OHAUS CKW-55 Instruction Manual
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OHAUS CKW-55 Instruction Manual

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  • Page 1 CKW-55 Indicator CKW Series Scale Instruction Manual...
  • Page 3 Ohaus Corporation, 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ, 07058-2033 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...
  • Page 4 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...

  • Page 5: Table Of Contents

    CKW-55 CHECKWEIGHER EN-1 TABLE OF CONTENTS FOR CKW-55 INDICATOR Page 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 INSTALLATION ......................... EN-7 2.1 Unpacking and Checking ......................EN-7 2.2 Selecting the Location ......................
  • Page 6 EN-2 CKW-55 CHECKWEIGHER TABLE OF CONTENTS FOR CKW-55 INDICATOR (Cont.) Page 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 ........
  • Page 7 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 ......................
  • Page 8 EN-8 Scale EN-8 Control Panel EN-9 RTC Battery Removal/Installation EN-46 CKW Series Scale EN-48 CKW-55 Indicator Table Mount Position EN-49 CKW-55 Indicator Wall Mount Position EN-49 Cable Entry Identification EN-53 Printed Circuit Board Connections EN-53 Open and Shorted Jumpers EN-54...

  • Page 9: Introduction

    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.

  • Page 10: Safety Precautions

    EN-6 CKW-55 CHECKWEIGHER 1.3 Safety Precautions For safe and dependable operation of this equipment, please comply with the following safety precautions: • Verify that the input voltage range printed on the data label matches the local AC power to be used.

  • Page 11: Installation

    This equipment should be used in an environment free from vibration, temperature extremes or highly corrosive conditions. These factors may affect normal operation of the unit. Scale bases used with the CKW-55 Indicator must be located on a stable level surface and kept away from vibrating sources such as large machinery or appliances.

  • Page 12: Initial Calibration

    EN-8 CKW-55 CHECKWEIGHER CAUTION BATTERY IS TO BE REPLACED ONLY BY AUTHORIZED SERVICE PERSONNEL. RISK OF EXPLOSION CAN OCCUR IF REPLACED WITH THE WRONG TYPE OR CONNECTED IMPROPERLY. Dispose of the battery according to local laws and regulations. 2.4 Initial Calibration Scales are factory calibrated prior to shipping.

  • Page 13: Control Panel

    CKW-55 CHECKWEIGHER EN-9 Overview of Parts and Controls (Cont.) 22 21 Figure 3-3. Control Panel. TABLE 3-1. PARTS AND CONTROLS (Cont.). Item Description Weight Display Checkweigh Bar Graph Capacity Label Window Numeric Keypad C clear button 16-22 Control Buttons See Table 3-2...
  • Page 14 EN-10 CKW-55 CHECKWEIGHER...

  • Page 15: Menu

    CKW-55 CHECKWEIGHER EN-11 Menu 3.3.1 Menu Structure CALIBRATION (Sec. 4.1) SETUP (Sec. 3.6.1) READOUT (Sec. 3.6.2) Span Perform Reset: No, Yes Reset: No, Yes Linearity Perform Legal-For-Trade: Off, On Unit: kg, lb, g, oz, lb:oz, % kg kg kg kg kg, lb...

  • Page 16: Menu Navigation

    EN-12 CKW-55 CHECKWEIGHER 3.3.2 Menu Navigation TO ENTER THE MENU MODE Press and hold the Menu button until MENU appears on the display. The first upper level menu CAL appears on the display. Summary of button navigation functions in menu mode: --Yes - Allows entry into the displayed menu.

  • Page 17: Application Modes

    EN-13 3.5 Application Modes Before using the CKW-55 Indicator, make sure it has been properly set up and calibrated (refer to Sections 3.3.2 Menu Navigation and Section 3.6.1 Setup Menu). If the unit is received as a scale, it has been factory calibrated and can be operated at this point using the factory default settings.

  • Page 18: Auto-Tare

    EN-14 CKW-55 CHECKWEIGHER Auto-Tare Auto-Tare automatically tares the initial weight (such as a container) placed on the empty platform, without having to press the TARE button. The tare value is cleared automatically when the weight on the pan is fully removed.

  • Page 19: Accumulation Operation

    CKW-55 CHECKWEIGHER EN-15 Accumulation Operation The Accumulation function is always on and allows basic statistical information to be collected from multiple weighings. Accumulated data collected includes total count (or number of samples), total sample weight, average sample weight, and a standard deviation of sample weight.

