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  Thu Dec 12 17:22:07 2013, Steve, Update, General, rack power supplies checked 8x
    Reply  Fri Dec 13 16:34:20 2013, Steve, Update, VAC, PS will be replaced next week hotPSvacRack.jpgfan1X8.jpg
       Reply  Fri Dec 20 20:04:01 2013, Steve, Update, VAC, power supply replaced with a short vent 4hrPumpdown.pngpumpdownAfterHickup.pngPSpumpdown.png
          Reply  Fri Dec 20 23:00:41 2013, Koji, Update, VAC, power supply replaced with a short vent 
             Reply  Sat Dec 21 10:53:35 2013, Steve, Update, VAC, power supply replaced with a short vent-pumpdown completed 20hrsVacNormal.png
          Reply  Fri Jan 3 11:18:41 2014, Steve, Summary, VAC, power supply replaced with a short vent rebootVENT.png
    Reply  Thu Feb 22 10:49:11 2018, Steve, Update, Electronics, rack power supplies checked 8x
Message ID: 9467     Entry time: Fri Dec 13 16:34:20 2013     In reply to: 9458     Reply to this: 9506
Author: Steve 
Type: Update 
Category: VAC 
Subject: PS will be replaced next week 

Quote:

Instrument rack power supplies checked and labeled at present loads.

The vacuum rack Sorensen is running HOT! Their is only 0.3A load at 24V There is plenty of space around it.

It is alarming to me because all vacuum valve positions are controlled by this 24V

 The temperature went down to room temp with temporary fan in the back. Voltage and current are stable.

Regardless, it will be replaced early next week.

Attachment 1: hotPSvacRack.jpg  182 kB  | Show | Hide all | Show all
Attachment 2: fan1X8.jpg  203 kB  | Hide | Hide all | Show all
fan1X8.jpg
ELOG V3.1.3-