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Explorer Balances Service Manual

1. Library O Diagnostics Factory Lockout Information Settings Reset 1 7 2 Diagnostics Menu This menu used to access the balances Service Menu and also can be used to verify the operation of some features Level Bubble Light not available in EX12001 EX24001 and EX35001 Q To verify proper operation of the illuminated Level Bubble When selected this light should blink Draft Shield Light Q To verify proper operation of the Draft Shield Light When selected this light should blink Sensors To verify proper operation of each Touchless Sensor When operated each sensor should light and make a sound lt gt Automatic draftshield door To verify proper operation of each Automatic Draftshield Door When operated each door should move automatically Note Only for Automatic draftshield door models Service Menu The Service Menu is intended for use by service personnel A password is required to access this menu Explorer SW 1 10 or OHAUS SW 1 03 onnus The Service menu includes three sub Menus Ramp Span Calibration and Internal Calibration See Appendix B for additional information Explorer Series Service Manual 13 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 8 Securing the Menu and Key Lock menu settings A slide switch is used to secure the Menu Lock and Key Lock menu settings When the switch is set to the ON position the Menu Lock and Key Lock menu settings may
2. TABLE 4 2 REPEATABILITY WORKSHEET n Reading Delta Reading Mean Delta x Delta 1 2 3 4 9 6 7 8 9 10 n number of Reading Mean Sum of readings 10 Delta Reading Mean Standard Deviation Square Root of sum of Delta x Delta 9 5 Add the ten readings and divide the total by 10 to find the Mean average Mean Reading 1 Reading 2 Reading 3 Reading 4 Reading 5 Reading 6 Reading 7 Reading 8 Reading 9 Reading 10 10 Mean 6 Calculate the Delta for each reading and record in the work sheet Delta Reading Mean Calculate the Delta x Delta for each reading and record in worksheet 8 Add the ten Delta x Delta values and divide by 9 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 check environmental conditions ensure that the balance 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 48 Explorer Series Service Manual CHAPTER 4 TESTING Repeatability Test Approved models This test is a variation of the test above Rather than determining acceptance based on the standard deviation of the errors MPE is used The other variation is that 2 series of
3. 2 OHAUS Explorer Balances Service Manual TABLE OF CONTENTS Page No 1 GETTING STARTED 1 1 1 INTRODUCTION 1 1 2 SERVICE FACILITIES 1 1 3 TOOLS AND TEST EQUIPMENT REQUIRED 2 1 4 SPECIFICATIONS 2 1 5 UNIT CAPACITY AND READABILITY 5 1 66 BALANCE OPERATION 8 1 6 1 Overview of the Controls 8 1 6 2 Main Menu and Principal Functions 9 1 6 3 Menu Navigation 9 1 6 4 Changing Settings 10 1 6 5 Functions and Icons 10 1 7 LEGAL FOR TRADE LFT 12 1 8 MENU STRUCTURE 13 1 8 1 User Menu 13 1 8 2 Diagnostics Menu 13 1 9 Securing the Menu and Key Lock menu settings 14 1 10 Display Touch Areas 14 2 DIAGNOSTIC GUIDE 16 2 1 TROUBLESHOOTING 16 2 2 SOFTWARE 16 2 3 DIAGNOSTIC GUIDE 16 3 MAINTENANCE REPAIR PROCEDURES 20 3 1 PREVENTIVE MAINTENANCE 20 3 2 OPENING THE BALANCE 20 3 2 1 Preparation for Opening Explorer Models 20 3 2 2 Opening the Terminal Module 22 3 2 3 Opening the Base Module with a Draftshield 24 3 2 4 Opening the Base Module Top Loader 26 3 2 5 Opening the Base Module EX12001 EX24001 EX35001 28 1 Prepare the balance as instructed above 28 2 Remove the 2 screws that hold the Spider to the Top Housing and lift off the Spider 28 3 Remove the 7 screws that hold the Top Housing to the Base 28 4 Remove the Top Housing 29 3 3 REPLACING THE LOAD CELL not 12001 24001 and 35001 29 3 4 REPLACING THE LOAD CELL 12001 24001 and 35001 35 3 5 REMOVING LOAD CELL PROTECTION SCREWS 36 3 6 REPLACING THE PRINTED CI
4. E F Em gt access other functions Standby Print Applications Sensors AutoCal Menu More Ohaus Corporation www ohaus com 8 Explorer Series Service Manual CHAPTER 1 GETTING STARTED 1 5 2 Main Menu and Principal Functions TABLE 1 3 MENU AND SCREEN NAVIGATION Touch Menu to open the menu list Touch and drag the Scroll bar to view additional items Calibration Touch to view calibration options User Settings Touch to view user preferences Balance Setup Touch to view balance settings Application Modes Touch to view application modes Weighing Units Touch to view weighing units Main Menu Calibration User Settings Balance Setup Application Modes Weighing Units GLP and GMP Data GLP and GMP Data Insert user data for traceability Diagnostics Touch to view library items Communication Touch to view COM Device Settings and Print Settings Factory Reset Touch to view diagnostics list i o Library Lockout Touch to view library items Touch to view diagnostics list I O Settings Information Touch to view library items OD GIS Touch to view list of topics 1 5 3 All menu navigation is performed by touching the display Menu Navigation To enter the Menu touch Menu from any Application Home screen The Main menu appears with buttons for Main Back and Done Continue touching the appropriate lis
5. 170 30041419 SP Power adapter EX HiCap NA 30076295 SP Packaging Assembly EX HiCap NA 30041271 Shipping Box EX HiCap Ohaus Corporation www ohaus com 60 Explorer Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 5 DRAFTSHIELD SPARE PARTS Explorer Series Service Manual 61 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 5 DRAFTSHIELD SPARE PARTS Item Description Part Number 1 Slide Door Top DS EX 30069153 2 Top Cover Backwall EX 83033684 3 PCBA Door Sensor EX 30069155 4 Glass Assy Right EX 83033679 5 Backwall EX 83033681 6 PCBA Motordriver Board EX 30069154 7 Shield Cover Backwall EX 83033682 8 Cable Kit EX 83033656 9 Light Assy DS EX 83033687 10 Hardware DS EX 83033688 11 Glass Assy Left EX 83033678 12 Belt DS EX 30066394 13 Bracket Assy EX 83033625 14 Motor Step DS EX 30069152 15 Glass Assy Front EX 83033677 Ohaus Corporation www ohaus com 62 Explorer Series Service Manual APPENDIX A STANDARD CALIBRATION APPENDIX A USER CALIBRATIONS A 1 SPAN CALIBRATION The InCal system in Explorer balances with will perform a good span calibration as long as there is no damage to the load cell Verification with an external weight should be done if there is a question of the balances accuracy Often any weight variations are due to the inaccuracy of the external
6. 3 2 5 Opening the Base Module EX12001 EX24001 EX35001 1 Prepare the balance as instructed above 2 Remove the 2 screws that hold the Spider to the Top Housing and lift off the Spider 3 Remove the 7 screws that hold the Top Housing to the Base Ohaus Corporation www ohaus com 28 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 4 Remove the Top Housing Explorer Series Service Manual 29 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 3 3 REPLACING THE LOAD CELL not 12001 24001 and 35001 The Load Cell may need to be replaced because of balance instability or because the balance does not calibrate or repeat or because it is physically broken or displays an error code For replacing the load cell on EX12001 EX24001 and EX35001 please see section 3 4 Note Explorer Load Cells are not serviceable in the field due the special tools and test conditions required to ensure that it is working properly No spare parts are available for the Load Cell Module Disassembly 1 Open the balance see Section 3 2 Verify that there is no mechanical interference pinched wire or bad solder connection that may be causing the load cell to appear defective 2 Remove the Load cell Shield by lifting vertically Note the Top Loader models do not have a Load cell Shield Ohaus Corporation www ohaus com 30 Explorer Series Service Manual CHAPTER 3
7. Unit list Index Unit Index Unit 0 g 11 dwt 1 kg 12 mo 2 t 13 msg 3 mg 14 HKt 4 15 SGt 5 ct 16 TWt 6 N 17 tical 7 Ib 18 tola 8 Oz 19 baht 9 ozt 20 10 GN 21 custom_1 22 custom_2 23 custom_3 Explorer Series Service Manual 73 Ohaus Corporation www ohaus com APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 2 RS232 DB9 Pin Connections Pin 2 Balance transmit line TxD Pin 3 Balance receive line RxD Pin 5 Ground signal GND Pin 7 Clear to send hardware handshake CTS Pin 8 Request to send hardware handshake RTS C 3 USB Interface The Ohaus USB Interface is a unique solution to the problem of connecting a balance to a computer using a Universal Serial Bus USB USB devices are categorized into classes such as disk drives digital cameras printers etc Balances do not have a commonly used class so the Ohaus USB interface uses a generic interface based on the RS232 serial standard Data sent from the balance to a computer is in USB format The USB data is directed to a virtual port This port then appears as an RS232 port to the application program When sending a command from a computer to the balance the application program sends a command to the virtual port as if it were an RS232 port The computer then directs the command from the virtual port to the computers USB connector where the balance is connected The port rece
