Apollo Smoke Detector XP95 Installation Manual - Page 10

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Aligning the beam detector

The beam detector incorporates alignment by means

of an LED in the receiver as this method is convenient

and can be carried out by one person without the need

for cables or a voltmeter.

The receiver is ﬁ tted with a high-intensity red LED

which, in normal conditions, pulses when a ﬁ re is

detected. During commissioning this LED may also

be used to facilitate beam alignment and cal i bra tion

(note that local light conditions must allow the LED to

be visible over the entire beam length, ie, up to 100

metres. During commissioning of the beam detector

the LED will be in one of the following states:

Receiver LED ﬂ ash rate

Fast (4 ﬂ ashes/sec )

No ﬂ ash

Slow ﬂ ash (1 ﬂ ash/sec)

The beam detector is calibrated by means of a poten-

tiometer in the transmitter. To access the potentiom-

eter, remove the small clear plug on the side of the

transmitter.

Use a small screwdriver to rotate the potentiometer.

Do not use excessive force.

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Status of alignment

Signal strength too high

Optimum signal

Signal strength too low or

non-existent