venting_pumping_intermediate_image_box
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
venting_pumping_intermediate_image_box [2024/01/11 10:29] noji [Emptying Detectors] |
venting_pumping_intermediate_image_box [2024/09/26 08:50] (current) pereira [Evacuating the Chamber] |
||
|---|---|---|---|
| Line 2: | Line 2: | ||
| * [[#General information]] | * [[#General information]] | ||
| * [[#Emptying Detectors]] | * [[#Emptying Detectors]] | ||
| + | * [[#Venting the Chamber]] | ||
| + | * [[# | ||
| * [[#Filling and Running Detectors]] | * [[#Filling and Running Detectors]] | ||
| * [[# | * [[# | ||
| Line 22: | Line 24: | ||
| ===== Emptying Detectors ===== | ===== Emptying Detectors ===== | ||
| + | - Double check that the detectors have been unbiased. | ||
| - Set “PPAC Setpoint” to 0 Torr. | - Set “PPAC Setpoint” to 0 Torr. | ||
| - Click **EMPTY** on the “GHS_II-PPAC_Main” page to open valves #3 and #4 which will allow for 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, turn off IG and click **MAN** and then **AUTO**. This will open valve #6 to 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. | ||
| - | - Valves #1-5 should be closed and valve #6 should remain open. From this state click PUMP to enter pump mode and leave the system in this state until it is ready to be filled. | + | - Valves #1-5 should be closed and valve #6 should remain open. From this state click **VENT** and then **PUMP** to enter pump mode and leave the system in this state until it is ready to be filled. |
| - | * Jorge noted on 2/12/2023 that this step did not work; he reported that when he clicked **PUMP** nothing happened. Instead, he had to “manually” enter the PV name associated with this command and changed from 0 to 1. He speculated that this was most likely due to a CS Studio problem. | + | |
| ===== Venting the Chamber ===== | ===== Venting the Chamber ===== | ||
| Line 34: | Line 35: | ||
| * that the PPACs have been unbiased, | * 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 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. | + | * that the turbo pump gate valve **TVG** is closed. |
| + | |||
| + | The TMP can be turned off at this time. | ||
| To vent the chamber: | To vent the chamber: | ||
| - | - Monitor | + | - Let the Control Room and the Vacuum Operation Group be aware as EXP alarms may occur, |
| - | - close **RV**, the valve to the roughing pump, and | + | - put the GHS in vent mode by clicking **VENT** (valves #5 and #6 are open), |
| - | - open **Vent**. | + | - monitor |
| + | - ensure that **RV**, the valve to the roughing pump, is closed, and | ||
| + | - open **Vent** | ||
| The PPAC pressure S800_GHS: | The PPAC pressure S800_GHS: | ||
| - | RBT_BTS32: | + | RBT_BTS32: |
| - | ===== Evacuating | + | ===== Pumping down the Chamber ===== |
| + | |||
| + | Ensure | ||
| + | * that the chamber is closed | ||
| + | * that the pressure-relief mechanism (on the north side of the chamber, see picture below) is sealing (if not, adjust the flange back in place) | ||
| + | {{ : | ||
| + | * that the manual valve (see picture below) is closed. | ||
| + | {{ : | ||
| - | {{:wiki: | + | To evacuate the chamber: |
| + | - double-check and make sure that the manual valve is closed, | ||
| + | - put the GHS in pump mode by clicking **PUMP** (valves #3, #5, #6 are open), | ||
| + | - close **FV** below the TMP, and | ||
| + | - open **RV**. | ||
| + | - A message window, which reads, " | ||
| + | - now open the manual valve slowly while watching the local display of the Pirani gauge. Open slowly such that the pressure reading (in Torr) goes down by about 1 unit per second initially. The valve needs to open more as the pressure goes further down. | ||
| + | - On the CSS window, after D2430 turns to yellow indicating that the section is in "POOR VACUUM", | ||
| + | - Turn on TMP, and wait until it reaches the normal rotation (~40,000 rpm). | ||
| + | - Open **TGV**. | ||
| + | - Be sure to go back to S3 and close the manual valve. | ||
| ===== Filling and Running Detectors ===== | ===== Filling and Running Detectors ===== | ||
| - | - If in Vent Mode, click **PUMP** then click **RUN** to enter Run Mode. | + | - If in Vent Mode, click **PUMP** then click **RUN** to enter Run Mode. The valves #1 opens and #3 remains open (#5 and #6 will be closed, and the GHS lines will be isolated from the chamber). |
| - If in Pump Mode, click **RUN** to enter Run Mode. | - If in Pump Mode, click **RUN** to enter Run Mode. | ||
| - Plot and monitor IG_D2430: | - Plot and monitor IG_D2430: | ||
venting_pumping_intermediate_image_box.1704986943.txt.gz · Last modified: 2024/01/11 10:29 by noji
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
