Cause analysis and solution of false alarm of the

2022-08-08
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Cause analysis and solution of false alarm of smoke detector

the main causes of false alarm are as follows: 1. Cooking 2. When powered on, the alarm will sound continuously 3. Intermittent alarm sound 4. Influence of steam or moisture 5. Smoke from cigarettes 6. Poor power contact

many false alarms of cooking smoke are generated by ion alarms. Because this kind of sensor is sensitive to very small smoke particles, even particles that cannot be seen by human eyes. The smoke particles produced by high cooking temperature are invisible to human eyes

there are two basic solutions: either move the position of the alarm or change to another alarm that is not sensitive to cooking smoke. If the alarm is installed far away from the cooking place, the smoke generated by cooking will become very thin when it reaches the alarm, so as to reduce false alarms. However, this method may not always work, especially when the air flow brings cooking smoke to the alarm. So when moving the alarm, be sure to make clear the air flow direction first

the second solution is to replace the alarm. There are three options. One is to buy a new ion alarm with mute button. As long as you press the button, the alarm will stop for 15 minutes, so there is enough time to let the cooking smoke spread out. The second option is to buy a photoelectric smoke detector. The cost of installing a battery based photoelectric alarm is no more than $20. Photoelectric alarm is not sensitive to tiny smoke particles, so it will not produce false alarm to smoke particles generated by cooking. Even if this makes the response of the photoelectric alarm to the fire (the fire produces more small particles) slower, the time difference is very small

the third option is a common device with two sensors. The ion sensor is used in combination with the photoelectric sensor, and the manufacturer makes the ions less sensitive to the smoke particles generated by cooking. In this way, the owner has the common advantages of the two sensors, while reducing false positives

if the alarm keeps sounding, it may be that too much dust has accumulated in the alarm or the alarm has been used for too long, or it may be that the alarm is out of order. If the sensor in the alarm is used for too long, and it will emit an unpleasant smell when heated, it will become sensitive to smoke. The alarm will also sound when there is not much smoke. All household alarms should be replaced after ten years of use. Maybe the alarm you bought is very expensive, but even the new alarm may be faulty. If a newly purchased alarm keeps sounding 1 Type and technical status of cement pressure testing machine the development sound of cement pressure testing machine and other various material testing machines should be replaced with a new alarm

what's the matter with intermittent alarm if there is no fire? If this happens, it may also be that the alarm becomes sensitive because it has been used for too long. Or there is too much dust inside, or there may be something wrong with the alarm. But sometimes, when the battery is about to run out, it will chirp every minute. Some people also think that this is a false alarm

but this kind of sound is very different, because it makes a single, short sound, and it makes such a sound about every minute. If your alarm sounds intermittently, you can replace the battery to see if it can solve the problem. If not, then it is time to consider replacing the alarm or cleaning it. When cleaning the alarm, clean all the small openings near the end of the vacuum cleaner one by one. In this way, the dust accumulated on the cover of the alarm can be completely removed. If the dust still cannot be removed, it must be replaced

steam or moisture will be concentrated on the sensor and circuit board. If too much water vapor is concentrated, an alarm will sound. The problem can be solved by installing the alarm device at a place far away from steam and moisture, such as the corridor of the bathroom. However, if the alarm would have worked properly, but now it reacts to steam or moisture, the problem may be the cause of the aging of the alarm. Older alarms become more sensitive and more responsive to steam and moisture. Therefore, the occurrence of false alarm may also be that the alarm has exceeded its service life and needs to be replaced

generally, the smoke detector will not respond to the smoke of cigarettes unless the smoke is very thick. For example, many smokers smoke in the same room may cause an alarm. If they stand close to the alarm device and blow to it, it will respond, but not always. If the alarm is too old, it will respond even if the smoke concentration is very low. On the contrary, we can also judge whether the alarm has aged

there is no practical way to repair the poor contact of the battery compared with the current frequently used materials. This may occur because the alarm is too old or the battery is replaced, but it is also a high temperature control precision signal to replace the alarm device. (end)

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