Prism targeting mode, Alignment mode – Fire Fighting Enterprises FIRERAY 100R User Manual
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4. Prism Targeting Mode
Apply power to the Detector. After 5 seconds the RED LED will flash once to indicate that the
model is a 50m detector, or twice to indicate a 100m detector.
Select Prism Targeting Mode by moving the Mode Switch to the upper position.
Find the prism by adjusting the horizontal and vertical thumbwheels until the AMBER LED is
continuously ON. The AMBER LED will be OFF when no signal is being received, then will
flash at an incrementing rate to determine the target position. The faster the flash the nearer
you are to the target (prism).
At this point it is essential to test that the prism and not another surface is reflecting
the beam. Cover the prism with a non-reflective material and confirm that the AMBER LED
turns OFF.
5. Alignment Mode
Select Alignment Mode by moving Mode Switch to the middle position. The Detector will
automatically adjust its infrared beam power and receiver sensitivity to give an optimum
receiver signal strength. The progress of this is indicated by the LEDs on the front of the
detector:
CONTINUOUSLY AMBER : The Detector is not receiving a signal. Go back to prism
targeting mode.
FLASHING RED : The Detector is receiving too much signal and is attempting to reduce
the infrared power output to compensate. Wait at this point until the LED is OFF, this may
take up to 20 seconds depending on the distance between Detector and Prism, the
shorter the distance the longer the time.
FLASHING AMBER : The Detector is receiving a weak signal and is attempting to
increase the infrared power output.
OFF : The Detector has optimised the infrared power and receiver gain for the current
orientation of the Detector and Prism. This does not mean that the Detector to Prism
alignment is at its optimum, i.e. if the power is too high, a misaligned Detector may be
receiving a fringe reflection from another object.
FLICKERING RED/AMBER : This state can occur sometimes. It means that the infrared
power is stepping through the optimum setting.
Continue to flow
diagram for procedure.
The Detector operating mode is selected
using the Mode Switch, situated on the rear
of the unit. It can be accessed by sliding a
finger between the body of the unit and the
wall.
Do NOT remove the detector from the
wall when accessing the Mode Switch