Uv Detector Options; General Application Information; Response Characteristics; Welding - Det-Tronics X5200 Instructions Manual

Quick Fire (High speed)
The Quick Fire (High Speed) feature can be used in
conjunction with the TDSA signal processing method.
This method overrides TDSA requirements in the event
of an intense signal. When Quick Fire is activated, the
detector is capable of responding to an intense fire signal
in less than 30 milliseconds (0.030 seconds). Using
the Quick Fire feature in conjunction with TDSA signal
processing allows the detector to provide a high speed
response to a large, non-flickering fire (such as in high
pressure gas applications) while maintaining an ability to
respond to smaller fires.

uv DEtECtOR OptIONs

The UV 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 detector in the X5200 can be programmed for:
– Arc Rejection
– 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 (see response
times in Appendix A).
standard signal processing
Standard signal processing is recommended for high-
speed suppression systems only.
speed operation, the standard processing mode does not
incorporate the arc rejection programming. This mode
should only be used in a controlled, indoor environment.
8.2
gENERal aPPlICaTION
INfORmaTION

REspONsE CHARACtERIstICs

Response is dependent on distance, type of fuel,
temperature of the fuel, and time required for the fire to
come to equilibrium. As with all fire tests, results must be
interpreted according to an individual application.
See Appendix A for fire test results.

wELDING

Electric arc welding is a source of intense ultraviolet
radiation. UV radiation from arc welding readily scatters
and can deflect across significant distances, even when
direct obstructions exist. Any open door or window can
allow nuisance UV radiation from arc welding to enter an
enclosed area.
It is recommended that the system be bypassed during
welding operations in situations where the possibility of a
false alarm cannot be tolerated. Gas welding mandates
system bypass, since the gas torch is an actual fire. Arc
welding rods can contain organic binder materials in
the flux that burn during the welding operation and are
detectable by the X5200. Welding rods with clay binders
do not burn and will not be detected by the X5200.
However, system bypass is always recommended, since
the material being welded may be contaminated with
organic substances (paint, oil, etc.) that will burn and
possibly trigger the X5200.

ARtIFICIAL LIGHtING

The X5200 should not be located within 3 feet of artificial
lights. Excess heating of the detector could occur due to
heat radiating from the lights.

EMI/RFI INtERFERENCE

The X5200 is resistant to interference by EMI and RFI,
and is EMC Directive compliant and CE marked. It will
not respond to a 5 watt walkie-talkie at distances greater
than 1 foot.

NON-CARbON FIREs

To allow for high-
The response of the X5200 is limited to carbonaceous
fuels. It should not be used to detect fires from fuels
that do not contain carbon, such as hydrogen, sulfur and
burning metals.
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