Rauchmelder

JST-B008 Independent Ceiling smoke sensor The following is some important technical parameters of theionicindependent Smoke alarm:(the shellcan change according to your require). Working Voltage DC12V, 220VQuiescent Current ≤10uAAlarm Current ≤20mAWorking Temperature 40F—120FAmbient Humidity ≤95%RHInstallation CeilingIndicator Light glitter every 10 secondsvolume 85dbSensor infrared phototube Sensitivity (GB4715-93) 4.22Fire Sensitivity Test Standard Photoelectric technology is generally more sensitive than ionization technology at detecting large 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 cigarettes. The unit monitors the air, and when smoke reaches its sensing chamber, it alarms. It can give you more time to escape before fire spreads. This unit can only give an early warning of developing fires if it is installed, maintained and located where smoke can reach it, and where all residents can hear it, as described in this manual. This unit will not sense gas, heat, or flame. It cannot prevent or extinguish fires. The alarm shall include a test button that will electronically simulate the presence of smoke and cause the unit to go into alarm. This sequence tests the units electronics, battery and horn to ensure proper operation. The unit shall include a piezoelectric horn that is rated at 85 decibels at 10 feet. In a smoke incident, the horn will sound in the repetitive manner—three beeps , a pause, three beeps , a pause . The unit shall also include a low battery warning utilizing a brief alarm chirp every 30-40 seconds for a minimum of seven days. The alarm will utilize a red LED that shall flash once every 30-40 seconds to indicate the alarm is receiving power. Update Date:2010-11-10 02:49:15