& nbsp; The hydrogen detector is the 1 kind of intrinsically safe equipment that can continuously detect the concentration of toxic gases and is suitable for explosion-proof places. The hydrogen detector calibrates the hydrogen detector by using a zero gas and a standard concentration gas, and a standard curve will be obtained and stored in the hydrogen detector. After that, when the user detects the hydrogen in the work site, the hydrogen detector will compare the electrical signal generated by the measured hydrogen concentration in the air with a pre-calibrated value in a free diffusion manner, and calculate the exact concentration of hydrogen in the detection site. It is precisely because of such a detection principle that the hydrogen detector should be verified after being used for a period of time to ensure the accuracy of the value. Then hydrogen detector how to check it? The following Yi Yuntian Xiaobian for you to introduce:

calibration method of hydrogen detector:

1. in principle, the standard sample gas that has been metrology certified to match the tested gas should be selected. The same measured medium selected standard gas is different, the alarm point is also different.

2. Before the hydrogen detector is calibrated, the surrounding environment of the probe shall be free of combustible gas. Assuming there is combustible gas, the rain cover should be removed first, a certain amount of clean air should be filled, and then the sample gas should be connected to ensure the calibration.

3. when the measured gas is a hydrocarbon mixture, isobutane is the sample gas, followed by propane.

4. for hydrocarbon mixtures with a large difference in heat generated during incineration of non-hydrocarbon mixtures or gases with lower explosive limit concentration, butane, isobutane, propane and other easily available and stable single-component fuels can be used as sample gases when necessary. At this moment, it is necessary to adjust the range of the alarm according to a certain detection signal conversion contact.

The above introduction is the calibration method of the hydrogen detector. In the process of using the hydrogen detector, we should not only do a good job in the calibration of the hydrogen detector, but also carry out zero calibration operation on the hydrogen detector at any time, which is also to ensure the detection accuracy of the CCDQ hydrogen detector.