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Reports until 16:20, Tuesday 24 January 2017
H1 OpsInfo
jim.warner@LIGO.ORG - posted 16:20, Tuesday 24 January 2017 (33602)
Changes to ISC_LOCK today for BRSX

With Jenne and Krishna's approval, I added a couple of steps to ISC_LOCK to reduce the chance that BRSX will engage damping while we are locked. In the DOWN state I added an ezca call on line 218 to set the BRS damping upper limit to a level lower than we usually run:

        ezca['ISI-GND_BRS_ETMX_HIGHTHRESHOLD'] = 1000

On line 1098 (TURN_ON_BS_STAGE2) I reset this value to the normal run value:

        ezca['ISI-GND_BRS_ETMX_HIGHTHRESHOLD'] = 2000

If either of these states cause a problem relocking, the on shift operator should just comment both of these lines out. Then check on the BRSX overview that the damp threshold value has been set to 2000. If it's still at 1000, you can use a caput in terminal or right click --> probe --> adjust to set it to 2000.

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