Maintenance Specifications and Working Principles of Gas Detectors
The maintenance standards for gas detectors include the following points:
1. Regularly inspect, calibrate, and perform impact testing on the detector.
2. Maintain operational records of all testing, calibration, and alarm events.
3. Keep the surface of the instrument dry and clean, away from moisture, rainwater, and corrosive gases and liquids.
4. Stay away from dust and keep the surrounding environment clean.
5. The ambient temperature should be moderate and not too high or too low to prevent affecting electronic components.
6. Do not strike, shake or drop the instrument violently, and do not use it roughly.
7. Stimulating chemicals, detergents, or cleaning agents with high concentrations are also prohibited. It is feasible to use a soft cotton cloth dipped in a small amount of water to gently wipe the instrument, and it should be wiped dry in a timely manner.
8. The instrument detection hole should be wiped regularly to keep the hole pipeline unobstructed and prevent liquid from flowing into the detection hole. Once the liquid flows in, it should be placed downward to allow the liquid to flow out on its own.
9. For the phenomenon of air leakage in the pneumatic system, check whether the diaphragm of the vacuum pump is damaged, and at the same time, check whether the sealing ring is broken, and whether the condensate and four-way valve are damaged.
10. The combustible gas alarm indicates the need to replace the filter paper, stop the suction pump, and filter out the drainage inside the tank.
11. Pay attention to the detection interference between different sensors.
12. Pay attention to the lifespan of various sensors, and the lifespan of electrochemical specific gas sensors is generally one to two years; The lifespan of the photoionization detector is four years or longer; The lifespan of LEL sensors is generally around three years; The lifespan of oxygen sensors is approximately one year. Low temperature storage can extend its service life to a certain extent.
13. The flow rate of gas detection is usually 30/h, and it cannot deviate too much or too little from this value, otherwise it will affect the results.
Pay attention to the concentration measurement range of the testing instrument: Only by completing the measurement within its measuring range can the instrument ensure accurate measurement.
