Right Weigh Load Scales

Specifications & Overview

The Right Weigh 201-EDG-01(B) digital load scale features one internal air pressure sensor. It is designed to monitor a single air suspension axle group (single, tandem, or tridem drive axle group, or trailer axle group) that utilizes one Height Control Valve (HCV).

Diagrams:

• Single Axle Group: Depicts a single axle with one Height Control Valve (HCV) connected via air lines.
• Tandem Axle Group: Shows two axles with a single Height Control Valve (HCV) managing the air suspension for both.
• Tri Axle Group: Illustrates three axles connected to a single Height Control Valve (HCV) for air suspension control.

Important Note: The 201-EDG-01(B) model is not compatible with axle groups that have two HCVs. For such configurations, the 201-EDG-02(B) digital load scale is required.

Technical Specifications

• Operating Temperature: -22° F to +185° F (-30° C to +85° C)
• Storage Temperature: -40° F to +185° F (-40° C to +85° C)
• Power Supply: 9 VDC to 32 VDC (Switched)
• Units: Pounds (LBS) or Kilograms (KG)
• Housing: High impact polycarbonate blend
• Display: 0.8" LCD, sunlight readable

Drop Axle Configuration

This load scale can monitor an axle group with an air ride lift axle, provided the lift axle's air bags are controlled by the same height control valve as the other axles in the group. Setup for this configuration requires using the Multiple Calibration Mode. Independent regulated lift axles cannot be considered part of an axle group.

Estimated Steer Axle

When used to monitor the drive axle group, this scale can also provide an estimate of the steer axle weight. Refer to the Estimated Steer Mode section for detailed instructions.

Dimensional Overview:

• Unit Dimensions: The scale unit has approximate dimensions of 114mm (4.5") width, 114mm (4.5") height, and 208mm (8.25") depth.
• Display Unit: Features a 0.8" LCD screen.
• Buttons: Includes POWER ON/OFF, MENU/ENTER, CALIBRATE (C) HIGH, CALIBRATE (C) LOW, and UP/DOWN ARROW buttons.

Scale Installation and Electrical Connections

The 201-EDG-01 scale is designed for external mounting on a truck or trailer, but it must be housed within a protective enclosure. A protective box and mounting bracket are supplied with the 201-EDG-01B model. Select a mounting location that is easily accessible and protected from potential damage (e.g., from forklift posts or tires).

Important Warning: Avoid mounting the scale directly to the chassis or any main beam unless explicitly approved by the vehicle manufacturer, as this may void the warranty.

1. Mount the provided bracket in the chosen location and attach the protective box using the supplied hardware.
2. Release air pressure from the suspension system. Locate and remove the suspension air line fitting from the top of an air bag connected to the Height Control Valve.
3. Insert a street tee fitting into the air bag. Ensure the fitting's thread size and type match the vehicle suspension's air bag fitting. Reinstall the original suspension air line and fitting into the street tee. Consult Appendix A for recommended hardware.
4. Connect a new 1/4" air line and fitting to the street tee fitting for use with the Right Weigh load scale.
5. Route the new 1/4" air line from the street tee fitting to the scale's mounting location. Connect the air line to the push-to-connect fitting on the back of the load scale. Secure the air line along its path to the truck or trailer using zip ties.
6. Re-pressurize the suspension system and inspect all air fitting connections for leaks.
7. Connect the RED wire from the scale to a SWITCHED positive (+) power source (do not connect directly to the battery). Connect the BLACK wire to chassis ground (-). The required power supply voltage is between 9 and 32 volts DC.

Note: All electrical connections must be insulated from weather to prevent damage to the scale and wiring. Refer to Appendix B for guidance on wiring insulation.

Calibration

Proper operation of the 201-EDG-01(B) load scale requires calibration in both empty and loaded states. The scale learns to associate the air pressure within the suspension system with the weight entered during calibration. Calibration must be performed once when the vehicle is empty and again when it is loaded for each axle group being monitored.