8. 10000g 10000g MPE 0 0019 0 0015g 0 0139 0 019 0 159 og 0 19 Linearity g reference only 0 0002 0 0002 0 003 0 0024 0 03 0 024 0 024 OCL load MPE 100g 100g 200g 500g 2000g 3500g 3500g see Table 4 5 for load 0 001g 0 001g 0 01g 0 005g 0 1g 0 05g 0 05g e a 0 0019 0 001g 0 01g 0 01g 0 19 0 19 0 19 Zero Drift 1e 1 C 5 C 5 C 5 C 5 C 5 C 5 C 5 C Span Sensitivity MPE C max 0 0015g 0 0015g 0 015g 0 01g 0 15g 0 1g 0 1g EX High Capacity Model EX12001 EX24001 EX35001 Capacity max g 12000g 24000g 35000g Readability d g 0 1g Ver Interval e g 1g LFT Class II Repeatability 10 times 1d each load load MPE Linearity g reference only 0 29 Ohaus Corporation www ohaus com 4 Explorer Series Service Manual CHAPTER 1 GETTING STARTED AutoDoor models Model EX124AD EX224AD EX324AD Capacity g 120 220 320 Readability d g 0 0001 0 0001 0 0001 Repeatability g 1d 0 0001 0 001 0 001 Linearity g 2d 0 0002 0 0002 0 0002 ER AR load 0 00045 SS 3009 0 00159 Zero Drift g C 0 0001 0 0002 0 0002 Span Sensitivity g C 0 0001 a A N ExCal models Model EX223E EX423E EX2202E EX4202E EX6202E EX6201E Capacity g 220 420 320 4200 6200 6200 Readability d 9 0 001 0 001 0 0001 0 01 0 01 0 1 Repeatability g 1d 0 001 0 001 0 001 0 01 0 01 0 1 Lin
9. CHAPTER 1 GETTING STARTED f Logout a Used for User logout and return to User Login screen This feature is only active if a user profile has been created 1 6 LEGAL FOR TRADE LFT When the balance is set for LFT on M and N models the following menu settings cannot be accessed changed Calibration Mode and Units Type approved operation may force some balance settings as required by the approval agency In non approved models the Menu lock switch may also limit access to certain menu items based on the Balance lock out settings The Service Menu see section 1 8 2 is not available when the switch is on To regain access to the locked menu settings move the Menu lock switch to the rear which turns LFT off TABLE 1 4 LFT SETTINGS Legal For Trade Use this menu to set the Legal for Trade status OFF standard operation ON operation complies with Weights and Measures regulations When Legal for Trade is set to ON the menu settings are affected as follows Calibration Menu e AutoCal internal Calibration Automatic Calibration and Calibration Test functions are available l e All other functions are hidden a Balance Setup Menu e Stability Indicator Range is locked at 1 Division e Auto Zero Tracking is limited to 0 5 Division and OFF e Auto Tare and Gross Indicator are locked at their current setting e Graduations is locked at 1 Division Communication Menu e Stable Weight Only is locked ON e Nu
10. MAINTENANCE PROCEDURES 4 Remove the Load Cell remove the 4 load cell screws from the bottom housing Lift the Load Re Assembly Reverse the disassembly procedure to assemble the balance Ensure that there is no foreign material between the Base mounting surfaces and the Load cell Take special care to route the wires and cables as shown in the following pictures Proper routing is important for RFI ESD performance Ensure that the wires or cables are not pinched during re assembly InCal cable routing Draftshield models 13 connect the incale cable with the interface of the main PCB Explorer Series Service Manual 31 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES Load cell cable routing Draftshield models 10 fold the cable beside the main PCB at the third time at the length of at about 3 centimeter and bend about 1cm at the fourth time El Et WSL op 11 Insert the bended loadcell cable into the space between film and bottom 11 e EN Ohaus Corporation www ohaus com 32 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES InCal cable routing Non Draftshield models Nipper non small foot side 7 Put the cable into the slot using nipper and make sure the cable not cover the screw hole Nipper Explorer Series Service Manual 33 Ohaus Corporation www ohaus com CHAPTER 3 M
11. are shown in bold The calibration setting can be changed to allow the other choices Explorer Series Service Manual 45 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 2 OPERATIONAL TEST 1 Connect a functioning Power Adapter to the balance 2 Plug the Power Cord into a suitable power source 3 Verify that the balance start up sequence occurs properly Note any error codes 4 3 LOAD CELL TEST USING RAMP To test the Load Cell using RAMP see Appendix B 4 4 PERFORMANCE TESTS Accurate performance of the Explorer balances is determined by a series of four performance tests The displayed readings are compared with the tolerances listed in Tables 1 1 Tolerance values are expressed in counts A one count difference is shown in the last digit on the balance display The following performance tests are used to evaluate balance operation before and after repairs The balance must meet the requirements specified in each test as well as the specifications listed in Table 1 1 Before proceeding with the following tests the balance should be warmed up 60 minutes and calibrated See Appendix A 4 4 1 Precision Test The Precision Test is a quick test that measures the deviation of a limited number of weight readings If the balance passes the precision test than the following tests should be performed Note This is a reference test for approved models OIML and NTEP It is not a required test but it can be used to dete
12. calibration weights be used Calibration points are done at approximately 0 50 and 100 of maximum capacity After the linearization procedure the balance will automatically start a Service Span calibration and then a Service Internal Calibration The sequence of loading the test weights on the platform is very important to insure a correct linearity calibration Refer to the diagram below for the correct weight sequence Remove Clrear weights pan No 1 Push full load load load Remove weights weights No 2 No 2 1st half j 2st half __load Iy __ load load Clrear Load full weights Pan capacity No 1 push 1st zero 2nd zero End 2810 Explorer Series Service Manual 67 Ohaus Corporation www ohaus com APPENDIX B SERVICE MENU 5 Point LINEARITY CALIBRATION A five point linearization is rarely required and is the most difficult to perform accurately under the less than ideal conditions outside the factory This service calibration requires that accurate calibration weights be used Calibration points are done at approximately 0 25 50 75 and 100 of maximum capacity The sequence of loading the test weights on the platform is very important to insure a correct linearity calibration Refer to the diagram below for the correct weight sequence Load each numbered weight or group of weights if required in the order indicated No 1 No 2 No 3 No 4 then remove in the correct order No 1 No 4 No 2 No 3
13. calibration weight rather than a calibration error with the InCal system Touch Internal Calibration to initiate a calibration using the internal weight If an external calibration is required due to the customer s audit system follow the procedure in the Instruction Manual or the copy below See Section 4 1 for Calibration Masses required for each model Note This menu is locked out in Legal for Trade applications To regain access see Section 1 7 E AE D EN Menu gt Calibration gt Span Calibration With the balance turned ON and no load on the pan touch Menu then Calibration and then Span Calibration to initiate the procedure When complete the display shows the Span calibration status and returns to the current application Note To change the span calibration point touch the alternate weight shown on the display Follow the screen instructions and place the specified calibration weight on the scale when prompted to do so NOTE If calibration fails ensure that the test area is free from drafts and the surface the balance rests on is level and free of vibrations 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 Be careful not to touch the balance or the table while calibration is in progress as it will cause the process to fail Explorer Series Service Manual 63 Ohaus Corporation www ohaus com APP
14. calibrations A password is required to access this menu The current password is Explorer SW 1 10 and OHAUS SW 1 03 Software in the initial production units may not have all of the service items shown yr Uo 2 4 Cc Diagnostics gt Service Mode Cc SSS Menu Ramp 3 3P Servi gt Gees 5 Et 3P Service Linearization L gt y Internal Weight Calibration gt Service Span Calibration Service Internal Calibration Internal Repeatability Test em Balance Info OHAUS C gt Exit Service Mode 66 Explorer Series Service Manual Ohaus Corporation www ohaus com APPENDIX B SERVICE MENU RAMP The ramp display shows the percentage of use of the A to D circuit that is of the temperature compensated duty cycle The actual value is not as important as how it changes It should increase as the weight on the balance is increased The ramp display should remain constant without fluctuations The normal range is within 3 to 97 If the readings are outside this range the load cell is likely bad Fluctuations in the display may indicate a mechanical interference a cable connection problem a damaged Main PCB or a damaged load cell 3 Point LINEARITY CALIBRATION A three point linearization is also rarely required and is difficult to perform accurately under the less than ideal conditions outside the factory This service calibration requires that accurate
