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venting_pumping_intermediate_image_box

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venting_pumping_intermediate_image_box [2018/04/16 16:13]
pereira 		venting_pumping_intermediate_image_box [2018/04/25 17:03]
pereira [Pumping Intermediate-image chamber]
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   * Check box "PUMPDOWN STATUS INTERMEDIATE IMAGE BOX". It should read "Good vacuum"    * Check box "PUMPDOWN STATUS INTERMEDIATE IMAGE BOX". It should read "Good vacuum" 
 {{:wiki:iis800vac_pumped.jpg?500|S800vac Panel Mate}}.  {{:wiki:iis800vac_pumped.jpg?500|S800vac Panel Mate}}. 
-  * In order to begin venting process, select that box and click "BEGIN VENTING PROCEDURE"+  * In order to begin venting process, select box "VENT STATUS" and click "BEGIN VENTING PROCEDURE"
         * Box "VENT STATUS" should change from "VENT PROCEDURE STOPPED" to "WAITING FOR VENT TIMER".          * Box "VENT STATUS" should change from "VENT PROCEDURE STOPPED" to "WAITING FOR VENT TIMER". 
         * Turbo gate valve **I214GV** will be automatically closed and pressure in chamber will start rising (as seen in **I215PG**) {{:wiki:iis800vac_startventing.jpg?500|S800vac Panel Mate: start venting}}.          * Turbo gate valve **I214GV** will be automatically closed and pressure in chamber will start rising (as seen in **I215PG**) {{:wiki:iis800vac_startventing.jpg?500|S800vac Panel Mate: start venting}}. 
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   * Verify that Chamber is closed and pressure-relief valve (north side of the chamber) is properly closed (NOTE: sometimes, due to overpressure from dry N2 during the venting procedure, the O-ring in pressure-relief valve flange is moved out of place)   * Verify that Chamber is closed and pressure-relief valve (north side of the chamber) is properly closed (NOTE: sometimes, due to overpressure from dry N2 during the venting procedure, the O-ring in pressure-relief valve flange is moved out of place)
   * Verify that PPACs are not biased by opening the [[HV bias|HV GUI]]   * Verify that PPACs are not biased by opening the [[HV bias|HV GUI]]
-  * IMPORTANT: Close manual roughing pump valve located near the intermediate-image chamber {{:wiki:manualvalverough.jpg?350|Manual valve rough pump}}. +  * IMPORTANT: Verify that manual roughing pump valve located near the intermediate-image chamber is closed{{:wiki:manualvalverough.jpg?350|Manual valve rough pump}}. 
  
   * Insert PPACs/turn on light (Diagnostic Drives PanelMate) and verify condition through sight window on south side of the chamber (be careful no to bump the bullet camera).   * Insert PPACs/turn on light (Diagnostic Drives PanelMate) and verify condition through sight window on south side of the chamber (be careful no to bump the bullet camera).
venting_pumping_intermediate_image_box.txt ยท Last modified: 2024/01/12 09:37 by noji

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