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installation_fp_sci [2017/06/13 12:19] pereira |
installation_fp_sci [2017/06/20 10:44] pereira [Vent focal-plane chamber] |
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* Ensure that the manual venting valve located on the south side of the chamber is closed (see figures below) | * Ensure that the manual venting valve located on the south side of the chamber is closed (see figures below) | ||
* Ensure that the FP ion gauge (I264IG) is off (see details [[vacuum_control|here]]) | * 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** window and begin the venting procedure. The **VENT VALVE I260VV** window will turn red and display " | + | * Open PanelMate and select **S800vac** file in directory \\exp\files\control\ncsdata\General\Qt\Templates. Go to page 07, and ensure that I265GV (gate valve separating FP box from rest of beam line) is closed. |
+ | * Click on the **VENT STATUS** window and begin the venting procedure. The **VENT VALVE I260VV** window will turn red and display " | ||
* Gently open the manual venting valve until the pressure displayed in the Pirani Gauge (see figure below) increases by ~1 torr every 15 seconds (see figures below) | * Gently open the manual venting valve until the pressure displayed in the Pirani Gauge (see figure below) increases by ~1 torr every 15 seconds (see figures below) | ||
{{: | {{: | ||
* Wait until the chamber is vented (few hours). The **I261PG** Pirani Gauge should read slightly above atmospheric pressure (due to the dry N2 flow pumped to the chamber). The window **VENT STATUS** in PanelMate should display "VENT VALVE OPEN". The window **PUMPDOWN STATUS** should display " | * Wait until the chamber is vented (few hours). The **I261PG** Pirani Gauge should read slightly above atmospheric pressure (due to the dry N2 flow pumped to the chamber). The window **VENT STATUS** in PanelMate should display "VENT VALVE OPEN". The window **PUMPDOWN STATUS** should display " | ||
+ | * When the chamber is fully vented, close the manual vent valve | ||
===== Open focal-plane chamber ===== | ===== Open focal-plane chamber ===== | ||
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===== Pumping focal-plane chamber ===== | ===== Pumping focal-plane chamber ===== | ||
- | * Make sure that the pressure-relief valve (see above) | + | * Make sure that the pressure-relief |
- | * In order to pumpdown the chamber, | + | * In order to pumpdown the chamber, |
* Close the manual pump; open PanelMate **S800vac** and go to page 07. Select window **PUMPDOWN STATUS** and click on button **START PUMPDOWN**. The **PUMPDOWN STATUS** and **VENT STATUS** windows should display " | * Close the manual pump; open PanelMate **S800vac** and go to page 07. Select window **PUMPDOWN STATUS** and click on button **START PUMPDOWN**. The **PUMPDOWN STATUS** and **VENT STATUS** windows should display " | ||
* Wait for some hours until vacuum is good | * Wait for some hours until vacuum is good |