Right Weigh 202-DDG-01 User manual

Interior Digital Load Scale
202-DDG-01
Installation and Operation Manual
Please read carefully before installation

Contents
Specifications: ...................................................................................................................... 2
1.0 Installation and Set-up Overview.................................................................................... 3
2.0 Gauge Installation and Electrical Connection.................................................................. 5
3.0 Airline Installation and Routing ..................................................................................... 8
4.0 System Settings Overview ............................................................................................ 11
4.1 Change Air Sensor Names ........................................................................................ 11
4.2 Enable Estimated Steer Axle..................................................................................... 12
4.3 Change Units (LBS or KG)....................................................................................... 13
4.4 Adjust Backlight and Screen Contrast....................................................................... 14
4.5 Set Calibration Security PIN Code (Optional) ........................................................... 14
4.6 Reset Calibration Data to Factory Default Values ..................................................... 15
5.0 Calibration Overview ................................................................................................... 16
5.1 Gather and Enter Calibration Data........................................................................... 16
6.0 Operating and Weighing Instructions .......................................................................... 18
7.0 Troubleshooting........................................................................................................... 19
8.0 Additional Support ...................................................................................................... 20
Appendix A ....................................................................................................................... 21
Warranty Statement .......................................................................................................... 22

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Specifications:
Operating Temperature: -20° C to +85° C (-4° F to +185° F)
Storage Temperature: -20° C to +85° C (-4° F to +185° F)
Power Supply: 9 VDC to 32 VDC
Units: Pounds (LBS) or Kilograms (KG)
Housing: Black ABS

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1.0 Installation and Set-up Overview
The Right Weigh 202-DDG-01 digital dash gauge is a self-contained monitoring device that
has one internal air pressure sensor. It is designed to monitor one air suspension axle group
that has one Height Control Valve (HCV).
Note: Independent lift axles cannot be considered part of an axle group.
Warning! The 202-DDG-01 digital dash gauge must be mounted inside the vehicles cabin. It
is not designed to withstand harsh external environments.
An axle group can consist of one, two, or three axles.
Single Axle Group Tandem Axle Group
Tri Axle Group

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Installing and setting up the Right Weigh digital gauge involves four major steps.
1. Gauge installation and electrical connection:
This involves mounting the gauge into the vehicle’s dash panel or another
appropriate location within the vehicles cabin.
2. Airline installation and routing:
This involves attaching a new airline that runs from the axle group to the gauge
mounting location.
3. Gauge configuration and feature set-up:
This involves configuring the gauge to the vehicle and setting up individual features.
4. Gauge calibration:
This involves gathering and entering empty and loaded weight values for the axle
group being monitored.

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2.0 Gauge Installation and Electrical Connection
The 202-DDG-01 digital dash gauge is designed to be panel mounted and can be installed in
many different locations within the vehicles cabin.
Step 1:
Choose a location to mount the gauge.
Note: If you choose to mount the gauge in the vehicles dash panel, you will need at
least 3 inches (76 mm) of clearance on the inside of the dash to accommodate the
electrical and airline connections. Remove the dash panel and confirm the available
space before proceeding. If needed, refer to the vehicle owner’s manual or a qualified
technician for detailed instructions on dash panel assembly for your vehicle.
Note: In some cases, the construction of the vehicles dash panel will not allow
installation of aftermarket gauges. Therefore, the gauge must be mounted using an
aftermarket gauge pod or bracket system.
Location options as follows:
a) Any available factory 2-1/16 inch (52 mm)
gauge hole.
b) Remove and replace a factory installed drive
axle air suspension pressure gauge.

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c) Cut a new hole in the dash panel using a 2-
1/16 inch (52 mm) hole saw.
DO NOT cut into the dash panel without
first checking behind it to ensure internal dash
components will not be damaged!
d) Aftermarket gauge pod or bracket system.
Use this option if the vehicles dash panel
cannot accept aftermarket gauges.
Step 2:
Insert the Right Weigh digital dash gauge into the mounting hole.
Hold the gauge in position so the display appears
level on the dash panel or gauge pod/bracket.

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Note: The thickest portion of the gauge bezel
indicates the bottom of the display face.
Step 3:
Screw the gauge nut onto the back of the gauge until it is tight, and firmly holds the gauge
in position.
DO NOT OVER TIGHTEN!
This could cause problems with the display and
touchscreen.
Step 4:
Locate a constant electrical power and ground circuit that is controlled by the ignition
switch. Attach the RED wire to a positive (+) power source and the BLACK wire to a
chassis ground (-) source.

