40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m elog  Not logged in ELOG logo
Message ID: 7501     Entry time: Mon Oct 8 11:15:53 2012
Author: Jenne 
Type: Update 
Category: PSL 
Subject: PMC and FSS had a weird weekend 

Something bizarre-o was going on with the PMC and FSS over the weekend.  On the striptool, PMC's PZT looks like it was doing a sawtooth pattern for several hours.  I opened up the FSS screen, and the FSS SLOWDC had walked itself up to +10.  It's not supposed to get that far from 0. 

Here are some trends, so you can see what was going on.

10 day trend:  This weird behavior began ~Friday evening (FSS_SLOWDC ramps quickly).


1 day trend:  You can see the sawtooth pattern in PMC_PZT more clearly here.  It's at the same time as the FSS_SLOWDC is ramping rapidly, and the FSS_FAST is saturated.


Attachment 2: PMC_sawtooth_FSSweird_8Oct2012_1dayTrend.png  20 kB  | Show | Hide all | Show all
ELOG V3.1.3-