20
AirAware
Calibration
Industrial Scientific recommends that a full instrument calibration be
performed using a certified concentration(s) of Industrial Scientific Oldham
branded calibration gas(es) quarterly to ensure maximum accuracy. Use of
calibration gases from manufacturers other than Industrial Scientific Oldham
may void product warranties and limit liability claims against the
manufacturer.
Calibrating the AirAware is simply applying a known concentration of gas to
the unit, and “telling” the unit to self-adjust to read that concentration. The
calibration values are pre-programmed into the instrument in order to simplify
the procedure. For details on changing this pre-programmed value, refer to
page 15.
Standard AirAware Calibration Settings
CO - 100 ppm Cl2 - 10 ppm
HCl - 10 ppm
H2S - 25 ppm
NH3 - 25 ppm NO - 25 ppm
NO2 - 5 ppm
O2 – 20.9%
SO2 - 5 ppm
To calibrate the instrument:
• If necessary, connect zero air gas bottle, regulator and tubing to the
calibrator adapter.
• Press and hold the
button. After 5 seconds, the display will blink five
times and "Zeroing" will appears on the display. Release the
button.
• After the unit finishes auto-zeroing, it will display either PASS or FAIL. If
the sensor passes the zeroing function, switch gas cylinder and connect the
calibration adapter to the sensor opening and start the flow of gas to the
sensor by opening the regulator. Maintain the flow of gas to the sensor
until the display indicates "PASS XXX" or "FAIL". During this time the
display will flash the SPAN RESERVE value of the sensor. Once
calibration is complete, the display will flash "PASS XXXX" or
"FAILED".
• If the unit indicates “PASS XXX,” document the XXX (span reserve)
value in your calibration records. Remove calibration gas and disassemble
regulator from cylinder.***
