The normal calibration time of the gas detector is not more than one year, and the cycle from product delivery to regular maintenance is one year. It is mainly based on the aging of the gas monitoring probe, and the correction is to avoid the decrease of the sensitivity of the monitoring probe. If the gas detector fails to monitor the gas concentration in time when the gas concentration rises, the sensitivity of the gas detector decreases or the instrument calibration problems occur.
According to the gas detector is used location, frequency of use and the degree of impact on the production process to establish the verification cycle, the verification cycle can be 3 months, 6 months, 12 months. The new sensor should be in contact with various environments, even if it is not suitable for the environment, and it should be used for daily sensor detection in the atmospheric environment after up to ten days.
Calibration of a gas detector means that the detector is placed in a known concentration of the tested gas to compare the accuracy of the detector's detection record. For example, n-hexane will burn and explode at 1.1%VOL, and when the detector sets a 10% alarm, it should alarm when the gas concentration reaches 0.1%, and the difference between the measured gases measured by the re-calibrated detector is generally not more than 10%, that is, it can continue to be used normally without correction.
The calibration of the detector is an important way to restore the detector sensitivity and restore the detector, and we can also determine whether the sensor of the detector is invalid. Therefore, it is necessary to do calibration regularly. It is usually calibrated once every 12 months. The general calibration is a very simple and convenient process, requiring only two steps: first, zero the instrument in the "air" that does not contain the gas to be measured, and second, put the instrument in a standard gas with a known concentration for correction.
Strictly speaking, it is necessary to often calibrate, and some local safety bureaus have strict requirements for the use of gas detectors, some require calibration once a month, some three months, and some a year. Most places do not have strict requirements for the calibration of the detector, you can pay a little attention to yourself when using, often carry out a simple test on the instrument, if you find that the instrument is obviously insensitive, you can send it back to the seller for professional technical judgment and maintenance. The use of good instruments, in the use of more than 3 years, it is best to send back to the seller for identification, to see if the instrument can still achieve the initial detection effect, by professional technical guidance, use suggestions and maintenance.