Vishay Precision Group VPG On-Board Weighing SI Onboard TruckWeigh Use and care manual

TruckWeigh™ Installation,
Setup and Calibration Manual
SI Onboard
A Brand of VPG On-Board Weighing
Part Number 6190236 Revision 1.1

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SI Onboard TruckWeigh™ Manual
Important Information
IMPORTANT INSTALLATION INFORMATION AND LIABILITY WAIVER
SI Onboard designs and manufactures on-board vehicle weighing equipment.
These installation guidelines are provided solely for the use of trained installers
and represent the correct, safe and recommended method of installation.
They must be followed fully to ensure proper, safe installation. Failure to do so
may result in serious consequences including, but not limited to, failure of the
system to function properly and damage to the weighing equipment that could
jeopardize the stability and safety of the vehicle.
SI Onboard accepts no responsibility or liability for consequences arising
from any improper installation of the weighing equipment including but
not limited to, any misapplication or misinterpretation of the installation
information contained herein.
Strict observance of these guidelines should help to ensure accurate weight
measurement and enable safe operation of the vehicle. Failure of our on-board
vehicle weighing equipment due to poor installation workmanship or incorrectly
installed elements remains solely the responsibility of the installer.
SI Onboard does not accept responsibility for the structural integrity of the
vehicle concerned, for any part thereof, and for its proper, safe operation.
The company also reserves the right to make any amendments and alterations
to this document deemed necessary. You should ensure you have the current
version of this information by contacting SI Onboard prior to performing
installation, such as on our website at www.obwvpg.com

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SI Onboard TruckWeigh™ Manual
Contents
Installation................................................................................................................................................................................... 5
Introduction and Scope......................................................................................................................................................... 6
Introduction................................................................................................................................................................................ 6
Scope................................................................................................................................................................................................. 6
TruckWeigh™ Components.............................................................................................................................................. 7
Tools required................................................................................................................................................................................... 8
Checklist ....................................................................................................................................................................................... 8
Typical System Schematics.............................................................................................................................................. 9
Installation of Junction Box for TruckWeigh™ Axle Transducers ................................... 10
Installation of Air Transducer Interface Box ............................................................................................. 10
Installation of Air Pressure Transducer .......................................................................................................... 11
Steel Axle Transducer Installation ........................................................................................................................ 12
Positioning of Transducers on Front Strut Type Suspension .............................................. 13
Positioning of Steel Axle Transducers on Front Leaf Springs............................................... 13
Positioning of Transducers on Rear Single Axle Leaf Springs............................................. 14
Positioning of Transducers on Rear Steel Spring Bogie (Tandem Axle).................... 15
Positioning of Transducers on Rear Hendrickson Rubber Bogie ..................................... 15
Axle Transducer Mounting ............................................................................................................................................ 16
Points to consider .......................................................................................................................................................... 16
Connect the Transducers to the Junction Box ...................................................................................... 17
Install the Chassis and Cab Cabling................................................................................................................... 18
Securing Excess Cable....................................................................................................................................................... 18
Optional Jumper Settings................................................................................................................................................ 19
Power ON Jumper – JP1........................................................................................................................................... 19
Serial Power On Pin 9........................................................................................................................................................... 19
Serial Power On Pin 9 – JP2................................................................................................................................. 19
Install the Meter in the Cab .......................................................................................................................................... 20
Installing the Meter......................................................................................................................................................... 20
Install Truck to Trailer Cable – Truck Side .................................................................................................... 22
Install Truck to Trailer Cable – Trailer Side .................................................................................................. 22
Install 511 Transmitter (Optional)............................................................................................................................ 22
Install Printer (Optional)..................................................................................................................................................... 22

