OHAUS Traveler TA152 Service Manual
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Summary of Contents for OHAUS Traveler TA152
- Page 1 SERVICE MANUAL Traveler Scales ™ Ohaus Corporation 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ 07058-2033 (973) 377-9000...
- Page 3 Scales ™ The information contained in this manual is believed to be accurate at the time of publication, but Ohaus Corporation assumes no liability arising from the use or misuse of this material. Reproduction of this material is strictly prohibited.
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Page 6: Table Of Contents
Traveler Scales with Square Draft Shield: Housing & Parts ........5-2 Traveler 203 Scale with Round Draft Shield: Housing & Parts........5-4 Traveler Scales with No Draft Shield: Housing & Parts ..........5-6 Appendix A STANDARD CALIBRATION Calibration......................... A-1 Ohaus Corporation www.ohaus.com Traveler™ Series Scales: Service Manual... - Page 7 The RS232 Interface connects to the scale through the Bottom Housing.... C-1 RS232 Interface (PN 71147376 or 72206287)............. C-1 Com Port Configuration screen with default settings ........... C-2 Config Tool’s Test Command screen ..............C-2 Config Tool’s Configuration Screen..............C-3 Traveler™ Series Scales: Service Manual Ohaus Corporation www.ohaus.com...
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Page 8: Chapter 1 Getting Started
INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Traveler Series scales. Familiarity with the scale’s Instruction Manual is assumed. The contents of this manual are contained in five chapters: Chapter 1 Getting Started – Contains information on service facilities, tools and test equipment, specifications, and the mechanical and electronic functions of the scale. -
Page 9: Tools And Test Equipment Required
(PN 71147376 or 72206287.) SPECIFICATIONS Complete specifications for the Ohaus Traveler Scales are listed in Table 1-2. When a scale has been serviced, it must meet the specifications listed in the table. Before servicing the scale, determine what specifications are not met. -
Page 10: Specifications For Taj Models
To capacity by subtraction ≤3 seconds Stabilization Time Operating Temperature Range 50° - 104°F / 10° - 40°C Operating Humidity Range 30% - 90% Pan Size (mm) 120 dia. 123 x 124 Traveler™ Series Scales Service Manual Ohaus Corporation www.ohaus.com... -
Page 11: Specifications For Se Models
To capacity by subtraction Tare range Stabilization ≤3 seconds Time Operating 50° - 104°F / 10° - 40°C Temperature Range Operating 30% - 90% Humidity Range Pan Size 137 x 140 (mm) Ohaus Corporation www.ohaus.com Traveler™ Series Scales Service Manual... -
Page 12: Scale Operation
After temperature stabilization, allow an additional 20 minutes after turning the scale on, for the scale electronics to stabilize. Figure 1-3. Transportation Lock on Bottom Housing. Traveler™ Series Scales Service Manual Ohaus Corporation www.ohaus.com... -
Page 13: Overview Of The Controls
Secondary function (Long Press) – Starts Span calibration. Primary function (Short Press) – Advances to next available unit. Unit Menu function – (No) Used to reject the displayed setting and advance to next available setting. Ohaus Corporation www.ohaus.com Traveler™ Series Scales Service Manual... -
Page 14: Overview Of The Display Indicators
Display Panel’s control switches. See the Instruction Manual for a full description of the menus and how to access them. 1.5.6 Menu Structure The Menu Structure and default settings are shown in Table 1-7, next page. Traveler™ Series Scales Service Manual Ohaus Corporation www.ohaus.com... -
Page 15: Menu Structure
Handshake Handshake none none tola tical lb:oz Hold Totalize Spec. Gr *Print, RS232, and USB menus are only seen after the corresponding interface is installed. Menu selections in bold are default settings. Ohaus Corporation www.ohaus.com Traveler™ Series Scales Service Manual... -
Page 16: Connecting The Rs232 Interface
"ES" error indicates the balance has not recognized the command. Commands sent to the balance must be terminated with a carriage return (CR) or a carriage return-linefeed (CRLF). Data output by the balance is always terminated with CRLF. Traveler™ Series Scales Service Manual Ohaus Corporation www.ohaus.com... -
Page 17: Rs232 Command Table
