OHAUS CKW-55 User manual

CKW-55 Indicator
and
CKW Series Scale
Instruction Manual
T

Ted Xia
President
Ohaus Corporation
Pine Brook, NJ USA
Urs Muller
General Manager
Ohaus Europe
Greifensee, Switzerland
Ohaus Corporation, 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ, 07058-2033, USA
Declaration of Conformity We, Ohaus Corporation, declare under our sole responsibility that the instruments listed below are in conformity with the directives
and standards mentioned.
Model/Type CKW-55, CKW3R55, CKW6R55, CKW15L55, CKW30L55
EC Marking: EC Directive Applicable Standards
EU 73/23/EEC
Low Voltage
89/336/EEC
Electromagnetic compatibility
EN45501:1992 1)
For non-automatic weighing instruments used in an Article 1, 2.(a) application, additional metrological marking according to Annex IV of Council
directive 90/384/EEC must be attached to the instrument
90/384/EEC
Non-Automatic Weighing Instruments
Date: October 1, 2004
1) Valid only for CKW-55 terminals in connection with approved load cells
EN60950-1: 2003
EN61326-1:1997 +A1:1998 +A2: 2001
04
0103
i

ii
Marking
R
CUS
Compliance to the following standards is indicated by the corresponding marking on the product.
UL60950-1 : 2003
AS/NZS4251.1, AS/NZS4252.1
NSF CRITERIA C-2-1983
NSF/ANSI /3-A 14159-1 - 2002
FCC Note
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Industry Canada Note
This Class B digital apparatus complies with the Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
ISO 9001 Registration
In 1994, Ohaus Corporation, USA, was awarded a certificate of registration to ISO 9001 by Bureau Veritus Quality International (BVQI), confirming that the
Ohaus quality management system is compliant with the ISO 9001 standard’s requirements. On May 15, 2003, Ohaus Corporation, USA, was re-registered
to the ISO 9001:2000 standard.
Standard

CKW-55 CHECKWEIGHER EN-1
1. INTRODUCTION ........................................................................................................................ EN-5
1.1 Description ............................................................................................................................. EN-5
1.2 Features .............................................................................................................................. EN-5
1.3 Safety Precautions................................................................................................................... EN-6
1.3.1 Relay Option Safety Precautions..................................................................................... EN-6
2. INSTALLATION ......................................................................................................................... EN-7
2.1 Unpacking and Checking ........................................................................................................ EN-7
2.2 Selecting the Location ............................................................................................................. EN-7
2.3 Connecting Power ................................................................................................................... EN-7
2.3.1 AC Power...................................................................................................................... EN-7
2.3.2 Battery Power (Optional Equipment) .............................................................................. EN-7
2.4 Initial Calibration ..................................................................................................................... EN-8
3. OPERATION .............................................................................................................................. EN-8
3.1 Overview of Parts and Controls................................................................................................. EN-8
3.2 Control Functions .................................................................................................................. EN-10
3.3 Menu ............................................................................................................................ EN-11
3.3.1 Menu Structure ........................................................................................................... EN-11
3.3.2 Menu Navigation ........................................................................................................ EN-12
3.4 Turning Indicator On/Off ......................................................................................................... EN-12
3.4.1 Turning On ................................................................................................................. EN-12
3.4.2 Turning Off.................................................................................................................. EN-12
3.4.3 Stabilization................................................................................................................ EN-12
3.5 Application Modes ................................................................................................................ EN-13
3.5.1 Weighing.................................................................................................................... EN-13
Zero Operation ......................................................................................................... EN-13
Basic Weighing ........................................................................................................ EN-13
Manual Tare ............................................................................................................ EN-13
Preset Tare............................................................................................................... EN-13
Auto-Tare................................................................................................................. EN-14
Auto-Tare Accept ...................................................................................................... EN-14
Displaying Gross, Net, Tare ...................................................................................... EN-14
Changing Units of Measure ....................................................................................... EN-14
Printing Data ............................................................................................................ EN-14
Accumulation Operation ........................................................................................... EN-15
3.5.2 Checkweighing ........................................................................................................... EN-16
Bar Graph, Beeper and Weight Display Indication ...................................................... EN-16
Summary of Checkweigh Key Functions .................................................................... EN-16
Programming Accept Range by Numeric Key Entry .................................................... EN-17
Programming Target, Minimum and Maximum Variance Values ................................ EN-18
Programming Target and Minimum and Maximum % Variance ................................. EN-19
TABLE OF CONTENTS FOR CKW-55 INDICATOR Page

