COLLISION ALERT SYSTEMS
Wireless PreView®
WorkSight®
WWS7220
Sensor Operating Manual
APS-SUPPLY.COM
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
FCC STATEMENT
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
Warning: Changes or modications to this unit not expressly approved by the
party responsible for compliance could void the user’s authority to operate the
equipment.
NOTE: This equipment has been tested and found to comply with the limits of
a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to try and correct the interference.
APS-SUPPLY.COM
PATENTS
Patented under one or more of the following U.S. Patents:
5345471, 5523760, 5457394, 5465094, 5512834, 5521600, 5682164, 5630216,
5510800, 5661490, 5609059, 5774091, 5757320, 5581256, 5832772, 5519400,
5767953, 5767627, 5589838, 5563605, 5661385, 5517198, 5610611, 5883591,
5805110, 5754144, 7088284, and 7215278.
Other patents have been applied for.
TRADEMARKS
The names of actual companies and products mentioned herein may be the
trademarks of their respective owners. Any rights not expressly granted herein
are reserved.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
CONTENTS
Product Description ..............................................................................................
Sensor/Antenna Description ...................................................................
Object Detection Capability ....................................................................
Installation Instructions ........................................................................................
Before You Start ......................................................................................
Sensor/Antenna Location .......................................................................
Sensor/Antenna Mounting ......................................................................
Sensor Power Connection ......................................................................
Initial System Power Up and Test ...........................................................
PreView® Daily Maintenance ..............................................................................
Testing and Maintenance ........................................................................
Troubleshooting ...................................................................................................
Specications .....................................................................................................
Warranty Information ..........................................................................................
PreView® Conguration Options: ......................................................................
APS-SUPPLY.COM
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APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Product Description
The Wireless WorkSight® PreView® is a solid-state, pulsed radar object detection
system designed to alert vehicle operators to the presence of obstacles. The
system detects both moving and stationary objects in a pre-dened coverage
area and reports this information to the PreView Wireless Display WD7102.
Figure 1. Wireless WorkSight® PreView®
The Wireless WorkSight PreView sensor does not require cleaning and is not
affected by harsh weather conditions, including temperature extremes, rain, sleet,
snow, or fog. The Wireless WorkSight PreView Model WWS7220 has a detection
range that is adjustable from ten to twenty feet (three to six meters).
APS-SUPPLY.COM
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Sensor Description
The sensor transmits and receives low power 5.8GHz radar signals. It then
processes the returned signals to determine if an object has reected any
energy back to the sensor and reports this to the operator display. The sensor
is designed to process and report detections within ½ of a second allowing the
vehicle operator to quickly respond to any object within the detection zone. Power
is typically obtained from the machine reverse lights. The communication to the
display unit is wireless, eliminating the need to run a cable to the cab of the
machine.
The WorkSight PreView sensor has a continuous Built In Self Test which noties
the operator of sensor failure within a fraction of a second.
APS-SUPPLY.COM
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Object Detection Capability
The PreView® system is designed to supplement other safety practices and/
or devices, it is not to be the sole method of collision avoidance. The machine
operator is always the rst line of defense when safely operating a vehicle.
The Wireless WorkSight PreView system can detect most objects within the
detection zone. However, there are some instances where objects can go
undetected. Obstacle size, shape, relative location, and composition are all
factors determining if, when and where an object is detected. The PreView
system operates by transmitting a pulse of very low power electromagnetic
energy. Any energy that strikes an object reects a certain amount of this energy
back to the PreView sensor. If the returned energy is of sufcient magnitude, it
is used to indicate object presence and determine the object’s distance. While
the PreView system can resolve multiple objects, only the object closest to the
vehicle is reported to the operator display since it represents the most signicant
collision threat.
The amount of energy returned is based on a few factors:
APS-SUPPLY.COM
Size – a larger object usually reects more energy than a smaller object.
Composition – a metal object typically reects more energy than a non-
metallic object. A metallic object at the edge of the maximum detection
zone might be detected, whereas a wood object may not.
Scattering – a solid object reects more energy that a non-solid object
such as tree branches, gravel, bushes, etc.
Shape – complex shapes cause energy to be returned in a very non-
uniform way. Very small variations or movement can change detection
status.