  • Page 20: Checkweighing

    Bar Graph, Beeper and Weight Display Indication The CKW-55 Indicator features a 24-segment, 3-color Bar Graph, complemented by an audible Beeper and Weight Display visual alert (refer to Sections 3.6.1 Setup Menu and 3.6.3 Mode Menu). These checkweigh indication features are easily configurable and can be turned on or off to suit most user preferences.

  • Page 21: Programming Accept Range By Numeric Key Entry

    CKW-55 CHECKWEIGHER EN-17 Programming Accept Range by Numeric Key Entry In the Mode menu, set Checkweigh to On and Set Point Input to Range (refer to Section 3.6.3). NOTE: The under and over set points are included in the Accept range.

  • Page 22: Programming Target, Minimum And Maximum Variance Values

    EN-18 CKW-55 CHECKWEIGHER Programming Target, Minimum and Maximum Variance Values In the Mode menu, set Checkweigh to On and Set Point Input to Variance (refer to Section 3.6.3). Under and over values are entered as the variance from the target value.

  • Page 23: Programming Target And Minimum And Maximum % Variance

    CKW-55 CHECKWEIGHER EN-19 Programming Target, and Minimum and Maximum % Variance In the Mode menu, set Checkweigh to On and Set Point Input to Percent (refer to Section 3.6.3). Press the TARGET button to initiate checkweigh entry sequence. TARGET flashes momentarily to indicate the first parameter to be entered.

  • Page 24: Normal Checkweighing Operation

    EN-20 CKW-55 CHECKWEIGHER Normal Checkweighing Operation Normal checkweighing is used to determine when the weighed sample is within the target range. In this example, Target range settings are Under 3 kg and Over 5.5 kg. If a container is used, tare it first.

  • Page 25: Zero Checkweighing Operation

    CKW-55 CHECKWEIGHER EN-21 Zero Checkweighing Operation Zero Checkweighing is used when comparing subsequent samples to an initial reference sample. Press the TARGET button to set target to zero, then set the Variance Under and Over values. In this example, Under and Over values are 0.050 kg.

  • Page 26: Library Operation

    3.5.3 Library Operation The CKW-55 Indicator allows the storage of checkweighing data in 20 Library locations, designated ID 01 to ID 20. Each Library location includes: a Part Number or name, Pre-set Tare, Maximum, Minimum, and Target value. Data entered into the libraries can be recalled for use, edited or deleted.
  • Page 27 CKW-55 CHECKWEIGHER EN-23 Entering and Editing Library Data (Cont.) To enter letters instead of numbers, use the ASCII entry format: Enter a 3 digit ASCII code shown in Table 6-2, then press NEXT+/- button. The 3 digits convert to an equivalent single ASCII character, non-displayable ASCII codes produce “_”.

  • Page 28: Loading An Existing Library To The Active Checkweigh Mode

    EN-24 CKW-55 CHECKWEIGHER Entering and Editing Library Data (Cont.) Press LIBRARY Save to accept the entry. The calculated value 5.500 (4 kg + 1.5 kg) will freeze momentarily to confirm the entry. Display -END- indicates end of Library entry sequence.

  • Page 29: Reviewing Library Data

    CKW-55 CHECKWEIGHER EN-25 Reviewing Library Data To review Library data, the Library must be set On. If the library is Off, pressing the LIBRARY Save button will display the message -NO-, and returns to the active weighing mode. Press LIBRARY Save button, the last active Library location and Part Number will be displayed.
  • Page 30 7500 divisions for CKW Scales. Invalid entries will result in a display -NO- and will not be saved. 3.With LFT set to ON, Full Scale Capacity and Graduation combinations may not exceed 10,000 for CKW-55 Indicators, or 3,000 for CKW Scales 4.When Full Scale Capacity and graduation combinations exceed the resolution limits, the Graduation value will be...

  • Page 31: Readout Menu

    CKW-55 CHECKWEIGHER EN-27 3.6.2 Readout menu The Readout menu is used to configure display parameters and adopt the scale to environmental conditions. Reset This menu item is used to reset the Readout menu to factory defaults. Selections are: No, Yes.

