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Entry  Sun Jul 23 15:00:28 2017, Jamie, Omnistructure, VAC, strange sound around X arm vacuum pumps 
    Reply  Mon Jul 24 09:55:29 2017, Steve, Omnistructure, VAC, controller failer TP2controllerFails.png
       Reply  Tue Jul 25 08:48:57 2017, Steve, Update, VAC, RGA scan at d278 RGA278d.png
          Reply  Mon Aug 28 10:28:07 2017, Steve, Update, VAC, RGA scan 20 day after 17 Torr 20d_after_17_torr.png
             Reply  Tue Jan 30 10:22:20 2018, Steve, Update, VAC, RGA scan at day 175 RGApd80-b-468-175d.pngRgaOn20hrs.png
                Reply  Fri Mar 16 09:36:56 2018, Steve, Update, VAC, RGA scan at day 511,218d RgaScan511d.png08.png
                   Reply  Mon Mar 26 09:25:18 2018, Steve, Update, VAC, VM1 opened CC4VM1.png
                      Reply  Tue Mar 27 08:58:21 2018, Steve, Update, VAC, VM1 opened.......scan fine rga2018march27.png
          Reply  Tue Sep 19 11:05:26 2017, Steve, Update, VAC, RGA scan at day 334  RGAscan334d.png
             Reply  Fri Oct 27 10:14:11 2017, Steve, Update, VAC, RGA scan at day 372 RGA_scan_d372.png
                Reply  Mon Oct 30 10:09:41 2017, Steve, Update, VAC, TP2 failed tp2failed.pngifo_1.0E-5_Torrit.pngtp2failed2dago.png4days.png
                   Reply  Mon Nov 6 09:09:43 2017, Steve, Update, VAC, setting up new TP2 turbo 
       Reply  Tue Jul 25 14:04:06 2017, Steve, Update, VAC, turbo controller installed and we are running at vac normal TP2@75Krpm.png
Message ID: 13409     Entry time: Mon Nov 6 09:09:43 2017     In reply to: 13407
Author: Steve 
Type: Update 
Category: VAC 
Subject: setting up new TP2 turbo 

Our new Agilent Technology TwisTorr 84FS AG rack controller ( English Manual pages 195-297 )  RS232/485, product number X3508-64001, sn IT1737C383

This controller, turbo and it's drypump needs to be set up into our existing vacuum system. The intake valve of this turbo (V4) has to have a hardwired interlock that closes V4 when rotation speed is less than 20% of preset RPM speed.

The unit has an analoge 10Vdc output that is proportional to rotation speed. This can be used with a comperator to direct the interlock or there may be set software option in the controller to close the valve if the turbo slows down more than 20%

The last Upgrade of the 40m Vacuum System  1/2/2000 discribes our  vauum system  LIGO-T000054-00-R 

Here the LabView / Metrabus controls were replaced by VME processor and  an Epic interface

We do not have schematics of the hardware wiring.

We need help with this.


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