Rice Lake CLS420 User manual

CLS-420
420 Cargo Lift Scale
Version 1.15
Technical Manual
PN 96483 Rev D

An ISO 9001 registered company
© Rice Lake Weighing Systems. All rights reserved.
Rice Lake Weighing Systems®is a registered trademark of
Rice Lake Weighing Systems.
All other brand or product names within this publication are trademarks or
registered trademarks of their respective companies.
All information contained within this publication is, to the best of our knowledge, complete
and accurate at the time of publication. Rice Lake Weighing Systems reserves the right to
make changes to the technology, features, specifications and design of the equipment
without notice.
The most current version of this publication, software, firmware and all other product
updates can be found on our website:
www.ricelake.com

Contents
Contents i
1.0 Introduction..................................................................................................................................... 1
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Considerations Before Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1 Forklift Derating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.2 Forklift Battery and CLS Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 420 Digital Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.2 LED Annunciators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Indicator Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Accepting Weight Data to the Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7 iQube2 Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.0 Installation .................................................................................................................................... 10
2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.1 Unpacking One Scale Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.2 Unpacking Two Scale Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 Before Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.3 Tools Required for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.4 Scale Base Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.5 Install Forks onto Scale Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.6 Connect the Coiled Interface Cable to J-Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.7 Mounting the Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.7.1 Mount Kit and Indicator Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.8 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.8.1 Power Indicator with the Forklift Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.8.2 Power Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.8.3 Power Cable to Battery Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.8.4 Route the Load Cell Coiled Interface Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.8.5 Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.9 Wireless Battery Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.10 Battery Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.11 Charging the Lithium-Ion Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.12 Calibrating the Lithium-Ion Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.13 Lithium-Ion Battery Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.14 General Precautions - Lithium ion Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.0 CLS-420 Calibration and Configuration....................................................................................... 27
3.1 Navigating Through Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.1.1 Editing Numerical Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2 CLS-420 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.1 Devices used for Lifting of Calibration Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.2.2 Front Panel Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3 CLS-420 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.1 Front Panel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.2 Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.3.3 Format Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.4 Calibration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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.
© Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice. Rice Lake Weighing Systems is an ISO 9001 registered company.
June 13, 2017

ii CLS-420 Technical Manual
Contents
3.3.5 Accumulate Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.4 EDP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.4.1 EDP Command Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.4.2 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.5 Continuous Output (Stream) Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.6 Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.7 Regulatory Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.8 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.9 CLS-420 ABF Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.9.1 Wi Fi Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.9.2 Installed WLAN Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.9.3 Reset Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.9.4 Power the Carriage Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.9.5 Special Matchport Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.9.6 420 Core Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.10 ASCII Character Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.11 Front Panel Display Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.12 Conversion Factors for Secondary Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.0 Parts and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.1 Daily Inspection Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.2 Cargo Lift Scale Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.2.1 Load Cell Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.2.2 iQube2 Junction Box Assembly (PN 167261), 28'' and 34'' Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.2.3 Junction Box with Quick Disconnects (PN 130826). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.2.4 Protective Angle with Battery Box Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.3 Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4.3.1 CLS-420 Indicator (PN 162310) 5 Pin Wired with Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4.3.2 CLS 420 Indicator, 10 Pin Connector, Used With iQube (98413). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.3.3 Mount Assembly for CLS-420 Indicator (PN 162310) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.3.4 Mount Assembly for CLS-420 Indicator (PN 98413) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
4.4 CLS-420 Indicator CPU Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
4.4.1 Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.5 NEMA 4X Polycarbonate Junction Box Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4.5.1 Junction Box Board Replacement – Two Board Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4.5.2 Junction Box Board Replacement and Wiring – One Board Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.5.3 Junction Box Board Replacement and Wiring – Quick Connect Style . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.6 IQube2 Junction Box Maintenance/Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
4.6.1 iQube2 Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.6.2 iQube2 PCB Board Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.6.3 iQube2.3 Cross References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.7 Load Cell Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.1 Required Tools for Replacing a Load Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.2 Load Cell Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.7.3 Forklift Flexure Troubleshooting - 28" and 34" Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.7.4 CLS-420 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
4.8 LED Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.0 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
5.1 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
5.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.0 CLS-420 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars

