The common faults of stationary gas detectors are mainly caused by improper use of the user, lack of understanding of the detector performance, improper equipment selection, failure of the user to perform according to the specification, and inadequate maintenance. The following mainly analyzes the cause of the user's failure using a flammable gas detector, and at the same time, it proposes how to properly use flammable gas detectors to minimize the occurrence of gas alarms. First, improper use of combustible gas detector users During the use of gas detectors by gas alarm users, air conditioners and heating equipment are installed close to flammable gas detectors. When air conditioners and heating equipment are used, if the cold and warm gas flows directly through the flammable gas alarm, there will be It may cause errors in the resistivity of the platinum gas alarm of the flammable gas alarm. Therefore, the flammable gas alarm should be far away from the air conditioning and heating equipment to avoid faults caused by improper installation positions. Users should also pay attention to electromagnetic interference during the use of flammable gas detectors. The installation position, installation angle, protective measures and system wiring of flammable gas alarms should be prevented from electromagnetic interference. There are three main ways that the electromagnetic environment affects combustible gas alarms: electromagnetic wave interference in the air, narrow pulse groups on the power supply and other input and output lines, and static electricity on the human body. For example, when a flammable gas alarm is installed near an air conditioner, it will cause the detection of the system to be deviated; the spacing between the detection circuit and power lines, lighting lines and other strong electric circuits is small, and without the protection against electromagnetic interference, the system will also generate detection deviations. . When using flammable gas detectors, users should pay attention to factors that may cause malfunctions , such as dust, high temperature, humidity, and rain. When an exhaust fan needs to be installed in a field where a combustible gas alarm is installed, if the exhaust fan is disposed adjacent to the flammable gas detector , the leaked combustible gas will not be able to fully diffuse into the vicinity of the combustible gas alarm, resulting in the inability to timely detect it. Yi Yi fighter. In addition, users should also pay attention to the setting of flammable gas detectors in explosion-proof places . For example , a Class A factory that emits flammable gas should use explosion-proof flammable gas alarms. Its explosion-proof rating should not be lower than the corresponding explosion-proof rating required by current regulations. Users should also pay attention to the use of flammable gas detectors to avoid high temperatures, high humidity, steam, and soot. Do not place objects or hang objects on the detector. The installed flammable gas detector cannot move the device anywhere. The user uses a combustible gas alarm as much as possible to use a sensor probe replaceable product for ease of use. Second, maintenance Third, the construction process is not standardized
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The flammable gas detector must detect the combustible gas concentration and must communicate the detector with the detection environment. Therefore, it is unavoidable that various pollutant gases and accumulated dust in the environment enter the detector. The damage to the working conditions caused by the detector is Objective existence, flammable gas detector working environment is relatively poor , there are many installed outdoors, poor maintenance will lead to flammable gas alarm detection error or not detected. Therefore, regular cleaning and maintenance of flammable gas detectors is an important task to prevent malfunctions. Grounding should be regularly tested. Grounding cannot meet standard requirements or is not grounded at all. This can also make flammable gas detectors susceptible to electromagnetic interference and cause problems. Prevent component aging. From the reliability considerations, at the same time, practice has also proved that the flammable gas detector service period of more than 10 years of the system caused by component aging tends to increase, so the service period exceeds the use of the requirements, should be promptly replaced.
Non-standard construction procedures can cause flammable gas detectors to detect failures during use. If the flammable gas detector is not located in the vicinity of the flammable gas where the device is liable to leak, or is installed adjacent to the exhaust fan during installation , the leaked combustible gas cannot fully diffuse into the vicinity of the flammable gas detector, so that the leakage danger cannot be ignited in time. Gas detector detection. For residential flammable gas detectors should be installed near the gas pipelines and cooking appliances in the kitchen. When the households use natural gas, the ceiling of the gas detector ceiling is installed within 300mm from the ceiling ; when the resident uses liquefied petroleum gas, gas The detector should be installed within 300mm from the ground . If the flammable gas detector is not grounded reliably, electromagnetic interference cannot be eliminated, and the voltage will certainly be affected, resulting in inaccurate detection data. Therefore, the flammable gas detector should be reliably grounded during construction. Flammable gas alarms and wiring terminals are set up to be vulnerable to collisions or ingress of water, resulting in open circuit or short circuit of electrical appliances. Welding must be done with non-corrosive fluxes, otherwise joints will erode off or increase line resistance, affecting normal detection. Do not drop or drop the detector on the ground. After the completion of construction, commissioning should be carried out to ensure that the combustible gas alarm is in normal operation.