  • Page 32: Mode Menu

    EN-28 CKW-55 CHECKWEIGHER Power Saver This menu item is used to enable power saving function. Selections are: SLEEP Specifies the number of minutes that the display will remain on in the absence of scale activity. The display flashes the last Sleep value entered. Values between 0 to 99 are entered via the numeric keypad.
  • Page 33 CKW-55 CHECKWEIGHER EN-29 Beeper Signal This menu item is used to define when beeper sounds an (audible alert) during checkweighing. Selections are: O F F O F F O F F O F F O F F = Beeper does not sound.
  • Page 34 EN-30 CKW-55 CHECKWEIGHER Bar Graph Increment This menu item is used to define how the bar graph segments are incremented during checkweighing. Selections are: Scaled = Each bar graph increment is automatically calculated based on the set point entries and scaled relative to the scale capacity.

  • Page 35: Print Menu

    = Allows output of numeric data only, no additional descriptive text will be printed. Selections are: OFF, On. Header = Allows printing the pre-set header (OHAUS, Model No., and software version). Selections are: = Header data is not printed. Single = Header data is printed only once at the very next printout*.
  • Page 36 EN-32 CKW-55 CHECKWEIGHER Gross Allows printing the Gross weight value. Selections are: OFF or On. Allows printing the Net weight value. Selections are: OFF or On. Tare Allows printing the Tare weight value. Selections are: OFF or On. Allows printing of specified GMP data. Selections are: DT-TM = Prints GMP Date-Time menu.

  • Page 37: Communication Menu

    CKW-55 CHECKWEIGHER EN-33 Print Layout This menu determines the format of data output to a printer or computer. Selections are: Format and Line Feed. FORMAT This menu item is used to define printing format. Selections are: Column (COLUM) = A multi-line (single column style) printout is generated. A CRLF is added after each item.
  • Page 38 EN-34 CKW-55 CHECKWEIGHER Baud Rate This menu item is used to define Baud rate. Selections are: 300, 600, 1200, 2400, 4800, 9600 or 19200..Parity This menu item is used to define parity. Selections are: None, Odd or Even.

  • Page 39: I/O Menu

    CKW-55 CHECKWEIGHER EN-35 3.6.6 I/O Menu The I/O Menu is used to configure the optional input and output device parameters. Reset This menu item is used to reset the I/O menu to factory defaults. Selections are: No, Yes. External Input This menu item is used to define a function to be controlled by an optional external input device such as a foot switch.

  • Page 40: Gmp Data Menu

    EN-36 CKW-55 CHECKWEIGHER Note: The normally closed relay condition is only active while the Indicator is powered on. When powered off or when power is removed, the relay condition returns to a normally open condition. Restoring power to the Indicator will restore the closed condition of the relays if selected.

  • Page 41: Lockout Menu

    CKW-55 CHECKWEIGHER EN-37 Date Setup This menu item is used to define the date parameters. Selections are: Format, Set. FORMAT Selections are: MDY = MM/DD/YY ( “/” separators on printout). D.M.Y = DD.MM.YY ( “.”Separators on printout). YMD = YY/MM/DD ( “/” separators on printout).

  • Page 42: Hardware Lockswitch

    EN-38 CKW-55 CHECKWEIGHER Lockout Menu Settings This menu item is used to define which menus are locked or unlocked. Selections are: Reset, Cal, Setup, Read, Mode, Print, Com, I/O, GMP Data. Reset unlocks all menus. Sub-menus selections are: OFF or On.

  • Page 43: Care And Maintenance

    4.1 Calibration When the CKW-55 Indicator is initially set up to a base, it must be calibrated before use to ensure accurate weighing results. CKW Scale models are shipped pre-calibrated from the factory. However, many conditions may require that the scale be recalibrated.

  • Page 44: Linearity Calibration

    EN-40 CKW-55 CHECKWEIGHER After a few seconds, the requested calibration value and unit (based on the Full Scale Capacity and Calibration Unit setting from the Setup Menu) flashes on the display. (This sample illustrates a Span Calibration value based on a Full Scale Capacity and Calibration Unit setting % kg lb g oz B/G Net Tare PT of 30 kg.)

  • Page 45: Calibration Test

    CKW-55 CHECKWEIGHER EN-41 After a few seconds, the requested Full Scale calibration value and unit flashes on the display. This is a fixed value based on the full scale capacity and cannot be changed. (This sample illustrates a Full Scale Linearity Calibration value based on a Full Scale Capacity % kg lb g oz B/G Net Tare PT and Calibration Unit setting of 30 kg.)

