Gas detector calibration and calibration how to do
Under normal circumstances, gas detectors need to be calibrated once a year, and even those with stricter accuracy requirements will be calibrated every six months or every 3 months. The more times the calibration is performed, the less likely the detector will drift and the better the detection effect will be.
For the calibration of the gas detector, you can first calibrate the instrument with a zero gas and a standard gas, and the instrument will store the obtained standard curve. When the gas detector works in the measured environment, the instrument will detect the detected gas. 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 by calculation
Zero calibration of the instrument at any time, and regular calibration of the instrument are the only tasks to ensure the accurate measurement of the instrument. It should be noted that although many gas detectors can replace the detection sensor at present, this does not mean that a detector can be equipped with different detector probes at any time. Whenever a probe is replaced, the gas detector must be re-calibrated in addition to a certain sensor activation time. In addition, it is recommended to perform corresponding detection on the standard gas used in the instrument before various instruments are used to ensure that the gas detector really 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 diffusion gas detector that you wear, 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, which only requires two steps:
1. Zero the instrument in "air" that does not contain the gas to be tested.
Second, place the instrument in a standard gas containing a known concentration for calibration.
For small partners in the security industry, portable detectors must be accurate and reliable, and there is no room for sloppiness. Correct and regular calibration and maintenance of the detector is the only method, which shows how important calibration is.
In fact, both the tester manufacturer and the national regulations also have provisions on calibration, which are usually divided into two categories: equipment manufacturers will require regular calibration, usually once within 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 calibrate the instrument. Metrology regulations require that the number of calibrations should not be less than once every 12 months, and this calibration must be carried out in the measurement department specified by the state, that is to say, it needs to be calibrated in a third-party measurement institute.
