Virgo Logbook

this morning I came on the site for the problem of temperature and humidity in det lab, which arose yesterday; I think it is useful to briefly summarize from the beginning: around 6 pm yesterday afternoon, Friday, during a remote general check from my office PC before leaving, I realized that the Kiebach & Peter controller for DET Lab was blocked and it was not possible to perform any operation; I then physically went to the regulator and proceeded, after informing the Operator on duty (A.Magazzu '), to restart the device. After this operation, the steam generator went into lockdown and the relative humidity in the laboratory decreased significantly. At 19.34 the Operator tried to contact me but the phone probably had no signal and I only realized it at 23.30 once I saw the SMS notifying the call attempt. I connected remotely to understand the reason for the call and I noticed that the relative humidity and temperature values were low. To try to mitigate the temperature, I raised the saturation temperature from 13 to 16 degrees at 23.50 (LT). This morning around 7 am I found the steam producer blocked due to a "blocked exhaust valve": I tried to intervene on this but I fear that it will need new since all my actions, for now, do not seem to have given positive effects. I called our maintenance company who assured me that, if possible, they will also intervene today. Unfortunately for the moment the relative humidity level of the DET laboratory remains low (around 30%).

I will monitor the situation from home and in case of updates it will be my responsibility to notify them.