15. cell poor ot Internal mechanical interference venye pan Support is not contacting repeatability the top housing Explorer Series Service Manual 17 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE Bad load cell Replace load cell Unlock see User manual Unstable environment vibration air Move balance to suitable location allow currents or changing temperature balance to stabilize its temperature Cannot calibrate Use correct mass value as shown on the scale or enter the known mass value as instructed on the scale External Calibration mode incorrect calibration masses used Incorrect weight reading or poor See Incorrect weight reading and Poor repeatability repeatability Cannot change Sub menu locked Unlock sub menu ent gaung LFT set to on Turn LFT off Cannot access a Enter Main Menu then Application Modes Desired Mode not enabled Mode to set the appropriate mode on Cannot access a e Enter Main Menu then Weighing Units to Unit Desired unit not enabled set the appropriate unit on Balance communications settings do RS232 USB or not match with the settings in the See User Manual for proper settings Ethernet connected computer interface not Poor Cable connection Check cable connection working Defective Interface or cable Replace Low Reference Increase reference weight or continue with Reference weight is too small weight less accurate results Invalid Piece Parts count
16. g 0 001 0 001 0 01 0 01 0 1 0 1 0 1 LFT Class ll ll Repeatability 10 times 1909 0 001g 150g 0 0019 200g 0 01g 500g 0 005g 20009 0 1g 50009 0 05g 5000g 0 05g 300g each load load MPE 2009 0 0019 0 00159 400g 0 015g 1000g 0 01g 4000 0 15g 10000g 0 1g 10000g 0 1g Linearity g reference only 0 0002 0 0002 0 003 0 0024 0 03 0 024 0 024 OCL load MPE 100g 100g 200g 500g 2000g 3500g 3500g see Table 4 5 for load 0 001g 0 001g 0 01g 0 005g 0 1g 0 05g 0 05g 0 001g 0 001g 0 01g 0 01g d o o Zero Drift 1e 1 C 1 C 1 C 1 C 1 C 0 1g 1 C 0 1g 1 C 0 19 1 C SE 0 0015g 0 0015g 0 0159 0 019 0 15g 01 0 1 MPE IC max i i i i i d d Explorer Series Service Manual 3 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED EX NTEP MC Type Approved These models must meet all NTEP and Canadian Weight amp Measures requirements Model EX224N EX324N EX423N EX1103N EX4202N EX10202N EX10201N Capacity g 220 320 420 1100 4200 10200 10200 Readability d g 0 0001 0 0001 0 001 0 001 0 01 0 01 0 1 Ver Interval e g 0 001 0 001 0 01 0 01 0 1 0 1 1 LFT Class ll ll ai 100g 200g 500g 2000g 5000g 5000g Repeatability 10 0 0019 Sg 0 0039 Dig 0 059 0 059 er 200g 300g 400g 10009 4000g
17. 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 TABLE 2 1 DIAGNOSTIC GUIDE Symptom Possible Cause Remedy Cannot exit Standby Mode possible software lock up Cycle the power off then on No power to the Adapter Verify input voltage to the Power Adapter Verify the Power Adapter output voltage Bad Power Adapter using a DVM Cannot turn on Verify 12VAC at the Power Jack wire Input Jack or internal wiring is defective connection to the PCB Bad connection between terminal and Re connect base and terminal base Defective Base Main PCB Replace base Main PCB see Section 3 4 2 Software lock up Cycle the power off then on Touch Panel defective Replace see Section 3 6 Touch Panel controls do not Bad touch panel calibration Enter main menu to re calibrate touch respond panel see Appendix A Defective Terminal Main PCB Replace Terminal Main PCB see Section 3 4 1 Improper calibration Perform span calibration Poor linearity performance Perform linearity calibration l Unstable environment vibration air Move balance to suitable location allow Incorrect weight bilize i reading currents or changing temperature balance to stabilize its temperature Internal mechanical interference verify the pan Support is not contacting the top housing Bad load cell Replace load
18. tests The Analytical models need up to 4 hours to stabilize NOTE Make sure the test area is free from drafts and that the balance rests on a level and vibration free surface The Analytical models especially need a solid platform such as a stone table 4 1 TEST MASSES REQUIRED The masses required to test the Ohaus Explorer balances must meet the requirements of the ASTM or OIML Tolerances listed in the table Poor quality calibration masses be the can cause of frustrating diagnostics TABLE 4 1 CALIBRATION MASS VALUES Model Span Calibration Points Weight Class EX124 50g 100g ASTM Class 1 OIML E2 EX224 100g 150g 200g ASTM Class 1 OIML E2 EX324 M N 150g 200g 300g ASTM Class 1 OIML E2 EX223 100g 150g 200g ASTM Class 1 OIML E2 EX423 200g 300g 400g ASTM Class 1 OIML E2 EX623 300g 400g 500g 600g ASTM Class 1 OIML E2 EX1103 M N 500g 1000g ASTM Class 1 OIML E2 EX2202 1000g 2000g ASTM Class 1 OIML E2 EX4202 2000g 3000g 4000g ASTM Class 1 OIML E2 EX6202 3000g 4000g 5000g 6000g ASTM Class 1 OIML E2 EX10202 M N 5000g 10 000g ASTM Class 1 OIML E2 EX6201 3000g 4000g 5000g 6000g ASTM Class 2 OIML F1 EX10201 5000g 10 000g ASTM Class 1 OIML E2 EX12001 3000g 5000g 10000g 12000g ASTM Class 2 OIML F1 EX24001 10000g 15000g 20000g ASTM Class 1 OIML F1 24000g EX35001 10000g 20000g 30000g ASTM Class 1 OIML F1 35000g Note Factory default settings
19. the Back Plate Ohaus Corporation www ohaus com 24 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES Remove the two Rear Support screws S Remove the Rear Support being careful to route the Light and Motor Cable through the holes in the Support Turn the base over and remove the two remaining screws that hold the Top Housing to the Base 8 Turn the Module over Remove the Top Housing being careful to route the Light Cable and Motor Cables if equipped through the holes in the Upper Housing Explorer Series Service Manual 25 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 9 Disconnect the Bubble Light Cable from the Connect PCBA The Top Housing can now be separated 3 2 4 Opening the Base Module Top Loader Prepare the balance as instructed above 2 Turn the base on its side and remove the 4 screws that hold the Top Housing to the Base Do not turn the Base completely over as the weight of the Base will rest on the Load cell possibly causing damage Ohaus Corporation www ohaus com 26 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 Turn the base back on its feet and remove the Top Housing Lay the Top Housing alongside so that the Bubble Level Light wiring can be disconnected Explorer Series Service Manual 27 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES
20. 001 EX35001 e Disconnect the cables along A HK Di 8 e Bee Aen mr ts Fa HN N i 2 the top edge of the PCB Top edge connectors Real Time Clock battery Loosen the 2 retaining screws on each side of the PCB with approximately 2 turns e Rotate the retaining washers so that it no longer engages the PCB slide out the PCB Re install Reverse the procedures to re install the PCBAs See Appendix C for instructions on how to use the software Service Tool to configure the new PCBA to the balance Explorer Series Service Manual 41 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 3 7 Replacing the Function Label If only the Function Label is damaged the Touch Panel does not need to be replaced See Chapter 5 for parts information e Remove the old label Working from a corner use a broad blade such as a wide X Acto knife to remove the label Be careful not to cut into the plastic Housing or into yourself Work slowly allowing the adhesive time to release as it is separated from the plastic Eye Protection should always be used when using a knife e Clean the glue residue from the Housing surface Try using a section of the adhesive on the removed label to pickup as much of the remaining adhesive on the housing as possible Using the knife or your fingers try to roll up the remaining adhesive If the adhesive smears use a cotton cloth to pick up as muc
21. 00g 2500g 5000g 7500g EX12001 1500g 1500g 3000g 7500g EX24001 5000g 5000g 10000g 17500g EX35001 5000g 5000g 10000g 25000g NOTE All masses are nominal values Be certain to use the same reference mass throughout the procedure 1 Place the Reference Mass on the Balance record the weight and remove 2 Place Load 1 on the Balance and press TARE 3 Place the test mass on the Balance record the weight and remove 4 Place Load 2 on the Balance and press TARE Explorer Series Service Manual 49 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 5 Place the test mass on the Balance record the weight and remove Place Load 3 on the Balance and press TARE 6 7 Place the test mass on the Balance and record the weight 8 The difference in the weights of the test mass should be within the tolerance in Table 4 2 If the differences are out of tolerance verify the test conditions and repeat the test 9 Ifthe Balance remains out of tolerance the Load Cell may need to be replaced 4 4 4 Off Center Load Test The Off Center Load Test is used to determine whether displayed weight values are affected by moving the sample to different areas of the Pan OCL test may also be referred to as a Shift Test NTEP or an Eccentricity Test OIML The test weight used in this test 1 3 the capacity of the balance See table for the test weight values TABLE 4 4 OFF CENT
