Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com/training
or obtained by calling 715-234-9171 and asking for the training department.
The Cargo Lift Scale is a rugged, dependable cargo lift scale that can withstand many years of repeated use. When
mounted on a forklift, the CLS-M3 saves time and money by allowing you to weigh loads immediately instead of
carrying the load to a floor scale.
This manual is for trained and qualified personnel responsible for installing and servicing the Cargo Lift Scale
(CLS-M3). This manual covers information on the installation and service of the scale carriage, coiled interface
cable to the mobile PC.
1.1Safety
Safety Symbol Definitions:
Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury.
Indicates a potentially hazardous situation that, if not avoided could result in death or serious injury, and
includes hazards that are exposed when guards are removed.
Indicates a potentially hazardous situation that, if not avoided may result in minor or moderate injury.
Indicates information about procedures that, if not observed, could result in damage to equipment or
corruption to and loss of data.
General Safety
Do not operate or work on this equipment unless you have read and understand the instructions and
warnings in the Installation, Operation and Maintenance Manual. Failure to follow the instructions or
heed the warnings could result in injury or death. Contact any Rice Lake Weighing System dealer for
replacement manuals. Proper care is your responsibility.
Failure to heed may result in serious injury of death.
Some procedures described in this manual require work inside the j-box. These procedures are to be performed by
qualified service personnel only.
Take all necessary safety precautions when installing the scale carriage including wearing safety shoes, protective eye
wear, and using the proper tools.
Do not allow minors (children) or inexperienced persons to operate this unit.
Do not operate without all shields and guards in place.
Do not jump on the scale.
Do not use for purposes other then weight taking.
Do not place fingers into slots or possible pinch points.
Do not use any load bearing component that is worn beyond 5% of the original dimension.
Do not use this product if any of the components are cracked.
Do not exceed the rated load limit of the unit.
Do not make alterations or modifications to the unit.
Do not remove or obscure warning labels.
Do not use near water.
Keep hands, feet and loose clothing away from moving parts.
Introduction1
1.2Considerations Before Installation
Net Capacity
A (B + C) - D (E + F)
=
CB
A
D
G
F
Net
Capacity
H
E
K
J
1.2.1Forklift Derating
Capacity Reduction Calculation
While the CLS-M3 will fit most typical forklifts, there are considerations that must be taken into account prior to
installation. Due to the extra weight of the CLS-M3, the net lifting capacity of the forklift is reduced by
approximately 10 percent. Use the formula below to calculate the amount to down-rate the lifting capacity and
determine the net capacity of the forklift.
E + G + H
A = Truck Basic Capacity in poundsB = Inches from front wheel center line to fork face
C = Inches from face to truck rating point (usually 24)D = Weight of scale in pounds
E = Inches from front wheel center line to carriage faceF = Inches from carriage face to scale horizontal center of gravity (HCG)
G = J + K (inches from carriage face to rear face of loadH = Inches from fork face to new truck rating point
J = Thickness of forkK = Thickness of scale
CLS Classes and ID Plates
During the initial sale or installation of the CLS-M3, remind the customer that they must have an updated ID plate
on the forklift stating the new lifting capacity and center of gravity information. This is require3d per OSHA rules
and regulations.
28 inch34 inch38 inch
Vertical enter of gravity (VCG) of scale =8.068.0610.15
Horizontal center of gravity (HCG) of scale =2.092.092.83
Effective thickness (ET) of scale =4.554.556.06
Weight of scale =392420987
2Cargo Lift Scale Series
1.2.2Forklift Battery and CLS Installation
CAUTION
RS-232 Adapter Cable
Coiled cable
connection
Mild steel
construction
Field replaceable load
cell connectors
Calibration
switch
** Type B USB micro connector for
use with Revolution or USB Micro
A connector for firmware updates
Note
Take into consideration that the indicator power source will be connected directly to the battery of the
forklift. Most typical is 12 volts for propane, gas and diesel forklifts.
12 volt systems must have a negative ground so ensure the forklift has a negative ground electrical
system. The CLS will not operate on a positive ground forklift. Refer to the forklift users manual to further
verify grounding requirements.
The standard CLS scales use 9-36V power supply for use on 12 V batteries. If the forklift is an electric system,
make sure to install:
PN 166162 – DC-DC Converter, CLS
PN 166161 – Power Line Filter, CLS (for static protection)
1.3CLS-M3 Power and PC Connection
The CLS-M3 receives power from a mobile PC through the RS-232 port, this eliminates the need for a
Communication/Power box.
2
The iQube2 j-box interfaces to Virtui
allows the operator to display weight and zero the scale.
