Calibration and adjustment of gas detection instruments
Under normal circumstances, gas detectors need to be calibrated once a year. Those with strict accuracy requirements may even be calibrated every six months or every three months. The more times it is calibrated, the less likely the detector is to drift and the better the detection effect will be.
To calibrate the gas detector, you can first calibrate 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 detect the The signal generated by the measured gas concentration is compared with the standard curve stored during calibration, and then the concentration value of the measured gas is obtained through calculation.
Zeroing the instrument at any time and calibrating the instrument frequently are the most important tasks to ensure accurate measurement of the instrument. It should be noted that although many current gas detectors can replace the 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 the required sensor activation time, the gas detector must be recalibrated. In addition, it is recommended that the standard gas used in the instrument be tested accordingly before use of various instruments 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 place, such as an open workshop, you can use a body-worn diffusion gas detector because it can continuously, real-time and accurately display the concentration of toxic and harmful gases on site.
Generally, calibration is a very simple and convenient process, requiring only two steps:
1. Reset the instrument to zero 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 and reliable, and there is no room for sloppiness. Correctly and regularly calibrating and maintaining the detector is the only way, which shows how important calibration is.
In fact, both detector manufacturers and national regulations also have calibration regulations, which are usually divided into two categories: equipment manufacturers will require regular calibration, usually once every 2-6 months, to ensure that the instrument can work normally and effectively. , the manufacturer recommends that qualified users, dealers or service personnel authorized by the manufacturer can perform instrument calibration. Measurement regulations require that the number of calibrations must be no less than once every 12 months, and this calibration must be conducted at a state-specified metrology department, which means it needs to be calibrated at a third-party metrology institute.
