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venting_pumping_intermediate_image_box [2024/01/11 09:54]
noji [Evacuating the Chamber]
venting_pumping_intermediate_image_box [2024/01/11 10:29]
noji [Emptying Detectors]
Line 23: Line 23:
 ===== Emptying Detectors ===== ===== Emptying Detectors =====
   - Set “PPAC Setpoint” to 0 Torr.   - Set “PPAC Setpoint” to 0 Torr.
-  - Click **EMPTY** on the “GHS_II-PPAC_Main” page to begin pumping out the gas quickly.+  - Click **EMPTY** on the “GHS_II-PPAC_Main” page to open valves #3 and #4 which will allow for pumping out the gas quickly.
   - When “PPAC Pressure” reads < 0.1 Torr, click **MAN** and then **AUTO**. This will release the remaining gas into the diagnostics box.   - When “PPAC Pressure” reads < 0.1 Torr, click **MAN** and then **AUTO**. This will release the remaining gas into the diagnostics box.
   - Monitor D2340 pumping station and ensure the TMP stays on and TGV remains open. If not, contact the Vacuum Operation group.   - Monitor D2340 pumping station and ensure the TMP stays on and TGV remains open. If not, contact the Vacuum Operation group.
Line 31: Line 31:
 ===== Venting the Chamber ===== ===== Venting the Chamber =====
  
 +From the S800 Main Vacuum page, go to the Intermediate Image - RBT_BTS32 D2430 Pumping Station page, and ensure
 +  * that the PPACs have been unbiased,
 +  * that this pumping station has been isolated by having the gate valves **D2426 BGV** and **D2436 BGV** closed, and that the IG has been turned off, and
 +  * that the turbo pump gate valve TVG is closed.
 +
 +To vent the chamber:
 +  - Monitor **RBT_BTS32:BPG_D2430:VP_RD** and **S800_GHS:PI_D2431:V_RD_AB** in a data browser,
 +  - close **RV**, the valve to the roughing pump, and
 +  - open **Vent**.
 +
 +The PPAC pressure S800_GHS:PI_D2431:V_RD_AB should closely follow the chamber pressure  
 +RBT_BTS32:BPG_D2430:VP_RD
 ===== Evacuating the Chamber ===== ===== Evacuating the Chamber =====
  
venting_pumping_intermediate_image_box.txt · Last modified: 2024/01/12 09:37 by noji