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SI Onboard TruckWeigh™ Manual
Contents
Setup................................................................................................................................................................................................... 23
Introduction and Scope...................................................................................................................................................... 24
Introduction............................................................................................................................................................................. 24
Scope.............................................................................................................................................................................................. 24
Front Panel Functionality ................................................................................................................................................. 25
Power Up the Meter for the First Time............................................................................................................. 26
Entering the Setup Menu.................................................................................................................................................. 26
Changing a Parameter Value ....................................................................................................................................... 26
How to change a parameter value........................................................................................................................ 26
Obtain the Truck’s GVWR and Axle Ratings............................................................................................... 27
Junction Box Configuration - Overview.......................................................................................................... 27
Junction Box Configuration – Examples........................................................................................................ 28
Junction Box Configuration ......................................................................................................................................... 28
Set the Number of Axles and Check the Weigh Mode................................................................... 29
Set the Meter’s Time and Date .................................................................................................................................. 29
Set the Overload Alarm Set Points ....................................................................................................................... 29
Set the Slope Compensation....................................................................................................................................... 30
Configure Tandem Axle (Bogie) Mode............................................................................................................... 31
Tag Axle – Overview................................................................................................................................................................ 32
Configure Tag Axle – if Required............................................................................................................................. 34
Configure Optional 511 Transmitter..................................................................................................................... 34
Configure Optional Printer.............................................................................................................................................. 35
Record the Firmware Versions and Other Details............................................................................... 35
Set the Manager and User PINs............................................................................................................................... 35
Calibration................................................................................................................................................................................ 37
TruckWeigh™ Calibration Process....................................................................................................................... 38
Prerequisites .......................................................................................................................................................................... 38
Weighing the Vehicle..................................................................................................................................................... 38
Procedure .................................................................................................................................................................................. 39
Appendices............................................................................................................................................................................. 43
Junction Box Configuration Diagrams............................................................................................................. 44
4x2 Rigid Chassis...................................................................................................................................................................... 44
6x4 Rigid Chassis...................................................................................................................................................................... 45
8x4 Rigid Chassis...................................................................................................................................................................... 46
4x2 Rigid Chassis...................................................................................................................................................................... 47
4x2 Tractor/Trailer..................................................................................................................................................................... 48
6x4 Tractor/Trailer..................................................................................................................................................................... 49
4x2 Tractor/Trailer..................................................................................................................................................................... 50
Summary of Settings/Parameters ......................................................................................................................... 51
Parts list ............................................................................................................................................................................................... 57

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Installation
SI Onboard
Installation
SI Onboard TruckWeigh™ Manual
Installation

6
SI Onboard TruckWeigh™ Manual
Installation
Introduction and Scope
Please read this installation guide completely before starting the installation so that
all areas are fully understood.
Introduction
TruckWeigh™ is a vehicle payload optimization, overload monitoring and load distribution
system for use on vehicles with steel spring or air suspension or a combination of the two.
Scope
This document is intended as a guide to the installation of TruckWeigh™.
It is only concerned with the two currently supported transducer types for use in a
TruckWeigh™ system:
• TruckWeigh™ axle transducers that measure
suspension deection for use on mechanically
spring suspension systems.
• Air pressure transducers for use on air
suspension systems.
In order to support known chassis types, various system options can be congured using
either of the above transducers or certain combinations of the two.
Any display screenshots used in this document are intended as an illustration of the menu
function being described; as such any specic detail or settings shown will differ from one
installation to another.
Attention:
The TruckWeigh™ indicator has a certain amount of legacy functionality available
through its menu structure which is not considered to be a part of the TruckWeigh™
program, hence is not supported and falls outside the scope of this guide.
Important Notes:
To ensure a reliable and properly functioning system particular importance should be
paid to the following:
• TruckWeigh™ axle transducer installation and conguration – suitable location and
orientation for the transducer should be carefully identied and that location should
then be prepared for the transducer to be attached.
• Slope compensation should also be recorded correctly.
These are covered in detail in this installation guide.

