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installation_fp_sci [2023/02/17 20:45]
pereira [Pumpdown of FP Chamber]
installation_fp_sci [2023/02/17 20:45]
pereira [Pumpdown of FP Chamber]
Line 44: Line 44:
   - If the TMP is still on (this could be the case for a short vent period), turn it off and close the foreline valve (FV) before doing step 6.   - If the TMP is still on (this could be the case for a short vent period), turn it off and close the foreline valve (FV) before doing step 6.
   - When the BPG reads below 200 mTorr, **Close** RV and **Open** FV. Turn the TMP on if it is not already. When the TMP is “at speed” (~30,000 RPM), **Open** the TGV.    - When the BPG reads below 200 mTorr, **Close** RV and **Open** FV. Turn the TMP on if it is not already. When the TMP is “at speed” (~30,000 RPM), **Open** the TGV. 
-  - NOTE: before reach "at speed", pressure in the chamber, as read by BPG, might increase to a point where TGV can not be open. If that is the case, turn off the turbo pump, close FV, and repeat steps 6, 7, 8 but this time, wait for BPG to read below 100 mTorr. Then try again step 8.+  - NOTE: before TMP reaches "at speed", pressure in the chamber, as read by BPG, might increase to a point where TGV can not be open. If that is the case, turn off the turbo pump, close FV, and repeat steps 6, 7, 8 but this time, wait for BPG to read below 100 mTorr. Then try again step 8.
   - Allow the TMP to pump on the system until the IG reads < 1E-5 Torr.   - Allow the TMP to pump on the system until the IG reads < 1E-5 Torr.
   - On the “FP_State_Buttons” page click **RUN** to enter run mode.   - On the “FP_State_Buttons” page click **RUN** to enter run mode.
installation_fp_sci.txt · Last modified: 2023/08/18 10:19 by noji