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Reports until 15:05, Friday 30 January 2015
H1 AOS
krishna.venkateswara@LIGO.ORG - posted 15:05, Friday 30 January 2015 (16380)
H1 EX: BRS resuscitated

K. Venkateswara

BRS was turned off just before the vent at EX (15711). I restarted the code in the BRS laptop and noticed that the DC position of the balance had changed owing to the 2 deg C temperature change in the XVEA. The balance is just out of the nominal range but still working correctly, as far as I can tell. If it proves to be noisier, I may adjust the set point in hardware on Tuesday, since it will take a couple of hours to get right. For now, I adjusted the DC offset in the code appropriately and it all seems to be working as usual (see image). The wind-speed is barely a few mph.

The sensor correction is now using the tilt-subtracted ground super-sensor. This should make no difference to the platform, at the moment, as the sensor correction is using the "0.43-Hz only" filter.

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