GEM-2000 Easy Steps - Field Calibration
Printable Version
Field Calibrating the GEM-2000
- Turn Instrument On (By pressing on the Red Button).
- After the instrument has finished it's initial process, it will enter the Main Screen.
- Press 1 Menu
- Use your Up(2) or Down(8) keys to scroll the "Field Calibration" then press Enter in your instrument
- Press 3 Edit target Concentrations
- Enter manually the target concentrations for CH4
- Press Enter to move to CO2, Enter CO2 Target Concentration
- Press Enter to move to O2, Enter O2 Target Concentration
- Press Enter to complete.
- Connect Calibration (CAL) Gas Bottle with 0% CH4 (example 4% O2, Bal N2)
- Allow gas to flow for approximately 30 seconds to ensure a compete purge of any gas in instrument
- Press Enter to bring up Calibration Menu
- Choose Zero Channels, Press Enter
- Choose Zero CH4 Press Enter when done.
- If Calibration was successful you should see the following message “User Zero Complete”
- Connect CAL Gas Bottle With 0% O2 (example 50% CH4 35%CO2 Bal N2)
- Allow gas to flow for approximately 30 seconds to ensure a compete purge of any gas in instrument
- Press Enter to bring up Calibration Menu
- Choose Zero Channels press Enter
- Choose Zero O2 press Enter when done
- If Calibration was successful you should see the following message “User Zero Complete”
- Press Enter to go to Calibration Menu
- Choose Span Channels, Press Enter
- Choose Span CH4
- Verify that CH4 Calibration (CAL) Gas is still connected to instrument (Wait 30 seconds for gas to flow thru instrument)
- Press Enter to Set CH4 Span
- The following message should appear “Calibration Complete”
- Press Enter to go to Calibration Menu
- Choose Span Channels, Press Enter
- Choose Span CO2
- Verify that CH4 CAL Gas is still connected to instrument (Wait 30 seconds for gas to flow thru instrument)
- Press Enter to Set CO2 Span
- The following message should appear “Calibration Complete”
- Connect Gas Bottle With 4% O2 (example. 0% CH4 0% CO2 4%O2)
- Allow gas to flow for approximately 30 seconds to ensure a compete purge of any gas in instrument
- Press Enter to go to Calibration Menu
- Choose Span Channels, Press Enter
- Choose Span O2
- Press Enter to Set O2 Span
- “Field Calibration is Complete”
- We suggest taking a reading from CAL GAS Bottles to verify that calibration has been done correctly.