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Why does the combustible gas detector malfunction?
2024-10-12
Gas detectorThe alarm is concise and comprehensive, which is the equipment for detecting the lower limit of gas explosion. But to ensure its long-term safe, reliable and efficient work, we must pay full attention to the problem of instrument failure, because the failure of the combustible gas alarm may lead to a large number of toxic gases and combustible gas leakage, which will not only cause explosion and fire accidents, but also pose a threat to the safety of employees. So what are the causes of the failure of the combustible gas alarm? The following isThe sea has science and technologySome of the experience to share:
1. attention to the selection of equipment
The sensing element is the heart of the instrument, which plays a decisive role in the sensitivity, repeatability, linearity and life of the instrument. The response sensitivity of various gases on different instruments is not the same, fully consider the cost performance of the equipment, and try to choose stable performance equipment will provide a reliable guarantee for the normal operation of the later.
Place of use of 2. equipment
2. The influence of the natural environment of the equipment placement on its performance
The installation place of combustible gas alarm is very complicated. Combustible gas alarm is reasonably arranged in pump room, tank area, valve group area, wharf, fuel oil tank, heating furnace and other positions where gas and fuel oil may leak. Some combustible gas alarm in the room, the use of relatively better conditions, longer life, the failure rate is relatively low.
Some combustible gas alarms are outdoors, and the detectors work in the open air all the year round. The cold and warm air flow, especially the seawater air flow mixed with salt, directly blows through the combustible gas detector, which may cause the resistivity of the platinum wire of the combustible gas detector to change and cause errors. Therefore, the service life of the combustible gas detector is lower than that of the indoor combustible gas alarm, and the failure rate is relatively high.
2. The influence of electromagnetic wave on the performance of combustible gas alarm
We should also pay attention to the use of combustible gas detectors in the process of electromagnetic interference. The installation position, installation angle, protective measures and system wiring of combustible gas detector shall be protected from electromagnetic interference. There are three main ways to influence the electromagnetic environment on the combustible gas detector:(2) Air electromagnetic interference
For example, there is a certain distance between the combustible gas alarm and the alarm system. Usually, the alarm system is placed in the monitoring and dispatching room of the oil transmission station. In the daily detection process, we usually need to use explosion-proof wireless interphone for dialogue. If the distance between the interphone and the combustible gas alarm is too close, the combustible gas alarm cannot work normally. (2) Narrow pulse groups on power supply and other input and output lines
For example, when the combustible gas detector is installed close to the power equipment, it is easy to cause the detection deviation of the system. The distance between the detection line and the power line, lighting line and other strong electric lines is small, and the system will also produce detection deviation without anti-electromagnetic interference measures. (3) Human body static electricity Human body static electricity is also a link that cannot be underestimated in the process of use and detection. Although the electricity quantity is not high, the current value of instantaneous discharge is very large, which can affect the voltage inside the equipment and cause inaccurate detection data.
The above reasons for the failure of the combustible gas alarm are shared here. Various problems in the use of the combustible gas alarm cannot be ignored, because any small problem in our eyes may cause fatal tragedy. Therefore, when buying a combustible gas alarm, be sure to choose a sea manufacturer with perfect after-sales service.
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