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HV alarms

  • Red alarm may happen during ramping up and down due to overcurrent ("oc") or overvoltage ("ov"). No action is required.
  • Red alarm and white alarm may indicate a HV trip.
    • In case of TRIP, open HV panel identify the tripped channel ('stat' says TRIP) and reset it by turning it "off" and then "on" (power cycling).
      • If the trip was due to a spike of background the power cycle will cure the problem.
      • If it keeps tripping, turn this channel off and mask it (with button on the right of the HV panel).
      • Page the IFR OpMan in case of frequent trips.
    • A "white" alarm can be due to a trip status not promptly acknowledged. In fact, a tripped HV channel ramps down to zero voltage and when it is close to zero, EPICS sends a white alarm. Also in this case try to recover the channel by power cycling

Last modified: 07 January 2004, 14:26:42
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