OHAUS Navigator Series Service Manual
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OHAUS Navigator Series Service Manual

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SERVICE MANUAL
TM
Navigator
Series Scales

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  • Page 1 SERVICE MANUAL Navigator Series Scales...

  • Page 3: Table Of Contents

    5.2 SPARE PARTS NVT APPENDIX A. STANDARD CALIBRATION A.1 SPAN CALIBRATION A.2 LINEARITY CALIBRATION APPENDIX B. SERVICE MENU B.1 ENTERING THE SERVICE MENU B.2 RAMP B.3 LINEAR CALIBRATION B.4 SPAN CALIBRATION B.5 GEOGRAPHICAL ADJUSTMENT FACTOR (GEO) Ohaus Corporation www.ohaus.com Navigator Series Service Manual...
  • Page 4 B.6 LFT B.7 EXPANDED RESOLUTION (E.PAnd) B.8 RESET APPENDIX C. SERVICE TOOL C.1 HARDWARE AND SOFTWARE SETUP C.2 REPLACE PCB/ CONFIGURING THE SCALE C.3 DOWNLOAD SOFTWARE C.4 DIAGNOSTICS APPENDIX D. GEOGRAPHICAL ADJUSTMENT VALUES Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 5: Getting Started

    1.1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Navigator 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, specifications, and the mechanical and electronic functions of the scale.

  • Page 6: Tools And Test Equipment Required

    3. USB Interface Kit – PN 83032108 1.4 SPECIFICATIONS Specifications for the Ohaus Navigator Scales are listed in Table 1-1. 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 7 ±6d 1.5kg,3kg NVT10201 10200 ±4d 5kg,10kg Approved Models: Approval Span Lin. Cal. Model* Class Cal. Wt. NVT1601M 1600g 0.5g 1kg,1.5kg NVT3200M 3200g 2kg, 3kg NVT6400M 6400g 3kg, 6kg NVT16000M 16000g 10kg 10kg, 15kg Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 8: Controls

    The sensor activation distance will vary based on the reflective nature of the object. If unwanted activations occur due to unique situations the sensor can be turned off. *Availability of IR Sensor is dependent on model and region. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 9: Menu Structure

    IR Sensor. “Zero”, “Print”, “Function” or “Tare” allows the IR sensor to act the same as the related button. “Display” activates the display if Display-Auto is set. “Off” disables the sensor.* Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 10: Units Menu

    The Menu Lock switch limits changes to the Cal, Setup, Mode and Unit menus. The switch in type approved models may set some balance settings as required by the approval agency. The switch may be secured using paper seals, wire seals or plastic ties. Locked Unlocked Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 11: Service Menu

    For more detail on using the service menu see Appendix B. TABLE 1-6 NAVIGATOR SERVICE MENU STRUCTURE Service Menu Ramp Span Menu Items: Expand Reset Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 12: Diagnostic Guide

    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. Ohaus Corporation www.ohaus.com...
  • Page 13 PCBA, and then do the service calibration Err 9.3 EEPROM data error Implement service calibration Contact an authorized Err 13 Fail to write EEPROM. service agent Contact an authorized Err 53 Invalid checksum data service agent Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 14: Maintenance Procedures

    CHAPTER 3 MAINTENANCE PROCEDURES 3 MAINTENANCE PROCEDURES 3.1 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 15 Remove the 5 screws holding the Top and Bottom Housings in place. (See Figure 3-2.) (Note: NV model shown) Figure 3-2 Separating the Top and Bottom Housings Turn the scale over and remove the upper housing. Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 16: Replacing The Load Cell

    Yellow wire -EXE Black wire -SIG White wire NVT Models +SIG Green wire +EXE Red wire Yellow wire -EXE Black wire -SIG Red wire NVT Approve Models +SIG White wire +EXE Green wire Ohaus Corporation www.ohaus.com Navigator Series Service Manual...
  • Page 17 4. Slide the AC jack into its position in the lower housing. Route the AC adapter cable as shown in Figure 3-4. Position jack Route wires Position PCB on locating Pins NV models Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 18: Replacing The Printed Circuit Board And Display

    PCB. When installing the new LCD Display, carefully feed the lead-wires through their holes, check that the new assembly is seated properly on the PCB and then solder the lead-wires. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 19: Replacing The Function Label

