Precautions for using combustible gas detector

1. Pay attention to regular calibration and testing

gas detectorLike other analytical and testing instruments, the relative comparison method is used for measurement: the instrument is first calibrated with zero gas and standard concentration gas, and the standard curve is stored in the instrument. During the measurement process, the electrical signal generated by the measured gas concentration is compared with the electrical signal of the standard concentration to calculate the accurate gas concentration value. Therefore, the instrument should be calibrated at any time and regularly calibrated.

It should be noted that many gas detectors can currently replace detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time. Every time the probe is changed, in addition to the sensor time, the instrument also needs to be recalibrated. In addition, it is recommended to perform response testing on the standard gases used in various instruments before using them, in order to protect the instruments.

2. Pay attention to simultaneous interpretation and interference detection between different sensors.

Generally speaking, each sensor corresponds to a specific gas being detected, but anygas detectorNone of them can be specific. Therefore, when choosing a gas sensor, it is important to understand the interference of other gases on the sensor in order to accurately detect specific gases.

3. Pay attention to the service life of various sensors

All kinds of gas sensors have a service life, that is, a service life. Generally speaking, in portable instruments, LEL sensors have a long lifespan and can be used for about 3 years; The lifespan of the photoionization detector is over 4 years; Electrochemical gas sensors have a shorter lifespan, generally within 1 to 2 years; The lifespan of oxygen sensors is short, about 1 year. The service life of electrochemical sensors depends on the dryness of the electrolyte. If they are not used for a long time, they can be sealed in a low-temperature environment to extend their service life. Due to the large volume of fixed instruments, the service life of sensors is relatively long. Therefore, it is necessary to constantly detect sensors and use them as much as possible within the sensor period. Once a malfunction occurs, it should be replaced promptly.

4. Pay attention to the concentration measurement range of the detector

All kinds of gas detectors have a fixed detection range. Only when the measurement is completed within the measurement range can the instrument accurately measure. However, if the measurement range is exceeded for a long time, the sensor maylong-termDamaged.