EN-2 CKW-55 CHECKWEIGHER
Normal Checkweighing Operation ............................................................................. EN-20
Negative Checkweighing Operation ........................................................................... EN-20
Zero Checkweighing Operation.................................................................................. EN-21
3.5.3 Library Operation ........................................................................................................ EN-22
Summary of Library Key Functions............................................................................ EN-22
Entering and Editing Library Data .............................................................................. EN-22
Loading an Existing Library to the Active Checkweigh Mode ....................................... EN-24
Reviewing Library Data ............................................................................................. EN-25
3.6 Scale Settings ....................................................................................................................... EN-25
3.6.1 Setup Menu ................................................................................................................ EN-25
3.6.2 Readout Menu ............................................................................................................ EN-27
3.6.3 Mode Menu ................................................................................................................ EN-28
3.6.4 Print Menu .................................................................................................................. EN-31
3.6.5 Communication Menu................................................................................................. EN-33
3.6.6 I/O Menu .................................................................................................................... EN-35
3.6.7 GMP Data Menu ......................................................................................................... EN-36
3.6.8 Lockout Menu ............................................................................................................ EN-37
3.6.9 Hardware Lockswitch .................................................................................................. EN-38
4. CARE AND MAINTENANCE .......................................................................................................... EN-39
4.1 Calibration ............................................................................................................................ EN-39
4.1.1 Span Calibration ......................................................................................................... EN-39
4.1.2 Linearity Calibration..................................................................................................... EN-40
4.1.3 Calibration Test ........................................................................................................... EN-41
4.1.4 Geographical Adjustment Factor .................................................................................. EN-42
4.1.5 GMP Calibration Printout .............................................................................................. EN-44
4.2 Cleaning ............................................................................................................................ EN-45
4.3 Troubleshooting.................................................................................................................... EN-45
4.4 Service information................................................................................................................ EN-45
4.5 Battery Replacement .............................................................................................................. EN-46
4.5.1 Lithium Battery Replacement ........................................................................................ EN-47
4.5.2 Rechargeable NIMH Battery Replacement ..................................................................... EN-47
5. TECHNICAL DATA ....................................................................................................................... EN-48
5.1 Drawings and Dimensions .................................................................................................... EN-48
5.2 Technical Data ...................................................................................................................... EN-50
5.3 Specifications ....................................................................................................................... EN-50
TABLE OF CONTENTS FOR CKW-55 INDICATOR (Cont.) Page

CKW-55 CHECKWEIGHER EN-3
TABLE OF CONTENTS FOR CKW-55 INDICATOR (Cont.) Page
6. ACCESSORIES AND OPTIONS ..................................................................................................... EN-51
6.1 Available Options .................................................................................................................. EN-51
6.1.1 Relay Option................................................................................................................... EN-51
6.1.2 RS485/422 Option .......................................................................................................... EN-51
6.1.3 Rechargeable Battery option ............................................................................................ EN-51
APPENDIX A MAKING CONNECTIONS TO THE INDICATOR................................................................... EN-53
A.1 Load Cell Connections........................................................................................................... EN-53
A.2 Jumper Positions .................................................................................................................. EN-54
A.3 Interface Connections ............................................................................................................ EN-54
A.3.1 Connecting RS232 Interface Cable ................................................................................... EN-54
A.3.2 Connecting External Input Device (Not supplied) .............................................................. EN-54
APPENDIX B LEGAL FOR TRADE ...................................................................................................... EN-55
B.1 Setup Procedure ................................................................................................................... EN-55
B.2 Locking Metrological Parameters ........................................................................................... EN-55
B.3 Verification ............................................................................................................................ EN-56
B.4 Sealing ............................................................................................................................ EN-56
APPENDIX C CKW INDICATOR MOUNTING ......................................................................................... EN-59
APPENDIX D SERIAL COMMUNICATION ........................................................................................... EN-61
D.1 Interface Commands ............................................................................................................. EN-61
APPENDIX E CAPACITY AND GRADUATION TABLE ............................................................................ EN-62
Limited Warranty ........................................................................................................................... EN-63

