This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
gas_handling_system [2017/01/22 16:50] pereira [Detector gas handling system] |
gas_handling_system [2017/06/07 13:15] pereira |
||
---|---|---|---|
Line 3: | Line 3: | ||
* [[#General information]] | * [[#General information]] | ||
* [[#LabView Control Program]] | * [[#LabView Control Program]] | ||
- | * [[# | + | * [[# |
* [[#Filling Ion Chamber with Gas]] | * [[#Filling Ion Chamber with Gas]] | ||
* [[#Filling CRDC1 and CRDC2 with Gas]] | * [[#Filling CRDC1 and CRDC2 with Gas]] | ||
* [[#Removing Gas from Focal Plane Detectors]] | * [[#Removing Gas from Focal Plane Detectors]] | ||
- | * [[#Tracking Gas bottles pressures]] | + | * [[#Tracking Gas bottles pressures|Tracking Gas bottles pressures from Barney]] |
- | + | * [[# | |
===== General Information ===== | ===== General Information ===== | ||
Required controls and monitoring | Required controls and monitoring | ||
Line 49: | Line 50: | ||
* The display unit for the pressure at the pump has a needle indicator and is mounted under the [[Stations# | * The display unit for the pressure at the pump has a needle indicator and is mounted under the [[Stations# | ||
* Ensure that the main valves on the gas bottles are open (see pictures below) | * Ensure that the main valves on the gas bottles are open (see pictures below) | ||
+ | * Open valves downstream of regulators in each bottle | ||
* Ensure that the gas bottles are not empty | * Ensure that the gas bottles are not empty | ||
* The gas regulators are not normally adjusted. They should all be set to provide a pressure around 20 psi | * The gas regulators are not normally adjusted. They should all be set to provide a pressure around 20 psi | ||
Line 78: | Line 80: | ||
* Click on the tab labeled **Slot 8 (M-card) IC** to access the page with the pressure set point control | * 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 | * Enter the desired pressure (typically 300 Torr) in the field under the knob labeled Set Point | ||
+ | * Click button labeled **Update Set Point** | ||
* Click button labeled **Return to AUTO Mode** on left to start filling/ | * Click button labeled **Return to AUTO Mode** on left to start filling/ | ||
* 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) | * 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** | * Open **valve 9** | ||
+ | * If necessary, the filling process can be stopped at any time by pressing the valve button labeled **Close MFC #1** | ||
* The filling process will take several minutes | * The filling process will take several minutes | ||
Line 110: | Line 113: | ||
* Fill CRDCs | * Fill CRDCs | ||
* Enter the desired fill pressure and start the automatic filling process | * 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 | * 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** | * Enter the desired pressure (typically 40 Torr) in the field under the knob labeled **Set Point** | ||
+ | * Click button labeled **Update Set Point** | ||
* Click button labeled **Return to AUTO Mode** on left to start filling/ | * Click button labeled **Return to AUTO Mode** on left to start filling/ | ||
* 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) | * 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) | ||
+ | * Open **valve 25** | ||
* If necessary, the filling process can be stopped at any time by pressing the valve button labeled **Close MFCs #2 & #3** | * 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 | * The filling process will take several minutes | ||
Line 156: | Line 159: | ||
* Open **valves 6 and 22** | * Open **valves 6 and 22** | ||
- | * Enter S3 vault and close main valves | + | * Enter S3 vault and close valves |
===== Tracking Gas bottles pressures ===== | ===== Tracking Gas bottles pressures ===== | ||
Line 164: | Line 167: | ||
{{: | {{: | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ===== Replacing Gas bottles ===== | ||
+ | In preparation |