Rice Lake CW-90 User manual

CW-90/90X
Checkweigher
Firmware Version 1.06
Technical Manual
PN 105942 Rev D

Contents 1
Contents
1.0 Introduction..................................................................................................................................... 1
1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Keypad Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Tare Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.6 Annunciators LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.7 Bar Graph LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Installation ...................................................................................................................................... 6
2.1 Unpacking and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Making Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Enclosure Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Load Cell Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6 Wire Specifics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.7 Cable Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7.1 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7.2 Digital I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.8 Enclosure Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.9 Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.10 Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.11 Installing Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.12 Replacement Parts and Assembly Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.0 Configuration ................................................................................................................................ 15
3.1 Menu Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Audit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3 Calibration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4 Setup Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4.1 SCALE Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4.2 FEATUR Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4.3 FEATUR Menu, REGULA / INDUST Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.4.4 Serial, PFORMT, DIG I/O, VERS Submenus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.5 Test Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.6 Time and Date Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.7 ACCUM Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.8 BRIGHT Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.9 ID Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.0 Calibration .................................................................................................................................... 36
4.1 Front Panel Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.2 EDP Command Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.3 Revolution® Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.4 More About Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.4.1 Adjusting Final Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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. Version 1.06
December 17 , 2014

2CW-90/90X Checkweigher
5.0 Operation....................................................................................................................................... 39
5.1 Range Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1.1 Value Set: Keyed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1.2 Value Set: Push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.2 Target Weight Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.2.1 Value Set: Keyed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.2.2 Value Set: Push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.3 Target Percent Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.3.1 Value Set: Keyed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3.2 Value Set: Push . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.4 IDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.4.1 Setting an ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.4.2 Using a Stored ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.4.3 WeighVault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.5 Negative Checkweighing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.0 Serial Commands ......................................................................................................................... 48
6.1 The Serial Command Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.1.1 Key Press Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.1.2 ID Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.3 Reporting Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.4 Clear and Reset Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.5 Parameter Setting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.6 Normal Mode Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.1.7 Unique Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.2 Custom Stream Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.0 Print Formatting ............................................................................................................................ 56
7.1 Print Formatting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.2 Customizing Print Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.1 Using the EDP Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.2 Using the Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.3 Using Revolution®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.0 WLAN Option Card......................................................................................................................... 59
8.1 WLAN Card Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.0 Appendix ....................................................................................................................................... 60
9.1 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.2 Using the XE EDP Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.3 Status Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.3.1 Using the P EDP Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.3.2 Using the ZZ EDP Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.4 Continuous Output (Stream) Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.5 Digital Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.5.1 DIGFLxParameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.5.2 DFSENS and DFTHRH Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.5.3 Setting the Digital Filter Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.5.4 Audit Trail Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.6 Regulatory Mode Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.7 Updating CW-90/90X Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
CW-90/90X Limited Warranty ................................................................................................................... 70
For More Information ................................................................................................................................ 71
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.

Introduction 1
1.0 Introduction
This manual is intended for use by qualified service technicians responsible for installing and servicing the
CW-90/CW-90X checkweighing scale.
Manuals can viewed or downloaded from the Rice Lake Weighing Systems website at
www.ricelake.com/manuals.
1.1 Sa fet y
Safety Symbol Definitions:
WARNING
Important
CAUTION
WARNING
Indicates a potentially hazardous situation that, if not avoided could result in serious injury or death, 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.
Safety Precautions
Do not operate or work on this equipment unless you have read and understand the instructions and
warnings in this manual. 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. Proper care is your
responsibility.
Some procedures described in this manual require work inside the indicator enclosure. These procedures
are to be performed by qualified service personnel only.
General Safety
WARNING
Failure to heed may result in serious injury of death.
DO NOT allow minors (children) or inexperienced persons to operate this unit.
DO NOT operate without all shields and guards in place.
DO NOT step on the unit.
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.
Before opening the unit, ensure the power cord is disconnected from the outlet.
Keep hands, feet and loose clothing away from moving parts.