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Installation
SI Onboard TruckWeigh™ Manual
TruckWeigh™ Components
Before starting the installation check that you have the correct
kit of parts for the truck. See Appendix C for a full parts list
including part numbers.
Air suspension groups
will use an air transducer
and interface unit for each
group. An air group can be
1 or more axles connected
to the same air circuit.
Single Air Transducer and Interface
Fig 1.04
Where pressure is
controlled independently
on left and right hand sides
a dual air transducer unit
must be used.
Dual Air Transducer and Interface
Fig 1.05
There is only one meter per
system; this is where the
weights are calculated.
The meter is used for all
display, setup, calibration
and diagnostic functions.
TruckWeigh™ Meter
Fig 1.06
The power cable is used to
connect the meter to the
truck power. There is one
per meter.
Power Cable
Fig 1.07
The signal cable connects
the meter to one or more
junction boxes. There
is one signal cable per
junction box.
Signal Cable
Fig 1.08
Each steel suspension axle
uses a pair of TruckWeigh™
axle transducers.
For example:
• 4x2 all steel suspension
would require 4 axle
transducers.
• 6x4 all steel suspension
would require 6 axle
transducers.
• 8x4 all steel suspension
would require 8 etc.
Axle Transducer
Fig 1.01
The axle transducers
connect to the meter via
junction boxes.
The 4 way junction box
(used also as 2 way
junction box).
• 1x4 way is used for 1
axle/2 transducers with
unused ports blanked
off with dust covers.
• 1x4 way is also used
for 2 axle/4 transducer
installations.
• 2x4 way is used for
4 axle/8 transducer
installations.
CAN Junction Boxes
Fig 1.02
6-way junction box
• The 6 way junction box
is only used for 3 axle/6
transducer installations.
Fig 1.03

8
Please note:
Some optional items are not shown here.
These are:
1. 511 hand held display transmitter
2. Thermal printer
They are shown along with their installation details at the
rear of this section of the guide.
The interlink cables are used
to extend each transducer
cable and connect it to the
junction box. Normally one
cable is used per transducer.
In some cases the axle
transducer may reach the
junction box without the use
of an interlink cable.
Interlink Cable
Fig 1.09
The Signal Y Splitter
cable is used when it is
necessary to connect two
signal cables to the meter,
for example, on an 8x4
where two 4way junction
boxes are used.
Signal Y Splitter
Fig 1.10
This is used only on
articulated vehicles,
one per system.
Truck to Trailer Cable – Truck Part
Fig 1.11
This is used only on
articulated vehicles,
one per system.
Truck to Trailer Cable – Trailer Part
Fig 1.12
✓7⁄16” wrench
✓7⁄16” socket and ratchet wrench
✓1⁄4” wrench (if installing a truck to
trailer cable)
✓1⁄4”socket and ratchet wrench
(if installing a truck to trailer cable)
✓Center punch
✓Air or electric drill
✓1⁄8” drill bit
✓9⁄32” drill bit
✓3⁄16” drill bit (if installing a truck to
trailer cable)
✓Wire cutters
✓Red, yellow and blue crimping tool
✓Wire strippers
✓Clamps (to apply pressure to the axle
transducers during installation)
Tools required
Checklist
SI Onboard TruckWeigh™ Manual
Installation

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Typical System Schematics
The above diagrams are examples only and show how
systems on rigid and articulated vehicles might look.
Leaf
Spring
Air
Spring
Air
Spring
Air
Spring
Leaf
Spring
Leaf
Spring
TruckWeigh
Indicator
CAN Air Pressure
Junction Box
and
Transducers
Suspension
Air Bags
CAN Junction Box
and
Axle Transducers
TruckWeigh
Truck Air
System
Truck Air
System
Leaf
Spring
Air
Spring
Air
Spring
Air
Spring
Leaf
Spring
Leaf
Spring
TruckWeigh
Indicator
CAN Air Pressure
Junction Box
and
Transducers
Suspension
Air Bags
CAN Junction Box
and
Axle Transducers
TruckWeigh
Truck Air
System
Truck Air
System
TruckWeigh Kit Number
WKTW10005
CAN Junction Box
and
Axle Transducers
TruckWeigh
Indicator
TruckWeigh
Leaf
Spring
Leaf
Spring
TruckWeigh Kit Number
WKTW10005
CAN Junction Box
and
Axle Transducers
TruckWeigh
Indicator
TruckWeigh
Leaf
Spring
Leaf
Spring
Fig 1.13
Fig 1.14
Installation
SI Onboard TruckWeigh™ Manual