1
1.0 Introduction
The CLS-420 is a rugged, dependable cargo lift scale that can withstand many years of repeated use. When
mounted on a forklift, the CLS-420 saves time and money by allowing loads to be weighed immediately instead of
carrying the load to a floor scale.
This manual is intended for use by individuals responsible for installing the cargo lift scale along with the 420
digital weight indicator (CLS-420). This manual includes information on the installation and maintenance of the
scale carriage, signal cable installation (if applicable), and the installation, configuration, and calibration of the 420
digital weight indicator.
While the functionality remains the same for a standard 420 digital weight indicator, there are certain menu
choices in the configuration section of this manual specific to this application.
The CLS-420 Operator Card, PN 96484 included with this manual, provides basic operating instructions. Please
leave the operator card with the CLS-420 when installation and configuration is complete.
Manuals can be viewed or downloaded from the Rice Lake Weighing Systems website at
www.ricelake.com/manuals
Warranty information can be found on the website at www.ricelake.com/warranties
1.1 O v e rvi e w
The scale carriage comes in three different sizes including: 28, 34 and 38 inches.
On board Features
Features of the basic cargo lift scale include:
• NTEP approved – Class III, 5,000 lb, 1:1000; Class II forklift, with 16" cleat style carriage (28'' & 34'' only)
• Non-NTEP – Class III, 8,000 lb, 1:1000 forklift with cleat style carriage (38'' only)
• Two stainless steel load cells
• Mechanical overload protection
• Flexure plates with bolts welded into place
• Cover plate
• Welded centering pin
•Viewport
• Two-channel iQube2®junction box
• Wired or wireless communication
Note
Figure 1-1. Fork Lift with CLS-420

2CLS-420 Technical Manual
1.2 Sa f e t y
Safety Signal Definitions:
Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury.
Includes hazards that are exposed when guards are removed.
Indicates a potentially hazardous situation that, if not avoided could result in serious injury or death.
Includes hazards that are exposed when guards are removed.
Indicates a potentially hazardous situation that, if not avoided, could 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 this manual has been read and all instructions are
understood. Failure to follow the instructions or heed the warnings could result in injury or death.
Contact any Rice Lake Weighing Systems dealer for replacement manuals.
Failure to heed may result in serious injury or death.
Some procedures described in this manual require work inside the indicator enclosure. 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.
Ensure feet, legs and other body parts are not under the scale when lowering.
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.
Keep hands, feet and loose clothing away from moving parts.
DANGER
WARNING
CAUTION
Important
WARNING

3
1.2.1 Battery Disposal
When using Lithium-ion batteries, be sure to observe the following precautions for disposal as stated in the
material safety data sheet regarding lithium-ion batteries.
Figure 1-2. Material Safety Data Sheet - Lithium Ion Batteries

4CLS-420 Technical Manual
1.3 Considerations Before Installation
1.3.1 Forklift Derating
Capacity Reduction Calculation
While the CLS-420 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-420, the net lifting capacity of the forklift is reduced by
approximately 10%. Use the formula below to calculate the amount to down-rate the lifting capacity and determine
the net capacity of the forklift.
CLS Classes and ID Plates
During the initial sale or installation of the CLS-420, 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 required per OSHArules
and regulations.
1.3.2 Forklift Battery and CLS Installation
Take into consideration that the indicator power source will be connected directly to the battery of the
forklift. 12 volts is most typical for propane, gas and diesel forklifts.
Ensure the forklift has a negative ground electrical system; 12 volt systems must have a negative ground.
The CLS will not operate on a positive ground forklift. Refer to the forklift users manual to further verify
grounding requirements.
Standard CLS scales use a 9-36 V 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, 18-75 VDC 0 12V output
• PN 166161 – Power Line Filter, CLS (for static protection)
If a peripheral is connected, consider grounding it directly to the CLS-420 indicator.
A = Truck Basic Capacity in pounds B = 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 face F = Inches from carriage face to scale horizontal center of gravity (HCG)
G = J + K (inches from carriage face to rear face of load H = Inches from fork face to new truck rating point
J = Thickness of fork K = Thickness of scale
28 inch 34 inch 38 inch
Vertical enter of gravity (VCG) of scale = 8.06 8.06 10.15
Horizontal center of gravity (HCG) of scale = 2.09 2.09 2.83
Effective thickness (ET) of scale = 4.55 4.55 6.06
Weight of scale = 392 420 987
Net Capacity A (B + C) - D (E + F)
E + G + H
=
CB
AD
G
F
Net
Capacity
HE
K
J
CAUTION
CAUTION

