Smart Gas Detector / G-Tag ***
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User Precautions for Calibration
i. It is recommended to calibrate the gas concentration in a room temperature. Since toxic
gas over certain concentration should be used for span calibration of toxic gas
sensor(CO/H
2
S), ventilate the surrounding area sufficiently and perform in the environment
with vent for toxic gas.
ii. Since our Bluetooth dedicated app should be used with the smartphone for calibration,
such process should be performed in a safe place (explosion-proof area).
D. How to Calibrate Gas Concentration
The following is the description on how to calibrate the gas concentration of G-Tag,
the smart gas detector. The gas concentration of this product is calibrated using the
dedicated app (Smart Gas Sniffer) of Bluetooth of the company. Separate test gas is
required to perform span calibration.
D.1 Terminology
D.1.1 Calibration
The process of adjusting the sensor output reading to the actual gas concentration.
D.1.2 Zero calibration
The process of concentration in the condition of Oxygen 20.9% and toxic gas
concentration 0 ppm.
D.1.3 Span calibration
The process of output at the relevant concentration after injection of specific test gas.
D.1.4 Test gas
Standard gas used in span calibration(Ex: Oxygen 18%, Carbon monoxide 100 ppm,
Hydrogen sulfide 25ppm gas)
Cautions
If oxygen 20.9%, toxic gas 0 ppm value are not detected at room temperature
or 50% relative humidity, perform zero calibration.
Span calibration should be performed at least every 6 months for accurate
detection results. Separate test gas is required for span calibration.
Contact NodeTalks Corp.. if any problem occurs during calibration.