2CW-90/90X Checkweigher
1.2 Ov e rv i ew
The CW-90/CW-90X is a high-speed digital weight indicator and scale base programmed to compare weight
readings with predetermined tolerance limits defining an “accept” band.
If the current weight reading is within the acceptable range, the green “ACCEPT” LED is illuminated. If the
current weight reading is less than the acceptable range, one or more of the red “UNDER” segments is illuminated.
If the current weight reading is greater than the acceptable range, one or more of the yellow “OVER” segments is
illuminated. 
Features include:
• Large .8” (20.3 mm) LED display with “under,” “accept,” and “over” bands
• Full numeric keypad (CW-90 only)
• Four configurable digital inputs/outputs
• Two independent communication ports (2) full duplex, (1) unidirectional active 20 mA current loop
1.3 Operating Modes
The CW-90/CW-90X has two modes of operation:
Normal (Weighing) Mode
Normal mode is the “production” mode of the indicator. The indicator displays the gross or net weight, depending
on whether a tare has been entered. LED annunciators indicate the type of weight value.
Menu mode
Most of the procedures described in this manual, including configuration and calibration, require the indicator to be
in Menu mode.To enter Menu mode, press the MENU key (if the Audit jumper is in the “ON” position).The
indicator displays “AUDIT.” 
If the Audit jumper is in the “OFF” position, remove the large fillister head screw from the bottom of the enclosure.
Insert a screwdriver into the access hole and press the setup switch once to enter Menu mode.
1.4 Keypad Functions
Key Function
Turns the CW-90/CW-90X unit on/off.
Note
If the PC jumper is set to SW, the POWER button must be used to turn the unit on and off. If
the PC jumper is set to ON, the unit will automatically power on when it’s plugged in and the
only way to turn it off is to unplug power.
Enters Menu mode, allowing configuration if the Audit jumper is in the “ON” position. Also used as an “escape”
key in Menu mode.
Sets the current gross weight to zero, provided the amount of weight to be removed or added is within the
specified zero range and the scale is not in motion. The zero band is defaulted to 1.9% of full scale, but can be
configured for up to 100% of full scale.
Note
1.9% is required for legal for trade applications.
Switches the weight display to an alternate unit. The alternate unit is defined in the Setup menu, and could be
kg, g, lb, oz, or lb/oz. Conversions of the weight reading, the Tare value, the Over value, and the Under value
occur when the unit of measure is changed with the Units key.
Note
When working in lb/oz, any entered values need to be entered in ounces. This applies when
entering over, under, target, and tare values.
Sends “on-demand” serial information out the serial port, provided the conditions for standstill are met. PRINT
will be displayed while the unit prints.
Table 1-1. Keypad Functions

Introduction 3
Figure 1-1. CW-90 Numeric Keypad
1.5 Tare Recall
When a stored tare is displayed, the Gross and Net annunciators will be turned off and the PT annunciator will be
turned on. To display a stored tare,
1. Press the MENU key.
2. Press the TARE key.
The tare value will be displayed for 10 seconds. If there is no tare in the system, pressing the TARE key will
have no effect.
Performs one of several predetermined Tare functions dependent on the mode of operation selected in the
TAREFN parameter (See Section 3.4.1 on page 18). To view a stored tare, see Section 1.5 on page 3.
OVER
Allows the display of the current “over tolerance” value, or allows setting the “over tolerance” value.
UNDER
Allows the display of the current “under tolerance” value, or allows setting the current “under tolerance” value.
TARGET
When the MODE parameter is set to TARGWT or TARG% (see Section on page 19), this key is used to acquire
a weight value and assign it as the desired “target” value. The CW-90/CW-90X then computes the final
over/under values using the target value and the over/under tolerance settings defined during the weighing
operation.
ID
Selects a particular over/under/tare/units register set to be retrieved and used.
ENTER
Used to accept entries and move down to below parameters in Menu mode.
CW-90 only.
Clear key. Used to backspace on entries
Numeric keypad
(see Figure 1-1)
CW-90 only.
Used to enter values directly.
Key Function
Table 1-1. Keypad Functions (Continued)

