Brand Information
Discovery Marine analogue addressable fire detectors are suitable for larger vessels. The high specification range has been developed to meet the requirements of sophisticated systems. Discovery gives you total reassurance in installations where it is necessary to adapt detection to different operating environments and where protection against unwanted alarms is paramount.
Brand Features
Approved for use in the marine environment
Five response modes for environmental adaptation
Day/night switching for increased flexibility
Drift compensation for false alarm reduction
User programmability for data
XPERT card addressing for increased security
Operation
The Discovery Marine Heat Detector uses a single thermistor to sense the air temperature at the detector position. The thermistor is connected in a resistor network, which produces a voltage output dependent on temperature. The design of the resistor network, together with the processing algorithm in the microcontroller, gives an approximately linear characteristic from 10�C to 80�C. This linearised signal is further processed, depending on the response mode selected, and converted to an analogue output.
Device Addressing
For the European standard version of the detector, the five modes correspond to five classes" as defined in EN54-5:2001. The classes in this standard correspond with different response behaviour, each of which is designed to be suitable for a range of application temperatures. All modes incorporate "fixed temperature" response, which is defined in the standard by the "static response temperature".