1. Empty Calibration Point

1. With the vehicle empty, obtain the weight of the specific axle group(s) from a certified in-ground scale.
2. Park the vehicle on a level surface. Shift the transmission to neutral and engage the parking brake. Chock the wheels to prevent movement, then release the parking and service brakes.
3. Ensure the Height Control Valve (HCV) has fully inflated the air bags. If necessary, briefly release air from the suspension and allow the HCV to refill the system. This process may take several minutes depending on the HCV type.
4. Turn on the Right Weigh load scale using the ON/OFF button. Press and hold the C LOW button until the "C/L" symbol appears on the display.
5. Use the UP and DOWN arrow buttons to adjust the displayed value until it matches the weight recorded on your scale ticket for the axle group.
6. To save the calibration data, press and hold the C LOW button until the "C/L" symbol disappears.

Important Calibration Note: When calibrating, weigh the entire axle group being monitored. Do not use gross weight, tare weight, or the weight of a single axle from a tandem setup. For loaded calibration, ensure the vehicle's weight is as close as possible to its maximum legal limit.

2. Loaded Calibration Point

1. With the vehicle fully loaded, obtain the weight of the specific axle group(s) from a certified in-ground scale.
2. Park the vehicle on a level surface. Shift the transmission to neutral and engage the parking brake. Chock the wheels to prevent movement, then release the parking and service brakes.
3. Ensure the Height Control Valve (HCV) has fully inflated the air bags. If necessary, briefly release air from the suspension and allow the HCV to refill the system.
4. Turn on the Right Weigh load scale using the ON/OFF button. Press and hold the C HIGH button until the "C/H" symbol appears on the display.
5. Use the UP and DOWN arrow buttons to adjust the displayed value until it matches the weight recorded on your scale ticket for the axle group.
6. To save the calibration data, press and hold the C HIGH button until the "C/H" symbol disappears.

Once both empty and loaded calibrations are complete, the scale is ready for use. Refer to the troubleshooting section of this manual if you encounter issues with calibration data entry.

Operating and Weighing Instructions

For the most accurate weight readings, proper vehicle positioning is crucial. Follow these steps for optimal results:

1. Park the vehicle on a level surface. Shift the transmission to neutral and set the parking brake.
2. Chock the wheels to prevent unexpected vehicle movement, then release the parking and service brakes.
3. Ensure the Height Control Valve (HCV) has fully inflated the air bags. If necessary, briefly release air from the suspension and allow the HCV to refill the system.
4. Turn on the Right Weigh load scale using the ON/OFF button.
5. Adjust the suspension or the load itself until the scale displays a weight value below your legal limit.
6. Turn off the Right Weigh load scale using the ON/OFF button.

• The display will automatically turn off after 60 minutes of inactivity.
• To switch units from pounds (LBS) to kilograms (KG), press and hold the UP arrow button, then press the MENU button.

Scale Operating Modes

The 201-EDG-01(B) scale supports several operating modes. Only one mode can be active at a time. Changing the operating mode will reset all calibration data to factory defaults, requiring recalibration.

• Average Mode (AVG): This is the default mode for the scale.
• Estimated Steer Mode Average (S-AVG): This mode is used to monitor the drive axle group weight and simultaneously estimate the steer axle weight based on the weight distribution ratio between the drive axle group and the steer axle.
• Multiple Calibration Mode (4CAL): This mode allows for storing up to four sets of calibration data. It is beneficial for axle groups with integrated air ride lift axles using the same HCV, or for suspensions operating under various conditions.

Changing Scale Modes:

1. With the scale turned OFF, press and hold both the UP and DOWN arrow buttons simultaneously. Then, press the ON/OFF button. Release all three buttons. The scale will display the currently active mode.
2. Press the UP arrow button to cycle through the available configuration modes. To confirm your selection, turn the scale OFF by pressing the ON/OFF button.

Estimated Steer Mode - Average (S-AVG)

In Estimated Steer Mode, the 201-EDG-01(B) scale, when installed on a tractor with a single height control valve to monitor the drive axle group, can also estimate the steer axle weight. The display will show a small number in the lower left corner: '1' for the estimated steer axle weight, '2' for the drive axle group weight, or '1 & 2' for the combined weights.