4CW-90/90X Checkweigher
1.6 Annunciators LEDs
Table 1-2. Annunciator LEDs
LED Description
0
Zero (Center of Zero) LED
While in gross weight display mode, this LED indicates that the current displayed weight reading is within
+/-0.25 display divisions of the acquired zero, or is within the center of zero band.
When in the net weight display mode, it indicates that the current net weight reading is within +/-0.25 display
divisions of the center of net zero. A display division is the resolution of the displayed weight value, or the
smallest incremental increase or decrease that can be displayed or printed.
G/B LED
Gross weight mode (or Brutto in OIML mode)
N LED
Net weight display mode.
T LED
Indicates that a tare has been acquired and stored by the system.
PT LED
Indicates that a preset tare weight has been keyed in or entered via the EDP serial port.
Displays which unit of measure is being used.
% LED
Percent mode
kg LED
Kilograms
g LED
Grams
lb LED
Pounds
oz LED
Ounces

Introduction 5
1.7 Bar Graph LEDs
The bar graph LEDs provide you with a fast way of determining if a container is too heavy (OVER), too light
(UNDER), or is within an acceptable weight range (ACCEPT).
ACCEPT
UNDER OVER
Greatly over
Moderately under
Slightly under
Acceptable weight
Moderately over
Slightly over
Greatly under
Figure 1-2. Bar Graph LEDs
You can enable the UNDER and OVER lights to act as a graph as illustrated in Figure 1-2, or to appear as one a
solid bar regardless to how far over/under a weighment is. They can also be disabled so no illumiation is provided.
This is done by accessing the Feature menu (see Section 3.4.2 on page 23).
Red Segments
When illuminated, this indicates an underweight condition; the container weighs less than the lowest acceptable
value. The leftmost red segments indicate that the container weight is far below the acceptable weight band (greatly
under); the rightmost segments indicate that the container weight is almost in the acceptable weight band, but still
under (slightly under). Illuminating the center segments indicates middle-ground, or moderately under.
Green Segment
Indicates an acceptable value. When lit, the green segment (one solid bar) indicates that the container weight is
within the actual acceptable band of weight limits.
Yellow Segments
When illuminated, this indicates an overweight condition; the container weighs more than the highest acceptable
value. The rightmost yellow segments indicate that the container weight is far above the acceptable weight band
(greatly over); the leftmost segments indicate that the container weight is almost in the acceptable weight band, but
still over (slightly over). Illuminating the center segments indicates middle-ground, or moderately over.

6CW-90/90X Checkweigher
2.0 Installation
This section contains instructions on unpacking and assembly, leveling, making power connections, load cell
wiring, wiring standard serial port, optional network communications, wiring optional digital outputs, optional
backup battery operation, board diagrams, and power-up sequence.
1
6
9
42
5
7
10 Torque
Pattern 8
3
Torqued screws may become less
tight as the gasket is compressed
during torque pattern, therefore a
second torque is required using the
same pattern and torque value.
Important
Important
Do not pick up the scale by the “spider” assembly which supports the platter. Lifting by the spider may
damage the load cell. Lift the scale from under the base to move it. If the rear panel of the indicator is
removed, align the gasket holes carefully to prevent driving a screw through the gasket and causing a
leak. Tighten screws to 15 in/lbs (1.7 N-m) in alternating patterns shown Figure 2-1.
Figure 2-1. Indicator Back Panel Screw Tightening Sequence
2.1 Unpacking and Assembly
The indicator head and support column or stand are shipped detached from the scale platform.
1. Remove all assemblies from the shipping carton. Notice that the head and scale platform are joined by a
load cell cable. This cable is correctly wired to the load cell terminal in the indicator head. Do not pull with
excessive force on the connections at either end of this cable.
2. If mounting the head onto a column, remove the platter from the scale platform and set aside.
3. Invert the platform to access the column mounting holes on the rear and bottom of the platform.
4. Position the column over the four mounting holes. Install (2) 1/4-20 x 3/4” cap screws and (2) lock washers
in mounting holes on bottom side of the platform. Install (2) 1/4-20 x 1-3/4”cap screws, (2) lock washers,
and (2) column supports in mounting holes on rear of platform. Install coupling nuts, counter bored end
first, onto threaded stem of rubber feet. Install feet onto bottom side of the column.
5. Turn the CW-90/CW-90X upright and replace the platter on the platform.
6. Attach indicator to the column with the two knobs and nylon washers provided. Position nylon washers
between indicator enclosure and column mounting holes.
Indicator
Column
Column Support
Lock Washer
Cap Screw 1/4-20NC X 3/4
Foot
Coupling Nut
Cap Screw
1/4-20NC x 1-3/4
Lock Washer
Figure 2-2. Mounting Column to Scale Platform