5
1.4 420 Digital Indicator
The 420 digital indicator is a single-channel serial weight indicator housed in a NEMAType 4X/IP66-rated
stainless steel enclosure. The indicator front panel consists of a large (1.8'', 44.5 mm), 6-digit, 7-segment LED
display and 21 keys.
Standard features of the CLS-420 include:
• ON/OFF switch to increase battery life and cycle power to the junction box
• Configurable digital inputs (2) and outputs (2)
• Electronic Data Processing (EDP) port dedicated to communication with the two-channel iQube2 in forklift
applications.
• A printer port for full duplex RS-232 or active transmit only and 20 mA current loop communications up to
38400 bps
• NTEP certified
• 9-36 VDC input or 10-60 VDC input - VDC range of new power supply
• The setpoint key on the indicator can be used in wireless versions to display battery hours remaining.
1.4.1 Front Panel
Figure 1-3 illustrates the 420 LED annunicators, keypad, and normal mode key functions.
Figure 1-3. 420 Front Panel
There are five symbols shown above the navigation keys (which represent up, down, enter, left, right). In setup
mode, the keys are used to navigate through menus, select digits within numeric values and increment/decrement
values.
The 420 has an off/off switch for the processor functions. Before opening the unit, ensure the 420 is
disconnected from the forklift battery power source.
1.4.2 LED Annunciators
The 420 display uses a set of six LED annunicators to provide additional information about the value being
displayed:
•Gross and Net annunciators are lit to show if the displayed weight is in gross or net.
• Center of zero ( ).Annunciator lights when the scale is zeroed (gross weight is within 0.25 graduations
of zero).
• Standstill ( ). Indicates when the scale is at standstill or within the specified motion band. Some
operations, including tare functions and printing, can only be done when the standstill symbol is displayed.
•lb and kg annunciators indicate the units associated with the displayed value: lb=pounds, kg=kilograms.
lb
kg
Count
Gross
Net
DISPLAY
TARE SETPOINT TIME/DATE
POWER
I/O
23 4 5
7 8 9 06
CLR
ZERO GROSS
NET
TARE
ENTERMODE SAMPLE
UNITS PRINT
Navigation
Keys
Power Key
WARNING
0

6CLS-420 Technical Manual
• The displayed units can also be set to short tons (tn), metric tons (t), ounces (oz), grams (g), or NONE (no
units information displayed). The lb and kg LEDs function as primary and secondary units annunciators for
some combinations of primary and secondary units. If neither primary nor secondary units are lb or kg the lb
annunciator is lit for primary units, the kg annunicator is lit for secondary units.
•Table 1-1 shows which annunciators are used for all combinations of configured primary and secondary
units. Examples:
a.If the primary unit is pounds (lb) and the secondary unit is kilograms (kg), the lb LED is lit for
primary units, kg for secondary units.
b.If the primary unit is pounds (lb) and the secondary unit is short tons (tn), the lb LED is lit for
primary units, kg for secondary units. There is not an LED for short tons, so the kg LED is used for
secondary units annunciator.
c.If the primary unit is short tons (tn) and the secondary unit is pounds (lb), the lb LED is lit for
primary units (tn), and kg is lit for secondary units (lb). Because there is no LED for short tons, the
lb and kg LEDs are used as primary and secondary units annunciators.
1.4.3 Modes of Operation
The 420 has four modes of operation, as listed below.
Weigh Mode
Weigh mode is the default mode of the indicator. The indicator displays gross or net weights as required, using the
LED annunciators described in Section 1.4.2 on page 5 to indicate the scale status and the type of weight value
displayed. Once configuration is complete and a legal seal is affixed to the back of the indicator, this is the primary
mode in which the 420 can operate.
Setup Mode
Most of the procedures described in this manual, including configuration and calibration, require the indicator to be
in setup mode.
To enter setup mode, remove the setup screw, insert a small screwdriver and press the setup switch once. The
indicator display changes to CONFIG.
Test Mode
Test mode provides a number of diagnostic functions for the 420 indicator. Like setup mode, test mode is entered
using the setup switch. See Section 3.6 on page 39 for more information about entering and using test mode.
Test mode is intended for factory and technician use only.
Front Panel Setup Mode
Hold the UNITS key for three seconds to enter front panel setup mode. Use front panel setup to change setpoint and
to set the time and date.
Entering the front panel setup mode can be done without breaking the seal.
Primary Unit
Secondary Unit
lb kg oz gtn tnone
lb lb / lb lb / kg lb / oz lb / g lb / kg
kg kg / lb kg / kg kg / oz kg / g lb / kg
oz oz / lb oz / kg oz / oz oz / g oz / kg
g g / lb g / kg g / oz g / g g / kg
tn lb / kg lb / kg lb / oz lb / g lb / lb lb / kg lb / kg
tlb / kg lb / lb lb / kg
none lb / kg lb / kg lb / lb
Table 1-1. Units Annunciators, Showing Primary / Secondary LEDs Used for All Configurations
Note
Note