Fault Analysis of Combustible Gas Alarm
In short, a combustible gas alarm is a device that detects the lower limit of gas explosion. To ensure its long-term safety, reliability, and efficient operation, sufficient attention must be paid, because the failure of the combustible gas alarm may lead to a large amount of leakage of toxic and combustible gases, not only causing explosion and fire accidents, but also posing a threat to the life safety of employees. So what are the reasons for the malfunction of the combustible gas alarm?
1、 Emphasize the selection of equipment
The sensing element is the heart of an instrument and plays a decisive role in its sensitivity, repeatability, linearity, and lifespan. The response sensitivity of various gases varies on different instruments. Fully considering the cost-effectiveness of the equipment and choosing equipment with stable performance as much as possible will provide reliable assurance for normal operation in the later stage.
2、 Place of use of equipment
1. The impact of natural environment on the performance of equipment placement location
The placement of combustible gas alarms is very complex, and combustible gas alarms are reasonably arranged in pump rooms, tank areas, valve group areas, docks, fuel tanks, heating furnaces, and other locations where gas or fuel may leak. Some combustible gas alarms are located indoors and have relatively good operating conditions, longer lifespan, and lower failure rates. Some combustible gas detectors are installed outdoors, and the detectors operate in outdoor areas all year round. The cold and warm air flow, especially the seawater flow containing salt, directly blows through the combustible gas detector, which may cause errors in the resistivity of the platinum wire of the combustible gas detector. 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 waves on the performance of combustible gas alarms
We should also pay attention to preventing electromagnetic interference when using combustible gas detectors. The installation position, installation angle, protective measures, and system wiring of combustible gas detectors should be protected from electromagnetic interference. There are three main ways in which the electromagnetic environment affects combustible gas detectors:
(1) Airborne electromagnetic interference
For example, there is a certain distance between the combustible gas alarm and the alarm system, which is usually located in the monitoring and dispatching room of the oil transportation station. In our daily detection work, we usually need to use explosion-proof wireless walkie talkies for dialogue. If the distance between the walkie talkie and the combustible gas alarm is too close during the intercom process, the combustible gas alarm cannot function properly.
(2) Narrow pulse group on power supply and other input/output lines
For example, when combustible gas detectors are installed near power equipment, it is easy to cause deviations in the detection of the system; If the distance between the detection line and strong current lines such as power lines and lighting lines is small, and no anti electromagnetic interference measures are taken, the system will also generate detection deviation.
(3) Human static electricity
Human static electricity is also a crucial aspect in the use and detection process. Although the battery level is not high, the instantaneous discharge current value is large, which can affect the internal voltage of the equipment and cause inaccurate detection data.
The reasons for the malfunction of the combustible gas alarm mentioned above are shared here. Various problems encountered during the use of the combustible gas alarm cannot be ignored, as any small problem in our eyes can lead to fatal tragedies. Therefore, when purchasing a combustible gas alarm, it is important to choose a combustible gas alarm manufacturer with comprehensive after-sales service.