Installation 7
2.2 Leveling
Select a location for the CW-90/CW-90X that is reasonably level and free of vibrations and air currents. Adjust the
four corner feet on the base and refer to the bubble level on the inside frame. The base should not rock and the feet
should have solid contact with the surface. If using a column, adjust the two column feet until they make solid
contact with the support surface.
Note
Ensure the nut on each foot’s bolt is secured flush against the scale base.
2.3 Making Power Connections
The power source used for the CW-90 must be properly grounded to an acceptable earth ground. If the indicator is
remotely mounted, the platform must be separately grounded from the chassis ground screw located on the bottom
of the platform. Connect this screw with 18 gauge wire to the same earth ground system as the AC power source.
Failure to ground the base may cause static buildup and incorrect weights.
Note
The CW-90 must be installed near an easily accessible power outlet to allow for quick disconnect in case of
emergency.
2.4 Enclosure Disassembly
The indicator enclosure must be opened to connect cables for load cells, communications, and digital
inputs/outputs.
WARNING
Before opening the unit, ensure the power cord is disconnected from the power outlet. The power outlet
must be located near the indicator to allow the operator to easily disconnect power to the unit.
Ensure power to the indicator is disconnected, then place the indicator face-down on an antistatic mat. Remove the
screws holding the backplate to the enclosure body, then lift the backplate away from the enclosure and set it aside.
2.5 Load Cell Wiring
On all complete units (indicator head and base), the load cell has been wired to the indicator’s CPU load cell
terminal at the factory. If you have purchased just the indicator head, you must wire the load cell. 
Wire the cable to the CPU board’s J1 connector as shown in Table 2-1. Leave any excess cable outside of the
indicator head during installation
Table 2-1. J1 Pin Assignments
J1 Pin Function
1+ Signal
2- Signal
3+ Sense
4- Sense
5+ Excitation
6- Excitation
Note
If using a 4-wire connection, set JP1 and JP2 to ON. If using a 6-wire connection, set JP1 and JP2 to OFF.
2.6 Wire Specifics
Wires connecting to J1, J2, J3, or J4 should adhere to the following specifications:
Table 2-2. Wire Specifications for Connectors
Wire Range Wire Strip Length
28~12 AWG stranded or solid wire 5~6 mm (3/16” ~ 1/4”)

8CW-90/90X Checkweigher
2.7 Cable Grounding
Except for the power cord, all cables routed through the
cord grips should be grounded against the indicator
enclosure. Do the following to ground shielded cables.
Insulated cable
Foil (silver side out) Grounding clamp
Shield wire (cut) Length of foil before folding
back on cable insulation
Cut insulation here
for foil-shielded cables
Braid
Cut insulation here
for braided cables
NOTE: Install lockwashers
first, against backplate,
under grounding clamp
Figure 2-3. Grounding Clamp Attachment for
Foil-Shielded and Braided Cabling
• Use the lockwashers, clamps, and kep nuts
provided in the parts kit to install grounding
clamps on the enclosure studs adjacent to cord
grips. Install grounding clamps only for cord
grips that will be used; do not tighten nuts.
• Route cables through cord grips and grounding
clamps to determine cable lengths required to
reach cable connectors. Mark cables to remove
insulation and shield as described below:
• For cables with foil shielding, strip insulation and
foil from the cable half an inch (15 mm) past the
grounding clamp (see Figure 2-3). Fold the foil
shield back on the cable where the cable passes
through the clamp. Ensure silver (conductive)
side of foil is turned outward for contact with the
grounding clamp.
• For cables with braided shielding, strip cable
insulation and braided shield from a point just past the grounding clamp. Strip another half inch (15 mm)
of insulation only to expose the braid where the cable passes through the clamp (see Figure • on page 8).
• Finish installation using cable mounts and ties to secure cables inside of indicator enclosure.
2.7.1 Serial Communications
Wire the serial communications cables to J2, which is Port 1 (5-wire RS-232 port). J3 is Port 2 (RS-232 and 20
mA). Connect communications cables to J2 and J3 as shown in Table 2-3.
Use cable ties to secure serial cables to the inside of the enclosure.
Port 1 supports full duplex RS-232 communications only; Port 2 provides either active 20 mA output or duplex
RS-232 transmission. Both ports are configured using the SERIAL menu. See Section 3.4.4 on page 29.
Connector Pin Signal Port
J2 1 Ground 1
2Ground
3Tx
4Rx
5DTR
6RTS
J3 1 20mA+ 2
2Ground
3Tx
4Rx
5CTS
6RTS
Table 2-3. J2 and J3 pin assignments

