Det-Tronics C7051B, C UV Flame Detector - Manual (Page 4)

Solid Materials
— Munitions production such as illuminating flare mate-
rial, TNT, black powder and other propellants
Other Processes
— Chemical and petrochemical production
Information on these and a wide variety of applications is
available from Detector Electronics.
FEATURES
• Automatically compensates for nuclear radiation.
• Detectors operate under adverse weather conditions
such as wind, rain, snow, high humidity, and
extremes of temperature or pressure.
• Automatic Optical Integrity.
• All automatic test functions performed with the sys-
tem on line.
• Manual oi test capability (in addition to Automatic oi
capability).
• Automatic fault identification.
• Individual zone identification.
• Microprocessor control.
• Both fire and fault outputs have redundant indication,
i.e. digital readout and separate LED.
• Output circuits can be made latching or non-latching
through field adjustment.
• Keylock switch for setting the controller mode to
NORMAL, RESET or TEST.
• Power supply will accommodate high direct current
transients such as those associated with battery
charging.
• TEST/ACCEPT button for silencing external audible
signaling devices.
• LAMP TEST button for checking all panel LEDs and
digital display segments while the system is on line.
• Individual detector count rates can be measured and
observed on the digital display.
• Digital display signal output available at field wiring
terminals for coupling to computers or other equip-
ment.
GENERAL APPLICATION
INFORMATION
In applying any type of sensing device as a fire detector,
it is important to know of any conditions that may prevent
the device from responding to a fire, and also to know
what other sources besides fire will cause the device to
respond. A UV detector is useful in fire protection appli-
cations because it will provide very fast response to the
presence of ultraviolet radiation emitted by a flame. In
addition, it is the only type of sensor that is not affected
by environmental conditions such as wind, rain, or
extremes of temperature and pressure. The Det-Tronics
UV system is also insensitive to the ultraviolet component
of solar radiation.
Considering the above, it can be seen that there are fire
detection applications where only ultraviolet sensors are
suitable. However, success in using an ultraviolet detec-
tor is dependent not only on knowing its advantages, but
also its limitations. High atmospheric electrostatic poten-
tial can cause false actuation of an ultraviolet detection
system if its detectors are not correctly grounded.
Electric arc welding is a source of intense ultraviolet radi-
ation, and care must be taken to ensure that arc welding
is not performed in protected areas without securing the
detector. In addition, UV detectors should not be posi-
tioned so that their cone of vision can scan the horizon.
Rather, they should be directed down over the designat-
ed hazardous area to reduce the likelihood of picking up
UV radiation from distant sources.
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