We all know that for guaranteesgas detectorFor accurate measurements, users must calibrate the instrument regularly, but how long is the calibration interval? If the interval is too short, too much manpower and material resources will be wasted, affecting the service life of the instrument. However, if the interval is too long, the error of the instrument cannot be detected in time, and the test results are not accurate. How often should users calibrategas detector？
The core component of the gas detector is the gas sensor, many sensors lose 5% of the sensitivity per year in normal use, and the sensitivity loss will be more obvious if used for more than two years. So this sensor can be used for up to two years.
So how should we check the sensitivity of the sensor? The most straightforward approach is to place it in a target gas with a known concentration and then compare the sensor readings with the gas concentration. It is best to test it once a day before use. If the reading is between 90% and 120% of the expected range, calibration is not requiredgas detector。 For example, for a carbon monoxidegas detector at a concentration of 100 ppm, calibration is only required if the sensor reads between 90 and 120 ppm.
1. If it is not allowed to check the sensor every day, it is recommended to do a daily accuracy check. New sensors should be exposed to a variety of environments, even if they are not suitable for such environments. After 10 days of use, they should be detected daily in the atmosphere.
2. If the test result is within the normal range, but caution is still required, and the test is repeated after a period of time, it is recommended to test again within 30 days.
3. If the calibration interval is more than 10 years, the sensor should be replaced as soon as possible within the shelf life of the sensor to reduce the risk of failure during the inspection interval.
4. Save the running record of all test, calibration and alarm events.
5. If there is a change in operation and environment, it should be re-checked.