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Entry  Fri Jul 17 11:29:57 2015, Alessandra, Misc, Seismometer, QPD calibration Calibrazione_QPD.JPG
    Reply  Fri Jul 17 11:51:46 2015, Koji, Misc, Seismometer, QPD calibration 
Message ID: 1982     Entry time: Fri Jul 17 11:51:46 2015     In reply to: 1981
Author: Koji 
Type: Misc 
Category: Seismometer 
Subject: QPD calibration 

- The power supply was TEMMA triple power supply with dual 30V supplies and a fixed 5V supply. This was a long loan from ATF to the OMC lab.

- The 4ch color oscilloscope is a loan from the OMC lab to ATF. ATF seemed to have only one oscillocscope that is what Arjun is using.

- During the calibration, the suspension was stopped by the stoppers. Also we added a mass at the bottom so that the suspension is further stabilized by the increased pressue to the stoppers.

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