Fireray 2000 Service et maintenance - Page 4

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FIRERAY 2000

01B-05-S1

1/01

ALIGNMENT

The detectors can be aligned by either using a dc voltmeter,

which is positioned at the Transmitter head and connected

via a 2-core cable to the Control Box or an Alignment Aid

which can be substituted for the voltmeter.

The Alignment Aid (Fig. 2) is lighter and more robust than a

meter and provides a convenient method of aligning the

detector heads. The display LED flashes at a faster rate when

correct alignment is achieved.

Align the detector heads as follows:

a) Switch on the 24V dc Supply to the Control

Box and the Transmitter/Detector.

b) Ensure the Test/Reset Switch on the Control

Box is set to OFF.

c) Set the Test/Reset Switch to ON.

d) Check the Signal Level control RV1 in the

Control Box is set to the mid-way position.

e) The High Gain (LED 3) and Low Gain

(LED 2) may both be lit.

Note: At this stage other LEDs in the Control Box may

be lit. This is due to the beams not being aligned

exactly.

f) Connect the Alignment Aid or dc voltmeter

as shown in Fig. 1 using 2-core cable.

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Fig. 2 Alignment Aid

g) Adjust the Transmitter head horizontally and

vertically so that the receiver detects the

beam in the round glass area such that either:

i) The Alignment Aid LED flashes at a high

rate - adjust for the fastest flashing rate.

ii) Or if using a voltmeter, adjust for a

maximum reading. (A no-signal reading

is approximately 2.6 volts).

h) When this has been done fully tighten the

screws holding the receiver and transmitter

to the ceiling brackets. Ensure that all

fixings are firmly tightened. Re-check the

alignment aid for faster flashing of the light

(to check the Beam Detector Set is working

correctly).

i) At the Control Box adjust RV1 until the

High Gain (LED 2) just goes off.

j) Switch off the power and disconnect the

Alignment Aid or voltmeter.

k) Set the Test/Reset switch to the off position.

Wait at least 45 seconds before performing

any tests.