To view an alarm that utilizes both sensor types, click hereĪny of the following situations can cause a false alarm from your smoke detector: First Alert® safety products offer full lines of Photoelectric, Ionization and Combination Smoke Alarms. For maximum protection, use both types of technology on each level and in every bedroom of your home. Sources of these fires may include cigarettes burning in couches or bedding. Photoelectric Sensor Technology - Smoke Alarms using photoelectric sensor technology are generally more sensitive than ionization technology at sensing large smoke particles, which tend to be produced in greater amounts by smoldering fires, which may smolder for hours before bursting into flame. Sources of these fires may include paper burning in a wastebasket, or a grease fire in the kitchen. Ionization Sensor Technology - Smoke Alarms using ionization sensor technology are generally more sensitive than photoelectric technology smoke detectors at sensing small particles, which tend to be produced in greater amounts by hot, flaming fires, that are consuming combustible materials rapidly and may spread quickly. Smoke particles of a varying number and size are produced in all fires. There are generally two types of smoke detectors - ionization smoke detectors and photoelectric type smoke detectors. The green power LED will start to blink indicating the ONELINK® detector is waiting for program data from one of the other existing ONELINK® alarms that are already set up. Once you hear the unit chirp, release the test button. Press and hold the test button and then close the battery drawer. Insert the batteries into the battery drawer of the next detector. Simply open the battery drawer of the second detector and repeat steps 1 through 3. If more than two minutes pass, the green power LED will stop blinking. ADDING AND LINKING ADDITIONAL ONELINK® ALARMS NOTE: To create your integrated smoke detector system, steps 1 through 3 below need to be completed within two minutes. Alarm Will Say: " location saved." If no location is chosen: "No location saved." Your Alarm has now been programmed for the location of your choice. After you hear the location of where you are placing the Alarm, Press & Hold the Test Button. Alarm will say: "To save location, press and hold test button after location is heard." The ONELINK® smoke detector will speak list of locations. Press & Hold Test Button if you would like to program the location or change the location of the alarm. The ONELINK® detector will then say "To select location, press and hold test button now." 2. Alarm will say: "Welcome, First Alert® Smoke Alarm." It will then say "No location programmed" if this is the first time the device has been activated, or " location programmed" when changing batteries. Given those stats, it’s easy to see why Keenan told us that “resident behavior is the biggest challenge we face with smoke alarms.” This is also the reason the International Association of Fire Fighters, the largest firefighter union in the world, supports legislation (PDF) making photoelectric alarms a mandatory requirement for fire and building codes.It is important to follow these steps carefully when programming your First Alert® ONELINK® smoke detectors. A study of smoke alarms in rural Alaskan homes found an “8-fold higher incidence of nuisance alarms in homes with ionization alarms.” In addition, the same study found that, due to nuisance alarms, “ionization smoke alarms were almost 5 times more likely to be disconnected 6 months after installation compared with photoelectric alarms.” A 1995 Texas A&M study (PDF) that took into account disabled alarms concluded that “the probability of a fatality due to the failure of the ionization detector to detect a flame ignition fire is 19.8%.” With photoelectric detectors, that number dropped to 3.99%. Research backs Keenan up on the problem of disabled alarms.
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