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OHAUS RANGER 3000 Service Manual
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OHAUS RANGER 3000 Service Manual

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See also: Instruction Manual , User Manual
SERVICE MANUAL
RANGER
RANGER
Ohaus Corporation, 7 Campus Drive, Suite 310, Parsippany, NJ 07054 (973) 377-9000
3000 &
™
Count 3000 Scales
™

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  • Page 1 SERVICE MANUAL 3000 & RANGER ™ RANGER Count 3000 Scales ™ Ohaus Corporation, 7 Campus Drive, Suite 310, Parsippany, NJ 07054 (973) 377-9000...
  • Page 2 ™ 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.

  • Page 3: Table Of Contents

    1.5.1 Overview of the Controls ...................1-3 1.5.2 Power On/Off ....................1-4 1.5.3 Menu Setup ......................1-5 1.5.4 Menu Navigation ....................1-5 Scale Operation Ranger 3000 ..................1-6 1.6.1 Overview of the Controls ...................1-6 1.6.2 Power On/Off ....................1-6 1.6.3 Menu Setup ......................1-8 1.6.4 Menu Navigation ....................1-8 Legal For Trade .......................1-9...
  • Page 4 4.4.4 Off-Center Load Test ..................4-5 4.4.5 Adjusting Off Center Load .................4-6 CHAPTER 5 DRAWINGS AND PARTS LISTS Ranger 3000 Scales: Housing & Internal Parts ............5-2 Ranger Count 3000 Scales: Housing & Internal Parts ..........5-4 Appendix A STANDARD CALIBRATION Calibration ....................... A-1 Setup and Calibration ....................
  • Page 5 TABLE OF CONTENTS Ranger 3000 Scales: Housing & Internal Parts ............5-3 Ranger Count 3000 Scales: Housing & Internal Parts ..........5-5 LIST OF ILLUSTRATIONS FIGURE NO. TITLE 1-1. Ranger Count 3000 Front Display with controls ...........1-3 1-2. Ranger 3000 Front Display with controls .............1-6 LFT Lock Switch and Seal ...................1-9...

  • Page 6: Chapter 1 Getting Started

    This service manual contains the information needed to perform routine maintenance and service on the Ohaus Ranger 3000 and Ranger Count 3000 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 –...

  • Page 7: Specifications

    CHAPTER 1 GETTING STARTED SPECIFICATIONS Complete specifications for the Ohaus Ranger 3000 and Ranger Count 3000 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 8: Scale Operation Ranger Count 3000

    Advance to the Go back to the Exit the library. Library current next library or previous library Function setting. setting. or setting. (Short Increment the Decrement the Press) displayed displayed value. value. Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 9: Power On/Off

    When [lo.bat] is displayed, the scale will shut off. Charging the scale must be performed in a dry environment. CAUTION: Battery is to be replaced only by an authorized Ohaus service dealer. Risk of explosion can occur if the rechargeable battery is replaced with the wrong type or if it is not properly connected.

  • Page 10: Menu Setup

    Moves backwards through the upper and middle level menus. - Backs out of a list of selectable items to the previous middle level menu. -- Exit Exits from menu directly to the active weighing mode. Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 11: Scale Operation Ranger 3000

    CHAPTER 1 GETTING STARTED SCALE OPERATION – RANGER 3000 This section contains information on the basic operation of the Ranger 3000 scale. 1.6.1 OVERVIEW OF THE CONTROLS Figure 1-2. Ranger 3000 Front Display with controls. TABLE 1-5. Button Functions Short Press (when on): Sets display to zero...
  • Page 12 When [lo.bat] is displayed, the scale will shut off. Charging the scale must be performed in a dry environment. CAUTION: Battery is to be replaced only by an authorized Ohaus service dealer. Risk of explosion can occur if the rechargeable battery is replaced with the wrong type or if it is not properly connected.

  • Page 13: Menu Setup

    CHAPTER 1 GETTING STARTED 1.6.3 Menu Setup Programmable features of the Ranger 3000 scales are contained in menus which are accessed  through  the  Display  Panel’s  control  switches.    See  the  Instruction  Manual  for  a  full   description of the menus and how to access them.

