Differences

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

--- venting_pumping_object_box [2023/05/30 14:31]
swartzj
+++ venting_pumping_object_box [2023/06/01 13:43]
swartzj
@@ Line 6: / Line 6: @@
   * Before you start, make sure that the gate valves named D2341 BGV and D2303 BGV are closed and that the IG is off.
   * The vent valve should also be closed when you begin.
-  * Both valves to the turbo pump should be closed and the turbo pump should be switched off.
+  * The valve to the turbo pump TVG should be closed. If the chamber will be vented for a long time, Valve FV should also be closed and the turbo pump should be switched off .
 The procedure is then as follows:
   - Close the valve to the roughing pump RV.
   - Now you can plot the pressure at BPG to monitor the pressure before you open the vent valve.
-  - **Keep a constant eye on the pressure level** as it increases rapidly. Before it nears 800 torr, **it is imperative that you close the venting valve.** Failure to do this will result in over pressure since the chamber will continue to be filled with dry nitrogen.
+  - **Keep a constant eye on the pressure level** as it increases rapidly. When it approaches 800 torr, **it is imperative that you close the venting valve.** Failure to do so will result in over-pressure in the chamber since it will continue to be filled with dry nitrogen.
   - You can now enter and open the chamber.

S800 Documentation