This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
installation_fp_sci [2017/06/20 10:41] pereira [Vent focal-plane chamber] |
installation_fp_sci [2017/06/20 10:44] pereira [Vent focal-plane chamber] |
||
---|---|---|---|
Line 11: | Line 11: | ||
{{: | {{: | ||
* 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 ===== | ||
Line 40: | Line 41: | ||
===== 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 |