ION ARA Series Instrument User Manual page 18

ARA Instrument User Manual V1.1
Attach the regulator, tubing and calibration cap to the cylinder so it's ready for use.
Click 'Sensor Calibration' (a new window will pop-up)
NOTE: Ensure that the Span value is the same as the calibration gas concentration. If not use the Up/Down
arrows to adjust (refer to the label on calibration gas cylinder)
IMPORTANT: Ensure you are in a clean fresh air environment.
Click Calibration, a zero is then established (very quickly)
Unrivaled Gas Detection. ionscience.com/usa
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