Use the MENU button to switch the display between the axle groups.

Estimated Steer Mode - Average - Calibration Steps

Calibration in this mode requires obtaining separate empty and loaded weights for both the drive axle group and the steer axle from a certified in-ground scale. Ensure the truck and trailer are on flat, level ground with brakes off and wheels chocked during calibration and weighing. Refer to pages 8 and 9 for general calibration procedures.

Diagram: Illustrates a truck with a spring suspension steer axle, a drive axle group, and a trailer axle group, showing the scale connected to the drive axle's air suspension via a Height Control Valve and air tank.

1. Empty Calibration Point

1. Obtain separate empty weight values for the steer axle and the drive axle group from an in-ground scale.
2. Press the MENU button until the scale displays "axle group 1". Press and hold the C LOW button until the "C/L" symbol appears.
3. Use the UP and DOWN arrows to adjust the displayed value to match your scale ticket for the steer axle. Press and hold the C LOW button to save the value until the "C/L" symbol disappears.
4. Press the MENU button to switch the display to "axle group 2" and repeat the calibration process for the drive axle group.

2. Loaded Calibration Point

1. After the truck is fully loaded, obtain separate loaded weight values for the steer axle and the drive axle group from an in-ground scale.
2. Press the MENU button until the scale displays "axle group 1". Press and hold the C HIGH button until the "C/H" symbol appears.
3. Use the UP and DOWN arrows to adjust the displayed value to match your scale ticket for the steer axle. Press and hold the C HIGH button to save the value until the "C/H" symbol disappears.
4. Press the MENU button to switch the display to "axle group 2" and repeat the calibration process for the drive axle group.

Multiple Calibration Mode (4CAL)

The 201-EDG-01(B) digital load scale supports a mode that stores four sets of calibration data. This feature is particularly useful for axle groups with integrated air ride lift axles sharing the same HCV, or for suspensions that operate under a variety of conditions.

Calibration

The calibration process is identical to that of the Average mode. However, this mode allows you to switch between four distinct calibration sets using the MENU button. It is essential to calibrate both empty and loaded states for each calibration set you intend to use.

Operation

Use the MENU button to navigate between the saved calibration sets. The number displayed in the lower right corner of the screen indicates which calibration set is currently active.

Diagrams:

• Configuration 1 with 1 HCV: Shows an axle group configuration.
• Configuration 2 with 1 HCV: Depicts another axle group configuration.
• Scale Displays: Examples of scale readings showing "20,800 LBS" and "31,850 LBS" with button prompts.

Security PIN Code

A security PIN code can be set for the 201-EDG-01(B) to prevent unauthorized tampering. The PIN must be entered to modify calibration values or to change the PIN itself. It is recommended to keep a copy of the PIN for future reference. Once a PIN is set, it can be changed but cannot be removed.

Setting a PIN Code:

1. With the gauge OFF, press and hold both the C LOW and C HIGH buttons. Then, press the ON/OFF button. Release all three buttons.
2. Press the MENU button. The display will show "00000". If the display shows "- - - - -", it indicates a PIN is already set. Enter a new 5-digit PIN using buttons 1, 2, 3, and 4. Press the MENU button again to save the PIN.

Changing Your PIN Code:

1. With the gauge OFF, press and hold both the C LOW and C HIGH buttons. Then, press the ON/OFF button. Release all three buttons.
2. Press the MENU button. The display will show "- - - - -". Enter the previous PIN code. If the entered code is correct, the display will show "Good".
3. Press the MENU button, and enter the new 5-digit PIN using buttons 1, 2, 3, and 4. Press the MENU button again to save the new PIN.

Overweight Warning

The scale's display can be configured to flash as a visual alert when the weight exceeds a predetermined threshold. For instance, you can set it to flash whenever the axle group weight surpasses 33,500 pounds.

