EXPLORER II - Outdoor Microwave Barrier
Outdoor Microwave Barrier - EXPLORER II
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3.3 ALIGNMENTBYTECNOTESTER
Proceedas follows:
+PositiontheswitchoftheTECNOTESTERon"OFF".
+Insert the jumper J2 (fig. 7) to exclude the automatic gain control.
+Connectthe TECNOTESTERcable tothe jumperCN2. Keepan eye
on the correct sense!
+Align the barrier so as to obtain the maximum signal. The number of
LEDs lit indicates the quantity of signals received. The indication "+1"
stands for the minimum of signals acceptable.
+Once the alignment has been finished, remove the jumper J2 (fig. 7)
and position the switch of the TECNOTESTER on "ON". In case of
intrusion, a buzzer signal is activated.
VATTENTION W
Ifthereareno movementsatall,TECNOTESTERmust notindicatea
value inferior to +1.
4. NOISELEVELCONTROL
The oscilloscope measures the level of electrical noise on the receiver.
Proceedas follows:
+Disconnect the transmitter opposite to the receiver tested from mains.
+Put the oscilloscope probe on the test point TP3 (fig. 7).
+Settheoscilloscope at50mV/div.
+Readtheamplitude ofthe signal.
Best functionality is given with an amplitude lower than 300mVpp. In case
the noise level exceeds 500mVpp, the power supply (AC) has to be
disconnected and the electronic board has to be powered merely by
battery or power supply (13.8V DC).
Shouldthe noise levelreturn to its regularlevel, the problemlies with line
voltage (e.g. voltage filter). In this case check the relative device.
If, however, after disconnecting the power supply the noise level remains
superior to 500mVpp, call for technical assistance.
Assoon as adjustmenthas been completed,connect the automatic gain
control by removing the jumper J2 (fig. 7).
After approximately 10 seconds the barrier is ready for integration and
sensivityadjustment.
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Fig. 10
5. INTEGRATIONANDSENSIVITYADJUSTMENT
TheinterventionofthedetectorcanbesetwiththehelpofthetrimmersPT3
(sensivity) and PT6 (integration). In the beginning set the trimmer PT3 at
minimum sensitivity (turn anticlockwise) and the trimmer PT6 at maximum
integration(anticlockwise).
Simulateanintrusionandverifythatthealarmcontactisactivatedeveninthe
mostcritical zones. Should the contact not be activated, increasesensivity
turningPT3 clockwise.
We recommend minimum integration of PT6 in order to avoid unwanted
alarmscausedbyincidentalmovements.
Functioningofthetrimmers
PT3 = Sensivity
The trimmer PT3 is to be turned clockwise to increase the diameter of the
microwavefield.Turnanticlockwisetoreducethediameterofthemicrowave
field.Theloweristhesensitivitythemorethesystemisprotectedagainstfalse
alarms.
PT6 = Integration
The trimmer PT6 is to be turned clockwise to get faster detection. Turn
anticlockwisetoreduceintegration.Smalldelaypermitstodetectveryquick
intrusions. Longer delay allows to avoid false alarms generated by small
animals like birds (fig.10).
VATTENTION W
Do not change the position of the trimmers varnished.
