Re: [BLAST_SHIFTS] WC tripping

From: Aaron Joseph Maschinot (ajmasch@MIT.EDU)
Date: Sun Jun 22 2003 - 16:34:34 EDT


I don't understand this. On the ten or so boxes that were tripping, we
tried lowering the sense wire voltages to 3800V and eventually to 3700V.
We then pushed SET on the HV GUI. But the boxes continued to trip.

How permanent are changes made to the HV GUI using the SET button? I
understand that, if you completely reboot everything, then the changes
made with SET go away and the mySQL voltage values come back (to change
these values, i guess Adrian or Adam has to do it???). Is it that we'd
lower the sense wire voltage, then hit SET, but the mySQL values would
then over-write the SET values when we next tried to go to OPER mode
(thus putting the boxes back at 3900V)? I don't think that this is the
case, because once we changed a box's voltage, it would stay changed
(at least on the DV (desired voltage) screen) regardless of how many times
you went to OPER or not. Do the mySQL values overwite the SET values but
yet somehow NOT change the values on the HV GUI's WC DV screen? (boy,
how's that for using acronyms!)

aaron



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