Setting an Overweight Warning:

1. With the scale turned ON, press and hold both the C HIGH and C LOW buttons. After approximately 3 seconds, the "C/H" symbol will appear.
2. The display will then show the current warning value. The default setting is "0", which disables the overweight warning feature, meaning the display will not flash regardless of the weight.
3. Use the UP and DOWN arrow buttons to set the desired warning weight threshold. Press and hold the C LOW and C HIGH buttons simultaneously to save the setting.

Note: Setting the warning value to "0" will disable the overweight warning feature.

Troubleshooting

Erratic or Inaccurate Readings

• Vehicle Not Parked on a Level Surface: Parking on sloped or banked surfaces can cause weight distribution to shift between axle groups, leading to inaccurate readings.
• Vehicle's Brakes are On: Engaged vehicle brakes can apply additional pressure or torque to the suspension air bags, resulting in air pressure readings that do not accurately reflect the actual weight.
• Vehicle Parked on an Uneven or Rough Surface: If one or more wheels are in a pothole, it can create additional pressure or torque on the suspension air bags, causing the air pressure reading to be inconsistent with the actual weight.
• Height Control Valve (HCV) Malfunctioning or Broken: A faulty HCV can lead to inconsistent or erratic air pressure applied to the suspension system. To test for an HCV issue, record a weight reading, drive the vehicle a short distance, return to the same location, and take another reading. Significant differences between the two readings may indicate an HCV malfunction.
• Significant Air Leak in the Suspension System: Air leaks can cause the HCV to repeatedly refill the suspension to maintain ride height. A significant leak may result in the scale display showing a slow decrease in value, followed by a rapid increase when the HCV replenishes the air.

Scale Does Not Power On:

• Not Connected to a Switched Power Source (9-32 Volts): A poor connection causing voltage to drop below 9 volts will prevent the scale from powering on. Test the power source with a voltmeter.
• Scale Connected Directly to Battery: The scale remains active even when the display is off. To reset, disconnect and reconnect the power source, wait 10 seconds, and then attempt to turn the display on again.
• Polarity is Incorrect: Ensure the RED wire is connected to the positive (+) terminal and the BLACK wire to the negative (-) terminal.

Scale Display is Blinking:

• Current Weight Above Alarm Limit: With the scale ON, press and hold the '1' and '2' buttons simultaneously. The display will show the alarm limit weight. To clear the alarm, set this value to '0' using the down arrow, then hold '1' and '2' again until the display clears.

Cannot Change Calibration Data:

• Scale Has an Active User-Defined Security PIN: If a passcode is set, it must be entered before calibration data can be modified. The scale will display "CodE", and the previously set 5-digit PIN must be entered.

Scale Will Not Calibrate Low:

• Air Pressure in System is Not Changing: To enter low calibration mode, the 201-EDG-01B load scale requires a measurable change in air pressure compared to when it was calibrated high. Ensure you calibrate high when your trailer is near its legal limit, and calibrate low when the trailer is empty. Verify that the air line is connected directly to an air bag and not to the main air supply or air brake system.

Appendix A - Additional Parts

The following is a list of suggested additional parts required for air line installation. This list may not include all necessary parts for your specific vehicle. Consult your Right Weigh dealer for optional installation kits.

• Approximately 20 to 30 feet (6 to 9 meters) or more of 1/4" rigid air line.
• Street tee fitting: The thread size should match the air bag fitting (e.g., 1/4" NPT or 3/8" NPT).
• Male straight air line fitting for 1/4" air line, with a thread size compatible with the street tee fitting.
• 20 or more zip ties.

Diagrams:

• 1/4 Inch Air Line: Image of a coil of black 1/4 inch air line.
• Street Tee Fitting: Illustration of a street tee fitting.
• Male Straight Fitting: Illustration of a male straight fitting.
• 20 or More Zip-Ties: Image of several zip ties.

Appendix B - Wiring Insulation

It is critical that all wiring connections are made watertight. Connections that are not watertight can allow moisture to travel along the wire strands into the scale, causing permanent damage to the electronic components.

Heat shrinkable splices are included with the 201-SK installation kit.