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Installation of Air
Transducer Interface Box
For trucks and trailers with air suspension, install one or more
air transducer interface boxes.
Identify a suitable location for each junction box:
• Each junction box needs to be located close enough to the
transducer positions for the cables to reach it.
• Choose a position that is protected and easy to access.
The air transducer interface box is mounted using 4 x 1⁄4” x 1”
screws and Nyloc nuts. Depending on where it is mounted,
different length screws may be required.
If desired, drill 2 or 4 pilot holes with a 1⁄8” drill.
Drill 4 x 9⁄32” holes in an appropriate location and mount the air
transducer interface box in a similar way to that shown in the
photo above.
The air transducer interface box can be mounted in any
orientation, ideally the cable glands to the air pressure
transducers should point downwards.
Installation of Junction Box
for TruckWeigh™
Axle Transducers
For trucks with mechanical suspension, install one or more
junction boxes.
Identify a suitable location for the junction box:
• Each junction box needs to be located close enough to the
transducers so the cables reach it.
• Each junction box must be mounted on a vertical surface
of the chassis or sub frame with the ‘UP’ arrow pointing
straight up and the ‘FORWARD’ arrow pointing towards
the front of the truck.
• Select a location that is relatively protected and easy
to access.
Fig. 1.15 is shown as an example only. It may be desirable to
mount the junction box to the chassis via a separate mounting
plate that picks up existing chassis holes. The junction boxes
are mounted using 2 or 4 x ¼” x 1” screws and Nyloc nuts.
Socket cap head or Phillips head machine screws should be
used, do not use hex head bolts. Depending on where it is
mounted, different length screws may be required.
Fig 1.15
Fig 1.16
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Installation

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Make the connection from the air transducer interface box to
the air transducer, running and securing the cable following
the usual precautions:
• Ensure that cable to cable connections are well supported.
• Avoid running cables on or near sharp objects.
• Keep cables away from hot components such as exhausts
and engines.
It is recommended that self-amalgamating tape is
wrapped around the air transducer connector and
a little way up the cable.
Fig 1.19
Circuit prior to installing the air transducer.
Installation of Air
Pressure Transducer
Decide on where to position the air transducer in the
suspension air circuit. The air transducer must be between
the self-leveling valve and the air bellows, as shown below in
gures 1.17 and 1.18).
Circuit with air transducer installed.
Find a location where the
air pipe is well supported
and there is space for
the air transducer to be
installed properly without
fouling anything.
Fig 1.18
Fig 1.20
Cut the air pipe and
insert the 2 ends into the
air transducer push t
couplers as shown below.
Push
Fig 1.17
Installation
SI Onboard TruckWeigh™ Manual

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Steel Axle Transducer Installation
If the system uses steel axle transducers, you will need to rstly decide the correct location for the
transducers. The transducers must be mounted on as at a surface as possible to ensure a strong
bond of the adhesive that retains the transducer.
There are some basic rules for transducer orientation:
• Each transducer must be mounted with the groove around the transducer on top, as shown
below (in gure 1.21).
• Each transducer must always be mounted inline with the chassis (unless they are on struts)
in such a way as to ensure the face adjacent to each groove is facing up (see gure 1.21).
• The cable from the transducer must always point from the transducer in the direction of
the pivot point of the suspension component to which it is attached. See Fig 2.12 for
more information.
Groove UpAdjacent Face
Fig 1.21
SI Onboard TruckWeigh™ Manual
Installation

