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installation_fp_sci [2023/02/13 12:05]
noji Updated descriptions about the FP GHS based upon "S800 Focal Plane Gas Handling System Operation Manual" (v3) provided by Jorge to SN on 2/12/2023.
installation_fp_sci [2023/02/17 20:13]
pereira [Pumpdown of FP Chamber]
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 ===== Venting FP Chamber ===== ===== Venting FP Chamber =====
   - Ensure the IG in the Focal Plane Pumping Station is off. This page can be found in FRIB EXP Main → S800 → Vacuum Main (Primary Pages) → Focal Plane.   - Ensure the IG in the Focal Plane Pumping Station is off. This page can be found in FRIB EXP Main → S800 → Vacuum Main (Primary Pages) → Focal Plane.
-  - Return to the “FP_State_Buttons” page and under the D2708 tab click **AUTO**. This will close all valves and allow the system to enter Vent mode+  - Return to the “FP_State_Buttons” page and for each of the D2708 and D2703 tabs click **PUMP**.  
-  - Click **VENT**. This will expose the vessels to the Pumping Station. Observe the FPG on the “D2430 Pumping Station” page to ensure the Turbo Pump is not overloaded.+  - Click **VENT** for each tab. This will expose the vessels to the Pumping Station. Observe the FPG on the “D2686 Pumping Station” page to ensure the Turbo Pump is not overloaded.
   - Once the FPG bottoms out, check the box next to “Valve Controls”, then click **Close** next to the Turbo Gate Valve (TGV).    - Once the FPG bottoms out, check the box next to “Valve Controls”, then click **Close** next to the Turbo Gate Valve (TGV). 
   - If the system will only be vented for a short time, leave the TMP on, otherwise turn it off.   - If the system will only be vented for a short time, leave the TMP on, otherwise turn it off.
-  - Plot PT1, PT2, and PT3 from the “GHS_FP_Main” page as well as BPG from the “D2430 Pumping Station” page on the same axis.+  - Plot PT1, PT2, and PT3 from the “GHS_FP_Main” page as well as BPG from the “D2686 Pumping Station” page on the same axis.
   - Briefly (~2 seconds) open the vent valve by clicking **Open** next to the valve labeled “Vent” then click **Close**. Check that all the pressures are increasing at the same rate.   - Briefly (~2 seconds) open the vent valve by clicking **Open** next to the valve labeled “Vent” then click **Close**. Check that all the pressures are increasing at the same rate.
   - Again, open the vent valve and observe the pressure for 30 seconds to ensure the pressures are increasing at the same rate among all four gauges. If a difference of > 1 Torr is observed between any two gauges, click **Close** on the vent valve.   - Again, open the vent valve and observe the pressure for 30 seconds to ensure the pressures are increasing at the same rate among all four gauges. If a difference of > 1 Torr is observed between any two gauges, click **Close** on the vent valve.
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   - Open “Focal Plane Pumping Station” page from FRIB EXP Main → S800 → Vacuum Main (Primary Pages).   - Open “Focal Plane Pumping Station” page from FRIB EXP Main → S800 → Vacuum Main (Primary Pages).
   - Open “GHS_FP_Main” and “FP_State_Buttons” pages from FRIB EXP Main → S800 → GHS Pages (Secondary Pages).   - Open “GHS_FP_Main” and “FP_State_Buttons” pages from FRIB EXP Main → S800 → GHS Pages (Secondary Pages).
-  - Plot PT1, PT2, and PT3 from the “GHS_FP_Main” page as well as BPG from the “D2430 Pumping Station” page on the same axis.+  - Plot PT1, PT2, and PT3 from the “GHS_FP_Main” page as well as BPG from the “D2686 Pumping Station” page on the same axis.
   - On the “FP_State_Buttons” page change from “Vent” mode to “Pump” mode by clicking **PUMP** in both the D2703 and D2708 tabs.   - On the “FP_State_Buttons” page change from “Vent” mode to “Pump” mode by clicking **PUMP** in both the D2703 and D2708 tabs.
   - Check the box next to “Valve Controls” on the “D2686 Pumping Station” page.   - Check the box next to “Valve Controls” on the “D2686 Pumping Station” page.
   - If the TMP is off and Foreline Valve (FV) is closed, open the Roughing Valve (RV) briefly (2 seconds) by clicking **Open** and observe the behavior of the pressure gauges. If they all decrease at the same rate, again click **Open** to begin rouging out the chambers.   - If the TMP is off and Foreline Valve (FV) is closed, open the Roughing Valve (RV) briefly (2 seconds) by clicking **Open** and observe the behavior of the pressure gauges. If they all decrease at the same rate, again click **Open** to begin rouging out the chambers.
-  - If the TMP is still on (this could be the case for a short vent period), click **Close** on the FV to protect the pump 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 (FVbefore doing step 6. 
-  - When the BPG reads zero, **Close** RV and **Open** FV. Turn the TMP on if it is not already. When the TMP is “at speed” **Open** the TGV. If the TMP was off before opening the TGV, the chamber pressure may have risen to a point where the TGV closes automatically. If the BPG still reads < 1 Torr, attempt to **Open** the TGV again.+  - 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” **Open** the TGV. If the TMP was off before opening the TGV, the chamber pressure may have risen to a point where the TGV closes automatically. If the BPG still reads < 1 Torr, attempt to **Open** the TGV again.
   - 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