Conventional Fire Alarms Smoke Detectors 500 Series The 511C continually monitors its own sensitivity and operational status, and provides a visual indication if it drifts out of the sensitivity range or fails internal diagnostics. Drift compensation allows the detector to automatically adjust its sensitivity over time as it becomes dirty, increasing the time between cleaning, and the life of the detector. The patented field replaceable optical chamber simplifies cleaning. Features and Specifications • uilt-in drift compensation B • Field-replaceable optical chamber • Small, low-profile design • White color • eets NFPA 72 field sensitivity testing without M the need for external meters • Includes mounting base • perating temperature range: 32°F to 100°F O (0°C to 37.8°C) The Edwards 511C is a conventional photoelectric, direct-wire smoke detector with drift compensation, and features a low profile and self-diagnostics. This two-wire detector meets NFPA 72 field sensitivity requirements without the need for external meters. Normal sensing occurs every 9 seconds. This rate doubles when a signal exceeding the alarm threshold value is sensed. Two additional successive signals above the threshold level will initiate an alarm. Ordering Information Description Operating Voltage Current (Standby) Current (Alarm) Photoelectric Sensitivity Reset Time Field Wire Size Two-wire Conventional Smoke Detector Accessories Description Replacement optical Chambers (pkg. of 10) Weights and Dimensions Dimensions Approx. Shipping Weight (lb.)