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installation_fp_sci [2023/02/17 20:09] pereira [Pumpdown of FP Chamber] |
installation_fp_sci [2023/02/17 20:16] pereira [Pumpdown of FP Chamber] |
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- 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), | + | - If the TMP is still on (this could be the case for a short vent period), |
- | - 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. |
+ | - NOTE: before reach "at speed", | ||
+ | - 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. |