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Environmental Monitoring (Environmental Monitoring)
fiori, garufi, cavalieri, tringali - 11:08 Wednesday 18 June 2025 (67023) Print this report
intervention on EER Nexus and EER microphone

Following an indication by Bernardo (EIB and LB microphones and accelerometers "low response" since June 16th) we inspected EERoom and found the Nexus module that powers those sensors in off state. We ridentified the faulty piece being the AC/DC converter of the module. It is not the first time that this happens by the way. This componet was replaced and the Nexus and sensors put back in operation within the maintenance time. Figure 1.

During the operation we accidentally unplugged the CLIO-Pre01 module powering the EERoom's microphone (channel ENV_EER_MIC). Once replugged the microphone worked for about one hour and then went off. Surprisingly the microphone restarted working this morning at 5:00 UTC (7:00 LT).  We are not aware of any dedicated action. One suspect is some loose contact. To be checked at next maintenance. Figures 2 and 3.

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Comments to this report:
garufi - 12:14 Wednesday 18 June 2025 (67031) Print this report
Profiting of a temporary ITF down, I unplugged and re-plugged the power supply from the PRE-01 module of EE-Room to be sure of the proper contacts. The result is that EE_MIC is again dead, apparently, athough the module seems to be properly powered. If a spare is available, I would try to replace the module itself, at the next occasion.
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