aLIGO LHO Logbook

H1 TCS

filiberto.clara@LIGO.ORG - posted 11:59, Tuesday 10 January 2017 - last comment - 13:42, Thursday 12 January 2017(33129)

TCSY CO2 Laser Interlock Chassis Replaced

WP 6428

This morning the CO2 Laser Interlock Chassis D1200745 was replaced. This work is part of the ongoing investigation of the TCS flow sensor alarms/glitches. See alog 32776. Verified trip point for the temperature shutoff of the laser on new chassis. Steps taken to replace chassis:

1. Turn off laser at key
2. Turn off chiller in mechanical room
3. Turn off chassis and unplug all connections
4. Install new chassis, rocker switch set to CW (OPS) position
5. Redo connections to chassis & power on
6. Turn on chiller
7. Check there are no red lights on chassis front panel
8. Key on laser and press gate button
9. Check laser power actually powers on (MEDM screen).

Old Chassis S1302125
New Chassis S1302122

Fil, Richard, Nutsinee, Alastair

Comments related to this report

nutsinee.kijbunchoo@LIGO.ORG - 13:07, Thursday 12 January 2017 (33179)TCS

Link

This swap unfortunately didn't seem to fix the problem. TCSY flowrate continues to glitch.

Images attached to this comment

alastair.heptonstall@LIGO.ORG - 13:42, Thursday 12 January 2017 (33181)

Link

Okay, no problem. That hopefully means it's unlikely this will cause the lasers to shutoff (ie more likely a data acquisition fault). We should look at Beckhoff next I think.