Installation 9
2.7.2 Digital I/O
The Digital I/O can be configured as either digital inputs or digital outputs as determined by the DIO menu (see
Section 3.4.4 on page 29). The inputs are active (on) with low voltage (0 VDC) and can be driven by TTL or 5V
logic without additional hardware. Use the DIG I/O menu (see Section 3.4.4 on page 29) to configure the digital
inputs. LEDs on the CPU board light when digital inputs are active (see Figure 2-4).
Digital outputs are typically used to control relays that drive other equipment. Outputs are designed to sink not
source, switching current. Each output is a CMOS circuit, capable of sinking 24 mA when active. Digital outputs
are wired to switch relays when the digital output is active (low, 0 VDC) with reference to 5 VDC supply. LEDs on
the CPU board light up when the digital outputs are active (see Figure 2-4).
Screw Screw
Screws Screw
DIO LEDs
Figure 2-4. Digital I/O lights and screw locations
Table 2-4. J4 Pin Assignments (Digital I/0)
Connector Pin Signal
J4 1 +5V
2Ground
3DIG I/O 1
4DIG I/0 2
5DIG I/O 3
6DIG I/O 4
2.8 Enclosure Reassembly
Once the cabling is complete, position the backplate over the enclosure and reinstall the screws. Use the torque
pattern shown in Figure 2-1 on page 6 to prevent distortion. Torque to 15 in/lbs (1.7 N-m).
2.9 Board Removal
If you must remove the CW-90/CW-90X CPU board, use the following procedure:
1. Disconnect power to the indicator. Remove backplate as described in Section 2.4 on page 7.
2. Disconnect power supply cable from connector J9 on the CW-90/CW-90X CPU board.
3. Disconnect the wires at the following connectors: J1, J2, J3, J4.
4. There are two boards: the CPU board and the keypad display board. Remove the five screws connecting
the CPU board (see Figure 2-4), then lift the board out of the enclosure.
To replace the CPU board, reverse the above procedure. Be sure to reinstall cable ties to secure all cables inside the
indicator enclosure.

10 CW-90/90X Checkweigher
2.10 Battery Replacement
CAUTION
Risk of explosion if battery is replaced with incorrect type. 
Dispose of batteries per manufacturer instructions.
The lithium battery on the CPU board maintains the real-time clock and protects data stored in the system RAM
when the indicator is not connected to AC power. Data protected by this battery includes time and date, IDs, and
configuration information. If any data is lost, the indicator configuration can be restored from the PC. Watch for the
low battery warning on the LCD display and periodically check the battery voltage on the CPU board. Batteries
should be replaced when the indicator low battery warning comes on, or when battery voltage falls to 2.2 VDC.
Life expectancy of the battery is 10 years. Use Revolution to store a copy of the configuration before attempting to
replace the battery.
For best results, replace the battery while in weigh mode and with AC power applied. use care not to bend the
battery retaining spring.
2.11 Installing Option Cards
Note
CAUTION
Option cards are not hot-pluggable. Disconnect power cord entirely before installing option cards.
Ethernet port is not suitable for connection to circuits used outside the building and is subject to lightning or
power faults.
Each option card is shipped with installation instructions specific to that card. For specific instructions on the
WLAN card, refer to Section 8.0 on page 59. 
The general procedure for all option cards is:
1. Disconnect power cord from the indicator.
2. Remove the backplate as described in Section 2.4.
3. Install the plastic standoffs in the standoff holes (shown as black-shaded circles in Figure 2-5).
4. Carefully align the option card connector with the J5 connector on the CPU board.
5. Press down firmly to seat the option card in the CPU board connector.
6. Make connections to the option card as required. Use cable ties to secure loose cables inside the enclosure.
When installation is complete, reassemble the enclosure as described in Section 2.8.