22. 15746 4 11879 6 08013 10 7873 0 000001 0 000001 0 00000 0 0000 4 23287 11 28766 21 86985 38 8013 0 00000 0 00000 0 0000 600 000 1600 00 5500 00 0 00 0 000 0 00 1851 88 4938 35 16975 6 0 00 0 00 0 0 26 03985 47 73975 69 43965 238 699 0 0000 0 0000 0 000 7 91557 14 51187 21 1081 72 559 0 0000 0 0000 0 000 Be e ees eee Ee EN e ees 10 2882 27 4353 94 308 0 0000 0 0000 0 000 0 000 0 000 120000 320000 22000 42000 110000 0 0 _ gt e a a a i Olm e ele x Q ajo O N CH ol CH E OZ 2 N O 3 a a alan custom 3 oO 2 oO co CO besi Es ech d air Q D Ohaus Corporation www ohaus com 6 Explorer Series Service Manual CHAPTER 1 GETTING STARTED EX2202 EX4202 EX6202 EX10202 EX6201 EX10201 EX12001 EX24001 EX35001 0 0 4 8501 0 0000 1414 63 2700 66 3986 69 6558 75 3986 7 65588 7716 2 154324 22506 0 Q Q S 3 n 2 0 0 Hk 58 770 112 2125 165 6470 272 5160 165 645 272 515 320 64 641 26 935 20 oa 0 00 Sing 58202 0 00 ROT 58 866 272 000 0 00 0 000 134 72 379 685 624 643 379 6 0 00 0 00 0 0 2 2000 10 20000 6 200 0 0000 0 0000 0 000 oO a oa OO oi x 2 5 O d ech 1 70 731 327 9375 199 335 327 940 385 809 771 618 1 125 276 0 0005 0 0005 0 0005 0 0005 one one ou 0 005
23. AINTENANCE REPAIR PROCEDURES Load cell cable routing Non Draftshield models 9 insert the bended cable into the clip 10 Use the clip fixture to fix the cable on the cut of the bottom Pic 11 Bend the cables refer to below pic See Appendix C for instructions on how to use the software Service Tool to configure the new load cell to the balance Ohaus Corporation www ohaus com 34 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 4 REPLACING THE LOAD CELL 12001 24001 and 35001 The Load Cell may need to be replaced because of balance instability or because the balance does not calibrate or repeat or because it is physically broken or displays an error code Note Explorer Load Cells are not serviceable in the field due the special tools and test conditions required to ensure that it is working properly No spare parts are available for the Load Cell Module Disassembly 1 Open the balance see Section 3 2 Verify that there is no mechanical interference pinched wire or bad solder connection that may be causing the load cell to appear defective 2 Turn the base on its side and remove the 3 screws that hold the Load Cell to the Base Do not turn the Base completely over as the weight of the Base will rest on the Load cell possibly causing damage Note Make sure to hold on to the load cell with one hand when unscrewing the last sc
24. BOARD ASSEMBLIES PCBA Before working with the exposed PCBAs appropriate ESD protection must be taken to prevent damage to the sensitive electronic components It is recommended that a conductive mat with wrist straps be used when working with electronic components 3 2 5 Terminal 1 Open the Terminal Module see Section 3 2 2 Remove the accessory module if equipped Remove the 2 retaining screws in the mounting plate e Slide out the module 3 Remove the Interconnect PCBA Disconnect the speaker connector from the Connector PCB remove the 4 mounting screws and a the PCBA forward and up to remove Explorer Series Service Manual 37 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES Unlock the LCD ribbon cable connector see Opening the Terminal Module Removing the cable Disconnect the Touch Panel flex cable by sliding the black release Remove the cable from the connector Remove the 4 mounting screws and lift out the Terminal Main PCBA above 6 Remove the LC Display by simply lifting it out Ohaus Corporation www ohaus com 38 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 2 6 Base 1 Open the Base Module see Section 3 2 CR Connect PCBA FI 2 Remove IR Sensor PCBAs The left and right PCBAs are identical The PCB is symmetrical about its length so that the Indicator LED is able to be mounted forwards o
25. ENDIX A USER CALIBRATIONS A 2 LINEARITY CALIBRATION The Explorer balances do not have user linearity calibration Section 4 4 4 has the procedure to determine if the balance linearity is within specification See Appendix B for the Service Linearization procedures A 3 TOUCH SCREEN CALIBRATION The Touch Screen needs to be re calibrated if the screen does not respond correctly to intended commands A Touch Screen calibration is required if the Touch Screen or Main PCBA is replaced e Ca N Menu gt User Settings gt Display gt Touch Calibrate Settings With the balance turned ON touch Menu then User Settings then Display Settings and then Touch Calibrate Touch Calibrate Touch the screen at the center of the ring O Press here First top left then bottom right Ohaus Corporation www ohaus com 64 Explorer Series Service Manual APPENDIX B SERVICE MENU APPENDIX B DIAGNOSTIC SERVICE MENU This appendix describes the Diagnostic Menu and the limited access Service Menu From the main screen touch Menu scroll down then touch Diagnostics to enter the menu B 1 User Accessible Diagnostics The first three selections can be accessed by the user The Service Menu is only to be used by Service Technicians and is discussed in the next section yr E Y Menu gt Diagnostics gt Level Bubble Light 7 Draft Shield Light Analytical models a gt Sensors OHA
26. ER LOAD MASS VALUES Model OCL Mass Value Notes EX124 50g 1 The class of the weight used in EX224 100g OCL testing is not critical EX324 M N 100g f EX223 100g 2 Use large weights where possible Smaller weights can be EX423 200g stacked on the larger but a stability EX623 200 problem may occur if many EX1103 M N 500g smaller weights are used If E 1008 ee EX4202 20009 es ait y EX6202 2000g EX10202 MN 3500g EX6201 2000g EX10201 3500g EX12001 4000g EX24001 8000g EX35001 12000g The test positions A D must be centrally located in each segment Round Pan Rectangular Pan Ohaus Corporation www ohaus com 50 Explorer Series Service Manual CHAPTER 4 TESTING Procedure 1 oN oar wn Set AZT Auto Zero Tracking to off This setting is located in Menu Balance Setup AZT menu Place the test weight in the center of the Weighing Pan Tare the balance Move the weight to location A and record the reading when stability indicator comes on Move the weight to location B and record the reading Move the weight to location C and record the reading Move the weight to location D and record the reading Maximum allowable change in displayed weight readings for each of the four positions can be found in Specifications Tables Chapter 1 If this maximum is exceeded verify the test conditions and retest the balance If there is no improvement the load cell must be replaced Note In hi
27. Mode Exits the Service Mode and returns to Normal Mode Explorer Series Service Manual 69 Ohaus Corporation www ohaus com APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS APPENDIX C SERVICE TOOL The Software Service Tool Part Number 83032124 is required when a main PC Board is replaced in a Explorer balance It is used to re configure the balance to its original parameters in the case of a PCB replacement The tool can also be used to communicate with the balance using commands that are listed at the end of the appendix The latest software service tool and support files are available on the Ohaus DMX site Please read the Service Tool Instruction Manual Part Number 30032352 which is also available on Ohaus DMX site Ohaus Corporation www ohaus com 70 Explorer Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 1 Balance Commands The balance commands are used to send instructions to the balance Commands listed in the following table will be acknowledged by the balance The balance will return ES for invalid commands TABLE C 1 INTERFACE COMMAND LIST Command Function IP Immediate Print of displayed weight stable or unstable Attention when LFT ON IP could only print stable displayed weight p Print displayed weight according to Stable only setting in the communication m
28. RCUIT BOARD ASSEMBLIES PCBA 37 3 2 5 Terminal 37 3 2 6 Base 39 3 7 Replacing the Function Label 42 3 8 Replacing the Touch Panel 43 3 9 Replacing the Feet 43 4 TESTING 45 4 1 TEST MASSES REQUIRED 45 4 2 OPERATIONAL TEST 46 4 3 LOAD CELL TEST USING RAMP 46 4 4 PERFORMANCE TESTS 46 Ohaus Corporation www ohaus com i Explorer Service Manual TABLE OF CONTENTS 4 4 1 Precision Test 4 4 2 Repeatability Test non approved models 4 4 3 Repeatability Test Approved models 4 4 4 Linearity Test 4 4 5 Off Center Load Test 5 PARTS LISTS amp DIAGRAMS 5 1 TERMINAL SPARE PARTS 5 2 BASE SPARE PARTS Non Draftshield models 5 3 BASE SPARE PARTS Draftshield models 5 4 BASE SPARE PARTS EX12001 EX24001 EX35001 5 5 DRAFTSHIELD SPARE PARTS APPENDIX A USER CALIBRATIONS A 1 SPAN CALIBRATION A 2 LINEARITY CALIBRATION A 3 TOUCH SCREEN CALIBRATION APPENDIX B DIAGNOSTIC SERVICE MENU B 1 User Accessible Diagnostics B 2 Service Sub Menu APPENDIX C SERVICE TOOL C 1 Balance Commands C 2 RS232 DB9 Pin Connections C 3 USB Interface APPENDIX D FIRMWARE UPGRADE VIA USB Explorer Service Manual ii Ohaus Corporation www ohaus com TABLE OF CONTENTS LIST OF TABLES TABLE NO TITLE Page No 1 1 eene e 2 1 2 Capacity and REAGAN EEN 5 1 3 Menu and Screen Navigation um 2422024444400R0 RnB annnnnnnnnnsnnnnanannnnnnnannnnn namen nn 8 1 4 LIF Tie QUIS I a E 11 1 5 Explorer User Mett ege tee nee 12 2 1 Diagnost
