found that the local controls did not function either. We suspect that the problem lies in the "0 output" interlock circuit of the power supply. We manually changed the position of the polarity switch, and left the hall.