Angle – an object at side perpendicular to the sensor will reect more
energy than an object at an angle. See Figure 1 for an example of how
angle can affect return energy.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
APS-SUPPLY.COM
Figure 2. Object Reection
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Installation Instructions
Before you Start
Prior to installing the Wireless WorkSight PreView sensor, take time to familiarize
yourself with the installation instructions, theory of operation, and system
components. Check the contents of the shipping package and verify the following
items are included:
Sensor (1)
Sensor Interconnect Cable (1)
User Manual/Operating Instructions and drill template
Sensor Stainless Steel Mounting Hardware
1-1/4” x 10-24 Bolts, Hex Locking Nuts, and Washers (4)
Sensor Location
The Wireless WorkSight PreView sensor mounting location is integral to proper
system operation. Ideally the sensor should be mounted on the rear center of
the vehicle at roughly 36” (1M) +/- 12” (0.3M) above the ground. The sensor
face should be perpendicular to the ground with the “PreView” graphic opening
upward. Select a location that will provide some protection from impact and debris
while allowing an unobstructed view of the target hazard area.
APS-SUPPLY.COM
Important!
Before the Wireless WorkSight PreView sensor is permanently installed to the
vehicle, verify that the selected mounting location provides a clear detection
zone. Temporarily attach the sensor in the proposed mounting location, apply
power to the system, and verify that nothing is being detected.
Sensor Mounting
1. Select the appropriate sensor mounting location.
2. The correct mounting conguration is with the sensor’s text in normal reading
position.
3. Using the drill template, scribe position marks through the holes. Drill 1/4”
(6mm) holes centered at the marks.
4. A 1-1/2” diameter clearance hole is required for the sensor connector and
mating cable connector.
5. Secure the sensor to the vehicle with the four supplied 10-24 UNC button
head screws, washers and nuts or equivalent. Apply a maximum torque of 22
inch pounds when securing the sensor.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Sensor Power Connection
Though the sensor communicates wirelessly to the display unit, it still requires a
wired connection to provide power and ground. Locate the vehicle’s reverse light
power wire and connect to the red wire on the sensor harness using 18AWG wire
minimum. Connect the black wire of the sensor harness to vehicle ground.
Figure 3. Sensor Power Connection
Initial System Power Up and Test
Once the sensor and WD7102 wireless display are installed, wired, congured,
and connected, power should be applied to test correct system operation by
energizing the machine and placing it into reverse. Follow the instructions in
the display manual (3700076_) to properly congure the display and connect
it to the sensor. When the system is operating correctly in an open eld with no
obstructions, the display should be showing the “Clear” screen. If the display is
indicating a detection and there is no object in the machine’s vicinity, check for
any objects on the machine which may be detected by the sensor. If possible
move the sensor so it is not detecting the object(s). If it is not possible to relocate
the sensor then consult Preco Customer Service.
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If for some reason the display is showing the “Not In Reverse” or “Sensor Not
Communicating” screen when the machine is in reverse, verify the display
is congured correctly see the display manual (3700076_). If the display is
congured correctly and the Troubleshooting section has been reviewed, please
contact Preco Electronics.
Once the system has been installed, the detection zone should be tested. This
test should be performed with two people, one who remains in the cab (the
operator), and one who walks through the sensor eld at the rear of the vehicle
(the assistant). The operator engages the parking brake, depresses the machine
brake, and places the machine in reverse. The assistant then walks through the
detection zone while the operator in the vehicle cab notes where the display
indicates a detection. By moving about the rear of the machine and noting when
the display indicates a detection, an accurate detection zone can be mapped.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
PreView® Daily Maintenance
Detach this page and place with daily operator maintenance procedures.
Safety Message to Operators of Vehicles with PreView Systems
1. The PreView system is intended as an Object Detection System and should
not be relied upon as your rst line of defense for the safe operation of the
vehicle. It should be used in conjunction with established safety programs and
procedures to augment the safe operation of the vehicle, ground personnel,
and adjacent property. Should the system become inoperative, it could
jeopardize the safety or lives of those who depend on the system for safety.
2. Testing and inspection of the system in accordance with these instructions
and record of the results should be listed on the daily maintenance report.
The units on operating vehicles must be tested each day prior to the vehicle’s
operation. Results of this test must be recorded in the maintenance log.
3. People operating this equipment MUST check for proper operation at the
beginning of every shift or safety inspection period.
4. People’s lives depend on the proper installation of this product in conformance
with these instructions. It is necessary to read, understand and follow all
instructions shipped with the product.
5. Failure to follow all safety precautions and instructions may result in property
damage, serious injury, or death.
