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User name R. Michaels
Log entry time 15:28:07 on February20,2014
Entry number 385978
This entry is a followup to: 385972
Followups:
keyword=HV modules ok for lower crateI tested the HV modules that were in the lower crate. They all work fine in the HV crate on the floor. Below is a snapshot at a high voltage. Some lower voltages were checked with a voltmeter, too.
Slots 2 and 4 are 1461N. Slot 8 is a 1461P. Slot 12 is 1471N (was being used by VDC).
Actually, the failure symptoms in lower crate were different.
The two 1461 would only go between 0 and -34V. If you ask for -50V they'd stop at -34.
The 1461P would not operate.
The 1471N would start to ramp up and trip (all channels, even if VDC unplugged).
It looks like a crate/PS problem. I will talk to Jack and Chuck
FIGURE 1