29. S Item Description 1 Pan 90mm 1 Pan 130mm 2 Pan Support 130mm 3 Wind ring 90mm 4 EMC Plate DS 5 Top Housing DS 6 IR Sensor PCBA 7 Base 8 Latch Front Panel 9 Level Bubble 10 Main PCBA 11 Connect PCBA 12 Load cell Cover 13 Load cell 16 Foot Kit 18 Cable Kit not all shown 20 Hardware Kit not all shown Not shown Box DS Not shown Packaging Complete DS Ohaus Corporation www ohaus com 58 Explorer Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 4 BASE SPARE PARTS EX12001 EX24001 EX35001 Explorer Series Service Manual 59 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 4 BASE SPARE PARTS EX12001 EX24001 EX35001 Drawing Item Part Number Description 10 30076252 SP MFR Loadcell 35kg EX HiCap 20 30076187 SP Pan support Assembly EX HiCap 30 30076188 SP Screws kit EX HiCcap 40 30076189 SP Cables kit EX HiCap 50 30076250 SP PCBA LFT EX HiCap 70 30076276 SP Adjuatable foot EX HiCap 90 30076186 SP Larger Pan EX HiCap 100 30041267 SP Power Cord US EX HiCap 110 30041462 SP Power Cord EU EX HiCap 120 30041463 SP Power Cord CN EX HiCap 130 30041464 SP Power Cord UK EX HiCap 140 30041465 SP Power Cord AU EX HiCap 150 30041466 SP Power Cord JP EX HiCap 160 30041469 SP Power Cord KR EX HiCap
30. This is done to reduce the affect of the individual weight inaccuracies on the linearity calibration Remove Clrear weights pa No 1 Push aa Te load capacity load I Remove weights weights No 4 No 4 34 314 load Capacity capacity Remove weights weights No 3 No 2 1 2 1 2 d capacity load Capacity Remove weights weights No 2 No 3 1 4 1 4 capacity capacity load Cirear Load full weights Pan capacity No 1 push 1st See zero 2nd zero End INTERNAL WEIGHT CALIBRATION Internal weight calibration in the Service Menu is used to determine the balance s internal weight This establishes a ratio between the internal weight and an external calibration weight SERVICE SPAN CALIBRATION Service span calibration allows a new zero and maximum setting using an external calibration weight SERVICE INTERNAL CALIBRATION The internal calibration weight is used to calibrate the balance If a pan pan support or load cell is changed a Service Span Calibration or Service Internal Calibration should be done Ohaus Corporation www ohaus com 68 Explorer Series Service Manual APPENDIX B SERVICE MENU INTERNAL REPEATABILITY TEST The internal weight is used to determine the repeatability of the load cell The standard deviation is determined after 10 cycles of the internal weight TABLE B 1 SERVICE CALIBRATION MASS VALUES Model Span 3 P Lin 5 P L
31. US gt Service Menu Level Bubble Light To verify proper operation of the illuminated Level Bubble touch the icon and the light should blink If the light does not blink verify that the wiring is okay Check for the evidence of pinched wiring as this is a likely cause If the wiring is okay verify the voltage 3 3 VDC at the LED connector pins on the PCBA Draft Shield Light Analytical models To verify proper operation of the Draft Shield Light touch the icon and the light should blink If the light does not blink verify that the wiring is okay Check for the evidence of pinched wiring as this is a likely cause If the wiring is okay verify the voltage 5 VDC at the connection pins on the DS Light PCBA Sensors This tool is used to verify proper operation of each Touchless Sensor When operated each sensor should light and make a sound If the sensor is not operating verify the wiring is okay Check for the evidence of pinched wiring as this is a likely cause If the wiring is okay verify that voltage 3 3 VDC is reaching the Sensor PCBA pins 2 and 4 Service Menu The Service Menu is intended for use by service personnel only A password is required to access this menu see the next section Explorer Series Service Manual 65 Ohaus Corporation www ohaus com APPENDIX B SERVICE MENU B 2 Service Sub Menu The Service sub menu allows authorized service personnel to monitor Ramp or perform a variety of service weight
32. When AutoCal is ON the balance performs a self calibration following a temperature change of 1 5 C for 4 place and 3 place models and 6 5 C for for 2 place balances or every 11 hours Touch AutoCal to change the status Default status is ON Note Not available in ExCal Menu z Touch Menu to enter the balance s menu list l More a Touch More to access Level Assist Zero Tare Units Pretare Cal Test Calculator and gt Fe Stopwatch Zero Operation gt 4 Remove the load from the pan and touch Zero to set the display to zero When weighing pan is empty the gt 0 lt indicator turns on when the measurement is within division d of the zero setting Note The balance also features Auto Zero Tracking AZT that automatically maintains a Center of Zero within the tolerances set in the AZT menu see Balance Settings Weighing Units g k The balance can be configured to measure in a variety of weighing units including three 3 MO custom units Touch Units to choose from the displayed list Scroll down to see all options o Note The active weighing Unit can also be accessed by touching the unit area of the Main Display line If a unit is not displayed in the list it must first be turned on via the User Menu CR Taring a Container Taring sets the weight of a container as zero so only the weight of objects held in the container or net weight is displayed Manual Tare Place the empty contain
33. Xon Xoff RTS CTS Note Print and USB menu selections may END vary between the different balance series Yes No Explorer Series Service Manual 75 Ohaus Corporation www ohaus com APPENDIX D FIRMWARE UPGRADE VIA USB APPENDIX D FIRMWARE UPGRADE VIA USB From version 2 00 the Explorer firmware can be upgraded via a USB flash drive The whole process takes less than 10 minutes Please follow below steps to upgrade the firmware using a USB flash drive STEPS 1 Copy the EX FWUPD folder to the root directory of the USB flash drive Note Do not change the folder name It needs to be EX_FWUPD ESCH gt Computer Removable Disk E gt Organize v 3 Open Share with v Burn New folder Sir Favorites Name Date modified Type Size EE Desktop jo EXLFWUPD 2013 6 19 14 05 File folder E Downloads 1 New folder 2013 8 1 17 18 File folder Recent Places The EX_FWUPD folder contains three files Base mot image file for the base unit setup ini setup file Terminal bin image file for the terminal unit Note Do not change any of the file names O9 d gt Computer gt Removable Disk E gt EX_FWUPD Organize v Open v Burn New folder z x Kees Name Date modified Type Size HE Desktop _ Base mot 2013 7 30 17 15 MOT File 641 KB d Downloads 42 setup ini 2013 7 30 17 20 Configuration sett 1 KB Recent Places Terminal bin 2013 8 1 16 26 BIN Fil
34. able 3 2 2 Opening the Terminal Module 1 Remove the Terminal Bracket from the Terminal Module Press the two Angular Adjust Buttons to allow the Terminal Bracket to swing free Flex the bracket it at its center to release one hinge pivot at a time Terminal Release Buttons Terminal Bracket _ Angular Adjust Buttons Foot Slide hinge pivot out of hole lt Side View Flex center of bracket down 2 Remove the 4 screws securing the Terminal Top and Bottom Housings Screws that secure the housings Ohaus Corporation www ohaus com 22 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 Turn the module over and open the upper housing Be careful not to pull on the cables 4 Disconnect the ribbon cable connecting the two assemblies Using a finger nail or a thin screw driver blade rotate the black cable lock on the connector 90 so that it is perpendicular to the cable ee es TZ TEE pate FAN 2 4 Connector locked Connector released Connector release position lock parallel to the cable lock 90 to the cable shown without cable Explorer Series Service Manual 23 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 3 2 3 Opening the Base Module with a Draftshield 1 Prepare the balance as instructed above 2 Remove the EMC Screw and Plate from the Base 3 Remove the Back Plate Screws that secure
35. and the Base modules The software revision in the balance can be seen when the balance is in standby mode or during the power up sequence The software version is displayed in the lower right hand corner of the screen The screen will show Model number for example Explorer EX6201 Capacity and readability 6209g x 0 1g Software Revision Terminal Base Version 1 00 0 14 The balance software can also be retrieved by sending a PV command via the RS232 or other interface See Appendix C for the software upgrade procedure Check the Service Bulletins on the Ohaus DMX site for information on software upgrades 2 3 DIAGNOSTIC GUIDE Diagnostic Guide designed to help locate the problem area quickly and easily The probable causes are listed with the most common cause first If the first remedy does not fix the problem proceed to the next remedy Before attempting to repair the balance read all chapters of this manual to be familiar with the balance components and operation Ohaus Corporation www ohaus com 16 Explorer Series Service Manual CHAPTER 2 DIAGNOSTIC GUIDE Diagnosis 1 Isolate and identify the symptom 2 Refer to Diagnostic Guide tables and locate the symptom 3 Follow the suggested remedies in the order they appear 4 Perform the indicated checks or see the appropriate section of the manual 5 Repair or replace the defective section of the balance NOTE If more than one symptom is
