National Fleet Tracking NFT-1175 User manual

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NFT-1175 / NFT-2820
Installation Manual
NFT-1175 / NFT-2820 Tracker | Revision Date 6-23-14

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Table of Contents
Before Installing ..................................................... 3
Tools Needed For Installation................................ 3
GPS Fundamentals ................................................ 4
Checking the Contents of the Box ....................... 4
Installing and Mounting the GPS Unit.................. 5
Cable Interface........................................................ 6
12 VDC Power Connection ........................ 6
Ground Connection.................................... 6
Refrigerated Trailer Option......................... 7
Temperature Sensor Wiring....................... 7
Activating the TTU-1200 Unit ................................. 8
Troubleshooting Chart .......................................... 9

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BEFORE INSTALLING
Prior to the installation process, thoroughly review and adhere to the following
items.
Installation Manual
Use only a Digital or Analog Volt Meter - DO NOT USE TEST LIGHT!
Check for possible installation locations for the GPS unit prior to
permanent installation.
ALWAYS LOOK BEFORE DRILLING. Make sure that the installation
process does not cause damage to any vehicle hose, electrical loom, or to
any part of the vehicle.
Make note of the unit serial number prior to installation.
Prior to working on any part of the dashboard (instrument cluster, center
console, glove box, etc.), remove the negative and positive terminal from
the battery to deactivate the sensors for the airbags. Refer to the Owner’s
Manual and to a Shop Manual for the vehicle for specific instructions in the
temporary disconnection process.
DO NOT place objects, including communication equipment, in the area
over the airbag or near the airbag deployment area.
Refer to the Owners Manual and to a Shop Manual of the vehicle for
specific information related to the electrical wiring, interior disassembly,
and any other mechanical aspects of the vehicle.
TOOLS NEEDED FOR INSTALLATION
Metric and standard socket set
Screwdriver set
Side cutters, wire cutters
Wire strippers
Pliers
Terminal crimpers
Digital Multimeter
Electrical tape
Flashlight
Warning: It is highly recommended that a Digital Multimeter be used when
probing electrical systems in the vehicle to prevent damage to factory
components.

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GPS FUNDAMENTALS
There is a minimum of 24 operational GPS satellites at all times. The satellites,
operated by the U.S. Air Force, orbit the earth every 12 hours. Each GPS
satellite transmits data that indicates its location and the current time. All GPS
satellites synchronize operations so that these repeating signals are transmitted
at the same instant. The signals, moving at the speed of light, arrive at a GPS
receiver at slightly different times because some satellites are farther away than
others.
The distance to the GPS satellites can be determined by determining the amount
of time it takes for their signals to reach the receiver. When the receiver
determines the distance to at least four GPS satellites, it can by triangulation,
calculate its position in three dimensions.
To ensure the GPS unit receives enough satellite signals at acceptable signal
strength, it must be mounted so that it has a clear view of the sky. In hidden
locations, such as under the dash, a clear view can be challenging. In these
locations, it is important to keep any metal interference as far as possible from
the top portion of the GPS unit so that the most accurate position can be
calculated.
While GPS data collection has improved in ease and speed, some obstacles
remain. Solid or dense objects can block GPS signals. Wet trees with heavy
branches and leaves can mask or attenuate GPS signals. Mountains and
buildings can block satellite transmission. Multipath signals can corrupt GPS
data. Multipath is a reflected signal from some nearby objects. The resulting
propagation delay can affect measurement accuracy. GPS electronics
advancements have reduced the multipath threat but GPS field operators and
users should be aware of obvious multipath environments.
CHECKING THE CONTENTS OF THE BOX
The contents of the box containing the NFT-1175 are shown below:
Model Contents
NFT-1175 1. NFT-1175 Unit
2. 2 Ring Crimp Terminals

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INSTALLING AND MOUNTING THE GPS UNIT
The GPS unit will work best if it has a clear view of the sky and as much of the
horizon as possible with no metal between it and the sky. Any metallic objects
between the GPS unit and the satellites will degrade the signal and reduce the
overall performance. For best signal acquisition, the roof of the trailer is the
recommended mounting position. (This will require extending the wires on the
unit to reach your trailer wiring socket or refer unit battery.) You can also mount
the device on the front of the trailer as pictured below. For refrigerated trailers
the device can be mounted inside the refer shroud (as long as it is plastic or
fiberglass) and you can use the refer units battery for the external power source.
WARNING Any metal structure can affect the accuracy of the GPS signals and
prevent normal operation. Location of the GPS unit is critical to the operation.
The GPS unit can be installed on
any type of vehicle. The unit should
be mounted so it will not be exposed
to damage from people or objects.
The GPS unit has tabs for mounting
screws or you can use epoxy or
double sided tape to attach the unit
to your trailer.