CIAS Elettronica S.r.l. Ed. 1.5
Installation Handbook Page 51 of 57 MANTA 50 – 80
f. Gently unscrew the bracket screws of the transmitter and move the horizontal alignment,
looking for the maximum received signal on the receiver head as indicated in the previous
point “e”. When aligning the TX head, it is possible to acquire the new level signal simply by a
momentary interruption of the beam, for example by passing a hand through the beam in front
of the TX head, instead pushing S3 button.
g. Once the best alignment is achieved (maximum signal available), secure the bracket screws,
both on transmitter and receiver, to lock the horizontal movement.
h. Unlock the vertical movement of the receiver and move it slightly upward. Push S3 button and
then move the head downward looking for the maximum signal as indicated in the previous
point “e”.
i. Unlock the vertical movement of the transmitter and repeat the operation described for the
receiver vertical alignment. Once the best vertical alignment is achieved (maximum signal
available), lock the vertical movement both on transmitter and receiver.
j. Turn the function switch
SW1 to position 2
, making sure that during this operation nothing is
within the microwave beam. For example, ensure that people do not walk between the
transmitter and the receiver.
Remember that this operation is very important because it is now that the barrier acquires the
modulation channel value and the level of the microwave signal. A disturbance in the
microwave beam at this moment will make the installation incorrect and therefore it will not be
secure.
When button S3 is pressed the 2 leds D8 and D9 will illuminate together. The acquisition
ends a few seconds after the S3button is pressed. If the channel and the signal acquired are
correct the 2 leds D8 and D9 will turn off and the buzzer will BEEP. The number of beeps
indicate the quality of the alignment.
The following table shows the relationship between the number of beeps and the quality of
the alignment:
1 Beep = Excellent
2 beep = Good
3 Beep = Poor
4 Beep = Insufficient
5 or more Beep = No Alignment
If the alignment quality is poor or worse, repeat the alignment operations and verify that
nothing is within the microwave beam.
k. Select
position 3
on the “function switch”
SW1
. The
pre-alarm thresholds
adjustment phase
is activated. The two pre-alarm thresholds are set above and below the quiescent field value.
The analysis process begins when the field value, exceeds one of them.
To
read
the current pre-alarm threshold value proceed as follows:
•
Rotate decimal switch
SW2
(tens column) until the second red led (
D9
) comes ON
•
Rotate decimal switch
SW3
(units column) until the first red led (
D8
) comes ON
The values read will be between 01 and 80 (
default value 15
). Decreasing the threshold
value increases the sensitivity and the sensitive beam dimensions.
To
modify
the current value and increase the sensitivity it is necessary to select, using the
two switches SW3 and SW2, a lower value and then push the button S3. To decrease the
sensitivity, it is necessary to select, using the two switches SW3 and SW2, a higher value
and then push the button S3.
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