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  Fri Jul 30 09:55:34 2010, steve, Configuration, VAC, slow pumpdown has started slowpd5hr.jpg
    Reply  Fri Jul 30 17:54:55 2010, steve, HowTo, VAC, How to stop and start slow pumpdown 
       Reply  Fri Jul 30 22:07:42 2010, Koji, HowTo, VAC, How to stop and start slow pumpdown 
          Reply  Sat Jul 31 10:12:05 2010, kiwamu, Update, VAC, Re: How to stop and start slow pumpdown 
             Reply  Sat Jul 31 14:59:33 2010, kiwamu, Update, VAC, Re: How to stop and start slow pumpdown 
    Reply  Mon Aug 2 10:26:15 2010, steve, Configuration, VAC, very slow pumpdown completed veryslowpd.jpg
Message ID: 3338     Entry time: Fri Jul 30 22:07:42 2010     In reply to: 3336     Reply to this: 3340
Author: Koji 
Type: HowTo 
Category: VAC 
Subject: How to stop and start slow pumpdown 

Kiwamu and Koji

The rough pumping was stopped at 230mmTorr. We are going to resume the pumping tomorrow morning.

  • RV1 was closed with torque wheel.
  • V3 was closed from MEDM
  • RP3 wss stopped from MEDM
  • The quick coupling to RP3 was disconnected.

Quote:

    How to stop: 1, close RV1 by torque wheel  2, close V3 from MEDM screen  3, turn off RP3 roughing from MEDM screen  4, disconnect metal hose to oily pump

after butterfly valve. This KF-45 O-ring seal should be kept clean 5, place/close  45 mm cover blanks at the end of the hose and and on the 5" nipple. 

    How to start: 1, remove blanks from  hose and nipple 2, reconnect roughing pump hose to RV1 nipple  3, turn on PR3  4, open V3  5, open RV1 by wrench to ~3/8

6, fine tune RV1 opening to 1 Torr/min

ESSENTIAL: one operator has to be present when oilly roughing pump is connected to the vac. envelope

ELOG V3.1.3-