Analysis of common faults in fixed gas detectors
With the rapid development of industry, there are more and more places where humans come into contact with harmful gases, resulting in greater harm to humanity itself. The repeated poisoning accidents have made people realize the importance of protecting human safety while developing industry. Therefore, alarms and detectors have gradually become protective equipment in industrial safety production.
Fixed gas detector is a common type of gas detector, mainly composed of a controller and a gas detector. Proper installation of these two parts is necessary to ensure their normal operation.
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 to follow standard construction requirements by users, and insufficient maintenance and upkeep. The following mainly analyzes the causes of malfunctions in the use of combustible gas detectors by users, and proposes how to use combustible gas detectors correctly to minimize the occurrence of gas alarm failures.
1, Improper use by users
During the use of gas detectors by gas alarm users, the air conditioning and heating equipment should be installed close to the combustible gas detector. If the cold and warm air flow directly blows through the combustible gas alarm during the use of the air conditioning and heating equipment, it may cause changes in the resistivity of the combustible gas alarm, resulting in errors. Therefore, the combustible gas alarm should be kept away from the air conditioning and heating equipment to avoid malfunctions caused by improper positioning.
2, The construction process is not standardized
Improper construction processes can cause combustible gas detectors to malfunction during use. If the combustible gas detector is not located near the equipment that is prone to combustible gas leakage, or is installed adjacent to the exhaust fan, the leaked combustible gas cannot fully diffuse to the vicinity of the combustible gas detector, thus preventing the leakage risk from being detected by the combustible gas detector in a timely manner.
If the combustible gas detector is not grounded, it will not be able to eliminate electromagnetic interference and will inevitably affect the voltage, resulting in inaccurate detection data faults. Therefore, the combustible gas detector should be reliably grounded during the construction process. The combustible gas alarm and wiring terminals are located in areas that are 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, affecting 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.
3, 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 objectively exists. The working environment of combustible gas detectors is relatively harsh, and many are installed outdoors. Poor maintenance and upkeep will lead to errors or failure to detect combustible gas alarms.
Regular cleaning and maintenance of combustible gas detectors is an important task to prevent malfunctions. Grounding should be regularly tested. If the grounding does not meet the standard requirements or is not grounded at all, it can also make the combustible gas detector susceptible to electromagnetic interference and cause malfunctions.
A fixed gas detector is a new type of intelligent industrial gas analysis developed using the principles of electrochemical or magnetic oxygen detection, imported electrochemical or magnetic oxygen sensors combined with new microcontroller technology. Different types of sensors are selected according to different usage requirements.
