User guide

SYSTEM APPLICATION
The U7698B Unitized Single Frequency Infrared (IR) Fire
Detector/Controller with manual Optical Integrity (o
i
) is a
completely unitized fire detection device that incorpo-
rates all detection, signal processing, and switching
components in a single enclosure. The U7698B pro-
vides reliable fire protection in areas that can present
problems for other types of optical detectors. Typical
applications for the U7698B include areas where:
— Harsh salt water conditions exist.
—Arc welding is common.
—A high concentration of ultraviolet attenuating
vapors is present.
— Smoke can precede flames.
— Oil film or dust particles can accumulate on the
detector viewing window.
The U7698B is ideally suited for:
— Oil rigs
— Refineries
—Transport loading facilities.
FEATURES
• Detector and controller are housed in a single unit.
• Reduces the risk of false alarms caused by arc weld-
ing and lightning.
• Solar blind.
• Fire output relay is field programmable for latching or
non-latching operation.
• LEDs provide visual indication of alarm condition.
• Manual o
i
feature provides convenient means of test-
ing detector operation.
• Fault relay responds to problems such as a loss of
input power.
• Operates under adverse weather conditions.
• Choice of aluminum or stainless steel enclosure.
• Adjustable mounting bracket for ease of installation.
•Designed to meet Canadian Standards Association
(CSA) and CENELEC explosion-proof requirements.
DESCRIPTION
The U7698B Detector/Controller contains high quality
electronic sensing and switching components in an
explosion-proof enclosure. Through the use of optical fil-
ters and signal processing circuitry, the U7698B pro-
vides reliable response to the presence of a flame and is
insensitive to signals from arc welding, lightning, and
sunlight, making it suitable for a variety of indoor and
outdoor applications.
FLAME DETECTION
Every fire has characteristics or elements that distin-
guish it as a fire such as heat, smoke, visible light, ultra-
violet (UV) and infrared (IR) radiation, and flame flicker.
INSTRUCTIONS
Unitized Single Frequency
Infrared Fire Detector/Controller
U7698B
©Detector Electronics Corporation 2003 7/03 95-8353-05
*o
i
is Detector Electronics' Trademark for its patented Optical
Integrity Systems, U.S. Patent 3,952,196, United Kingdom Patent
1,534,969, Canada Patent 1,059,598.
DET-TRONICS
®