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Note: The required supply voltage must be
between 9 VDC and 32 VDC.
DO NOT connect the power and ground wires
into the existing dimmer switch circuit.
3.0 Airline Installation and Routing
An auxiliary airline must be installed to connect the 202-DDG-01 digital dash gauge to one
air spring from the axle group being monitored.
Note: The 202-DDG-01 gauge cannot be used on an axle group that has two HCVs. To
monitor an axle group that has two HCVs you will need the 202-DDG-02 dash gauge.
Note: For a list of required parts that are not included with the Right Weight digital
gauge, please see Appendix A.
Step 1:
Insert a Street Tee fitting (not included) into the top of the most easily accessible air
spring from the axle group.
Dump the air from the suspension system and
remove the suspension airline and fitting.

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Insert the Street Tee fitting into the top of the air
spring and then reattach the suspension airline into
the Street Tee.
Note: Fitting types and thread sizes will vary
between vehicle makes and models. Make sure to use
matching thread sizes. Additional fittings may be
required.
Step 2:
Using approved fittings that match the thread size of the Street Tee, connect a 1/4 inch
nylon airline (not included) to the Street Tee.
Note: Make sure the airline is long enough to reach
the mounting location of the gauge.
Step 3:
Route the new airline up into the cabin where the Right Weigh digital dash gauge is
mounted.
Make sure to avoid sharp edges and engine components that could become hot.
Secure the airline with zip-ties along the way.

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Step 4:
Insert the new airlines into the push-to-connect
sensor fitting on the back of the gauge.
Step 5:
After the airline is connected to the sensor fittings, air-up the suspension system and
check all fitting connections for air leaks.
Step 6:
Installation is now complete. Carefully re-assemble the dash panel if needed.
The following diagram shows a basic airline schematic:

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4.0 System Settings Overview
The default settings for the Right Weigh digital dash gauge can be changed to make the
information specific to your needs. The following is a list of the settings and feature options.
Review each one and configure the gauge as needed.
4.1 Change Air Sensor Names
To change the default air sensor name, follow these steps:
Step 1:
From the HOME screen, navigate to the “Config Names”.
Press then select “Settings”.
Press twice to advance the screen until “Config Names” appears.
Select “Config Names”.
The “Config Names” screen will display each sensor and its corresponding name in the
form of a button.
Step 2:
Press button to change the air sensor name.

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Step 3:
Select an appropriate name from the list of options.
Press for more options.
Step 4:
To confirm and return to the HOME screen, press three times and once.
4.2 Enable Estimated Steer Axle
The Estimated Steer feature is an approximate steer axle weight based on the relative air
pressure changes in the drive axle’s air suspension system. To enable the estimated steer axle
feature, the gauge air sensor must be connected to the vehicles drive axle suspension system
and that sensor must be named “Drive”. Please refer to sections 4.1 Change Air Sensor Names
to set up and configure the air sensor name.
To turn on the Estimated Steer axle weight feature, follow these screen steps:
Step 1:
From the HOME screen, navigate to the “EstSteer” screen.
Press then select “Settings”
Press once then select “EstSteer”.

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On the EstSteer screen, press the “On” indicator.
Step 3:
To confirm and return to the HOME screen, press twice and once.
4.3 Change Units (LBS or KG)
By default, the gauge will be set to display weight in pounds (LBS). To change the system
units, follow these screen steps:
Step1:
From the HOME screen, navigate to the “Units” screen.
Press then select “Settings”.
Step 2:
Select “English” for LBS or “Metric” for KG.
Step 3:
To confirm and return to the HOME screen, press the twice and once.

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4.4 Adjust Backlight and Screen Contrast
To adjust the backlight brightness and/or the screen contrast, follow these steps:
Step 1:
From the HOME screen, navigate to the “Display Settings” screen.
Press then select “Settings”.
Press “Display Settings”.
Step 2:
Select the display setting to change.
Use your finger on the slide bar to increase or
decrease the backlight brightness and/or the display
contrast.
Step 3:
To confirm and return to the HOME screen, press the twice and once.
4.5 Set Calibration Security PIN Code (Optional)
To protect calibration data from unwanted changes, you can set a security PIN code. This
code will be required in order to get into the Calibration screens. To set a PIN code, follow
these steps:
Step 1:
From the Home screen, navigate to the “Set PIN” screen.
Press then select “Calibration”.
Press until the “Set PIN” option appears.
Select “Set PIN”.
Step 2:

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Then enter a unique PIN code (up to six digits)
Step 3:
Press “Enter” to confirm. Press twice and once to return to the HOME screen.
Note: If a PIN code is forgotten or lost, you will need to contact Right Weigh support
for instruction to reset the PIN code. (See section 8.0 Additional Support for contact
details.)
4.6 Reset Calibration Data to Factory Default Values
In a few rare cases, it might be necessary to reset the calibration data back to the original
factory default values.
To reset the calibration data to the default values, follow these steps:
From the Home screen, press then select “Calibration”. Enter the PIN code if
required. Press until the “Reset Cal Data” option appears. Select “Reset Cal Data”.
Press “YES” to confirm or “NO” to cancel, then press twice and once to return
to the HOME screen.