(esc)T Print raw temperature data (esc)C Turn on all CLD segments. (Press any button to turn it off.) (esc)@ Toggle On/Off ‘continuous print’ of filtered raw weight and raw temperature data. Ohaus Corporation www.ohaus.com 1-10 Traveler™ Series Scales Service Manual... -
Page 18: Chapter 2 Troubleshooting
If more than one symptom is observed, approach one area at a time, and remember that the symptoms may be interrelated. If a problem arises that is not covered in this manual, contact Ohaus Corporation for further information. Traveler™ Series Service Manual... -
Page 19: Diagnostic Guide
Internal data error. Restore data. (See Appendix C.) Replace PCB. Battery symbol Battery power is low. Replace batteries soon. flashing Batt Low message Battery power is too low for Replace batteries. proper operation. Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual... -
Page 20: Chapter 3 Maintenance Procedures
CHAPTER 3 MAINTENANCE PROCEDURES PREVENTIVE MAINTENANCE Ohaus scales are precision instruments and should be carefully handled, stored in a clean, dry, dust-free area, and cleaned periodically. Follow these precautionary steps: – When a scale has had chemicals or liquids spilled on it, all exterior surfaces should be cleaned as soon as possible with warm water on a damp cloth. -
Page 21: Replacing The Load Cell
Chapter 5 for parts lists.) Follow these steps in reverse order to install the new PCB. Figure 3-2. Printed Circuit Board and Display. 5. Install the PCB using the Software Service Tool. (See Appendix C.) Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual... -
Page 22: Replacing The Auxiliary Display's Printed Circuit Board
The Function Label may need to be replaced, due to wear. Use a broad blade, such as a razor blade, to remove the label. Clean the glue residue from the Housing surface. Then carefully place the new label where the old one was. Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... - Page 23 CHAPTER 3 MAINTENANCE PROCEDURES Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
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Page 24: Chapter 4 Testing
4.1.1 Test Masses Required The masses required to test the Ohaus Traveler scales must meet the requirements of ASTM Class 4 or OIML F2 Tolerance. The mass values needed for Span and Linearity calibration are listed in the Specifications Tables 1-1, 1-2, 1-3 and 1-4. -
Page 25: Repeatability Test
3. Remove the mass from the platform. 4. Repeat this test starting at Step 1 until you record a total of ten readings Fill in the worksheet (Table 4-1) with the ten readings. Ohaus Corporation www.ohaus.com Traveler™ Series Scales Service Manual... -
Page 26: Repeatability Worksheet
Note: If the balance does not meet specifications, move it to a suitable location, ensure that it is level, and try again. If it still does not meet specifications, perform a service calibration, and try again. (See Appendix B for Service Calibration.) Traveler™ Series Scales Service Manual Ohaus Corporation www.ohaus.com... -
Page 27: Off Center Load Test
5. Maximum allowable change in displayed weight readings for each of the four positions can be found in Tables 1-1 – 1-4 (Specifications, page 1-2 – 1-4). If this maximum is exceeded, follow procedures in Section 4.4.3, Adjusting Off Center Load. Ohaus Corporation www.ohaus.com Traveler™ Series Scales Service Manual... -
Page 28: Adjusting Off Center Load
Note: It is not recommended that you try to adjust more than –5 counts if the beam has been filed already. If the beam has not been filed previously, you can adjust –10 counts. Remember, when filing you are weakening the beam. File a little at a time. Traveler™ Series Scales Service Manual Ohaus Corporation www.ohaus.com... -
Page 29: Linearity Test
Specification Table in Chapter 1. If not, calibrate (see Appendix A.1) and repeat the test. 9. If the Scale remains out of tolerance, the Load Cell may need to be replaced. Ohaus Corporation www.ohaus.com Traveler™ Series Scales Service Manual... - Page 30 In all cases where a part is replaced, the balance must be thoroughly checked after the replacement is made. The balance MUST meet the parameters of all applicable specifications in this manual. If further technical information is needed, please contact your local Ohaus distributor, or: Ohaus Corporation, www.ohaus.com 19A Chapin Road P.O.
