Introduction to Calibration and Calibration Operations of Gas Detectors
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 three months. The more calibration times, 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 measured environment, the instrument will compare the signal generated by the detected gas concentration with the standard curve stored during calibration, and then calculate the concentration value of the measured gas
Zeroing the instrument at any time and regularly calibrating it are tasks to ensure accurate measurement. It should be noted that although many gas detectors can currently replace detection sensors, this does not mean that a detector can be equipped with different detector probes at any time. Whenever a probe is replaced, in addition to requiring a certain activation time for the sensor, the gas detector must also be recalibrated. In addition, it is recommended to conduct corresponding tests 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 workplace, for example, 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.
Generally, calibration is 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 with a known concentration for calibration.
For security industry partners, portable detectors must be accurate, reliable, and cannot tolerate any carelessness. The most important method is to calibrate and maintain the detector correctly and regularly, which shows how important calibration is.
In fact, both detector manufacturers and national regulations have calibration regulations, 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 normally and effectively. Manufacturers recommend qualified users, distributors, or authorized service personnel from the manufacturer to carry out 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 carried out at the national metrology department, which means it needs to be carried out at a third-party metrology institute.
