40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Tue Jun 29 08:41:06 2010, steve, Update, MOPA, MOPA is dead laserisdead.jpg
    Reply  Tue Jun 29 10:20:58 2010, rana, Update, MOPA, MOPA is NOT dead 
       Reply  Tue Jun 29 16:44:12 2010, Jenne, rana, Update, MOPA, MOPA is NOT dead, was just asleep 
Message ID: 3137     Entry time: Tue Jun 29 16:44:12 2010     In reply to: 3132
Author: Jenne, rana 
Type: Update 
Category: MOPA 
Subject: MOPA is NOT dead, was just asleep 


Not dead. It just had a HT fault. You can tell by reading the front panel. Cycling the power usually fixes this.

MOPA is back onliine.  Rana found that the fuse in the AC power connector's fuse had blown.  This was evident by smelling all of the inputs and outputs of the MOPA controller. The power cord we were using for this was only rated for 10A and therefore was a safety hazard. The fuse should be rated to blow before the power cord catches on fire. The power cord end was slightly melted. I don't know why it hadn't failed in the last 12 years, but I guess the MOPA was drawing a lot of extra current for the DTEC or something due to the high temperature of the head.

We got some new fuses from Todd @ Downs. 

The ones we got however were fast-blow, and that's what we want  The fuses are 10A, 250V.  The fuses are ~.08 inches long, 0.2 inches in diameter. 

ELOG V3.1.3-