Rich A., Lisa, Sheila, Jeff, Evan
The EY ESD driver has tripped twice today, apparently in the same failure mode as described previously. Each time we have had to drive down to the end station to reactivate it.
The supplies are set at ±430 V, each with a 75 mA current limit. When the driver is active, it draws 23 mA dc from the positive supply and 20 mA dc from the negative supply. When tripped, it draws 3 mA dc from each supply.
This seems to happen every time we loose lock if we have transitioned to ETMY. We are getting plenty of excerise tonight going back and forth to the end station.
If anyone has any ideas about how to make this easier to reset or to prevent it from happening, that would save us some fuel.
Why don't we set a digital limiter ? For example, see LLO alog:
https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=14472