Differences

This shows you the differences between two versions of the page.

--- venting_pumping_object_box [2023/06/02 17:14]
swartzj
+++ venting_pumping_object_box [2023/11/17 11:23]
swartzj
@@ Line 18: / Line 18: @@
 From S800 Vacuum Main Page, go to Object chamber page. This will open the page in the figure below.
   * Make sure that the IG is off.
-  * When you start, you should have RV closed, FV open and the TGV valve, Vent valve, as well as the gate valves named D2341 BGV and D2303 BGV all closed.
+  * When you start, you should have RV closed, FV closed and the TGV valve, Vent valve, as well as the gate valves named D2341 BGV and D2303 BGV all closed.
-  * Close FV and open RV to start pumping down the object chamber with the roughing pump. You can make a plot of the pressure vs time at BPG at this point.
+  * Open RV to start pumping down the object chamber with the roughing pump. You can make a plot of the pressure vs time at BPG at this point.
   * Section D2337 will initially be red with vacuum status: 'Bad vacuum'. This must turn to yellow with status 'Poor vacuum'. Wait for the pressure reading at BPG to drop to below 100 mTorr before you close RV and open FV.
   * Wait until the vacuum reading at FPG to drops to below 200 mTorr before you can safely turn on the turbo pump.

S800 Documentation