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Page 31: Traveler Scales With Square Draft Shield: Housing & Parts
CHAPTER 5 PARTS LISTS & DIAGRAMS TRAVELER SCALES WITH SQUARE DRAFT SHIELD: HOUSING & PARTS Figure 5-1. Traveler Scales with Square Draft Shield: Housing & Internal Parts Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual... -
Page 32: Traveler Scales With Square Draft Shield: Housing & Parts
Housing, Top, Bottom Load Cell Hardware Kit PCB, Main Battery Cover, with Weigh Below Hook Interface Cover Feet, 4 Adapter For all Traveler Models, see specific parts lists through your Ohaus distributor, or at www.ohaus.com. Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 33: Traveler 203 Scale With Round Draft Shield: Housing & Parts
CHAPTER 5 PARTS LISTS & DIAGRAMS TRAVELER SCALES WITH ROUND DRAFT SHIELD: HOUSING & PARTS Figure 5-2. Traveler Scales with Round Draft Shield: Housing & Parts. Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual... - Page 34 Draft Shield, Round Pan, 100mm Pan Support, 100mm Level, Bubble Function Label Housing, Top, Bottom Load Cell Hardware Kit PCB, Main Cover, Battery, w/ Weigh Below Hook Interface Cover Feet, 4, Adjustable Adapter Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com...
- Page 35 CHAPTER 5 PARTS LISTS & DIAGRAMS TRAVELER SCALES WITH NO DRAFT SHIELD: HOUSING & PARTS Figure 5-4. Traveler Scales with No Draft Shield: Housing & Parts. Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
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Page 36: Traveler Scales With No Draft Shield: Housing & Parts
Drawing Item Description Pan, Square Pan Support, Square Level, Bubble Function Label Housing, Top, Bottom Load Cell Hardware Kit PCB, Main Battery Cover, w/ Weigh Below Hook Interface Cover Feet, 4, Adjustable Adapter Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... - Page 37 CHAPTER 5 PARTS LISTS & DIAGRAMS Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
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Page 38: Appendix A Standard Calibration
The scale will retain previously stored calibration data. See Specification Tables in Chapter 1 for mass weights for all Traveler models. Calibration masses are available as accessories from any Ohaus dealer. Note: Be careful not to touch the scale or the table while calibration is in progress, as it will cause the process to fail. - Page 39 APPENDIX A STANDARD CALIBRATION Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
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Page 40: Appendix B The Service Menu
Pan. It will vary with other scales. To exit the ramp function, press No. The scale advances to the Linear calibration menu. Press Yes to perform Linear Calibration. (See next page.) Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 41: Linear Calibration
Press No to move to Span calibration. Then press Yes. Note: Be careful not to touch the scale or the table while calibration is in progress, as it will cause the process to fail. Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual... -
Page 42: Span Calibration
Then try to calibrate again. If it continues to fail, there may be an internal problem. To resolve internal problems, follow procedures in Chapter 3. Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... - Page 43 APPENDIX B THE SERVICE MENU Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
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Page 44: Appendix C Software Service Tool Instructions
(PN 71147376 black or 72206287 white). 4. Install the software on a Personal Computer running Microsoft Windows NT 4.0 or later, or Microsoft Windows 98 or later. 5. Run the program Service Tool. (See next page.) Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... - Page 45 Figure C-3. Config Tool’s Test Command screen. – Enter a “P” command. The scale should respond with a weight value (e.g., 0.02g). – Enter a “V” command. The response should be the software version (e.g., Sr: 1.03) Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
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Page 46: Configuring The Scale (After Replacing The Pcb Or Load Cell
4. The bar (G) is a graphical measure of the Load Cell output currently being used. 5. Turn the scale off, perform a Service Calibration (see Appendix B), followed by Operational and Performance tests (Chapter 4). Traveler™ Series Service Manual Ohaus Corporation www.ohaus.com... - Page 47 APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS Ohaus Corporation www.ohaus.com Traveler™ Series Service Manual...
- Page 49 *80251719* P/N 80251719 SERVICE MANUAL: TRAVELER SERIES SCALES...
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