K. Venkateswara

Due to the preparation for the vent at EX, the clean-room fans and lights are on which have increased the temperature in the VEA by ~1.5 deg C. Also, the cranes and sundry equipment has been moved around which has also changed the gravity gradients around BRS. Both of these changes have signficiantly changed the DC position of the beam-balance and it is almost out of range as seen in the attached graph. The Driftmon signal can be interpreted as the DC position of BRS.

I've temporarily turned the system OFF for the vent. Jim or I will turn it back on once conditions return to normal at EX.