Warning/Reminder! Bell Jar Problem!

Mary Tang mtang at stanford.edu
Tue Sep 18 17:19:38 PDT 2007

Hello Innotec users --

Correction from Jeannie and Jim.  DO NOT "HELP" THE BELL JAR.  Please 
use just the two buttons to move the bell jar.  This is a safety concern 
(moving parts and nearby fingers you know.)



Mary Tang wrote:
> Hi Innotec users --
> As per Jeannie and Jim Haydon: "Please check back of bell jar when 
> down before starting the roughing pump. I am having to press down on 
> the back of the
> bell jar to help the bell jar lay flat in the back."
> In addition, make sure to follow the operating procedures when you 
> pump down the system. For your reference, here's the pumpdown procedure:
> 1. Press the Vent key to stop venting (F6).
> 2. Press Pump Only to start pumping (F5). WAIT, YOU”RE NOT FINISHED YET!
> 3. Monitor the pump down to be sure the chamber was correctly positioned:
> a. Verify that the amber ATM light goes out with in 10 sec.
> b. Watch for the pressure to drop to the crossover point, i.e. for the 
> cryopump to take over at about 150 millitorr. This will take 5 minutes.
> If you do not follow these instructions, realize that the pump may 
> become severely damaged!
> If the light does not turn on or the pressure does not drop to the 
> cross over point in about 6 minutes, do the following:
> 1. Open up the chamber and check the seal. Try pump down again.
> 2. If it fails pumpdown, then STOP the pump (this will prevent it from 
> burning out), shutdown the innotec on Coral, and notify Staff of the 
> problem.
> Please do note these and any other problems on Coral -- more 
> information will help staff members troubleshoot these problems.
> Thanks!
> Mary

Mary X. Tang, Ph.D.
Stanford Nanofabrication Facility
CIS Room 136, Mail Code 4070
Stanford, CA  94305
mtang at stanford.edu

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