36. be viewed but not changed This switch is located under the Base Set the position of the switch to ON by sliding the external Lock Switch to LOCKED When the switch is in the ON position the start up display includes the LOCK ON message Note This switch is also used in conjunction with the Legal for Trade menu item When the Legal for Trade menu is set to ON the switch must be set to the ON position to prevent calibration and changes to metrologically significant settings Co _ Explorer Switch Explorer High Capacity EX12001 EX24001 EX35001 1 9 Display Touch Areas The display touch areas that are active will change with the screen layout Button areas will always be active but some areas will require familiarity with the Explorer man machine interface Application with Single line Weighing 10w x 14h mm Capacity Guide Edit Settings 16w x 15h mm Ohaus Corporation www ohaus com 14 Explorer Series Service Manual CHAPTER 1 GETTING STARTED Application with Two lines en es 10w x 14h mm Capacity Guide 60w x 5h mm Edit Settings F v wu H wiem A fly gt u Standby Print Zero Sensors AutoCal Menu More Application with Two lines and Message d s Formulation v Library Place component 1 Press Accept 10w x 14h mm 95w x 14h mm u 60w x 5h Note If text area is grayed out button cannot be selected Explorer Series Service Manua
37. beneath the Pan 2 Clean the outside of the balance using a damp cloth with warm water 3 Check the Power Cord for broken or damaged insulation 4 Make a visual inspection for faulty connectors wiring and loose hardware CAUTION DO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE BALANCE S FINISH 3 2 OPENING THE BALANCE Opening the Explorer balance varies slightly according to the specific model as detailed below Use these procedures in order to replace the Load Cell the Printed Circuit Board or other components Common hand tools are sufficient to disassemble the Explorer balances 3 2 1 Preparation for Opening Explorer Models 1 Turn the balance off and unplug the power cord before you begin 2 Disconnect any communication or other option cables Ohaus Corporation www ohaus com 20 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 Draftshield models remove the Top and Side Doors and the Front Panel uf EX12001 EX24001 EX35001 Explorer Series Service Manual 21 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 5 Detach and disconnect the Indicator module To detach press both the Release buttons inward both at the same time and gently pull the Terminal towards you outward until the Terminal is detached Disconnect y lt Release Button Base and Terminal Terminal C
38. e 9 008 KB Turn on the balance and connect the USB flash drive to the USB host slot on the back of the terminal Ohaus Corporation www ohaus com 76 Explorer Series Service Manual APPENDIX D FIRMWARE UPGRADE VIA USB 3 Goto User Menu gt Diagnostics Data Maintenance Software update 4 Press Start button to start the upgrade process Note Keep the USB flash drive connected and make sure the power is balance power is ON during the entire upgrade process Explorer Series Service Manual 77 Ohaus Corporation www ohaus com APPENDIX D FIRMWARE UPGRADE VIA USB 5 Wait approximately 10 minutes for the process to finish 6 Restart the balance Ohaus Corporation www ohaus com 78 Explorer Series Service Manual OHAUS Ohaus Corporation www ohaus com 8 3 0 3 4 2 3 4 P N 83034234 C 2013 Ohaus Corporation all rights reserved 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 Material in this manual is subject to change
39. earity g 2d 0 002 0 002 0 02 0 02 0 02 0 1 EE T aaea o E 0 045 0 045 0 35 Zero Drift g C 0 001 0 001 0 0002 0 01 0 01 0 1 Span Sensitivity g C 0 001 0 001 We 0 01 0 01 0 1 0 001g Note MPE Maximum Permissible Error Wee For loads m in verified units e Class Class Il 0 5e O lt m lt 50 000 O lt m lt 5000 t1e 50 000 lt m lt 200 000 5000 lt ms20 000 1 5e 200 000 lt m 20 000 lt ms1000 000 Maximum errors for balances in usage are twice the acceptable errors for initial verification Explorer Series Service Manual 5 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED UNIT CAPACITY AND READABILITY The capacity and readability of the available units of measure are listed in Table 1 2 TABLE 1 2 UNIT CAPACITY Max AND READABILITY d CH grams 120 000 0 000 na nal nai 0 485015 0 925940 1 366865 2 425085 nal ns n a 0 000005 0 000005 0 000005 0 000005 77 161 205 7648 141 463 270 066 398 669 707 316 0 0001 0 0001 0 000 3 206070 5 87795 8 54952 0 000005 0 000005 0 00000 3 174655 5 820205 8 46575 0 00000 0 00000 0 00005 mor 3 20000 8 53333 29 3333 0 00000 0 00000 0 0000 7 3487 19 5966 67 363 0 0000 0 0000 0 000 Na 1 10000 Na 0 00000 3 86809 10 28824 35 3658 0 00000 0 00000 0 0000 32 00000 58 6665 85 3335 58 6665 112 0000 165 3335 293 333 0 000 0 0000 0 000 1 176798 2 157463 3 138128 2
40. egment display test performance tests and adjustments Chapter 5 Drawings and Parts Lists Contains exploded views of Explorer balances identifying all serviceable components Appendix A User Calibrations Explains user calibration procedures that may need to be performed during service Appendix B Service Calibration Describes the Service Menu and sub menus which allow authorized service personnel to see Ramp readings and perform service calibrations Appendix C Software Service Tool Instructions Used to re configure the balance after replacing a Printed Circuit Board or Load cell 1 2 SERVICE FACILITIES To service a balance the service area should meet the following requirements e Should be temperature controlled and meet balance specifications for temperature environmental requirements e Must be free of vibrations such as fork lift trucks close by large motors air currents or drafts from air conditioning heating ducts open windows people walking by fans etc e Area must be clean and free of excessive dust e Work surface must be stable and level e Balance must not be exposed to direct sunlight or radiating heat sources e Handle all electronic assemblies with appropriate Electro Static protection Explorer Series Service Manual 1 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 3 TOOLS AND TEST EQUIPMENT REQUIRED 1 4 SPECIFICATIONS e Common hand tools are suffic
41. el EX124 EX224 EX324 EX223 EX423 EX623 EX1103 Capacity g 120 220 320 220 420 620 1100 Readability d g 0 0001 0 0001 0 0001 0 001 0 001 0 001 0 001 Repeatability g 1d 0 0001 0 0001 0 0001 0 001 0 001 0 001 0 001 Linearity g 2d 0 0002 0 0002 0 0002 0 002 0 002 0 002 0 002 OCP NO 00 0 00045 0 00045 0 00045 0 0045 0 0045 0 0045 0 0045 see Table 4 4 for load Zero Drift g C 0 0001 0 0001 0 0001 0 001 0 001 0 001 0 001 Span Sensitivity g C 0 0001 0 0001 0 0001 0 001 0 001 0 001 0 001 Ohaus Corporation www ohaus com 2 Explorer Series Service Manual CHAPTER 1 GETTING STARTED EX without Draftshield non Approved Model EX2202 EX4202 EX6202 EX10202 EX6201 EX10201 Capacity g 2200 4200 6200 10 200 6200 10 200 Readability d g 0 01 0 01 0 01 0 01 0 1 0 1 Repeatability g 1d 0 01 0 01 0 01 0 01 0 1 0 1 Linearity g 0 02 0 02 0 02 0 02 0 1 0 1 OCL g see Table 4 4 for load 0 045 0 045 0 045 0 045 0 35 0 35 Zero Drift g C 0 01 0 01 0 01 0 01 0 1 0 1 Span Sensitivity g C 0 01 0 01 0 01 0 01 0 1 0 1 EX EC OIML Type Approved These models must meet all EC OIML requirements Model EX224M EX324M EX423M EX1103M EX4202M EX10202M EX10201M Capacity max g 220 320 420 1100 4200 10200 10200 Readability d g 0 0001 0 0001 0 001 0 001 0 01 0 01 0 1 Ver Interval e
42. enu Attention when LFT ON P could only print stable displayed weight CP Continuous Print Attention when LFT ON CP could not work SP Print on Stability SLP Auto Print stable non zero displayed weight Attention the corresponding settings in the communication menu are modified too SLZP Auto Print stable non zero weight and stable zero reading Attention the corresponding settings in the communication menu are modified too xP Interval Print x Print Interval 1 3600 sec OP ends interval Print Attention the corresponding settings in the communication menu are modified too OP See above H Enter or get Print Header Lines Header text length is up to 20 characters the setting format is H x header line text and H x could get the corresponding header line in the balance Z Same as pressing Zero Key T Same as pressing Tare Key xT Establish a preset Tare value in displayed unit X preset tare value Sending OT clears tare if allowed PT Prints Tare weight stored in memory PM Print current application mode weighing mode xM Set current application mode to x x depends on application use application list M Scroll to the next enabled mode PU Print Current weighing unit g Kg lb oz etc xU Set balance to unit x g Kg etc x depends on unit list U Scroll to the next enabled unit ON Brings out of Standby OFF Goes to Standby C Begin Span Calibration same as trigger from calibration menu Attention whe
