Fault Causes and Solutions of Combustible Gas Detectors
After comprehensively analyzing the fault causes of combustible gas detectors, two possibilities cannot be excluded: non - standard construction processes and inadequate maintenance. Both of these are potential factors leading to malfunctions in combustible gas detectors.
Non - standard construction processes can cause detection failures in combustible gas detectors during use. For example, if a combustible gas detector is not installed near the equipment where combustible gases are likely to leak, or if it is installed adjacent to an exhaust fan, the leaked combustible gases cannot fully diffuse to the vicinity of the detector. As a result, the detector cannot detect the leakage in a timely manner.
In residential buildings, combustible gas detectors should be installed near the gas pipelines and stoves in the kitchen. When natural gas is used, the gas detector should be installed within 300mm from the ceiling. When liquefied petroleum gas is used, the detector should be installed within 300mm from the ground. If a combustible gas detector is not properly grounded, electromagnetic interference cannot be eliminated, which will definitely affect the voltage and cause inaccurate detection data.
Therefore, during the construction of combustible gas detectors, reliable grounding is necessary. If the detector and its terminal blocks are installed in places vulnerable to collisions or water ingress, it may lead to open or short circuits in the electrical wiring. When soldering, non - corrosive flux must be used; otherwise, the joints may corrode and come apart, or the line resistance may increase, affecting normal detection. The detector should not be dropped or thrown on the ground. After the construction is completed, debugging should be carried out to ensure that the combustible gas alarm is in a normal working state.
Maintenance of combustible gas detectors is also very important. Since the working environment of these detectors is often harsh, and many are installed outdoors, they are frequently exposed to various dust and polluted gases. To detect combustible gas information, the detector must be in contact with the detection environment. Therefore, it is inevitable that various polluted gases and dust in the environment will enter the detector, and the resulting damage to the detector's working conditions is an objective reality. If maintenance is neglected, the detection of the combustible gas alarm may be hindered, leading to errors or failure to detect. Therefore, regular cleaning and maintenance of combustible gas detectors is an important measure to prevent malfunctions.
In addition, it should be noted that the grounding should be regularly inspected. If the grounding fails to meet the standard requirements or there is no grounding at all, the combustible gas detector is more likely to be affected by electromagnetic interference, resulting in malfunctions. Attention should also be paid to preventing failures caused by component aging. From a reliability perspective, and as practice has proven, the number of failures caused by component aging in combustible gas detector systems with a service life of more than 10 years tends to increase. Therefore, when the service life of a detector exceeds the specified limit, it should be replaced in a timely manner.
