Analysis and Countermeasures of Malfunctions in the Use of Combustible Gas Detectors by Users
(1) Improper use by the user
During the use of the detector, the user should install the air conditioner and heating equipment near the combustible gas detector. If the cold and warm air flows directly through the combustible gas alarm during the use of the air conditioner and heating equipment, it may cause errors in the resistance of the platinum wire of the combustible gas alarm. Therefore, the combustible gas alarm should be kept away from the air conditioner and heating equipment to avoid faults caused by improper placement. Users should also pay attention to preventing electromagnetic interference when using combustible gas detectors. The installation position, installation angle, protective measures, and system wiring of combustible gas alarms should be designed to prevent electromagnetic interference. There are three main ways in which the electromagnetic environment affects combustible gas detectors: airborne electromagnetic wave interference, narrow pulse groups on power and other input/output lines, and human static electricity. For example, when a combustible gas alarm is installed near an air conditioner, it will cause a deviation in the system's detection; The distance between the detection line and strong electrical lines such as power lines and lighting lines is small, and without anti electromagnetic interference measures, the system will also produce detection deviation. Users should pay attention to factors that may cause malfunctions during the use of combustible gas detectors, such as dust, high temperature, humidity, rain, etc. When installing a combustible gas alarm in a location that requires the installation of an exhaust fan, if the exhaust fan is placed adjacent to the combustible gas detector, the leaked combustible gas will not be able to fully diffuse to the vicinity of the combustible gas alarm, resulting in the inability to detect in a timely manner and causing a missed opportunity. In addition, users should also pay attention to the setting of combustible gas detectors in explosion-proof places. For example, Class A factories that emit combustible gases should use explosion-proof combustible gas alarms, and their explosion-proof level should not be lower than the corresponding explosion-proof level requirements of current regulations. Users should also pay attention to avoiding places with high temperature, high humidity, steam, and oil fumes when using combustible gas detectors. Do not place or hang items on the detector. The installed combustible gas detector cannot be moved arbitrarily.
(2) The construction process is not standardized
The non-standard construction process may cause the combustible gas detector to malfunction during use. If the combustible gas detector is not located near the equipment that is prone to leaking combustible gas, or is installed adjacent to the exhaust fan, the leaked combustible gas cannot fully diffuse to the vicinity of the combustible gas detector, thus making it difficult for the leakage hazard to be detected by the combustible gas detector in a timely manner. For residential combustible gas detectors, they should be installed near the gas pipeline and stove in the kitchen. When residents use natural gas, the gas detector should be installed within 300mm of the ceiling; When residents use liquefied petroleum gas, gas detectors should be installed within 300mm of the ground. If the combustible gas detector is not reliably grounded and cannot eliminate electromagnetic interference, it will inevitably affect the voltage and result in inaccurate detection data. Therefore, the combustible gas detector should be reliably grounded during the construction process. The combustible gas detector and wiring terminals are located in areas that are prone to collision or water ingress, causing electrical circuit breaks or short circuits. Non corrosive soldering flux must be used for welding, otherwise the joint will corrode and detach or increase the line resistance, affecting normal detection. Do not drop or throw the detector to the ground.
