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[Steve Koji]
We pushed the reset button of c1vac1 and c1vac2 and the vacuum screen is back.
First, we pushed the reset button of c1vac1 and pushed the one on c1vac2.
This did not bring c1vac2 up. We pushed the reset of c1vac2 again and now everything of the vacuum screen is back.
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1, Reset works
2, Default values are lost. They actually reversed into open and turn on everything when power recycle c1vac1, c1vac2 or 24V dc power supply. This can vent the IFO in an event of power failure!
It's may be the time to go back to an isolated, vacuum controller only computer.
The present valve configuration at Atm1
a, all annuloses are vented
b, valve cables disconnected at: VC1 and 4 IP gate valves
c, the RGA is off and it is pumped by the Maglev through VM2
d, cryo pump is being roughed with TP3 It's outgassing rate was 25 mTorr / min
e, Roughing hose is disconnected |