In the daily use of the combustible gas detector, due to environmental factors, equipment aging and other reasons, zero drift may occur, resulting in inaccurate measurement. Therefore, in order to ensure its measurement accuracy, regular zero calibration of combustible gas detector is an indispensable part of ensuring safe production. Do you know how to calibrate combustible gas detector after zero drift? The following is a brief introduction by yiyuntian electronics:

The calibration method of combustible gas detector after zero drift mainly includes the following steps:

1. preparation phase

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(1) Confirm the drift phenomenon:

It is necessary to confirm whether the combustible gas detector does have zero drift phenomenon, which can be judged by observing the display value of the combustible gas detector in a gas-free environment.If the displayed value is not zero, a zero drift may have occurred.

(2) Prepare the calibration tool:

Calibrating a combustible gas detector usually requires tools such as a standard gas generator, standard gas, calibration instruments, and connecting lines. Therefore, we need to ensure that these tools are fully prepared and meet the calibration requirements.

(3) Check device status:

Before calibration, it is necessary to check whether the sensor, connecting pipeline and other components of the combustible gas detector are intact and whether they are in normal working condition.

2. calibration steps

(1) Zero Calibration:

Place the combustible gas detector in an interference-free environment and ensure that there is no interference from other gases.Use a standard gas generator to supply zero point gas (usually clean air or nitrogen) and adjust the flow rate to the appropriate value. After waiting for the indication of combustible gas detector to be stable, adjust the indication to zero according to the steps in the manual.

(2) Verify zero calibration:

After the zero calibration is completed, the zero gas can be introduced again for verification to ensure that the displayed value of the combustible gas detector has accurately returned to zero.

(3) Indication calibration (optional):

If you need a more accurate calibration, you can also perform an indication calibration. This usually involves calibrating the combustible gas detector with a standard gas of known concentration and adjusting its sensitivity or output signal to ensure that its displayed value is consistent with the concentration value of the standard gas.

3. subsequent actions and precautions