To calibrate and troubleshoot the CLS-M3, Revolution– software has been installed on the mobile PC as well.
The mobile PC receives data and power (5V on pin 9) from the iQube2 j-box through the Coiled Interface Cable,
PN 156295 and RS-232 adapter cable (PN 156296).
software that has been pre-installed on the mobile PCs operating system. It
Figure 1-1. Coiled Interface Cable and Adapter
1. 4i Qu b e2® J-Box Introduction
The iQube2 j-box sits in an area between the front and back plate of the scale itself providing protection for the
j-box. It comes from the factory pre-wired and no additional work needs to be done to it other than sealing it for
Legal for Trade applications.
Figure 1-2. Two-Channel J-Box on CLS-M Scale
After successful installation (Section 2.0) and calibration (Section 5.0), replace the cover on the scale assembly
and secure with bolt and washer.
Introduction3
2.0Scale Base Installation
WARNING
CAUTION
This section describes procedures for installing the Cargo Lift Scale base.
Take all necessary safety precautions when installing the scale carriage, including wearing safety shoes
and protective eyewear, and using the proper tools, which are listed in Section 2.4.
The Cargo Lift Scale is shipped from the factory with the scale already calibrated and all settings stored in the jbox. Minimal adjustments and calibration might be necessary once the scale is installed onto the forklift. Those
calibration steps are contained in Section 4.6 on page 36.
2.1Before Installation
Before installing the CLS on a forklift, the forklift should be in good operating condition for optimal weighing
accuracy. Look for the following items prior to installing the CLS onto a forklift:
•Inspect the forks for any damage.
•Check the locking pin on the forks for proper function.
•Check and adjust the lift chain so the heel of the forks have 1/2 to 1 inch of clearance from the floor when the
carriage is down and the mast is vertical.
•The slot for the center pin should be clear of grease and debris.
•The top cleats of the forklift rest on the top of the scale and should remain clear of grease and debris that
could alter the scale’s performance.
The power/communication box will be connected directly to the battery of the forklift. The CLS scale works with
9-36 VDC power source.
All systems must have a negative ground.
2.2Tools Needed to Install the CLS-M onto the Forklift
Once the forklift is deemed in good mechanical and operating condition, use the following tools to remove it from
its shipping pallet and install onto the forklift.
ToolSizePurpose of Tool
Allen wrench4 mmFor service only, to remove j-box
Cresent wrench2 in adjustableFor adjusting the shim bolts and jam nuts.
Tin snips or band cuttersNATo cut the plastic banding surrounding the CLS while on the pallet.
Torque wrench w/ 1/2" Allen1/2 in To tighten the cleats to 125 ft-lb.
Electric grinderFor grinding the center pin if necessary and the mounting bolts.
Wrench7/16 inTo connect power/communication box to mounting plates.
Wrench & socket9/16 inTo connect mounting plates to forklift carriage.
USB Type “A” to Type “B” Cable6 ft minUse with laptop for access to Revolution software for diagnostics,
calibration and displayed weight.
LevelNATo perform angle zero calibration.
Fish tape6 ft minRoute power cable to forklift battery.
Crimping toolNABattery connections.
Table 2-1. Recommended Tools for Unpacking and Installation of the CLS-M
4Cargo Lift Scale Series
2.3Unpacking
Hardware
component
boxes
Note
The CLS is shipped upright on a sealed pallet with one or two scales per pallet, as shown in Figure 2-1.
Figure 2-1. CLS-M Packaging
Upon receipt of the shipping pallet, inspect it for any visible signs of damage. Immediately after unpacking,
visually inspect the contents to ensure all components are included and undamaged. The shipping pallet should
contain the following:
•One or two scale carriage assemblies with cover plate
•Hardware component boxes, which include:
• Two cleats with four bolts
• One coiled interface cable
• One power cable and hardware for battery connection
• One power/communication box
• One mounting kit for power/communication box with hardware
To ensure that all products received from the manufacturer are in good shape upon arrival, it is recommended
to fully inspect all contents and properly fill out the bill of lading.
If any parts were damaged in shipment, notify the shipper immediately.
2.3.1Unpacking a One Scale Configuration
The scale is shipped in an upright position as illustrated in Figure 2-2. The upright position allows for ease of
installation. The power/communication box and accessories are located in a hardware component box.
