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--- venting_pumping_lower-dipole_section_venting_pumping_lower-dipole_section [2017/06/22 12:03]
pereira [Venting analysis-line lower-dipole section]
+++ venting_pumping_lower-dipole_section_venting_pumping_lower-dipole_section [2020/04/01 21:34]
pereira
@@ Line 5: / Line 5: @@
   * Verify that the target area is vented.
-  * Using the EMIS controllers in the middle level of the S3 vault (see figure above), ensure that the ion gauge I225IG is turned off.
+  * Using the manual controllers in the middle level of the S3 vault (see figure above), ensure that the ion gauge I225IG is turned off. Open **S800vac** PanelMate.
-  * Ensure that gate valves I246GV (between lower-dipole section and target area) and I215GV (between intermediate image area and the lower-dipole section) are closed.
-  * Open **S800vac** PanelMate.
   * Go to page 4 ("lower beamline dipoles vacuum system, section 16")
+  * Ensure that gate valves I246GV (between lower-dipole section and target area) and I215GV (between intermediate image area and the lower-dipole section) are closed.
   * Window "VENT STATUS" should be green and display "GOOD VACUUM"
-  * Click on "VENT STATUS" and select "BEGIN VENTING PROCEDURE". The I225GV turbo gate valve will be automatically closed (see figure below). However, the venting process won't be complete until you open the manual valve.
+  * Walk to the bottom level of the S3 vault, right downstream of the last two dipoles of the analysis line and verify that the manual vent valve is closed (see picture below).
-  * Walk to the bottom level of the S3 vault, right downstream of the last two dipoles of the analysis line. Locate the I226PG Pirani gauge and ensure that it reads rough-vacuum pressure (few miliTorr).
+  * In PanelMate **S800vac** (page 4), click on "VENT STATUS" and select "BEGIN VENTING PROCEDURE". The I225GV turbo gate valve will be automatically closed (see figure below), and the automatic vent valve open. However, the venting process won't be complete until you open the manual valve.
+  * Walk (again) to the bottom level of the S3 vault, right downstream of the last two dipoles of the analysis line. Locate the I226PG Pirani gauge and ensure that it reads few miliTorr.
   * Slowly open the manual valve (see picture below) and verify that the pressure read in I226PG raises slowly.
   * After the section is vented (atmospheric pressure) close the manual gate valve.

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