Fire Alarm Notification Appliance 2
Fire Alarm Notification Appliance 2 : Methods of Notification: The primary function of the notification appliance is to alert persons at risk. Several methods are used and documented in industry specifications published by UL. Alerting methods include: (a) Sound (audible signals); (b) usually around 3200 Hz due to component constraints; (c) 45dB to 120dB A weighted for human hearing (higher decibels, in the 100 to 120dB rage, were common with older fire alarm horns); (d) Light (visible signals); (e) 15 cd to 1000 cd candela output; (f) 1 to 2 flashes per second
No records Found