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Reports until 11:57, Tuesday 28 October 2025
LHO VE
janos.csizmazia@LIGO.ORG - posted 11:57, Tuesday 28 October 2025 (87795)
Quarterly Functionality Test Performed on EX/MX Turbo Pumps and EX Purge Air Skid
Procedure checklist for both stations completed.  No issues were identified at this time.

MX: Scroll pump hours: 236.9
       Turbo pump hours: 149
       Crash bearings: 100%

EX: Scroll pump hours: 7157.3
       Turbo pump hours: 1109
       Crash bearings: 100%

EX purge air compressor was ran for ~3 hours, dew point monitor reached <-40 deg F in ~15 minutes and at time of shut down was reporting -76 degF.

Compressor has 74 running hours total, distributed between the three scroll compressors. Drains are operational, dryers indicate normal operation. The only caveat here is that compared to the EY compressor, the main drain (after the compressor) discharged a lot more water. This indicates a higher humidity in the EX MER.

Images attached to this report
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