The BRS at EY has had a long term drift requiring periodic recentering. That drift seems to have stopped or changed sign, following the power outage on Saturday. Attached image is a 60 day trend for H1:ISI-GND_BRS_ETMY_DRIFTMON. The black streaks are from when the BRS went out of range and when it was recentered during Krishna's last visit. The little blip up to zero at the end is from the power outage, before the commissioners recovered the BRS code. Second image is the last 6 days, outage is when the signal goes to zero. Definitely looks like the drift has changed sign.
I checked the temperature ('H1:ISI-GND_BRS_ETMY_TEMPR') and it looks a bit lower than normal, so it doesn't account for the change in the drift. It may be good to go to EndY and check on the Ion pump controller and make sure that it is ON? If it didn't get turned on after the power outage, a rising pressure might be the cause for the change in drift. The Ion pump controller should have a High Voltage indicator which should be on and clicking the OK button should give you the pump current and pressure reading.
The ion pump was off. It took a couple tries to get it to come back on. Voltage was around 5200V and 9-12 mA when I left the end station, pressure was already back to ~1E-5 torr. The power supply is kind of hidden under some other stuff, under the beam tube. Gerardo tells me that the power supplies at each end station are different, the one at EX comes back on it's own, EY doesn't. I'll see about adding a note to the start up procedure in T1600103.
IP power supply status should be added to vacuum GUI in CDS so we can catch power failures right away.