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5.0 Calibration Overview
To correctly calibrate the Right Weigh digital scale, you will need to enter an empty weight
and a maximum legal loaded weight value for the axle group being monitored. It does not
matter which value you enter first (empty or loaded). However, when a calibration value is
entered the gauge will associate that value with the current air pressure in the suspension
system at that moment. Therefore, it is required that the empty values are entered into the
gauge when the vehicle is empty, and the loaded weight values are entered when the vehicle
is loaded.
Note: When using the Estimated Steer feature, make sure the 5th wheel is in an ideal
position to maximize weight distribution between the drive axle(s) and steer axle. Find
that position and mark it before entering calibration data for the steer axle. The estimated
weight for the steer axle will be reasonably accurate only when the 5th wheel is in the
marked location.
5.1 Gather and Enter Calibration Data
Use the following steps to gather and enter the empty or loaded axle group calibration
weight values.
Note: For best results, make sure the vehicle is full of fuel during the calibration process.
Step 1:
Using a certified in-ground scale, obtain a weight value for the axle group attached to the
Right Weigh load scale. If the estimated steer axle feature is on, get a separate weight
value for the steer axle as well.
Step 2:
Park on a level surface. Shift the transmission to neutral and set the parking brakes. If
you can stay on the in-ground scale, that is ideal.
Step 3:
Chock the wheels to prevent unexpected vehicle movement, then release the parking
brakes.
Step 4:
Make sure the Height Control Valve (HCV) has fully inflated the air bags. If needed,
briefly dump the air from the suspension and allow the HCV to refill the system. (This
may take several minutes depending on the type of HCV.)

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Step 5:
From the “Home” screen, press then select “Calibration”. If required, enter the PIN
code and press “Enter”.
Step 7:
Select the axle group.
Step 8:
Press the “Empty” or “Loaded” button depending on which value you are entering. You
will be asked if you want to enter new calibration data. Press “YES” to continue.
Step 9:
Using the keypad displayed, enter the certified weight for the axle group and press
“Enter”. You will be asked to confirm the weight. If correct, press “YES” to continue.
Step 10:
After you have entered the calibration data for the axle group, press the button once
and the button once to return to the HOME screen.

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6.0 Operating and Weighing Instructions
In order for the 202-DDG-01 digital gauge to provide the most accurate weight values, you
must take care to position the vehicle correctly. For best results, follow these steps.
Step 1:
Park on a level surface. Shift the transmission to neutral and set the parking brakes.
Step 2:
Chock the wheels to prevent unexpected vehicle movement, then release the parking
brakes.
Step 3:
Make sure the Height Control Valve (HCV) has fully inflated the air bags. If needed,
briefly dump the air from the suspension and allow the HCV to refill the system. (This
may take several minutes depending on the type of HCV.)
Step 4:
From the HOME screen, press the button to view the suspension weight values.
Note: You can select different screen views by pressing the button.
Step 5: Press the button to return to the HOME screen.

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7.0 Troubleshooting
Erratic or inaccurate readings could result from the following:
1) The vehicle is NOT parked on a level surface: parking on a sloped or banked surface will
cause the vehicle weight distribution to shift between the axle groups.
2) The vehicle’s brakes are on: when the vehicle brakes are set they could apply additional
pressure or torque on the suspension air bags. This will cause the suspension to have a
different air pressure then what is actually needed to hold up the given weight.
3) The vehicle is parked on an uneven or rough surface: if one or more of the vehicle’s wheels
are in a pothole, that could result in additional pressure or torque on the suspension air bags.
This will cause the suspension to have a different air pressure then what is actually needed to
hold up the given weight.
4) The height control valve (HCV) is malfunctioning and/or broken: if the HCV is not
functioning correctly, then the air pressure applied to the suspension system could be
inconsistent and/or erratic. To test for a HCV problem, follow steps 1 to 5 of the operating
instructions (the vehicle should be loaded). Write down the weight reading from the load
scale. Then, drive the vehicle around the block and return to the same location. Follow steps
1 to 5 of the operating instructions again to get a second reading for the load scale. If the
two readings are significantly different than the HCV might be malfunctioning and/or
broken.
5) There is a significant air leak in the suspension system: if there is an air leak within the
suspension system, this could cause the HCV to refill the suspension at regular intervals to
maintain the vehicles ride height. If there is a significant leak, the gauge display will slowly
decrease in value and then quickly increase in value when the HCV refills the suspension
system.
6) The buttons on the touchscreen do not work: if the buttons on the touchscreen become
inactive, or difficult to use, you will need to re-calibrate the touchscreen. To do this, follow
these steps: 1) Turn the vehicle off. 2) Press your finger on the face of the touchscreen and
hold it there. 3) Turn the vehicle back on. 4) Follow the screen prompts to re-calibrate the
touch-panel. For best results, use a rubber eraser from a standard pencil.