FFE Fireray 50RU Technical Bulletin page 5

5. Prism Targeting Mode.
Apply power to the Detector. There is a 5 seconds pre-charge delay after power is applied to allow the
internal circuits to stabilise correctly. After this period the RED indicator will flash once to indicate that the
model is a 50RU or will flash twice to indicate a 100RU.
Do not remove the detector from the wall during this action.
Using the mode switch (See fig. 4) select Prism Targeting Mode (Switch will be in the up position).
Find the prism by adjusting the horizontal and vertical thumbwheels until the AMBER indicator is
continuously ON. The AMBER indicator 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.
This can easily be confirmed by covering the prism with a non-reflecting surface and confirm that the
AMBER indicator is OFF.
6. Alignment Mode.
Mechanical alignment is provided by two adjustment thumb wheels on two sides of the Detector,
positioned just behind the Detector Head cover. Adjustment is achievable in both axes.
6.1. Enabling Alignment Mode.
Do not remove the detector from the wall during this action.
Using the mode switch (See fig. 4) select Alignment Mode (Move switch to the middle position).
6.2. Adjustment in Alignment Mode.
The Detector will automatically adjust its infrared beam power and receiver sensitivity to give an optimum
receiver signal strength.
The alignment progress is indicated by the color and state of the indicator lamp 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 indicator lamp 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.
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