43. er on the pan and touch Tare when stable Add material to the container The net weight of the material is displayed To clear the Tare value remove the container from the pan and touch Tare Tare send the xT command to the balance where x is the value in grams Enter a value of 0 to clear the Preset Tare The display will show the PT symbol and the tare value as a negative number Auto Tare Automatically tares the first item placed on the pan To use Auto Tare set it to ON in the Balance Setup menu The message line shows Place container When the container is placed on the pan it is automatically tared and the Net weight is displayed The Tare value is automatically cleared when the container is removed from the pan gt F Preset Tare ST A preset tare may be entered using a computer connected to the COM port To enter a Preset ss Calibration Test Calibration Test is used to compare a known calibration weight against the last stored span calibration data Internal Calibration W Touch Internal Calibration to initiate a calibration using the internal weight Stopwatch To use the built in stopwatch application touch Stopwatch A countdown timer with interval lap timer is available Calculator To use the built in calculator application touch Calculator The calculator has four functions addition subtraction multiplication and division Explorer Series Service Manual 11 Ohaus Corporation www ohaus com
44. gh resolution balances Class it may be necessary to zero or tare between each location Explorer Series Service Manual 51 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 PARTS LISTS amp DIAGRAMS This section of the manual contains parts lists and exploded views for the Explorer balances These are designed to identify the parts which can be serviced on the balance in the field The parts list and exploded views are separated into separate sections for the Terminal the Base and the Draftshield To order spare parts identify the required item in the exploded views and parts list then use the Spare Parts List to obtain the current part number for this item NOTE 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 office or www ohaus com Ohaus Corporation www ohaus com 52 Explorer Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS TERMINAL SPARE PARTS 5 1 d Si iat i K D re E Ohaus Corporation www ohaus com 53 Explorer Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 1 TERMINAL SPARE PARTS Item Description Part Number 2 Function Label EX 83033626 3 Top Hous
45. h as possible As a last resort a solvent such as Nail Polish Remover can be tried First test the plastic on the inside of the Housing to see if the solvent damages the plastic The solvent must not come in contact with the Touch Panel e Install the new Function Label Trial fit the new label to become familiar with its placement Remove the clear protective liner on the inside label window verify that the window area is clean Peal back about 1 3 of the liner material and cut it off do not tear as the torn edge may expose untreated areas that will stick to the adhesive Align the label where the liner is still attached when satisfied press the area where the adhesive is exposed except for near the cut liner Peal off the remaining liner and press the surface starting at the attached area and working outward to avoid bubbles under the label Ohaus Corporation www ohaus com 42 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 8 Replacing the Touch Panel If the touch panel needs to be replaced the whole Terminal top housing needs to be replaced The Function Label also needs to be removed when the terminal top housing is replaced The Function Label cannot be reused e Remove the Terminal Main PCBA and the LC Display see above e Remove the Function Label see above e Remove the Terminal top housing e Install a new Function Label see above e Calibrate the Touch Panel See Appendix A or the User Man
46. heckweighing Under Limit in grams x PCO Print Checkweighing Over Limit PCU Print Checkweighing Under Limit xCM Set Checkweigh mode 1 over under 2 target tolerance 3 Target weight tolerance xCT Set Checkweighing target in grams x for percent tolerance mode PCT Print Checkweighing Target for percent tolerance mode xCTW Set Checkweighing target in grams x for weight tolerance mode PCTW Print Checkweighing Target for weight tolerance mode xC Set Checkweighing tolerance x Attention when x is a positive value it is used to set the tolerance value vice versa PC Print Checkweighing tolerance xCW Set Checkweighing weight tolerance x Attention when x is a positive value it is used to set the tolerance value vice versa PCW Print Checkweighing weight tolerance xDH Set Display Hold mode Peak Hold x A Automatic S Semi Automatic M Manual xD Set 1 second print delay set x 0 for OFF or x 1 for ON XFL Set filter level to x 1 low 2 med 3 high XAL Set Auto zero to x x 1 for Od x 2 for 0 5d x 3 for 1d x 4 for 3d Esc R Resets all Balance menus to factory defaults Attention The binary code of this commands is 1B 20 52 OD 0A or 1B 52 OD 0A PID Print current user Name xID Program user Name Attention only allowed numeric input xTL Set Totalize Mode x A Automatic M Manual PTIME Print current time PDATE Print current date xTIME Set Time x format hh mm ss xDATE Set Da
47. ic Guide nun ee ee 16 4 1 Calibration Mass Values en 39 4 2 Repeatability Worksheet EE 42 4 3 Linearity Test Reference and Load Masses nennen 43 4 4 Off Center Load Mass Values een 44 5 1 Terminals pare Parts isis a eins Ram ra 48 5 2 Base Spare Parts Non Draftshield Model 50 5 3 Base Spare Parts Draftshield Model 52 5 4 Draftshield Spare Parts cccccccccccceeeeeseeneeaececeeeeeseceeaeceeeeeeeseeeecasaeeeeeeesessnsenaeees 54 B 1 Service Calibration Mass Values 00000 err 60 C 1 Interface Command Ciste essen ennnnnnnnnennnnnnnnnnnnneennnnnsnennennnnnn 74 Ohaus Corporation www ohaus com iii Explorer Service Manual CHAPTER 1 GETTING STARTED 1 GETTING STARTED 1 1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Explorer Series balances Familiarity with the balance 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 balance Chapter 2 Troubleshooting Contains a diagnostic guide and error code table Chapter 3 Maintenance Procedures Contains preventive maintenance procedures and disassembly repair and replacement procedures Chapter 4 Testing Contains a list of required test masses an operational test s
48. ient to disassemble the Explorer balances e APC running Microsoft Windows XP or later e Explorer Software Service Tool PN 83032124 e RS232 Cable Balance to PC PN 80500525 e Digital voltmeter DVM with an input impedance of at least 10 meg ohms at 1 volt DC e Masses as shown in Table 4 1 Specifications for the Ohaus Explorer Balances are listed in Table 1 1 When a balance has been serviced it must meet the specifications listed in the table Before servicing the balance determine what specifications are not met Special Note regarding Approved balances The specifications for the approved balances below are only for initial testing These balances must be tested according to the requirements of the local Weights and Measures authority Before returning the balance to service an approved representative of the local Weights and Measures authority must certify the balance Ambient conditions Indoor use only Altitude Up to 2000 m Specified Temperature range 10 C to 30 C Humidity maximum relative humidity 80 for temperatures up to 31 C decreasing linearly to 50 relative humidity at 40 C Mains supply voltage fluctuations up to 15 to 10 of the nominal voltage Over voltage category Il Pollution degree 2 Operability is assured at ambient temperatures between 5 C and 40 C TABLE 1 1 SPECIFICATIONS EX with Draftshield non Approved Mod
49. in Weight Class EX124 100g 50g 100g 25g 50g 759 100g ASTMClass1 OIML E2 EX224 200g 100g 200g 50g ae ASTM Class 1 OIML E2 EX324 M N 300g 150g 300g 759 004 2259 ASTMClass1 OIML E2 EX223 2009 100g 200g 50g 75g 100g 200g ASTMClass1 OIML E2 EX423 400g 200g 400g 1909 SCH 3009 AsTMClass1 OIML E2 EX623 600g 300g 600g 1509 200 4509 AsTMClass1 OIML E2 EX1103 M N 10009 500g 1000g 2709 000 7509 aSTMClass1 OIML E2 EX2202 20009 1000g 2000g 9009 Ee 7509 ASTM Class1 OIML E2 1000g 2000g EX4202 40009 2000g 4000g 30007 4000 ASTMClass 1 OIML E2 EX6202 6000g 3000g 6000g 1500g 30009 ASTMClass1 OIMLE2 4500g 6000g 2500g 5000g 7500g 10000g 1500g 3000g EX10202 M N 10 000g 5000g 10000g ASTM Class 1 OIML E2 EX6201 6000g 3000g 6000g 4500g 6000g ASTM Class2 OIML F1 EX10201 10 000g 5000g 10000g 2500g 5000g ASTM Class 1 OIMLE2 7500g 10000g EX12001 12 000g 3000g 12 000g 1500g 3000g ASTM Class2 OIML F1 7500g 12 000g EX24001 24 000g 10 000g 24 000g 5000g 10 000g ASTM Class 1 OIML F1 17 000g 24 000g EX35001 35 000g 10 000g 35 000g 5000g 10 000g ASTM Class 1 OIML F1 22 500g 35 000g Balance Info Contains information about the balance including Balance Type Max d Balance ID IDNR Loadcell Type Loadcell Serial Number Terminal Serial Number Terminal SW Version Base SW Version Exit Service
50. in procedure Cancel the procedure first Battery backup for the real time clock Replace the real time clock battery on the has lost its charge Base Main PCBA see 3 4 2 Note There is 40 second timeout control for print under stable requirement If the unstable condition continues over 40 seconds balance will send ES to the printer Explorer Series Service Manual 19 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 3 MAINTENANCE REPAIR PROCEDURES 3 1 PREVENTIVE MAINTENANCE Ohaus balances are precision instruments and should be carefully handled stored in a clean dry dust free area and cleaned periodically Follow these precautionary steps e When a balance 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 e Donotleave a mass on the balance when the balance is not in use e Allow time for the balance to stabilize after moving it from an area which is at a different temperature than the area where it is to be operated Allow one hour for each 5 F 2 7 C temperature change before using the balance After temperature stabilization allow an additional 60 minutes after turning the balance on for the balance electronics to stabilize Preventive Maintenance Checklist The balance should be inspected and checked regularly as follows 1 Remove the Pan and Sub Pan to inspect and clean the area