    NV Models NVT Models Figure3-6. Down Stop Adjustment Screws To adjust the down-stops on the applicable models follow the procedures below. Models without adjustable down-stops need no action. To ensure full weight reading: Navigator Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 20 ¼ turn. Repeat the test to see if it is corrected. 6. If the weight is placed at the edges of the pan there may be a weight change which indicates the down-stop is working and this is okay. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 21: Testing

    Make sure the test area is free from drafts and that the scale rests on a level and vibration-free surface. 4.1 TEST MASSES REQUIRED The masses required to test the Ohaus Navigator scales must meet the requirements of ASTM Class 4 or OIML F2 Tolerance. The mass values are listed in Table 4-1. TABLE 4-1...

  • Page 22: Operational Test

    Turn the scale on, and ensure that all segments are enabled and displayed briefly. This is a Segment Display Test. (See Figure 4-1) Figure 4-1 LCD Segment Display 4.4 LOAD CELL TEST USING RAMP To test the Load Cell using RAMP, see Appendix B. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 23: Performance Tests

    The Precision Test is a quick test that measures the deviation of a limited number of weight readings, which should match the specification for each model, listed in Tolerance Table 4-2. 1. Power on the balance. The reading on the display should be 0g. Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 24: Repeatability Test

    A. Set the instrument to display the same units as the performance specifications. (Usually kg, g, or mg) Record Settings: Stability Setting = ____________ Filter Level Setting = ____________ Auto Zero Tracking Setting = ____________ Displayed Units = ____________ Mass Used = ____________ Ohaus Corporation www.ohaus.com Navigator Series Service Manual...
  • Page 25 7. Calculate the Delta x Delta for each reading and record in worksheet. 8. Add the ten Delta x Delta values and divide by 9 9. Calculate the Standard Deviation by applying the square root of the result from step 8. =___________ Standard Deviation Navigator Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 26 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) Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 27: Linearity Test

    5. Place Load 2 on the Scale and press TARE. 6. Place the test mass on the Scale, record the weight and remove. 7. Place Load 3 on the Scale and press TARE. Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 28: Off-Center Load Test

    Weighing Pan’s center, with points A – D indicated Figure 4-4. Navigator Load Cell and Weighing Pan 1. Place the test weight in the center of the Weighing Pan. 2. Tare the balance. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...
  • Page 29 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. Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 30: Parts Lists & Diagrams

    CHAPTER 5 PARTS LISTS & DIAGRAMS 5 PARTS LISTS & DIAGRAMS This section of the manual contains exploded views for the Navigator series scales. The exploded view drawings are designed to identify the parts which can be serviced on the scale in the field.

  • Page 31: Spare Parts Nv

    CHAPTER 5 PARTS LISTS & DIAGRAMS 5.1 SPARE PARTS NV Figure 5-1. Navigator NV Spare Parts Navigator Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 32 PCBA Spare 2Laye No IR NV NVT PCBA Spare 2Layer 1IR NV NVT Feet CableKit PowerAdapter(noplugs) PowerAdapterPlugSet PWR,Something 12V 0.5A UK PLUG Box, DS, STX SPX SKX SJX/E SJX Carton Spare 300x250x182mm Ohaus style Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 33: Spare Parts Nvt

    CHAPTER 5 PARTS LISTS & DIAGRAMS 5.2 SPARE PARTS NVT Figure 5-2. Navigator NVT Spare Parts Navigator Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 34 PCBA Spare 2Laye No IR NV NVT PCBA Spare 2Layer 1IR NV NVT Feet CableKit Loadcell Spare Rated 6kgx0.1g NVT Loadcell Spare Rated 10kgx0.1g NVT Loadcell Spare Rated 35kgx1g NVT PowerAdapter(noplugs) PowerAdapterPlugSet PWR,Something 12V 0.5A UK PLUG Box,Shipping Ohaus Corporation www.ohaus.com Navigator Series Service Manual...
  • Page 35 CHAPTER 5 PARTS LISTS & DIAGRAMS 5.3 SPARE PARTS NVHD with Draftshield Navigator Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 36 Housing Top w/ EMC plate NVHD PowerAdapter(noplugs) PowerAdapterPlugSet PWR 12V 0.5A UK PLUG Box, DS, STX SPX SKX SJX/E Carton 300x250x182mm Ohaus style NOTE: PELASE FIND THE SPARE PART VIA MODEL IN THE SPARE PART LIST DOCUMENT. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 37: Appendix A. Standard Calibration

