Det-Tronics S3 Graphics - Manual (Page 163)

12-48 EAGLE QUANTUM PREMIER DEVICES
Version 6.0
EAGLE QUANTUM PREMIER DEVICES
The UV flame detector output (measured in counts per second) is compared to the fire threshold (the”sensitivity”
setting). If the radiant energy level from the fire exceeds the selected alarm threshold level, the fire alarm output
is activated. In every application, it is crucial to ensure that the radiant ultraviolet energy level from the expected
fire at the required distance from the detector will exceed the selected sensitivity level. The UV flame detector
can be programmed for “Arc Rejection” or “Standard Signal Processing”.
Arc Rejection (Recommended Factory Setting)
The Arc Rejection mode enables the detector to prevent nuisance fire alarms caused by UV from short-duration
electrical arcs or electrostatic discharge, while maintaining the ability to reliably detect the UV given off by a flame.
Typical applications that benefit from arc rejection logic include electrostatic coating processes and uncontrolled
environments where transient UV sources can be present, such as many typical outdoor applications. Most false
alarm sources have short transient UV signatures, while fire creates a long UV signature over many seconds.
Most fires are detected in a few seconds.
Standard Signal Processing
Standard signal processing is recommended for high speed suppression systems only. To allow for high speed
operation, the standard processing mode does not incorporate the arc rejection programming. This mode should
only be used in a controlled, indoor environment.
EQ2200UV • CONFIGURATION