installation_fp_sci
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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installation_fp_sci [2017/06/13 12:05] pereira [Closing focal-plane chamber] |
installation_fp_sci [2017/06/13 12:10] pereira old revision restored (2017/06/13 12:06) |
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| ==== Open focal-plane chamber ==== | ==== Open focal-plane chamber ==== | ||
| - | * After venting the FP chamber, the pressure inside the chamber is slightly above atmospheric due to the dry N2 pumped. Before opening the chamber, it is recommended to vent the extra N2 by " | + | * After venting the FP chamber, the pressure inside the chamber is slightly above atmospheric due to the dry N2 pumped. Before opening the chamber, it is recommended to vent the extra N2 by " |
| * Unlock the padlock protecting the power brakers of the switch controls to open the chamber, and press the **START** button {{: | * Unlock the padlock protecting the power brakers of the switch controls to open the chamber, and press the **START** button {{: | ||
| * Turn the switch to open the clamps holding the FP chamber. The weight held by the hydraulic piston will increase {{: | * Turn the switch to open the clamps holding the FP chamber. The weight held by the hydraulic piston will increase {{: | ||
| Line 39: | Line 39: | ||
| ==== Pumping focal-plane chamber ==== | ==== Pumping focal-plane chamber ==== | ||
| + | * Make sure that the pressure-relief valve (see above) is in place (closed). | ||
| * In order to pumpdown the chamber, make sure that the manual vent valve is closed. Start manual pump to get a pressure below 50 mtorr {{: | * In order to pumpdown the chamber, make sure that the manual vent valve is closed. Start manual pump to get a pressure below 50 mtorr {{: | ||
| * 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 | ||
installation_fp_sci.txt ยท Last modified: 2023/08/18 10:19 by noji
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