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venting_pumping_intermediate_image_box

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venting_pumping_intermediate_image_box [2017/06/12 14:52]
pereira [Vent focal-plane chamber] 		venting_pumping_intermediate_image_box [2017/06/12 14:55]
pereira
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-===== Venting/pumping Intermediate Image box and filling PPACs with gas =====+====== Venting/pumping Intermediate Image box and filling PPACs with gas ======
 The procedures to vent/pump the S800 Intermediate Image box, and/or filling the PPAC detectors with gas must be done carefully to ensure that the PPACs are not damaged. For instance, before venting the chamber, we have to make sure that the PPACs are empty and equalized with respect to the vacuum in the chamber. In order to avoid errors, an automated gas handling system (II-GHS) was designed to perform these tasks safety. The system is schematically illustrated in the figure below. It shows the status of the valves (red: closed, white: open) when the intermediate image chamber is under vacuum and the PPACs are filled with gas: The procedures to vent/pump the S800 Intermediate Image box, and/or filling the PPAC detectors with gas must be done carefully to ensure that the PPACs are not damaged. For instance, before venting the chamber, we have to make sure that the PPACs are empty and equalized with respect to the vacuum in the chamber. In order to avoid errors, an automated gas handling system (II-GHS) was designed to perform these tasks safety. The system is schematically illustrated in the figure below. It shows the status of the valves (red: closed, white: open) when the intermediate image chamber is under vacuum and the PPACs are filled with gas:
  
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 {{:wiki:IIGHShardware.jpg?600|Gas Handling System of S800 Intermediate Image}}  {{:wiki:IIGHShardware.jpg?600|Gas Handling System of S800 Intermediate Image}} 
-==== Vent focal-plane chamber ====+ 
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 +===== Vent focal-plane chamber =====
 Requirements: PanelMate files **S3_Gas_Handling** and **S800Vac** Requirements: PanelMate files **S3_Gas_Handling** and **S800Vac**
  
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         * 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?350|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?350|S800vac Panel Mate: start venting}}. 
-        * When pressure in **I215PG** reaches atmospheric pressure, stop the venting process by selecting the box "VENT STATUS" and clicking "STOP VENTING PROCESS" {{:wiki:iis800vac_stopventing.jpg?350|S800vac Panel Mate: stop venting}}. +        * When **I215PG** reads atmospheric pressure, select the box "VENT STATUS" and click "STOP VENTING PROCESS". {{:wiki:iis800vac_stopventing.jpg?350|S800vac Panel Mate: stop venting}}. 
  
         * The status in the box "VENT STATUS" should change from "WAITING FOR VENT TIMER" to "VENT PROCEDURE STOPPED"         * The status in the box "VENT STATUS" should change from "WAITING FOR VENT TIMER" to "VENT PROCEDURE STOPPED"
         * You can now open the chamber         * You can now open the chamber
  
venting_pumping_intermediate_image_box.txt · Last modified: 2024/01/12 09:37 by noji

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