Working Instructions; Setting At Work - PRASTEL MLX224A Manual Del Usuario

MLX224A
5.

WORKING INSTRUCTIONS

5.1 RESET/CALIBRATION push-button
The RESET push-button makes it possible to initialize the detector and automatically acquire the parameters of the loop
connected for correct functioning.
N.B. Making sure that there is no metallic mass on the loop, press the RESET push-button to carry out an automatic calibration of
the detector.
The RESET push-button must be pressed each time the position of one more dip-switches is varied.
The pressure of the RESET push-button let the yellow LED flashing up to the end of calibration; after that it is switched on.
5.2 LED indications (Fig. 4)
The switching status "loop in detection" is displayed by the green LED relevant to that channel; the green LED is switched on for
the whole loop-detection time.
Every failure of the loop (short-circuit, disconnection or loop inductance out of the measure range) is displayed by the red LED,
that shows the following indications:
•
short-circuit: slow blinking
•
open circuit: fast blinking
The yellow LED is blinking during the self-tuning phase: when the loop detector is operating, the yellow LED is permanently on.

5.3 SETTING AT WORK

•
Realize the connections for the undecal socket as shown in Fig. 4 and subsequently insert the detector as shown in the same
figure.
•
Set up the frequency through the dip-switches 5 and 6 as shown in Fig. 2. The change of frequency is mainly useful to avoid
interference between two near loops (2-3 mt.); in this last case it is necessary to set up different frequencies. As a general rule the
frequency must be low for large loop and high for small loop.
•
Set up the sensitivity through the dip-switches 2 and 3 as shown in Fig. 2. Setting the sensitivity allow to forbid the detection of
metallic body with little dimensions such as bicycle and motorcycle.
•
Set up the functioning mode of outputs OUT1 and OUT2 through the dip-switches 1 and 4 of CH1 and CH2 dip-switches groups
(Fig. 2 and Fig. 4).
•
Be sure that there is no metallic mass on the loop, and press the RESET push-button to carry out an automatic calibration of the
detector.
•
Carry out sensitivity tests with the various types of vehicles that the device must detect. If necessary, vary the setting of dip-
switches 2 and 3 until the desired sensitivity level is obtained. It is not advisable to use excessively high sensitivity values.
OUTPUT
MODE
IMPULSIVE
6 5 4 3 2 1
PRESENCE
6 5 4 3 2 1
PERMANENTLY
ENABLED CHANNEL
(RELAY ALWAYS
ACTIVATED)
6 5 4 3 2 1
DISABLED CHANNEL
(RELAY NEVER
ACTIVATED)
6 5 4 3 2 1
LEGEND
=
CHANNEL 1 / CHANNEL 2 DIP-SWITCHES SET UP
6 5 4
6 5 4 3
6 5 4 3
6 5 4 3
=
ENGLISH
SENSITIVITY
SELECTION
HIGH
3 2 1
MEDIUM HIGH
2 1
MEDIUM LOW
2 1
LOW
2 1
ISMLX224AEU_12_02
FREQUENCY
SELECTION
HIGH
6 5 4 3 2 1
MEDIUM HIGH
6 5 4 3 2 1
MEDIUM LOW
6 5 4 3 2 1
LOW
6 5 4 3 2 1
Fig. 2