  • Page 46: Geographical Adjustment Factor

    EN-42 CKW-55 CHECKWEIGHER 4.1.4 Geographical Adjustment Factor This menu item is used to allows entry of values from 0 to 31 and is used to compensate for slight variations in gravity at different geographical locations around the world.( Complete Geographical Adjustment Factors are listed in Table...

  • Page 47: Geographical Adjustment Values

    CKW-55 CHECKWEIGHER EN-43 TABLE 4-1. GEOGRAPHICAL ADJUSTMENT VALUES Elevation above sea level in meters Geographical latitude 1300 1625 1950 2275 2600 2925 3250 away from the equator, 1300 1625 1950 2275 2600 2925 3250 3575 (North or South) in Elevation above sea level in feet degrees and minutes.

  • Page 48: Gmp Calibration Printout

    EN-44 CKW-55 CHECKWEIGHER 4.1.5 GMP Calibration Printout If any setting in the Print-Content-GMP menu (refer to Section 3.6.4 Print Menu) is turned on, GMP automatically prints the calibration data after calibration or calibration test is completed. Other GMP data, if turned on, will also be printed as shown.

  • Page 49: Cleaning

    • Removable components such as the weighing platform, leveling feet and rubber load pads (including column and CKW-55 Indicator when purchased as a scale system) may be removed and cleaned 4.3 Troubleshooting TABLE 4-2.

  • Page 50: Service Information

    4.4 Service Information If the Troubleshooting section does not resolve or describe your problem, you will need to contact an authorized Ohaus Service Agent. For Service assistance in the United States, please call Aftermarket, Ohaus Corporation toll-free at (800) 526-0659.

  • Page 51: Lithium Battery Replacement

    CKW-55 CHECKWEIGHER EN-47 4.5.1 Lithium Battery Replacement: Some symptoms of a low Real-Time Clock (RTC) battery condition include: A display of Err 10 at power-on, an incorrect time or date printout, loss of library or accumulation data. Battery replacement should only be done by qualified service personnel. To replace the lithium battery, the Indicator housing needs to be opened.

  • Page 52: Technical Data

    EN-48 CKW-55 CHECKWEIGHER 5. TECHNICAL DATA 5.1 Drawings and Dimensions Figure 5-1. CKW Series Scale. TABLE 5-1. DIMENSIONS Base Overall Height Overall Width Overall Depth Distance from Pan Distance from Table to bottom of Indicator to surface of Pan CKW3R, CKW6R...

  • Page 53: Drawings And Dimensions

    CKW-55 CHECKWEIGHER EN-49 5.1 Drawings and Dimensions (Cont.) Figure 5-2. CKW-55 Indicator Table Mount Position. Figure 5-2. CKW-55 Indicator Wall Mount Position.

  • Page 54: Technical Data

    EN-50 CKW-55 CHECKWEIGHER 5.2 Technical Data Materials Housing: stainless-steel Base: Stainless Steel Keypad/display overlay: polyester Feet: Rubber Ambient conditions The technical data is valid under the following ambient conditions: Ambient temperature: -10°C to 40°C / 14°F to104°F Relative humidity: Maximum relative humidity 80% for temperatures up to 31°C decreasing linearly to 50% relative humidity at 40°C.

  • Page 55: Accessories And Options

    CKW-55 CHECKWEIGHER EN-51 6. ACCESSORIES AND OPTIONS TABLE 6-1. ACCESSORIES AND OPTIONS. DESCRIPTION PART NUMBER Wall/Table Mount Kit 71167964 Column Mount Kit 71167972 RS232 Cable/Printer SF42 80500574 RS232 Cable/PC 25-pin 80500553 RS232 Cable/PC 9-pin 80500552 SF42 Printer SF42 External Foot Switch...

  • Page 56: Ascii Number To Character Conversion

    EN-52 CKW-55 CHECKWEIGHER TABLE 6-2. ASCII NUMBER TO CHARACTER CONVERSION. ASCII Character ASCII Character ASCII Character space ‘ “ & < > ¦...