    Then try to calibrate again. If it continues to fail, there may be an internal problem. To resolve internal problems, follow procedures in Chapters 2 and 3. Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 38: Linearity Calibration

    Then try to calibrate again. If it continues to fail, there may be an internal problem. To resolve internal problems, follow procedures in Chapters 2 and 3. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 39: Appendix B. Service Menu

    Service Linearity does not have limit ranges on the weights used as does the standard user linearity procedure. Note: Be careful not to touch the scale or the table while calibration is in progress, as it will cause the process to fail. When LIN appears, press Yes. Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 40: Span Calibration

    Place the indicated weight in the center of the Pan. --C-- Pressing Yes after placing the prompted weight accepts the span weight shown on the display. The display then shows --C-- while the scale acquires the span point Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 41: Geographical Adjustment Factor (Geo)

    Values from 1 to 31 are available. No will increase the GEO value while Back will decrease it. Press Yes to accept the value shown on the display. The menu returns to the next item, Filter Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 42: Lft

    Press Yes to enter the reset setting menu, No appears. Press No to toggle the setting, YES appears. To accept a chosen setting (either No or Yes) press Yes. The display will advance to the next menu item, End. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 43: Appendix C. Service Tool

    Note: NVHD models are separated from NV general models in service tool, since the configuration and software are both different. The latest software service tool and support files are available on the Ohaus DMX site. Tools to connect the scale with computer 1.

  • Page 44: Replace Pcb/ Configuring The Scale

    1. Continue from the Procedure 8 in C.1 section, select Replace Main PCB and input the COM Port Configuration Note: NV models are with the setting 2400 7 none 2; NVHD models with 9600 8 none 1. Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 45: Download Software

    3. Click Finish, when the configuration process is completed. C.3 DOWNLOAD SOFTWARE 1. Continue from the Procedure 8 in C.1 section, select Download Software and input the COM Port Configuration 2. Select the software and click "Next" Navigator Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 46 5. Turn the scale on and perform a Service Calibration (see Appendix B), followed by Operational and Performance tests (Chapter 4). TABLE C3-1. MODELS AND SOFTWARE MATCHING Model 30481498_SR2.xx.txt NV222 NV422 NV622 NV221 NV621 NV1201 NV2201 NVT2201 NVT4201 NVT6201 NVT2200 NVT6200 NVT12000 NVT22000 NVT1601M NVT3200M NVT6400M NVT16000M Ohaus Corporation www.ohaus.com Navigator Series Service Manual...

  • Page 47: Diagnostics

    Continue from the Procedure 8 in C.1 section, select Diagnostics Enter the Command and click Send to get the response in the right box Figure C-3. Diagnostic screen Enter a “V” command. The response should be the software version (e.g., Sr: 2.00). Navigator Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 48: Appendix D. Geographical Adjustment Values

    41°12′ - 42°19′ 42°19′ - 43°26′ 43°26′ - 44°32′ 44°32′ - 45°38′ 45°38′ - 46°45′ 46°45′ - 47°51′ 47°51′ - 48°58′ 48°58′ - 50°06′ 50°06′ - 51°13′ 51°13′ - 52°22′ 52°22′ - 53°31′ 53°31′ - 54°41′ Ohaus Corporation www.ohaus.com Navigator Service Manual...
  • Page 49 62°09′ - 63°30′ 63°30′ - 64°55′ 64°55′ - 66°24′ 66°24′ - 67°57′ 67°57′ - 69°35′ 69°35′ - 71°21′ 71°21′ - 73°16′ 73°16′ - 75°24′ 75°24′ - 77°52′ 77°52′ - 80°56′ 80°56′ - 85°45′ 85°45′ - 90°00′ Navigator Service Manual Ohaus Corporation www.ohaus.com...
  • Page 52 ™ Registered trademark of Ohaus Corporation. 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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Navigator nv222Navigator nv422Navigator nv622Navigator nv221Navigator nv621Navigator nv1201 ... Show all

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