  • Page 14: Legal For Trade

    Refer to the illustration below for sealing methods. Paper Seal Wire Seal Lock Switch Unlocked Locked with Paper Seal Locked with Wire Seal Figure 1-3. Sealing Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 15: 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. Ranger™ (Count) 3000 Series Service Manual...

  • Page 16: Checking Load Cells For Trouble

    Load Cell cable from the PCB and measure again. If the voltage is 3.1 Volts dc, the Load Cell is defective and must be replaced. If the voltage remains low, the PCB is defective and must be replaced. Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...
  • Page 17 RC31P3 / 3kg R31P(E)6 / 6kg 0.1478 0.7478 1.3478 RC31P6 / 6kg R31P(E)15 / 15kg 0.0739 0.8239 1.5739 RC31P15 / 15kg R31P(E)30 / 30 kg 0.03695 0.78695 1.53695 RC31P30 / 30 kg Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 18: Testing The Printed Circuit Board (Pcb)

    Load Cell, allowing the scale to be separated from the Load Cell for the purposes of troubleshooting and calibration. The Load Cell used in the scale is rated at 2mV/V output with a 3.1 Volt excitation voltage applied. Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...
  • Page 19 PCB is functional. If the scale readings vary, or do not agree with readings in Table 2-3, the Main PC Board is defective and should be replaced. (See Chapter 3.) Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 20 Increase reference weight. Battery fails to charge Have battery replaced by Ohaus Battery is defective fully authorized service dealer. Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...

  • Page 21: Chapter 3 Maintenance Procedures

    5. Make a visual inspection for faulty connectors, wiring, and loose hardware. SERVICE STRATEGY All parts of the Ranger 3000 and Ranger Count 3000 are designed to be replaced rather than repaired. This includes the Main Printed Circuit Board (PCB) and Switches PCB, the Load Cell, and the cables.

  • Page 22: Separating The Top And Bottom Housings

    CHAPTER 3 MAINTENANCE PROCEDURES 3.3.1 Separating the Top and Bottom Housings Common hand tools are sufficient to disassemble the Ranger 3000 and Ranger Count 3000 scales. Turn the scale off and unplug the power cord before you begin. 1. Lift off the Weighing Pan.

  • Page 23: Main Printed Circuit Board

    6. Re-connect the Cable  connecting  the  Main  PCB  to  the  scale’s  power  system.     (See Figure 3-2.) 7. Insert and tighten the screws that secure the PCB to the bottom housing. Figure 3-3. Main Printed Circuit Board. Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 24: Removing/Replacing The Load Cell

    (see table 3-2). Install the load cell assembly to the bottom housing. Insert the bolts and their washers, and tighten the bolts. (See Table 3-1 for torque settings.) 5. Connect the Load Cell cables to the PCB. (See Figure 3-2.) Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...

  • Page 25: Setting The Overload Stops

    Note: Be careful not to overload the Load Cell, which would damage it. Figure 3-5. Overload Stops. 2. Repeat this for all four corners. 3. Test the scale to see if full capacity can be achieved. Ranger™ (Count) 3000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 26 CHAPTER 3 MAINTENANCE PROCEDURES TABLE 3-2. Ranger 3000/Ranger Count 3000 OVERLOAD STOP GAP SETTINGS Model Max. Capacity Overload Stop Gap R3000 / RC 3000 Scale Load Cell A/B mm C/D mm R31P(E)1502 1.5kg RC31P1502 R31P(E)3 RC31P3 R31P(E)6 10kg RC31P6 R31P(E)15...

  • Page 27: Removing/Replacing The Rechargeable Battery

    CHAPTER 3 MAINTENANCE PROCEDURES Removing/Replacing the Rechargeable Battery The Ranger 3000/Ranger Count 3000 has a rechargeable battery. If it fails to recharge, replace it as follows: 1. Lift  the  battery’s  front  end  enough  to   access the quick-connect tabs holding the wire leads.

  • Page 28: Chapter 4 Testing

    4.1.1 TEST MASSES REQUIRED The masses required to test the Ohaus Ranger 3000/Ranger Count 3000 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. TEST MASS VALUES...

  • Page 29: Performance Tests

    CHAPTER 4 TESTING Performance Tests Accurate performance of the Ranger 3000/Ranger Count 3000 scale is determined by a series of four performance tests. The displayed readings are compared with the tolerances listed for each test in Table 1-2. Tolerance values are expressed in counts. A one-count difference is shown in the last digit on the scale display.