Installation 11
Figure 2-5. CW-90/CW-90X CPU Board
Table 2-5. Jumper Descriptions
Jumper Description
JP1/JP2 Jump excitation to sense. If using a 4-wire load cell cable, leave JP1
and JP2 on. If using a 6-wire load cell cable, take JP1 and JP2 off.
Default is ON.
JP3/JP4 Used when upgrading firmware. The jumpers should be on when
upgrading firmware and off when the update is complete.
PC Power control. If the jumper is set to SW, the POWER key can be used
to turn the unit on/off. If set to ON, the unit will power on when
plugged in and can only be powered off by unplugging.
JMP1 If set to Audit ON, calibration and configuration can be acessed
through the front keypad. If set to Audit OFF, calibration and
configuration can only be accessed by removing the screw on the
base of the unit and pressing the Setup switch with a screwdriver.
Default is Audit ON.
Note
If the RESET button on the CPU board is pressed, the indicator will perform a reboot.

13
30
31
22
21
8518
17
15
34 28
27
19 16
26 24
25
9
7
6320
4
10
12 11
10
10
11
11
1
33
29
2
14
32 23
12 CW-90/90X Checkweigher
2.12 Replacement Parts and Assembly Drawings
Figure 2-6. CW-90/CW-90X Assembly and Components

Item No. Part No. Description (Quantity)
1Enclosure 1
2Mounting Plate, Display 1
314621 Nut, Kep 6-32NC HEX 2
485202
85203
Power Cord Assy, 120VAC
Power Cord Assy, 230VAC
1
568600 Cord Grip, PG11 1
668599 Seal Ring, Nylon PG11 1
768601 Nut, PG11 1
858983 Cable Grip, SL-7 w/Nut 3
916892 Label, Earth Ground 1
10 15134 Washer, Lock NO 8 Type A 3
11 14626 Nut, Kep 8-32NC HEX 3
12 45043 Wire, Ground 4in W/No. 8 1
13 104914
104915
Overlay, Membrane Switch (CW-90)
Overlay, Piezo (CW-90X)
1
14 105850 Bracket, Power Supply 1
15 76556 Power Supply, Switching 1
16 14822 Screw, Mach 4-40NC x 1/4 6
17 14825 Screw, Mach 4-40NC x 1/4 4
18 105976 Cable Assy, Power Supply 1
19 102354 CPU 1
19 105741 Display 1
20 69291 Battery, 3v Coin Lithium 1
21 42640 Screw, Mach 1/4-28NF X 1/4 1
22 44676 Washer, Bonded Sealing 1
23 Backplate 1
24 84388 Gasket, Backplate 420 1
25 88733 Vent, Breather Sealed 1
26 88734 Nut, Breather Vent 1
27 14862 Screw, MACH 8-32NCx3/8 4
28 45042 Washer, Bonded Sealing SST 4
29 29635 Stand, Tilt SST 1
30 103988 Washer, Nylon .52 ID 2
31 103610 Knob, Black 1/4-20 2
32 53307 Label 1
33 53308 Label 1
34 16861 Label, Warning High 1
-- 105945 Parts Kit, CW-90/90X 1
-- 107476 Bench Scale Foot
-- 105555 Coupling Nut for Feet and Overload Stops
Installation 13
Figure 2-7. CW-90/CW-90X Replacement Parts

Table 2-6. CW-90X Load Cells
Scale Capacity Load Cell Part Number
5 lb 107174
10 lb 107174
25 lb 107175
50 lb 107176
100 lb 107177
Table 2-7. CW-90 Load Cells
Scale Capacity Load Cell Part Number
5 lb 107756
10 lb 107757
25 lb 107758
50 lb 107759
100 lb 107760
11.24
9.50
10.02
10.02
4x .281
.38
3.75
2.01 6.00
3.00
3.75
3.12
6.00
8.57
4.00
14 CW-90/90X Checkweigher
Figure 2-8. CW-90/CW-90X Dimensions

