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    Calibration of Fixed Gas Detectors

    A gas detector is a kind of instrumentation tool for gas leakage concentration detection, including a portable gas detector, hand-held gas detector, fixed gas detector, online gas detector, etc. They mainly use gas sensors to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases.

    The gases that ATO fixed gas detector can measure are NH3, CO, EX, H2S, O2, CH4, CL2, H2, N2, NO, O3, etc. It supports 12~36V DC voltage. Its measurement range is 0~50000ppm, 0~100%VOL, and 0~100%LEL.

    For the zero calibration

    In clean air, press the MENU, then press “+” to enter F04, then press OK, then press BACK. The detected data will become zero. Prepare the standard gas, we use iso-butane for calibration.

    • Step 1: Press the Menu, then press “+” to enter F07, change the data to be the same as the value of the standard gas, then press OK.
    • Step 2: Press the Menu, then press “+” to enter F08, now you will see it shows 0, change it to 1, then press OK and back.
    • Step 3: Connect the sensor with the standard gas, gas flow rate is 500mL/min, wait till the data is stable, then press the OK for 3 seconds.

    The calibration is finished. If the detected data difference among the detectors is only 2 or 3, then you can just do the zero calibration. Only when the detected data difference is above 10, then you need to do the span calibration by standard gas.

    If you want to see more details of the calibration, please check:

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