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1. Log in to computer, go into 'Process Eye Professional' 
2. Click on 'Recipe List', then click on 'Easy View'
3. The RGA connected to computer through ethernet will have a distinct filled in symbol to its left. 
   1. This will open up an EasyView tab of respective RGA device
   2. If the device does not automatically connect, refer to this how-to document: https://confluence.slac.stanford.edu/x/dRoEEw
4. Turn on the filament, and select analog data view (see section 10 of HPS document for more details on Process Eye Professional).
5. Collect data for 5 minutes at accuracy 5 before continuing. At Accuracy of 3 is fine.
6. Note the pressure at the cold cathode. Slowly open the leak valve until the pressure slowly starts to rise. Keep opening the leak valve until the pressure at the cold cathode reads 1e-6 torr.
   1. At this point the 28 AMU (nitrogen) should be the highest peak in the RGA scan.
7. Open a bar graph and use the marker tool to select all the highest peaks on the graph. At accuracy of 6.
   1. Input the values to the provided spreadsheet to get the pressure that the RGA thinks it sees and to then get the percentage of the total pressure the nitrogen provides
   2. Spreadsheet: https://docs.google.com/spreadsheets/d/15D6ebvvUcVcYYJx70cF8eDa5uTvCGoae9l0nPlBS-ts/edit?usp=sharing 
      1. Example on Cart 2 Tab, at the top (reference Figure 3). Copy & paste calibration example to desired spot

Step 1: Faraday Calibration

1. Turn off Filament and then Close 'Process Eye Window' fully, and reopen.
2. Select the Faraday calibration and hit next
3. In the next window, be sure that the correct RGA head is selected and hit next. 
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4. Under “configuration name” select EasyView. This window will show you the current settings for the device that was selected in the previous screen. Write down these values (Current Faraday Sensitivity, last calibrated, Electron energy, Filament Emission, Ion Energy, and Extractor Volts). Hit next
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5. This window asks to select the mass peak to use for calibration. Type 28 into the field for the mass to be used for Faraday calibration and use the pressure at the cold cathode (1e-6 Torr) as the anticipated process pressure gauge reading. Use the calculated contribution percentage from the spreadsheet. Hit next.
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6. This window gives you various runtime options. Select:
   1. Run with no operator intervention
   2. Acquire data from the peak center only
   3. Apply the results of this calibration to both filaments.
   4. **** Double check that the pressure at the cold cathode still reads what you said the anticipated pressure gauge reading would be and if not open the leak valve slightly more and hit finish.
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7. Start collecting data in EasyView with the Faraday cup and wait until it gives a sum of scanned mass value. Compare this to the value at the cold cathode. If it is within a factor of 3 of the cold cathode then continue. If not, repeat the calibration.

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