Configuration 15
3.0 Configuration
To set up and configure the CW-90/CW-90X checkweigher, you will either use the Menu key on the front panel or
press the setup switch on the bottom of the indicator. The indicator is defaulted at the factory with the audit trail
jumper (JMP1) in the ON position, allowing configuration access by pressing the Menu key. Pressing the Menu key
will take you to the Audit menu selection. Use the ID ( ) and TARGE T () navigation keys to move to other menu
selections. Use the UNDER ( ) and OVER ( ) navigation keys to enter and exit menu selections, respectively.
AUDIT
Only displayed if
turned on
from Setup menu
Only displayed if
turned on
from Setup menu
CALIBR SETUP TEST EXIT IDACCUM BRIGHTT&D
Figure 3-1.
Table 3-1. Menu Menu Summary
Menu Function
AUDIT Audit Trail Displays the legally relevant (LR) firmware version, configuration count, and calibration count.
CALIBR Calibrate Calibrates the scale.
SETUP Setup Accesses setup options for the scale, features, serial output, print format, digital inputs and outputs,
and displays the version number.
TEST Test Performs a basic test on the A/D, digital inputs and outputs, communication ports, RAM, and
keypad.
EXIT Exit Exits Configuration mode and returns to the weigh screen.
T&D Time & Date Allows you to view and change time and date.
ACCUM Accumulator Displays the current accumulator value.
BRIGHT Brightness Adjusts display intensity on a scale from 0 (dimmest) to 7 (brightest).
ID ID Allows you to setup or edit IDs.
Menu Mode Navigation Structure
3.1 Menu Navigation
Once you have entered the menus, you can use the front panel buttons to navigate. Note the looped menu structure
shown in Figure 3-1. This provides a shortcut for accessing the rightmost menu items by navigating to the left, and
vice-versa for the opposite side of the menu. This shortcut also holds true for sub-menu navigation.
OVER UNDER MENU
ID ENTER
TARGET
Move UP/
Increment
Value
Move DOWN/
Decrement
Value
BackspaceEnter/Exit
Configuration
Menu
Enter VALUE/
Move DOWN
Move LEFT/
Previous
Move RIGHT/
Next
Figure 3-2. Front Panel Key Functions in Menu Mode
Note
During calibration, the ENTER key acts as a data entry confirmation key. It also acts as an EXECUTE key and
accepts the value upon successful calibration. On the CW-90, the ZERO or CLR key can be used for a
backspace.
Various keys are used as directional keys to navigate through the menus (see Figure 3-2). The ID ( ) and TARGET
() keys scroll left and right (horizontally) on the same menu level; OVER ( ) and UNDER ( ) move up and down
(vertically) to different menu levels. These keys have a directional symbol indicating its menu navigation function.
The ENTER key has the same function as UNDER ( ) when navigating the menu; either will move down to access
sub-categories of a main menu item. When adding or editing data using the CW-90X, the OVER ( ) and UNDER ( )
keys will edit the blinking digit. The ID ( ) and TARGET () keys navigate to another digit. This also applies to the
CW-90, whose numeric keys can be used to insert a digit to the right of the blinking digit. Press ENTER to accept
the data and return to the next menu item.
Note
To exit Configuration and return to weighing, press the MENU key or navigate to the EXIT menu and press
ENTER.

16 CW-90/90X Checkweigher
3.2 Audit Menu
The audit menu accesses audit trail support. It provides tracking information for configuration and calibration
events. To prevent potential misuse, all configuration and calibration changes are counted as change events. Audit
information can be printed by pressing the PRINT key while displaying the audit trail items beneath the AUDIT
menu.
CALIB
Number
EXIT
EXIT T&DTESTSETUPAUDIT
XXXXXXX
CALIBR BRIGHTACCUM
Only displayed if
turned on
from Setup menu
ID
Only displayed if
turned on
from Setup menu
LR,V. CONFIG
Number
Figure 3-3. Audit Menu
Table 3-2. Audit Menu Parameters
AUDIT Menu
Parameter Description
LR.V. Legally relevant firmware version.
CALIB Number Displays total calibration events. Thedisplay alternates (in one-second intervals) between CALIB and the
four-digit number.
CONFIG
Number
Displays total configuration events. The display alternates (in one-second intervals) between CFG and the
four-digit number.
EXIT Exits the audit trail and returns to weigh mode.