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Positioning of Steel Axle
Transducers on Front
Leaf Springs
The transducers can be mounted on either end of the leaf
spring as shown in the diagrams below. Care should be
taken to ensure the transducer cannot come into contact
with any part of the vehicle during the full range
of movement of the spring.
Fig 1.23
Fig 1.24
Fig 1.25
Note: Position of groove
• When the transducers are mounted in this orientation they
are referred to as “leading”. (see gure 1.23)
• Record the transducer orientation into the Installation &
Calibration Record for entry into the meter during its setup.
The transducers may also be mounted at the front of the leaf
spring as shown above.
• When the transducers are mounted here they are referred
to as “trailing” (see gure 1.24).
• Record the transducer orientation into the Installation &
Calibration Record for entry into the meter during its setup.
Remember to leave only enough loose cable to allow the
transducer to move with the spring without pulling the cable
tight. Excessive loose cable may result in the cable being
snagged (see gure 1.25).
Front of Truck
Front of Truck
Positioning of Transducers
on Front Strut Type
Suspension
With strut type front suspension mount the transducers as shown
(see gure 1.22):
• When installing transducers to a strut type suspension they
must be installed perpendicular to the truck chassis.
• When the transducers are installed to this type of suspension
and in this orientation they are not subjected to the slope
compensation correction, therefore the relevant axle would
be congured in the meter as “Slope Compensation – none”.
Record the transducer orientation into the Installation &
Calibration Record for entry into the meter during its setup. Fig 1.22
Installation
SI Onboard TruckWeigh™ Manual

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Positioning of Transducers
on Rear Single Axle Leaf
Springs
The transducers can be mounted on either side of the leaf
spring as shown in the diagrams below. Care should be
taken to ensure the transducer cannot come into contact
with any part of the vehicle during the full range of movement
of the spring.
Fig 1.26
Fig 1.27
Note: Position of groove
• When the transducers are installed on the rear of
single axle leaf springs, as shown above (see gure
1.26), they are referred to as “leading”.
• Record the transducer orientation into the Installation
& Calibration Record for entry into the meter during
its setup.
The TruckWeigh™ axle transducer may also be mounted at the
front of the leaf spring as shown above.
• When the transducers are installed on the front of single
axle leaf springs, as shown above (see gure 1.27), they
are referred to as “trailing”.
• Record the transducer orientation into the Installation &
Calibration Record for entry into the meter during its setup.
Front of Truck
Front of Truck
Fig 1.28
Transducer on a single axle spring (rear)
SI Onboard TruckWeigh™ Manual
Installation

15
Note: Position of groove
Positioning of Transducers
on Rear Steel Spring Bogie
(Tandem Axle)
‘Bogie’ or ‘tandem axle’ (see gure 1.29)
Positioning of Transducers
on Rear Hendrickson
Rubber Bogie
‘Bogie’ or ‘tandem axle’ (see gure 1.31)
The transducers are mounted on the underside of the leaf
springs with the cables all facing the center of the bogie. In this
example (see gure 1.30) the front transducers are referred to
as ‘leading’. The rear transducers are referred to as ‘trailing’.
With Hendrickson rubber type rear suspension, mount the
transducers on the torque arms.
The torque arms may be round or square.
The transducers are mounted with the cables all facing the
center of the bogie (see gure 1.33).
You may mount the transducers under or on the sides of
the torque arms (see gure 1.32) providing you observe that
the groove indicating the top of the transducer is up and the
transducers are as parallel with the chassis as possible.
Front of Truck
Fig 1.31
Fig 1.32
Fig 1.33
Fig 1.29
Fig 1.30
Installation
SI Onboard TruckWeigh™ Manual