1. Clip plastic band holding hardware component box in place and remove box.
2. Remove protective wood piece from the front of the scale.
3. Remove the front pallet support.
4. Clip the remaining plastic bands that are encircling the scale.
5. Remove the protective wood piece which protects the front of the scale.
Scale Base Installation5
Protective wood
covering
Wood shipping pallet
Hardware
component box
Step 1: Clip plastic band securing hardware
component box
Step 2: Remove protective wood covering
Hardware component box
plastic banding
Exploded view of components
Protective wood
covering
Front
pallet
Plastic banding securing
scale to pallet
Step 3: Remove front pallet support
Step 4: Clip remaining plastic bands
Step 5: Remove protective wood
Protective wood
covering
Scale is now ready for installation
Scale
Front pallet support
Figure 2-2. Scale Component Parts on Shipping Pallet for One Scale
6Cargo Lift Scale Series
2.3.2Unpacking a Two Scale Configuration
WARNING
The scales are shipped in an upright position as illustrated in Figure 2-3. The upright position allows for ease of
installation. The power/communication box and accessories are located in a hardware component box.
When installing from a two scale configuration, complete all of steps for scale one before clipping plastic
bands securing second scale to the shipping pallet.
1. Clip top plastic bands.
2. Clip plastic band securing cardboard boxes to shipping pallet.
3. Remove the cardboard boxes.
4. Clip plastic bands from scale one.
5. Remove protective wood covering for scale one.
Scale one is ready for installation.
6. Once scale one has been installed, clip plastic bands from scale two.
7. Remove protective wood covering for scale two.
Scale two is now ready for installation.
Scale Base Installation7
Hardware
component boxes
Exploded view of components
Protective wood
covering
Wood shipping pallet
Plastic
banding
Step 1: Clip top plastic bands
Step 2: Clip plastic band to release hardware
component boxes
Step 3: Remove hardware component boxes
Step 4: Clip plastic bands from first scale
Step 5: Remove protective wood covering for first
Scale one is ready for installation.
DO NOT clip the plastic band from scale
two until scale one is installed
Step 6: Clip plastic bands from scale two.
Step 7: Remove protective wood covering for
second scale.
Scale two is ready for installation.
Protective wood
covering
Scale
Plastic
banding
Protective
wood
covering
Figure 2-3. Scale Component Parts on Shipping Pallet for Two Scales
8Cargo Lift Scale Series
2.4Scale Base Installation
Top cleat
location
Shim bolt
hole location(s)
Anti-shift
centering pin
CAUTION
Note
WARNING
Note
Use the following steps to install the scale base to the forklift.
Figure 2-4. Anti-shift Centering Pin, Shim Bolts and Top Cleat Locations (One Scale Configuration Shown)
Verify that the shim bolts are flush with the back plate of the scale. Not doing so will place the entire scale
out of alignment when attaching it onto the forklift and will make it difficult to make final adjustments
once the scale is mounted onto the forklift.
1. Making sure the forks are removed from the forklift, move the forklift in close to the pallet and scale.
2. Ensure the anti-shift centering pin on the scale assembly is aligned with the center notch on the forklift
carriage.
The scale’s centering pin should be aligned with the middle notch of the forklift carriage. Verify that the
centering pin is adjusted so that the pin is located well within the center notch area of the carriage. The
centering pin should not touch the bottom of the notch on the original carriage, as this will cause side to side
tilting of the scale. The outside top cleats provide support to the scale assembly and the centering pin only
helps to position the scale on the forklift carriage. The centering pin should not bear any weight. If it does, the
use of a grinder to grind down the centering pin will help remedy that.
3. Tilt the mast forward slightly to catch the scale assembly.
4. Carefully and slowly raise the scale carriage slightly so the top cleats (cleat location shown in Figure 2-4)
5. Tilt the mast back to secure the connection and raise the scale to shoulder height.
6. Attach the bottom cleats to the bottom of the scale assembly (see Figure 2-5 for bottom cleat location), so
7. Torque the bottom cleat retaining bolts to 125 ft-lb.
8. Adjust the shim bolts so there is a minimal clearance between the bottom cleats and the scale carriage of
of the scale hook onto the forklift carriage. If they do not hook, push the scale toward the forklift as it is
being raised.
that the lip of the cleat is behind the scale carriage.
0.020-inch thickness. This can be measured by using the included feeler gauge.
Failure to properly torque the bottom plate retaining bolts may result in bodily harm or damage to
equipment.
Failure to adjust shim bolts to proper clearance of 0.020 inches may result in binding, poor accuracy or
improper fit of attachment to forklift.
Scale Base Installation9
Bottom cleat
retaining bolts
Shim bolts
Bottom cleat
Illustration shown is
with part of the
flexure removed to
show shim bolt
location.