  • Page 30: 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 4-2) with the ten (10) readings. Ranger™ (Count) 3000 Series Service Manual 4-3 Ohaus Corporation www.ohaus.com...
  • Page 31 Calculate the Standard Deviation by applying the square root of the result from step 8. =___________ Standard Deviation Note: If the balance does not meet specifications, move it to a suitable location, ensure that it is level, and try again. Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...

  • Page 32: Linearity Test

    3. Move the mass halfway (between the center and the edge) to the front of the Pan. Note any differences in the displayed weight reading. 4. Repeat the test for the back, left, and right position of the Pan. Ranger™ (Count) 3000 Series Service Manual 4-5 Ohaus Corporation www.ohaus.com...

  • Page 33: Adjusting Off Center Load

    Side view of Load Cell Weighing  Pan’s  center, with points A – D indicated Figure 4-1. Scale drawing of Ranger 3000/Ranger Count 3000 Load Cell and Weighing Pan. 1. Place the test weight in the center of the Weighing Pan. 2. Tare the balance.
  • Page 34 CHAPTER 5 PARTS LISTS & DIAGRAMS This section of the manual contains exploded views of the Ranger 3000/Ranger Count 3000 scales. The exploded view drawings are designed to identify the parts which can be serviced on the scale in the field.
  • Page 35 CHAPTER 5 PARTS LISTS & DIAGRAMS Ranger 3000 SCALES: PARTS Figure 5-1. Ranger 3000 Scales: Parts. Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...
  • Page 36 Line Cord, AU 72200231 Line Cord, GB 72200230 Line Cord, JP 30031898 Manual,CD, EN ES FR DE IT, V71 Note: For parts numbers, see your local Ohaus distributor, or visit www.ohaus.com. Ranger™ (Count) 3000 Series Service Manual 5-3 Ohaus Corporation www.ohaus.com...
  • Page 37 CHAPTER 5 PARTS LISTS & DIAGRAMS RANGER COUNT 3000 SCALES: PARTS Figure 5-2. Ranger Count 3000 Scales: Parts. Ohaus Corporation www.ohaus.com Ranger™ (Count) 3000 Series Service Manual...
  • Page 38 Line Cord, AU 72200231 Line Cord, GB 72200230 Line Cord, JP 30031898 Manual,CD, EN ES FR DE IT, V71 Note: For parts numbers, see your local Ohaus distributor, or visit www.ohaus.com. Ranger™ (Count) 3000 Series Service Manual 5-5 Ohaus Corporation www.ohaus.com...

  • Page 39: Appendix A Standard Calibration

    6. Or adjust the GEO setting according to your location (see instruction manual). Table A-1. Suggested Span Calibration Mass (sold separately) Mass Mass 1500g 1.5kg / 3lb 15000g 15kg / 30lb 3000g 3kg / 6lb 30000g 30kg / 60lb 6000g 6kg / 15lb Ranger™ 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 40: Setup And Calibration

    No to select an alternate weight. [--C--] will be displayed while the reading is stored. done 5. The display will show [done] if the calibration was successful. The scale returns to the previous application mode and is ready for use. Ohaus Corporation www.ohaus.com Ranger™ 3000 Series Service Manual...

  • Page 41: Appendix B Service Calibration

    Press the On/Zero then hold the Target and M+ keys simultaneously S.E.r.V.C.e for 6 seconds until appears in the weight window. Ranger 3000 Press the On/Zero then hold the Function and M+ keys S.E.r.V.C.e S.E.r.V.C.e simultaneously for 6 seconds until is displayed.

  • Page 42: Capacity Menu

    If span calibration was successful, the actual weight reading appears for three seconds, followed by the Service Linearity Calibration menu item. (The example shows a 3 kg span weight on the pan.) Ohaus Corporation www.ohaus.com Ranger™ 3000 Series Service Manual...

  • Page 43: Service 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 Chapter 3. Ranger™ 3000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 44: Ramp Menu

    Note: Expand is required for various performance tests. B.9 End Menu e.N.D e.N.D When appears, press YES to return to exit the service menu, or No to advance to the CAP menu. Ohaus Corporation www.ohaus.com Ranger™ 3000 Series Service Manual...

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