Access One WVD100, Product Manual

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WVD100
Product Manual
WVD100, Rev 2.5E Page 8
EZ Loop
Installation
Sensor Detection Overview:
The sensor is monitoring the magnetic axis of the earth and
looking for a change in the magnetic value. When a large metal
mass such as vehicle enters the detection range, the magnetic
values are changed and the sensor sends a signal to the AP100
Relay board. The value change is dependent upon the metal
mass. For example, a small hammer a few feet above the sensor
may not trigger the detection. But a large vehicle with a lot of
metal will trigger the sensor. The larger the metal mass, the
better the detection. Therefore bicycles, motorcycles and other
small metal vehicles may need to be very close to a sensor for
detection or may not be detected.
There is a 1-2 second delay from the sensor detecting and the
relay activating. This is normal to help prevent false activations
from the earth’s magnetic spikes. The sensor must see a full
second detection before sending the detect signal and the sensor
must be cleared for a full second before sending the off signal.
Sensor detection distance and performance will vary based upon
location of each application. Detection range is similar to a
rectangular bubble around the sensor. Average detection distance
from the sensor is approximately 8ft wide x 4ft deep x 3-4ft high.
In some occasions the distance may be less and in some occasions
the distance may more. A simple above ground test can help
define the distance.
The front and back detection is reduced when the sensor is
inactive and increased when in detection mode. For example, a
vehicle approaching the sensor straight on will not be detected
until 1-2 feet from the sensor. But when the sensor detects the
vehicle, it expands the depth to 1-2 feet from the sensor, or 2-4
feet total depth. This feature is used to reduce false triggers and
help to not pick up a slide gate after the vehicle has cleared. Side
detection is not reduced and is at full detection distance all the
time. To detect a vehicle sooner, rotate the sensor 90 degrees.
Installation
Sensor Location Overview:
For best results, sensors should be placed in the center of the
driveway or traffic lane.
1. Place the sensor in the center of the traffic lane and determine if one
or multiple sensors will be needed for full detection. There should be
less than 5ft from the edge of the detection and the side of the traffic
lane. This is usually a 16ft - 18ft wide lane.
2. In the case of a wide lane, two or more sensors may be needed to
cover the width. (Example: For a 25ft driveway and an 8ft detection
width, two sensors are recommended.)
3. If the sensor is going to be placed on the side of the driveway, make
sure it reaches far enough into the lane to detect the vehicles. Two
sensors, one on each side, may be needed for adequate detection.
4. Place the sensor far enough away from the gate so the moving gate
does not activate the sensor. This is usually 6-8 feet from the gate.
5. Refer to the Sensor Slide Gate Layout and Sensor Swing Gate Layout
for more guidelines.
4 feet
3-4 feet
4 feet
Driveway
Side
Si
de
6-8 feet Side to Side
3-4 feet
2-
3 f
ee
t
Ex
pa
nde
d
1-
2 f
ee
t
In
iti
al
Expanded Area
Expanded Area
Initial
Detection
Area
2-
4 f
ee
t
4-
6 f
ee
t
6 - 8 feet detection
5 feet or less 5 feet or less
3 - 4 feet
6 - 8 feet detection width
6-8 ft detection 6-8 ft detection
5ft or less 5ft or less 5ft or less
5ft or less
4 feet 4 feet
For multi-lane applications when two or more AP100s and
multiple sensors are close enough to each other, different
system IDs should be used for each system to prevent cross talk
between the two separate systems. For example, Lane 1 would
use ID 0001 and Lane 2 would use ID 0002. These IDs are field
settable. Refer to the “Change ID” programming on Page 19.