• Use a wire crimp tool (not provided) to crimp each wire end into its respective connector.
• Apply heat using a heat gun or torch to the connector until it shrinks completely around each wire end. Be careful not to burn the wire jacket.
• After all connections are made, thoroughly wrap the cable connections with electrical tape, heat shrink tubing, or other suitable environmental protection.

Diagrams:

• After crimping and heat shrinking: Shows wires properly crimped and heat-shrunk.
• Final protected connections: Illustrates cable connections wrapped with tape or tubing.

Warranty Statement

Right Weigh is dedicated to providing quality products that function as intended and stands behind its workmanship. The industry-leading warranty reflects this commitment. Products manufactured or sold by Right Weigh, Inc. are warranted to be free from significant defects in material and workmanship for a period of three (3) years from the date of purchase. During this warranty period, and within the specified boundaries, Right Weigh, Inc. will, at its sole discretion, correct the product problem or replace the product.

This warranty does not cover:

• Improper application, installation, incorrect wiring, or operation outside of approved product specifications.
• Accidents, faulty suspension parts, or power surges.
• Inadequate maintenance or preparation by the buyer or user.
• Abuse, misuse, or unauthorized modification.
• Acts of God, including lightning strikes, floods, fire, or earthquakes.

Right Weigh, Inc. assumes no responsibility or liability for any loss or damages resulting from the use of its products.

In no event shall Right Weigh, Inc. be liable for direct, indirect, special, incidental, or consequential damages (including loss of profits or loss of time) arising from the performance of a Right Weigh, Inc. product. In all cases, Right Weigh, Inc.'s liability is limited to the original cost of the product in question. Right Weigh, Inc. reserves the right to make improvements in design, construction, and appearance of products without prior notice. Right Weigh, Inc. may, at its sole discretion, discontinue support, warranty, or repair services for products deemed obsolete or for which repair parts are no longer available. No employee or agent of Right Weigh, Inc. is authorized to modify the terms of this warranty without the express written permission of Right Weigh, Inc.

Return Policy & Repairs

Return Policy and Authorization

Before returning any product, please obtain a Return Merchandise Authorization (RMA) number by contacting Customer Service at 888-818-2058 or by emailing rwls@rwls.com. Include the RMA number and the reason for the return with the product. Shipping costs for returns must be prepaid by the customer. For your protection, items must be packed carefully to prevent damage during shipment and insured against possible loss or damage. Right Weigh, Inc. is not responsible for damage resulting from careless or insufficient packing or loss in transit.

An RMA number must be obtained by the original purchaser before any product can be returned. Only new, unused products are eligible for return. Installed, used, damaged, modified, or customized products cannot be returned for credit. Credit will be issued to the original purchaser following evaluation by Right Weigh, Inc.

Repairs/Replacements

An RMA number is required for all product returns. Right Weigh, Inc. will evaluate returned products at no charge. If Right Weigh, Inc. determines the returned product is under warranty, it will be repaired or replaced at no charge, or if unrepairable, replaced with a functionally equivalent product whenever possible. Right Weigh, Inc. will return the product at its expense via a shipping method (carrier at Right Weigh, Inc.'s sole discretion) that is equal to or faster than the method used by the customer. Products or parts not covered by warranty will be repaired or replaced at the customer's expense, upon their authorization. Right Weigh, Inc. will return repaired products at the customer's expense via a shipping method (carrier at Right Weigh, Inc.'s sole discretion) that is equal to or faster than the method used by the customer.

Notes

Support Contact Information

For additional support, please contact:

• United States, Canada, and All Other Countries:
  Right Weigh, Inc.
  Tel: (888) 818-2058
  www.rwls.com
  rwls@rwls.com
• Australia and New Zealand:
  Smart Truck Solutions
  Tel: 0418 622840

Document Information:

• Model Number: PP-003-0001 Rev H
• Publication Date: January 2018
• Manufacturer: Right Weigh, Inc.
  Hillsboro, Oregon, USA
  www.rwls.com
• ©2015-2018 Right Weigh, Inc. All rights reserved.