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--- gas_handling_system [2013/12/13 21:05]
pereira
+++ gas_handling_system [2013/12/13 21:28]
pereira
@@ Line 30: / Line 30: @@
 ===== Preparation of Gas bottles =====
-  * In Data-U6
+==== In Data-U6 ====
       * Ensure I265GV is closed to isolate focal plane vacuum chamber from the rest of the beamline
       * Confirm that the focal plane chamber is under vacuum
-      * Confirm that the only open gas handling system valves are 4, 5, 6, 20, 21, and 22
+      * Confirm that the only open gas handling system valves are **4, 5, 6, 20, 21, and 22**
-  * In the S3 vault
+==== In the S3 vault ====
       * Ensure that the gas handling system roughing pump is running and has a good vacuum
            * The pump sits on the floor under the focal plane behind the south support post
@@ Line 47: / Line 47: @@
+===== Filling Ion Chamber with Gas =====
-Filling Ion Chamber with Gas
+  * Follow instructions under [[#Preparation of Gas bottles|Preparation of Gas bottles]]
-	Follow instructions under PREPARATION FOR FILLING DETECTORS WITH GAS above
+  * Monitor the pressure of the focal plane vacuum chamber (as read out via the I264IG ion gauge) while detectors are being filled with gas; the pressure normally stays below 5E-5 Torr.
-	Monitor the pressure of the focal plane vacuum chamber (as read out via the I264IG ion gauge) while detectors are being filled with gas; the pressure normally stays below 5E-5 Torr.
-	Confirm that the detector pressure as indicated by the display labeled P.T. #1 reads below a couple of Torr
-	To zero this display:
-	Click on the Slot 3 (PT1) tab to access the details page for PT #1
-	Click the Zero Sensor button
-	Click the Valves tab at the top of the LabView window to return to the overview display of the gas handling system
-	Close valve 6
-	Open valve 2; the flow reading at MFC #1 should jump momentarily
-	Fill Ion chamber
-	Enter the desired fill pressure and start the automatic filling process
-	Click on the tab labeled Slot 8 (M-card) IC to access the page with the pressure set point control
-	Enter the desired pressure (typically 300 Torr) in the field under the knob labeled Set Point
-	Click button labeled Return to AUTO Mode on left to start filling/regulation
-	Click the Valves tab at the top of the LabView window to return to the overview display of the gas handling system to monitor filling
-	The flow readings for MFC #1 will increase and eventually disappear as the readout value overflows the display field (this is normal behavior)
-	If necessary, the filling process can be stopped at any time by pressing the valve button labeled Close MFC #1
-	Open valve 9
-	The filling process will take several minutes
-	When the detector is filled, close valve 5
+  * Confirm that the detector pressure as indicated by the display labeled P.T. #1 reads below a couple of Torr
+      * To zero this display:
+          * Click on the **Slot 3 (PT1)** tab to access the details page for PT #1
+          * Click the **Zero Sensor** button
+          * Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system
-Filling CRDC1 and CRDC2 with Gas
+  * Close **valve 6**
-	Follow instructions under PREPARATIONS FOR FILLING DETECTORS WITH GAS above
+  * Open **valve 2**; the flow reading at MFC #1 should jump momentarily
-	Monitor the pressure of the focal plane vacuum chamber (as read out via the I264IG ion gauge) while detectors are being filled with gas; the pressure normally stays below 5E-5 Torr.
-	Confirm that the detector pressure as indicated by the display labeled P.T. #2 reads below a couple of Torr
+  * Fill Ion chamber
-	To zero this display:
+      * Enter the desired fill pressure and start the automatic filling process
-	Click on the Slot 4 (PT2) tab to access the details page for PT #2
+          * Click on the tab labeled **Slot 8 (M-card) IC** to access the page with the pressure set point control
-	Click the Zero Sensor button
+          * Enter the desired pressure (typically 300 Torr) in the field under the knob labeled Set Point
-	Click the Valves tab at the top of the LabView window to return to the overview display of the gas handling system
+          * Click button labeled **Return to AUTO Mode** on left to start filling/regulation
-	Close valve 22
+          * Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system to monitor filling. The flow readings for MFC #1 will increase and eventually disappear as the readout value overflows the display field (this is normal behavior)
-	Open valves 10 and 15
+      * If necessary, the filling process can be stopped at any time by pressing the valve button labeled **Close MFC #1**
-	Open valve 12; the flow reading at MFC #2 should jump momentarily
+      * Open **valve 9**
-	Open valve 17; the flow reading at MFC #3 should jump momentarily
+      * The filling process will take several minutes
-	Fill CRDCs
-	Enter the desired fill pressure and start the automatic filling process
+  * When the detector is filled, close **valve 5**
-	Click on the tab labeled Virtual Ch. 0 (CRDC) to access the page with the pressure set point control
-	Enter the desired pressure (typically 40 Torr) in the field under the knob labeled Set Point
-	Click button labeled Return to AUTO Mode on left to start filling/regulation
-	Click the “Valves” tab at the top of the LabView window to return to the overview display of the gas handling system to monitor filling
+===== Filling CRDC1 and CRDC2 with Gas =====
-	The flow readings for MFC #2 and MFC #3 will increase
-	The LabView application controls the gas mixing ratio based on the flow ratio (scaled with a calibration constant)
+  * Follow instructions under [[#Preparation of Gas bottles|Preparation of Gas bottles]]
-	If necessary, the filling process can be stopped at any time by pressing the valve button labeled Close MFCs #2 & #3
-	Open valve 25
+  * Monitor the pressure of the focal plane vacuum chamber (as read out via the I264IG ion gauge) while detectors are being filled with gas; the pressure normally stays below 5E-5 Torr.
-	The filling process will take several minutes
-	When the detector is filled, close valve 21
+  * Confirm that the detector pressure as indicated by the display labeled P.T. #2 reads below a couple of Torr
+      * To zero this display:
+          * Click on the **Slot 4 (PT2)** tab to access the details page for PT #2
+          * Click the **Zero Sensor** button
+          * Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system
+  * Close **valve 22**
+  * Open **valves 10 and 15**
+  * Open **valve 12**; the flow reading at MFC #2 should jump momentarily
+  * Open **valve 17**; the flow reading at MFC #3 should jump momentarily
+  * Fill CRDCs
+      * Enter the desired fill pressure and start the automatic filling process
+          * Click the **Zero Sensor** button
+          * Click on the tab labeled **Virtual Ch. 0 (CRDC)** to access the page with the pressure set point control
+          * Enter the desired pressure (typically 40 Torr) in the field under the knob labeled **Set Point**
+          * Click button labeled **Return to AUTO Mode** on left to start filling/regulation
+          * Click the **Valves** tab at the top of the LabView window to return to the overview display of the gas handling system to monitor filling. The flow readings for MFC #2 and MFC #3 will increase. The LabView application controls the gas mixing ratio based on the flow ratio (scaled with a calibration constant)
+      * If necessary, the filling process can be stopped at any time by pressing the valve button labeled **Close MFCs #2 & #3**
+      * Open **valve 25**
+      * The filling process will take several minutes
+  * When the detector is filled, close **valve 21**

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