Here is an update on the instruction for untripping seismic, with some new tips from Fabrice, especially for ETMX.
Untrip HEPI WD, use Commands2 window to isolate level 1 on all chambers except BS which is level2
Untrip ISI WD (you may need to raise T240 Threshold)
reset CPS offsets,
Check that everything is in high gain: (this is also good to check if you are already isolated but have a lot of motion)
If you have been struggling with switching the blend filters, you may want to zero the T240s. You can do this in the three T240 screens by tuning on the AutoZ filter module in the X filter module, then turning it off.
Use commands, isolate level 3 for most chambers. For ETMX start with Commands, Isolate Stage 1 Level 2. Once this script is finished, isolate stage 2 level 3.
Switch Blends:
good luck...
We just tried again. The following sequence seems robust for ETMX:
a) Isolate Stage 1 Level 2
b) Isolate Stage 2 Level 3
c) Swith Stage 2 to TCrappy (Using Switch All)
d) Swith Stage 1 to TCrappy (Using Switch All)
We are working on the Guardian to simplify all of this. It will handle all the parameters and sequences specific to each chamber (controls level, blend filters, alignement dofs to be restored...)
If you have been struggling with switching the blend filters, you may want to zero the T240s. You can do this in the three T240 screens by tuning on the AutoZ filter module in the X filter module, then turning it off.
It is my understanding that you should NOT zero the T240, certainly not just to try it. In a new installatioin or the T240 is suspected of being out of level, then one should look at the U V W signals and AutoZ if they are not close to zero once the machine has stabilized. Before I was told this, it was my experience that pressing the AutoZ did NOT speed up the Trillium settleing process. Rich Mittleman--please weigh in here.
Thank you for clarifying...
Fabrice asks that we also add a step at the begining of the procedure where we plot the WD trip, zoom in and post it in the alog. Hopefully this we result in seismic people analyzing them and figuring out why we have so many trips.
This is important because our current rate of trips (and the time it takes to recover from them) will be a serious impediment to commsioning once we need to use 7 chambers all at the same time.