This shows you the differences between two versions of the page.
Next revision | Previous revision Next revision Both sides next revision | ||
venting_pumping_intermediate_image_box [2017/06/12 12:28] pereira created |
venting_pumping_intermediate_image_box [2017/06/13 11:43] pereira |
||
---|---|---|---|
Line 1: | Line 1: | ||
- | ===== Venting/ | + | ====== Venting/ |
+ | 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: | ||
- | ==== Vent focal-plane chamber ==== | + | {{: |
- | * Open the [[hv_bias|HV Remote Control]] GUI and ensure | + | |
- | * Open the [[gas_handling_system# | + | The II-GHS equipment (valves, flow-meter, pipes, etc.) are located on the west balcony of the top level in the S3 vault (see figure below): |
- | * Ensure that the manual venting valve located on the south side of the chamber is closed | + | |
- | * Ensure that the FP ion gauge (I264IG) is off (see details [[vacuum_control|here]]) | + | {{: |
- | * Open PanelMate and select **S800vac** file in directory \\exp\files\control\ncsdata\General\Qt\Templates. Go to page 07, click on the **VENT STATUS** | + | |
- | * Gently open the manual venting valve until the pressure | + | |
- | {{:wiki:fp-pirani.jpg?350|FP chamber manual | + | |
- | * Wait until the chamber is vented (few hours). The **I261PG** Pirani Gauge should read slightly above atmospheric pressure | + | |
+ | |||
+ | |||
+ | |||
+ | ===== Vent focal-plane chamber | ||
+ | Requirements: | ||
+ | |||
+ | * Verify | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | * Open **S800Vac** and go to page 03 (" | ||
+ | * Check box " | ||
+ | {{:wiki:iis800vac_pumped.jpg?500|S800vac Panel Mate}}. | ||
+ | * In order to begin venting process, select that box and click "BEGIN VENTING PROCEDURE" | ||
+ | | ||
+ | | ||
+ | * When **I215PG** reads atmospheric pressure, select | ||
+ | |||
+ | | ||
+ | * You can now open the chamber | ||