6. The PreView Object Detection System is intended for commercial use. Proper
installation of a back-up aid requires a good understanding of truck electrical
systems and procedures, along with prociency in the installation.
7. Store these instructions in a safe place and refer to them when maintaining
and/or reinstalling the product.
APS-SUPPLY.COM
Testing and Maintenance
NOTE: A walk around test shall be performed every day to verify proper function
of the system and to familiarize the operator with the zone of detection. More
frequent inspections should be performed when:
• The vehicle is operating in a particularly dirty or harsh environment.
• The operator has reason to suspect the system has been damaged.
This test should be performed with two people, one who remains in the cab (the
operator), and one who walks through the sensor eld at the rear of the vehicle
(the assistant).
1. Clean the sensor face of any accumulation of dirt, mud, snow, ice, or debris.
2. Visually inspect the attached wiring and verify that they are properly secured,
not chang or dangling free where they could become snagged and damaged.
Inspect the Radar Sensor and Operator Display Module and verify that they
are securely attached to the vehicle.
3. Set the park brakes, start the vehicle, depress and hold the vehicle brake and
place the vehicle in reverse.
4. Verify the display is powered up and not indicating a detection.
5. The area to the rear of the vehicle should be clear of obstacles for a distance
of 8 meters. If the display is indicating a detection, then there are objects to
the rear of the machine that will interfere with the test. Move the machine to
a clear area and proceed.
1. The assistant should move to just behind the rear corner of the machine in
sight of the operator’s mirrors. He should then walk toward the centerline of
the machine parallel to the rear, while the operator notes when the display
indicates a detection.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Troubleshooting
Display cannot nd or connect to the wireless sensor:
• Verify that DC power (9-33V) is applied to the sensor.
• Sensor may be out of range. Contact Preco Electronics for assistance.
“Not In Reverse” message is present, but machine is in reverse:
• Verify display and sensor are congured properly.
• For installation method A (see the display manual), verify reverse connection
has 9-33V present.
• For installation method B (see the display manual), verify sensor is powered
and communicating.
“Connection To Sensor Failed!” message is present:
• Verify display and sensor are congured properly (see the display manual).
APS-SUPPLY.COM
• Verify sensor is powered and communicating (see the display manual).
There is a constant detection even if there is no object in the
machines vicinity:
• Check for any objects on the machine that the sensor may be detecting.
Relocate the sensor so it does not see these objects.
• If the detection is showing up in Zone 4 or 5, the sensor may be detecting the
ground. In an open eld, either move the sensor up higher or slightly angle
the sensor upward 5 to 10 degrees. The minimum recommended mounting
height is 24 inches.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Specications
SENSOR SPECIFICATIONS (Typical)
Transmitter: Pulsed RF transmitter at 5.8GHz operating under FCC Part 15.249
Electronics: Solid state
Connector: Deutsch DT06-08SA-E008
Sealing: Encapsulated to protect from dust and moisture, designed to meet IP67.
Housing Material: Polycarbonate radome
Dimensions: 4.4”H x 10.5”W x 1.4”D (11.2cm x 26.7cm x 3.6cm)
Weight: 2.3 lb. (1.04 kg)
Operating Temperature: -40°F to +185°F (-40°C to +85°C)
Vibration: 25G RMS all three axes
Shock 25G all three axes
Mounting Four 0.25” (6.4mm) diameter holes on 8.54” horizontal centers and 2.00” vertical
ELECTRICAL SPECIFICATIONS
Input Voltage: 9-33VDC, over voltage protected to 150V
Input current: 0.2 amp maximum, inrush current limited to 1A
Polarity: Negative ground, Polarity protected to 150V
Power Connection: Two 20 AWG wires, connect to reverse signal lamp circuit
Auxiliary Output: Single 20 AWG wire, +150V tolerant
Active State: switched to ground, over current protected to 1 amp sink maximum.
Inactive State: high impedance
OPERATING CHARACTERISTICS
Detection Range: User Adjustable from 10-20 FT (3-6M)
Warning Ranges: User Adjustable
APS-SUPPLY.COM
centers. Unit is supplied with #10 SS screws for mounting purposes. Recommended
torque is 22 inch-lbs.
COMMUNICATION
Wireless ZigBee 2.4GHz, IEEE 802.15.4 compliant DSSS baseband
Data Update Rate 125mS
MAINTENANCE
Daily: Follow test and maintenance procedure.
