Analysis of Common Problems and Troubleshooting Methods for Combustible Gas Detectors
From the experience of working in the gas detector industry, there are always some issues that first-time gas alarm users do not fully understand during the use process. In the analysis of common faults of combustible gas detectors, there are also many examples of combustible gas alarm faults caused by improper use by users. This article focuses on the common problems of point type gas detectors, which lead to the problem of users using gas detection alarm devices.
The common faults of fixed gas detectors are mainly caused by improper use by users, lack of understanding of detector performance, improper equipment selection, failure of users to construct according to standard requirements, and insufficient maintenance. The following mainly analyzes the reasons for the malfunction of combustible gas detectors used by users, and proposes how to use combustible gas detectors correctly to minimize the occurrence of gas alarm failures.
Firstly, improper use by users
During the use of gas detectors by gas alarm users, air conditioning and heating equipment should be installed close to the combustible gas detector. When using air conditioning and heating equipment, if the cold and warm air flow directly blows through the combustible gas alarm, it may cause errors in the resistivity of the platinum wire of the combustible gas alarm. Therefore, the combustible gas alarm should be kept away from the air conditioning and heating equipment, Avoid malfunctions caused by improper positioning. Users should also pay attention to preventing electromagnetic interference during the use of combustible gas detectors. The installation position, installation angle, protective measures, and system wiring of the combustible gas alarm should be protected from electromagnetic interference. There are three main ways in which electromagnetic environment affects combustible gas alarms: airborne electromagnetic wave interference, narrow pulse groups on power and other input and output lines, and human static electricity.
Secondly, the construction process is not standardized.
Non standardized construction processes can cause combustible gas detectors to detect faults during use. If the combustible gas detector is not located near the equipment where the combustible gas is easy to leak, or is installed adjacent to the Whole-house fan, the leaked combustible gas cannot be fully diffused near the combustible gas detector, so that the leakage danger cannot be detected by the combustible gas detector in time. For combustible gas detectors in residential areas, they should be installed near gas pipelines and stoves in the kitchen. When the household is using natural gas, the gas detector should be installed on the ceiling within 300mm of the ceiling; When households 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 cause inaccurate detection data. Therefore, the combustible gas detector should be reliably grounded during the construction process. The combustible gas alarm and wiring terminals are located in areas prone to collision or water ingress, causing open or short circuits in electrical circuits. Welding must use non corrosive flux, otherwise the corrosion at the joint will detach or increase the line resistance, which will affect normal detection. Do not drop or throw the detector onto the ground. After construction, debugging should be carried out to ensure that the combustible gas alarm is in normal working condition.
Thirdly, maintenance and upkeep
To detect the concentration of combustible gases, a combustible gas detector must communicate with the detection environment. Therefore, it is inevitable that various polluting gases and dust in the environment enter the detector, and the damage caused to the working conditions of the detector is objective. The working environment of combustible gas detectors is relatively harsh, and many are installed outdoors, Poor maintenance and upkeep will result in errors or failure to detect combustible gas alarms. Therefore, regular cleaning and maintenance of combustible gas detectors is an important task to prevent malfunctions. Grounding should be regularly tested. Failure to meet standard requirements or not being grounded at all can also make combustible gas detectors susceptible to electromagnetic interference and cause malfunctions. Prevent aging of components. From the perspective of reliability, it has also been proven in practice that systems with combustible gas detectors that have been in service for more than 10 years tend to experience an increase in faults caused by component aging. Therefore, if the service life exceeds the specified requirements, they should be replaced in a timely manner.