Insert a feeler gauge to measure a
0.020-inch thickness between bottom
cleat and forklift carriage.
Scale carriage
Forklift carriage
3/16-inch gap max, for installation on
forklift to prevent side shifting.
9. Upon successful installation and calibration verification, seal the carriage j-box and load cell quick
disconnects for Weights and Measurements approval.
10Cargo Lift Scale Series
Figure 2-5. Bottom Cleat Location and Assembly
2.5Connect the Coiled Interface Cable to J-Box
Loop Clamp Assembly
PN 167250
Bolt
Washer
Scale Cover
Assembly
Washer
Nut
Coiled Cable
Loop
Clamp
Loop Clamp Assembly
PN 150720
Used with Scale Cover
Assembly PN 97118
Used with Scale Cover
Assembly PN 162340
Note
Last notch open
Fork
Figure 2-7. Fork Attachment
Note
1. Loosen the bolt holding the cover to the scale assembly and remove cover. See Figure 2-6.
2. Assemble loop clamp kit to the coiled interface cable.
3. Route the coiled cable through clips on backside of carriage toward middle. For proper coiled cable
4. Push the coiled interface cable through the hole in the scale and connect it to the j-box. See Figure 2-6.
5. Position the scale cover assembly and the loop clamp assembly to the scale and secure with the bolt and
2.6Install Forks onto Scale Assembly
The forks need to be installed onto the scale assembly.
1. Align a fork to the center of the scale
2. Lift the carriage slightly to set the fork,
3. Repeat process for other fork,
Figure 2-6. Connecting the Coiled Cable
routing, tighten clips. Set the other end of the cable aside until the power/communication box is installed
(See Section 3 on page 14).
washer.
After successful installation (Section 2.0 and Section 3.0) and calibration (Section 5.0), replace the cover on
the scale assembly and secure with bolt and washer.
assembly making sure it is over
the top of the assembly.
and then slide the fork to the side of the scale.
Let it stop in the 2nd notch from the end
and latch it in place.
sliding it the opposite direction on the scale.
For accurate weighing, it is best to leave forks at the second notch from the outside edge of the scale.
Scale Base Installation11
3.0Cable Connections
Coiled interface
cable
Cable tie
Cable tie
Note
Figure 3-1. Coiled Interface Cable
3.1Routing Coiled Interface Cable
Special care should be taken when routing the coiled interface cable. To ensure that the cable is installed properly
and away from situations that could cause it harm use the following steps:
1. The cable was connected to the load cell j-box during the scale installation. Retrieve the cable and route to
the mobile PC from the forklift scale.
2. Routing of cable will vary depending on forklift style. The preferred route for a single stage forklift is
through the center of the mast, up the front/right upright, to the area where the mobile PC is mounted.
Figure 3-2. Signal Cable Located Between the Scale and the Mobile PC
3. Secure with cable ties at the scale, at the top of the mast and several other locations to keep it securely in
place.
4. Slowly and carefully extend the mast to all positions to confirm that the cable isn’t pulled too tight or that
there are no pinch points along the way.
5. Check for proper signal cable clearance as the side shifter (if used), is moved back and forth.
When routing cables do not obstruct the view of OSHA labels on the forklift.
12Cargo Lift Scale Series
3.2Pre-installed RS-232 Adapter Cable
RS-232 Adapter Cable
The RS-232 adapter cable (coiled cable to 9-pin RS-232) may be pre-installed
from the factory onto the mobile PC.
1. Ensure the mobile PC is OFF
2. Connect the coiled cable to RS-232 adapter cable, secure with tie wraps
to reduce accidental damage.
3.3Connecting the Coiled Interface Cable/RS-232
Adapter Cable to Mobile PC
1. Ensure the mobile PC is off.
2. Connect female M16 connector to coiled cable.
3. Connect DB-9 connector to PC.
4. Attach cable to forklift cage with the wraps to reduce accidental damage.
3.4Check Scale for Accuracy
For this application, the customer has pre-installed the Revolution software on the mobile PC. Follow the
instructions provided by the customer for accessing Revolution.
Cable Connections13
4.0Revolution® Interface to CLS-M
Revolution is a tool to display weight, diagnostics and calibration (if required) of the CLS-M3 scale using a
®
Windows
based computer.
4.1Connect Scale to Revolution
1. Open the Revolution program on the computer.
Figure 4-1. Revolution Screen at Open
2. Select File/New from the main toolbar.
3. Select the
4. Press
CLS-M Forklift option listed below for your model.
OK.
14Cargo Lift Scale Series
Figure 4-2. Open Revolution to CLS-M3 Module
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