Calibration of Toxic and Harmful Gas Detectors
There are many types of gas detectors, one of which is the toxic and harmful gas detector. Toxic and harmful gas detectors are mainly used in the fields of chemical industry and coal mining, especially before entering a new environment, it is necessary to do gas detection. The gas detector can effectively detect the concentration of gas to ensure that we work in a safe environment!
Generally speaking, each sensor corresponds to a specific detection gas, but any gas detector cannot be the most effective. Therefore, when selecting a gas sensor, it is necessary to understand the detection interference of other gases to the sensor as much as possible, so as to ensure its accurate detection of specific gases.
Toxic and harmful gas detectors, like other analytical and testing instruments, are measured by a relative comparison method: first, a zero gas and a standard concentration gas are used to calibrate the instrument, and the standard curve is obtained and stored in the instrument. During the measurement, the instrument compares the electrical signal generated by the gas concentration to be measured with the electrical signal of the standard concentration, and calculates an accurate gas concentration value. Therefore, zeroing the instrument at any time and frequently calibrating the instrument are essential tasks to ensure the accuracy of the instrument measurement. It should be noted that many gas detectors can replace the detection sensor at present, but this does not mean that a detector can be equipped with different detector probes at any time.
Whenever the probe is changed, the instrument must be recalibrated in addition to the sensor activation time. In addition, it is recommended to test the response of the standard gas used for the instrument before using it to ensure that the instrument really plays a protective role. If it is used in an open place, such as an open workshop, such an instrument is used as an emergency alarm, and a portable diffusion gas detector can be used, because it can continuously, real-time, and accurately display the concentration of toxic and harmful gases on site. The fixed detector is generally a two-body type. The detection head composed of a sensor and a transmitter is installed on the detection site as a whole, and the secondary instrument composed of a circuit, power supply and display and alarm device is installed in a single place as a whole, which is convenient for monitoring. Its detection principle is the same as that mentioned in the previous section, but it is more suitable for the characteristics of continuous and long-term stability required by fixed detection in terms of process and technology.
In short, the calculation of the gas detector is a very complicated process. We need a lot of patience during the detection process. Only with enough patience can we ensure that there will be no problems during the detection process.
