Analysis of false alarms and solutions

Home security system setting, operation troubleshooting. Help installing wireless wired home security system.
Jim
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Joined: Sat Oct 31, 2020 1:01 pm

Analysis of false alarms and solutions

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1. False alarms caused by improper design and installation of the alarm system
Equipment installation location, installation angle, protective measures, system wiring, etc.
1). When the passive infrared intrusion detector is installed against the air conditioner and the ventilation fan, it will cause the system to false alarm
2). If the active infrared detectors used outdoors are not protected by proper shading (the ones with sunshields should also be protected), it will inevitably cause the false alarm of the system.
3). When the distance between the alarm line and the power line, lighting line and other strong current lines is less than 1.5m, no anti-electromagnetic interference measures are added
2. False alarms caused by improper use by users
Improper use by users often causes false alarms in the alarm system.
For example: windows equipped with magnetic switches are not plugged in, and they are blown open at night; staff mistakenly enter the guard zone; accidentally triggered the emergency alarm device; system check-in staff misuse; not paying attention to changes in working procedures, etc. The cause of the false alarm of the system. Analyzing improper use by users, clarifying the errors and improving the level of users can greatly reduce the number of false alarms of the alarm system.
3. False alarms caused by environmental noise
For example, hot air currents cause false alarms of passive infrared intrusion detectors; high-frequency sound causes false alarms of single-technology glass break detectors; ultrasonic sources cause false alarms of ultrasonic detectors, etc. A more effective measure to reduce such false alarms is to use double-check detectors (the detectors with two different principles detect the "target" at the same time, and the alarm will send out an alarm signal). The current products include: microwave-passive infrared dual discriminator, voice control-vibration glass breaking dual discriminator, ultrasonic-passive infrared dual discriminator, etc. However, some environmental noise dual-detection detectors are powerless, such as: rats appearing in the prevention area; pets walking around in the living room, etc.
Guide and supplier for fire alarm systems.
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