Detcon SG1 - Manual (Page 9)

8
Caution: Fresh Air Calibration should be performed in an environment of fresh air without any
influence of other gases. The calibration is performed on the assumption that the concentration
of Oxygen is 20.9%, the Inflammable Gas is 0% LEL and the concentration of Toxic Gas is
0ppm in the fresh air. Accordingly, it is not recommended to perform Fresh Air Calibration in
a closed space, and calibration should not be performed where hazardous gases can be
inhaled by operators.
Single Gas Calibration
To enter Calibration Mode, press the Arrow key and Power key simultaneously for 3 seconds.
CAL will be displayed and the
icon will blink. Press the Arrow key again for Single Gas
Calibration. The icon will blink. Press the Power key for 5 seconds to start Single Gas
Calibration. Do not to proceed with calibration without connecting the single gas.
60secs count down Concentration of Disconnect from
Single Gas Single Gas
When Single Gas Calibration starts, a 60 second countdown will be shown while the
Single Gas Calibration occurs. If the calibration is successful, the concentration value of
the gas connected at the moment will be indicated and the
icon will blink 3 times.
Afterwards, it will indicate the concentration value measured at the moment when the
Single Gas is disconnected. (Refer to the following table for correct gas concentration values)
If the calibration fails, the
icon will blink continuously. Re-calibrate and if the calibration
fails again, contact Detcon to replace the sensor.
Hold 5 secs
Calibration
Success
Calibration
Fail
60secs count down