REGULATORY COMPLIANCE
Compliant with FCC Part 15.249 & FCC part 15.247
FCC ID: OXZWWS72XX
PRODUCT MANUFACTURED IN THE USA
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
Warranty Information
MANUFACTURER STANDARD LIMITED WARRANTY AND LIMITATION OF LIABILITY
Manufacturer warrants that on the Date of Purchase this Product will conform to Manufacturer’s published
specications for the product, which are available from Manufacturer on request, and Manufacturer warrants
that the product is free from defects in materials and workmanship. This Limited Warranty for the sensor extends
for twenty-four (24) months; the display is sixty (60) months - from the date of shipment. Manufacturer will, at its
option, repair or replace any product found by Manufacturer to be defective and subject to this Limited Warranty.
This Limited Warranty does not apply to parts or products that are misused; abused; modied; damaged
by accident, re or other hazard; improperly installed or operated; or not maintained in accordance with the
maintenance procedures set forth in Manufacturer’s Installation and Operating Instructions.
To obtain warranty service, you must ship the product(s) to the specied Manufacturer location within thirty (30)
days from expiration of the warranty period. To obtain warranty service you must call Preco Customer Service
at 866-977-7236 or 208-323-1000, or fax your request to 208-323-1034. Customer Service will issue warranty
authorization and further instructions. You must prepay shipping charges and use the original shipping container
or equivalent.
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EXCLUSION OF OTHER WARRANTIES: MANUFACTURER MAKES NO OTHER WARRANTIES, EXPRESSED,
IMPLIED OR STATUTORY. THE IMPLIED WARRANTIES FOR MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE ARE HEREBY EXCLUDED AND SHALL NOT APPLY TO THE PRODUCT. BUYER’S
SOLE AND EXCLUSIVE REMEDY IN CONTRACT, TORT OR UNDER ANY OTHER THEORY AGAINST
MANUFACTURER RESPECTING THE PRODUCT AND ITS USE SHALL BE THE REPLACEMENT OR
REPAIR OF THE PRODUCT AS DESCRIBED ABOVE.
LIMITATION OF LIABILITY: IN THE EVENT OF LIABILITY FOR DAMAGES ARISING OUT OF THIS LIMITED
WARRANTY OR ANY OTHER CLAIM RELATED TO MANUFACTURER’S PRODUCTS, MANUFACTURER’S
LIABILITY FOR DAMAGES SHALL BE LIMITED TO THE AMOUNT PAID FOR THE PRODUCT AT THE TIME
OF ORIGINAL PURCHASE. IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR LOST PROFITS,
THE COST OF SUBSTITUTE EQUIPMENT OR LABOR, PROPERTY DAMAGE, OR OTHER SPECIAL,
CONSEQUENTIAL OR INCIDENTAL DAMAGES BASED UPON ANY CLAIM FOR BREACH OF CONTRACT,
NEGLIGENCE OR OTHER CLAIM, EVEN IF MANUFACTURER OR A MANUFACTURER’S REPRESENTATIVE
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Manufacturer shall have no further obligation or liability with respect to the product or its sale, operation and
use, and Manufacturer neither assumes nor authorizes the assumption of any other obligation or liability in
connection with such product.
This Limited Warranty gives you specic legal rights, and you may also have other legal rights which vary from
state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages, so
the above exclusion or limitation may not apply to you.
Any oral statements or representations about the product which may have been made by salesmen or
Manufacturer representatives do not constitute warranties. This Limited Warranty may not be amended, modied
or enlarged, except by a written agreement signed by an authorized ofcial of Manufacturer which expressly
refers to this Limited Warranty.
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
PreView® Conguration Options
Custom System Congurations – Thanks to the advanced engineering by the Preco Engineers, the technology
behind PreView Sensors can easily integrate or control your vehicles existing or new safety systems.
APS-SUPPLY.COM
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
NOTES
APS-SUPPLY.COM
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
COLLISION ALERT SYSTEMS
NOTES
APS-SUPPLY.COM
APS USA
610 Gateway Center Way, Suites J & K
San Diego, CA 92102 USA
P: 1 619 263 4164
www.aps-supply.com
F: 1 619 263 6814
APS Australia
Unit 1, 72 Kent Way
Malaga WA 6090 Australia
P: 61 (8) 9248 4419
F: 61 (8) 9248 4901
APS: Singapore
Colombia
Chile
Perú
Brasil
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