  • Page 57: Appendix A Making Connections To The Indicator

    CKW-55 CHECKWEIGHER APPENDIX A EN-53 A. MAKING CONNECTIONS TO THE INDICATOR The CKW-55 Indicator housing contains 4 liquid-tight connectors at the bottom for external cabling. Figure A-1 illustrates the locations of the liquid tight connectors. LOAD AC POWER CELL Figure A-1. Cable Entry Identification.

  • Page 58: Jumper Positions

    A.3.2 Connecting External Input Device (Not supplied) The CKW-55 Indicator has provisions to connect an external input device such as a foot switch (purchased separately) to provide a selected function. The selected function can be set in the I/O menu, (see section 3.6.6 when the indicator is fully functional).

  • Page 59: Appendix B Legal For Trade

    CKW-55 CHECKWEIGHER APPENDIX B EN-55 B. LEGAL FOR TRADE Before this product can be used in legal-for-trade or legally controlled applications, it must be inspected in accordance with local Weights and Measures or approval agency regulations. It is the responsibility of the purchaser to ensure that all pertinent legal requirements are met.

  • Page 60: Verification

    EN-56 APPENDIX B CKW-55 CHECKWEIGHER B.2 Locking Metrological Parameters (Cont.) Position the LFT switch (S1) to the direction shown by the arrow. (Refer to Figure B-1.) With this change, the Legal For Trade menu setting and all LOCK menu settings now become non-alterable.

  • Page 61: B-2 Internal Wire Seal

    CKW-55 CHECKWEIGHER APPENDIX B EN-57 B.4 Sealing (Cont.) Internal Sealing When the internal sealing method is used, first remove all AC power from the scale system. On scales containing an optional rechargeable battery system, set the scale Off using the ON/ZERO Off button. Remove the four flat head screws at the left and right sides of the Indicator housing and pull the front panel of the Indicator forward.

  • Page 62: B-4 External Wire Seal

    EN-58 APPENDIX B CKW-55 CHECKWEIGHER B.4 LFT Sealing (Cont.) External Sealing There are two different methods for external sealing, a crimped wire seal, and the application of a tamper proof label. Tamper Proof Label Sealing Wire Sealing Place an adhesive seal over one of the flat head screws at the Remove the two flat head screws from one side of the side of the Indicator housing.

  • Page 63: Appendix C Ckw Indicator Mounting

    CKW-55 CHECKWEIGHER APPENDIX C EN-59 C. CKW INDICATOR MOUNTING When purchased as an Indicator only configuration, the CKW Indicator is supplied with a Wall/Table mounting Bracket. The bracket allows the Indicator to be mounted to a vertical wall surface or to a table or other appropriate flat horizontal surface.

  • Page 64: C-1 Mounting Bracket Dimensions

    EN-60 APPENDIX C CKW-55 CHECKWEIGHER Figure C-1. Mounting Bracket Dimensions.

  • Page 65: Appendix D Serial Communication

    (The unit can not be selected if it is not enabled). Print model name, software revision, and LFT status - if on, (eg. “CKW-55 Sr 1.0 LFT “On”, or “CKW-55 Sr 1.1” Set a pre-tare value of x, in present weighing units.* (Positive values only) * Up to 6 numeric characters, an optional “-”...

  • Page 66: Appendix E Capacity And Graduation Table

    EN-62 APPENDIX E CKW-55 CHECKWEIGHER E. CAPACITY AND GRADUATION TABLE Full Scale Graduation Value Capacity 0.0002, 0.0005, 0.001, 0.002 0.0005, 0.001, 0.002, 0.005 0.0005, 0.001, 0.002, 0.005 0.0005, 0.001, 0.002, 0.005, 0.01 0.001, 0.002, 0.005, 0.01, 0.02 0.001, 0.002, 0.005, 0.01,...

  • Page 67: Limited Warranty

    Ohaus products are warranted against defects in materials and workmanship from the date of delivery through the duration of the warranty period. During the warranty period Ohaus will repair, or, at its option, replace any component(s) that proves to be defective at no charge, provided that the product is returned, freight prepaid, to Ohaus.
  • Page 68 EN-64 CKW-55 CHECKWEIGHER Ohaus Corporation 19A Chapin Road, P.O. Box 2033 Pine Brook, NJ 07058, USA Tel: (973) 377-9000 Fax: (973) 593-0359 www.ohaus.com With offices worldwide. *80251031* P/N 80251031 © Ohaus Corporation 2004, all rights reserved. Printed in China...

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