installation_fp_sci
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installation_fp_sci [2017/06/20 10:43] pereira [Pumping focal-plane chamber] |
installation_fp_sci [2017/06/20 17:14] pereira [Closing focal-plane chamber] |
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| * 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, select **VENT STATUS** and click **STOP VENTING PROCEDURE** | ||
| + | * Close the manual vent valve | ||
| ===== Open focal-plane chamber ===== | ===== Open focal-plane chamber ===== | ||
| Line 36: | Line 38: | ||
| ===== Closing focal-plane chamber ===== | ===== Closing focal-plane chamber ===== | ||
| * Turn the switch to move the chamber to position " | * Turn the switch to move the chamber to position " | ||
| - | * When the chamber is almost | + | * Check the display indicating the weight lift by the hydraulic system. |
| + | * Turn the knob to close the clamps | ||
| + | * Inspect the clamps and chamber flange (no gaps) to ensure that the chamber is properly sealed | ||
| * Before pumping the chamber down, make sure that the scintillator is properly connected. This can be done by biasing the detector and checking the signals, either from the scalers or with a scope. One should clearly see cosmic rays; if that is not the case, the phototubes are likely miss connected | * Before pumping the chamber down, make sure that the scintillator is properly connected. This can be done by biasing the detector and checking the signals, either from the scalers or with a scope. One should clearly see cosmic rays; if that is not the case, the phototubes are likely miss connected | ||
installation_fp_sci.txt · Last modified: 2023/08/18 10:19 by noji
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