aLIGO LHO Logbook

H1 AOS

daniel.vander-hyde@LIGO.ORG - posted 19:39, Sunday 19 August 2018 - last comment - 10:24, Monday 20 August 2018(43520)

HAM6 OMC TRANS cam not displaying image

Danny, Stefan, Hang

Went out to with Stefan realign the HAM6 OMC TRANS camera to better image the beam on the CCD. After Stefan left, Hang and I tried finishing up the job but the camera became unresponsive to medm. The camera started to run hot after a while so we believe the camera is suspect here and not the connection. To test this we carefully used the ISCT SHG TRANS connection to see if we could get any response from the HAM6 OMC TRANS cam. It still did not work. I reinstalled the camera back in its original place but I did not plug it back in (to avoid overheating).

Comments related to this report

stefan.ballmer@LIGO.ORG - 10:24, Monday 20 August 2018 (43530)

Link

- These cameras get pretty warm, so that part is normal.
- Video did no longer come up because the camera server on h1digivideo1 died. To restart:
   - ssh on to controls@h1digivideo1 (h1digivideo0 : CAM 01-10; h1digivideo1 : CAM 11-20; h1digivideo2 : CAM 21-30; etc)
   - the control commands can be found here: more /etc/monit/conf.d/h1digivideo1-cams 
   - in particular, to start CAM15: /etc/init.d/h1cam15 start
- The rest was some painful aligning of the hard-to-access camera inside the view port cover (with the lexan-shield in place).

Bottom line: the OMC_TRANS camera is operational again.