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MWA60R/T
10.0 CALIBRATIONS AND ADJUSTMENTS
1)
Face the device on sight, in the direction of the Transmitter, then connect a voltmeter between the negative (-)
and the
TP
(Test Point) terminal of the board.
2)
Face the device horizontally, by finding the position at which the maximum reading can be achieved on the
instrument. In the event that the measurement exceeds .3 V
—, the signal level shall be reduced by acting on
the
trimmer LEVEL
, so as to bring the signal to the optimum operation level, i.e. 7.3 V
—.
• A high signal value can be obtained even when the Receiver is not aligned with the Transmitter. In this case,
a reflection of the transmitted beam might be involved, which shall not be taken into account
• In the event that the signal does, with the
trimmer LEVEL
set to the maximum value, not reach 6.8 V
—, the
device shall be displaced vertically within the permitted limits.
• In the event that the minimum value of 6.8 V— cannot be obtained, the distance between the receiver and the
transmitter shall be reduced or, in any case, a more appropriate aligning position shall be found.
3)
Verify the quality of the received signal, bearing in mind the
following indications (if no apparent movement is detected
within the area to be protected):
•
green LED steadily ON: no signal disturbance;
•
green LED blinking (to a varying frequency): the signal
disturbance is low, yet it is detected by the barrier;
•
green LED blinking slowly (it goes out for approximately 1
second): the signal disturbance is more pronounced and is
nearing the barrier actuation threshold.
To obtain more precise indications of the disturbance amount, it is recommended that measurements shall be
made by means of an oscilloscope, as specified in paragraph 11 (Signal measurement by means of an
oscilloscope).
4)
Once the optimum operation condition has been achieved, perform the test by pressing the
TEST C.A.G.
button located on the Receiver board.
By keeping the button depressed, the alarm red LED will come on for about 10 seconds; then, the green LED
will come on, which will indicate the normal operation. By then, the button can be released.
5)
Upon completion of all the tests
– in order to ensure smaller consumption by the receiver – jumpers
S1
and
S2
(Off Led)
, which disable the green LED and the red LED respectively, can be removed.
Summary of Contents for MWA60R/T
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