EN-4 CKW-55 CHECKWEIGHER
List of Tables
Table Number Title Page
3-1 Parts and Controls EN-8
3-2 Control Functions EN-10
4-1 Geographical Adjustment Values EN-43
4-2 Troubleshooting EN-45
5-1 Dimensions EN-48
6-1 Accessories and Options EN-51
6-2 ASCII Number to Character Conversion EN-52
D-1 Serial Interface Command Table EN-61
Figure Number Title Page
3-1 Indicator EN-8
3-2 Scale EN-8
3-3 Control Panel EN-9
4-1 RTC Battery Removal/Installation EN-46
5-1 CKW Series Scale EN-48
5-2 CKW-55 Indicator Table Mount Position EN-49
5-3 CKW-55 Indicator Wall Mount Position EN-49
A-1 Cable Entry Identification EN-53
A-2 Printed Circuit Board Connections EN-53
A-3 Open and Shorted Jumpers EN-54
B-1 Inside the Indicator Cover EN-55
B-2 Internal Wire Seal EN-57
B-3 Internal Sealing Label EN-57
B-4 External Wire Seal EN-58
B-5 External Sealing Label EN-58
C-1 Mounting Bracket Dimensions EN-60

CKW-55 CHECKWEIGHER EN-5
1. INTRODUCTION
This manual contains installation, operation and maintenance instructions for the CKW-55 Indicator and CKW Series Scales.
Please read this manual completely before installation and operation.
1.1 Description
The CKW Series is a dedicated static checkweighing product line with enhanced software and simplified user functionality.
Its easy-to-clean, hygienic design and stainless steel construction make it specifically ideal for food processing and other
wet-environment applications.
Behind this instrument stands Ohaus, a leading manufacturer of precision Indicators, Scales and Balances. An Aftermarket
Department with trained instrument technicians is dedicated to providing the fastest service possible in the event this
instrument requires servicing. Ohaus also has a Customer Service Department to answer any inquiries regarding
applications and accessories.
1.2 Features
Major features include:
• Up to 20,000 maximum displayed resolution
• Stainless steel enclosure with NEMA 4X / IP66 protection
• Stainless steel 2-way table/wall mount bracket included, (Indicator only configuration)
• Supports up to four 350 ohm analog load cells
• High-contrast 0.8"/20 mm high, 6-digit, 7-segment LED weight display with adjustable brightness
• Configurable 3-color, 24-segment LED over-accept-under checkweigh indication with audible signal
• Numeric keypad and 7-function membrane switch operation with optional function lockouts
• One-button checkweigh target set point entries by weight range, variance, or % offset from target
• Flexible unit switching: kg, g, lb, oz, lb:oz, %
• Fast < 2-second display update speed
• 20-part library storage for: Product ID no., Minimum, Maximum, Target and Tare values
• GMP, Time/Date, Auto-Tare, Accumulation, Average and Standard Deviation
• Geographical adjustment function for remote calibration and certification in applicable areas
• Bi-directional RS232 interface
• User-configurable external input connection for remote tare, zero, print and other operations
• Universal switching power supply: nominal 100-240 V ac, 50-60 Hz
• Scale models include a tubular column: 304 stainless steel, 11.8" / 300 mm fixed height with indicator and base
mounting brackets
Optional features include:
• RS485/422 Serial Communication
• AC/DC Relay output
• Internal rechargeable nickel metal hydride (NiMH) battery

EN-6 CKW-55 CHECKWEIGHER
1.3.1 Relay Option Safety Precautions
This equipment may have an optional AC or DC Relay Option board installed. This option allows external device control to
be coordinated to the Indicator’s bar graph settings.
• Verify that the input voltage range printed on the data label matches the local AC power to be used.
• Make sure that the power cord does not pose a potential obstacle or tripping hazard.
• Use only approved accessories and peripherals.
• Operate the equipment only under ambient conditions specified in these instructions.
• Disconnect the equipment from the power supply when cleaning equipment .
• Do not operate the equipment in hazardous or unstable environments.
• Do not immerse the equipment in water or other liquids.
• Do not drop heavy loads on the platform.
• Service should only be performed by authorized personnel.
• This equipment is supplied with a grounded power cable. Use only with a compatible grounded power outlet.
1.3 Safety Precautions
For safe and dependable operation of this equipment, please comply with the following safety precautions:
Before making connections to the Relay terminals, remove power from the system. If the system contains an optional
rechargeable battery system, be sure that the ON/ZERO Off button is used to fully turn off the system after removing the AC
power plug.
More detailed installation instructions are included with the Relay Option Kit when purchased.
CAUTION: ELECTRICAL SHOCK HAZARD. REMOVE ALL POWER CONNECTIONS TO THE
INDICATOR BEFORE SERVICING OR MAKING INTERNAL CONNECTIONS. THE HOUSING
SHOULD ONLY BE OPENED BY AUTHORIZED AND QUALIFIED PERSONNEL, SUCH AS AN
ELECTRICAL TECHNICIAN.