Gas detection instrument calibration and adjustment
In general, gas detectors need to be calibrated once a year, and those with strict accuracy requirements may even be calibrated every six months or every three months. The more times calibration is performed, the less likely the detector is to drift and the better the detection effect.
The calibration of a gas detector can be carried out by first calibrating the instrument with a zero gas and a standard gas. The instrument will store the obtained standard curve. When the gas detector is working in the tested environment, the instrument will compare the signal generated by the detected concentration of the tested gas with the standard curve stored during calibration, and then calculate the concentration value of the tested gas
Calibrating the instrument at any time and regularly calibrating the instrument is a safe way to ensure accurate measurement. It should be noted that although many gas detectors currently have replaceable detection sensors, this does not mean that a detector can be equipped with different detector probes at any time. Whenever replacing the probe, in addition to requiring a certain sensor activation time, the gas detector must also be recalibrated. In addition, it is recommended to perform corresponding testing on the standard gas used in various instruments before use to ensure that the gas detector truly plays a protective role.
If this type of instrument is used as a safety alarm in an open environment, such as an open workshop, 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.
Calibration is generally a simple and convenient process that only requires two steps:
1, Zero the instrument in "air" that does not contain the gas to be measured.
2, Place the instrument in a standard gas containing a known concentration for calibration.
For those in the security industry, portable detectors must be accurate, reliable, and not allow for any carelessness. And the correct and regular calibration and maintenance of the testing instrument is the * method, which shows how important calibration is.
In fact, both detector manufacturers and national regulations have calibration requirements, which are usually divided into two categories: equipment manufacturers require regular calibration, usually once every 2-6 months, to ensure that the instrument can work properly and effectively. Manufacturers recommend that qualified users, distributors, or authorized service personnel of the manufacturer can perform instrument calibration work. The metrology regulations require that the number of calibrations must not be less than once every 12 months, and this calibration must be conducted by a nationally designated metrology department, which means it needs to be calibrated by a third-party metrology institute.