16
Axle Transducer Mounting
Points to consider
For effective adhesion of the transducer the following points
need to be carefully considered:
• Location of the transducer site should be away from
moving parts.
• Mating faces need to be clean and dry.
• The temperature of the surfaces should be above 60ºF.
• Pressure needs to be applied to bond the surfaces during
initial installation.
1. The transducers need to be located sufciently far away
from any moving parts. The example below shows how
much leaf springs and shackles move when a truck is full
compared to when it is empty.
Step 5
Clean the prepared area with
the VHB surface cleaner,
allowing the solvent to
evaporate to leave a
dry surface.
Step 6
Example of a properly
prepared transducer site.
After cleaning the transducer
with VHB surface cleaner
apply pressure to the tape
using a roller.
Use a clamp to apply
pressure to the assembly
for 5 minutes.
Tip:
Identify the transducer’s connector or its extension cable’s
connector with the location of the transducer so you can
easily identify them when connecting to the junction box.
The most commonly used method is to number them to
match the numbers printed on the junction box label,
i.e. 1 – Left front, 2 – Right front and so on. This could be
done using an indelible marker or even a corresponding
number of cable ties.
3. Consider the temperature.
• The ideal temperature for application is 70ºF.
• It is not recommended to t the VHB tape at temperatures
below 60ºF.
• Preferably t the transducer to the springs in a workshop.
• Where necessary, warm the spring with a hot air gun prior
to bonding the transducer.
4. Pressure needs to be applied to make the adhesive
contained in the VHB tape work.
And finally…
Fit cable ties to provide
mechanical support during
the bonding time (100%
bond in 72 hours). Cable
ties can be left in place
indenitely. Movement of
the vehicle during this time
is acceptable.
2. The transducer site must be thoroughly cleaned of all dirt
and debris. If necessary any loose paint and rust must
be cleaned down to bare metal. The site must be totally
dry and the surface should be sanded prior to transducer
installation. The following photos show each step of
preparing the transducer site.
Truck Empty Truck Full
Fig 1.34 Fig 1.35
Step 1
Dirty and wet spring.
Step 2
Thoroughly clean the
transducer site with a non-
lubricant solvent cleaner.
Fig 1.36 Fig 1.37
Step 3
Clean off solvent and dry
the transducer site.
Step 4
Sand the area using
maroon Scotchbrite.
Fig 1.38 Fig 1.39
Fig 1.40 Fig 1.41
Fig 1.42 Fig 1.43
Fig 1.44
SI Onboard TruckWeigh™ Manual
Installation

17
Connect the Transducers
to the Junction Box
When installing cables from TruckWeigh™ axle transducers
to the junction box ensure you connect the transducers in the
sequence as shown on the label of the junction box.
Route the cables along the chassis with an existing cable run.
Use cable ties to support the cabling.
• Ensure that cable to cable connections are well supported.
• Avoid running cables on or near sharp objects.
• Keep cables away from hot components such as exhausts
and engines.
Connect each cable to its corresponding junction box and
port number. Where a second junction box is used the port
numbers are offset by 4.
So… Transducer 5 connects to port 1
Transducer 6 connects to port 2
Transducer 7 connects to port 3
Transducer 8 connects to port 4
As shown in the diagram below (gure 1.46).
Mark each end of the
interlink cable with the
position of the transducer
it connects to e.g.
1= Axle 1 L/H Transducer
2= Axle 1 R/H Transducer
3= Axle 2 L/H Transducer
4= Axle 2 R/H Transducer
TRANSDUCER 1
TRANSDUCER 5
TRANSDUCER 2
1
1
3
3
2
2
4
4
TRANSDUCER 6
TRANSDUCER 3
TRANSDUCER 7
TRANSDUCER 4
JB1
JB2
TRANSDUCER 8
Fig 1.46
Fig 1.45
Installation
SI Onboard TruckWeigh™ Manual

