40 • T2A Transmitter
6. Press the MENU button to save the gas concentration setting and to advance to the
calibration start screen.
7. Unscrew and remove the rain guard from the assembly.
8. Install the calibration cup to the T2A’s sensor housing.
9. Screw the regulator into the calibration cylinder.
10. Use the sample tubing to connect the regulator to the calibration cup.
11. Turn the regulator knob counterclockwise to open the regulator.
12. Press the MENU button to begin calibrating the sensor. The unit automatically begins the
calibration process. During calibration, the display shows a countdown of the time
remaining until the process is complete. The amount of time varies based on the gas type.
NOTE:
Once the calibration countdown has started, the process cannot be stopped without
disconnecting the power from the unit.
13. When calibration is complete, remove the calibration cup from the sensor housing and
reinstall the rain guard.
NOTE:
If the sensor responds extremely slow, or does not respond to the applied gas, it may
indicate a failed sensor element. The sensor element will need to be replaced before
completing the zero and calibration process.
14. Turn the regulator knob clockwise to close the regulator.
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