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Step 1: Faraday Calibration

  1. Close out Analog Spectra, Turn off Filament and then Close 'Process Eye Window' fully, and reopen., Turn off Filament, CLOSE OUT EasyView .
    1. If easyview screen is open, rga can't be accessed during calibration, resulting in calibration error
  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. 
  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
  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.
  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.
  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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