false alarm

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false alarm

[¦fȯls ə′lärm]
(electronics)
In radar, an indication of a detected target even though one does not exist, due to noise or interference levels exceeding the set threshold of detection.
References in periodicals archive ?
The bulk of nuisance alarms are caused by students and employees who prop open doors or gates in residence areas to allow friends or coworkers into buildings.
Electromagnetic disturbances such as lightning, or any metallic object, can signal a false or nuisance alarm.
Your training should include a list of do's and don'ts, which can go a long way toward eliminating false and nuisance alarms.
When properly installed and maintained, the taut wire sensor incorporates a high probability of detection and a low nuisance alarm rate.
Poorly attached contacts, loose doors, and rattling windows are frequent causes of nuisance alarms.
Alarm Tender enables an individual to slide a smoke alarm (not included) mounted to it within reach for tasks such as silencing nuisance alarms, changing the battery, cleaning, performing fire drills, etc.
Chose a location that is away from windows and ducts where drafts may interfere and also keep away from bathroom steam and cooking vapors which can cause nuisance alarms.
Made by Kouba Systems of Bastrop, Texas, its tailgate detection system allows roller luggage, briefcases, and other large packages to pass without causing nuisance alarms.
After the hearing, Mr McCabe said: "For the disturbance caused by two or three nuisance alarms, it is not worth disabling them.
The NIV mode is an adaptation of pressure support ventilation designed to compensate leaks and to minimize leak-related nuisance alarms.
5V operating range, output Enable control input, thermal protection, under voltage lock-out, low quiescent current and fault masking, which prevents nuisance alarms on current surges or hot plug events.
Notifier, a manufacturer of commercial fire alarm technology and systems and part of Honeywell's Life Safety Group, offers Onyx Intelligent Sensing, Designed to increase speed and accuracy of response, Onyx Intelligent Sensing delivers rapid, intelligent response to incipient fire conditions while reducing nuisance alarms caused by dust, moisture, or spurious smoke.