18
Install the Chassis
and Cab Cabling
Install the cabling to connect the junction boxes and air
transducer interface boxes to the meter in the cab.
When more than one junction box is used mark both
ends of each signal cable so that each cable and
therefore junction box can be identied at the meter.
Use a Y Splitter Cable to connect each signal cable
to the meter.
Securing Excess Cable
For cables that are longer than they need to be you will
need to loop them and retain them using cable ties.
Note:
If you are installing a system on a semi-truck you will
need to refer to the sections for installing the truck to
trailer cable.
Fig 1.48
Step 1.
If possible have the cable in a clear section of chassis.
Fig 1.49
Step 2.
Loop the excess cable back on itself to form a bundle and
cable tie.
Fig 1.50
Step 3.
Add extra ties, tension and cut off excess.
Fig 1.51
Step 4.
Now attach the cable bundle to a convenient support.
Fig 1.52
Step 5.
Tension the cable ties and cut off the excess.
Fig 1.47
SI Onboard TruckWeigh™ Manual
Installation

19
JP2
Optional Jumper Settings
Power ON Jumper – JP1
If required by the customer, the meter can be made to power
on when the ignition key is turned.
To open the meter and t jumper JP1 on the PCB, remove the
4 Torx screws at the front of the meter and the 4 screws at the
rear of the meter and slide out the PCB.
Serial Power On Pin 9
Serial Power On Pin 9 – JP2
If required pin 9 of the D type connector can supply power to
the peripheral device.
When jumper JP2 is closed power is available from pin 9 of
the 9 way RS232 D type socket to drive a serial peripheral.
This feature supplies a voltage of 12V DC with a current limit of
approximately 150mA.
Follow the previous instructions to open the meter.
The location of “power on” jumper (JP1) is shown by the red
box IN FIGURE 1.53.
Move the jumper so it will short the 2 pins of the header. Figure 1.56 shows the location of jumpers JP2 (top center) on
the PCB.
Re-t the PCB into the housing, re t the rear screws and re-t
the front display panel.
Header pins are open – meter power-up only after pressing the on
button on the meter. Figures 1.57 shows the jumper in the open position and located
on one of the pins for storage – no power on pin 9.
Fig 1.57
Header pins are shorted – meter will power up automatically
with the ignition key.
Move the JP2 onto both pins as shown in gure 1.58 -12V is
now available on pin 9.
Fig 1.58
JP1
Fig 1.53
Fig 1.56
Fig 1.54
Fig 1.55
Installation
SI Onboard TruckWeigh™ Manual

20
Install the Meter in the Cab
Installing the Meter
There are two options for mounting the meter:
1. The meter is mounted in a standard single
DIN/ISO radio slot in the dashboard.
2. Bracket mounted.
1. DIN/ISO Slot Mounted.
With this method the display is mounted in a standard single
DIN (Radio) slot in the dashboard.
All the connections are brought to the rear of the slot and
connected to the display. The display is then pushed rmly
into the slot, a click will be felt as the built-in security
bracket engages.
To Remove
To remove the display from a DIN/ISO slot insert the two
removal keys (notch facing downwards) into the two slots on
either side of the display, just far enough to hook the notches
over the fascia.
While pressing removal tools downwards pull the display free
from the DIN slot.
2. Bracket Mounted.
This method uses a U-shaped mounting bracket to hold the meter
to the dashboard or other suitable surface. Smaller brackets
are also required to be installed to either side of the meter. The
meter can be rotated to achieve the best viewing angle.
To Remove
Disconnect the connections, undo the two knobs holding the
bracket to the meter and lift the display and small brackets clear.
Note:
These removal keys DO NOT work in the same manner
as removal keys for the likes of car radios, which when
pushed into their devices actually disengage the locking
mechanism to allow the unit to be removed.
Note:
The meter should be located so it does not obscure the
drivers view.
DIN/ISO Radio slot
73⁄32”
131⁄32”
Fig 1.59
Fig 1.60
Fig 1.61
SI Onboard TruckWeigh™ Manual
Installation