51. ing average piece weight is Shows error returns to re establish the Weight too small APW Operation Weight reading not stable See above Incorrect weight reading Timeout Busy tare zero printing Retry after completion RS232 USB or Ethernet interface not see above RS232 USB or Ethernet working interface not working Print settings enable the stable print but Move balance to suitable location allow there is unstable environment vibration balance to stabilize its temperature or air currents or changing temperature set Main Menu gt Communication gt RS232 USB Ethernet gt Print Settings gt Print Output gt Stable Weight Only to OFF Overload Weight on pan exceeds capacity Remove weight from pan Underload Pan is removed during weighing Re install pan Over initial zero range Under initial zero range Pan was removed prior to power on Install pan and re zero Pressing Print or command P do not work immediately Pan has load during power on Remove weight from pan and re zero Ohaus Corporation www ohaus com 18 Explorer Series Service Manual CHAPTER 2 DIAGNOSTIC GUIDE IDNR error Type data error Contact the authorized dealer operation not There is no sample on the pan when allowed EE dee sample on the pan and redo Tare Shortcut buttons are gray and no action when pressing them Does not retain the correct time and date The current application is
52. ing Assembly Terminal EX 30019590 5 Display LCD EX 83033622 6 PCB Main Terminal EX 83033620 7 PCB Interconnect Terminal EX 83033621 8 Bottom Housing Terminal EX 83033628 9 Bracket Assembly Terminal EX 83033625 14 Cable Kit Terminal EX 83033630 20 Hardware Kit Terminal EX 83033631 All Terminal Complete EX 83033632 Ohaus Corporation www ohaus com 54 Explorer Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 2 BASE SPARE PARTS Non Draftshield models Explorer Series Service Manual 55 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 2 BASE SPARE PARTS NON DRAFTSHIELD MODELS Item Description 1 Pan Rectangular 2 Pan Support Rectangular 4 3 Windshield Rectangular 4 EMC Plate 5 Top Housing Non DS 6 IR Sensor PCBA 7 Base Non DS 8 Level Bubble 9 Main PCBA 10 Connect PCBA 11 Load cell 17 Foot Kit 18 Cable Kit not all shown 20 Hardware Kit not all shown Not shown Box Non DS Not shown Packaging Complete Non DS Ohaus Corporation www ohaus com 56 Explorer Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 3 BASE SPARE PARTS Draftshield models Explorer Series Service Manual 57 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 3 BASE SPARE PARTS DRAFTSHIELD MODEL
53. ives the USB signal and reacts to the command The USB Interface includes a CD with the software drivers to create the required virtual port on the computer 3 1 System Requirements e PC running Windows 989 Windows 98SE Windows MET Windows 20007 Windows XP or Windows ZP e Available USB port Type A 4 pin female 3 2 USB Connection 3 2 1 The balance s USB port terminates with a 4 pin female USB Type B connector A USB Cable type B male to type A male is required not supplied 3 2 2 Ensure that the balance is powered on and working properly 3 2 3 Power on the computer and verify that its USB port is enabled and working properly 3 2 4 Plug the cable s USB connectors into the computer s USB port and the balance s USB port Windows should detect a USB device and the New Hardware Wizard will be initialized 3 3 Virtual Port Software Installation 3 3 1 Insert the supplied CD into the computer s CD drive Different versions of Windows have slightly different steps to load the driver that is on the CD In all versions the New Hardware Wizard guides you through the required steps to select the driver that is located on the CD Ohaus Corporation www ohaus com 74 Explorer Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS Add Hardware Wizard Welcome to the Add Hardware Wizard This wizard helps you Install software to support the hardware you add to your comp
54. l 15 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE 2 DIAGNOSTIC GUIDE This section of the manual contains troubleshooting information Information is contained to isolate specific problems using Table 2 1 Diagnostic Guide Follow all directions step by step Make certain that the work area is clean Handle balance components with care Use appropriate electro static protection devices to prevent damage to the sensitive electronic components 2 1 TROUBLESHOOTING General procedures for Troubleshooting 1 Do the most obvious user level remedies 2 Visual Check Check that the internal parts are clean and free from debris Examine the balance for damage or signs of abuse replace any damaged items Use the error code table for solutions for specific codes Use the Diagnostic Guide locate the symptom then follow the suggested remedies in order Note Allow equipment to warm up for 60 minutes on precision models for optimal weighing performance Allow 4 hours for analytical models to stabilize 2 2 SOFTWARE In most cases understanding the customer s problem with the balance is easy Physical damage displayed error code failure to power up and obvious poor performance can usually be repaired by following the instructions in the following sections Some balance issues may be software related New releases of the software may correct these issues The Explorer Balance has upgradeable software in the Terminal
55. meric Value Only is locked OFF e Auto print mode selections are limited to OFF On Stability and Interval Continuous is not available Note The security switch under the Base must be in the locked position to set Legal for Trade to ON The security switch must be in the unlocked position to set Legal for Trade to OFF Explorer switch Explorer High Capacity After the Menu Lock setting has been turned off the balance must be inspected in accordance with local weights and measures regulations before it can be used in LFT mode again Local authorities may secure the switch using paper seals wire seals or plastic ties Note M and N models When the Menu Lock switch is set to on certain menu items will be forced to the required setting and the required menus will be locked Ohaus Corporation www ohaus com 12 Explorer Series Service Manual CHAPTER 1 GETTING STARTED 1 7 MENU STRUCTURE Programmable features of the Explorer are accessed through a graphical interface using the Display Touch Panel By touching an item on the display a further set of options will appear 1 7 1 User Menu For more detail on using the menu see the Explorer Instruction Manual TABLE 1 5 EXPLORER USER MENU g Nr ts X gt Calibration User Balance Applications Weighing GLP and Communication Settings Setup Units GMP Data M io SB
56. n LFT ON the operation is not allowed IC Begin internal Calibration same as trigger from calibration menu UC User Calibration uses default weight same as trigger from calibration menu Attention when LFT ON the operation is not allowed AC Abort Calibration Attention when LFT ON the operation is not allowed xUC Set user defined weight and trigger one user calibration The user defined weight is only used for this command PSN Print Serial Number PV Print base software version terminal software version and LFT ON if LFT is set ON x Set Counting APW x in grams must have APW stored P Print Counting application APW Explorer Series Service Manual 71 Ohaus Corporation www ohaus com APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS TABLE C 1 INTERFACE COMMAND LIST CONTINUED Command Function x Set Percent application reference weight x in grams must have reference weight stored P Print Percent application reference weight xAW Set Dynamic Weigh Level to x x 1 99 seconds xAW Set Dynamic Weigh Mode x A Automatic S Semi Automatic M Manual PAW Print Dynamic Weigh Level BAW Start Dynamic Weigh cycle Manual Mode CW Clear locked weight weight lt threshold in Dynamic Weigh Display Hold amp Totalize xCO Set Checkweighing Over Limit in grams x xCU Set C
57. n both sides The cable connector will face up or down depending on the side it is mounted Loosen the 2 retaining screws approximately 2 turns Rotate the retaining washers so that it no longer engages the PCB slide out the PCBA Disconnect the cable at the Connect PCBA Explorer Series Service Manual 39 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 3 Remove the Connect PCBA e Disconnect the Connect Cable to the Main PCBA Remove the 2 retaining screws the PCB is now free e During disassembly and re assembly note how the switch engages the Switch Actuator lt hasse wes E j 4 Remove Main PCB Note For EX12001 EX24001 and EX35001 models please see section 5 Remove the left IR Sensor PCBA see above e _ Disconnect the cables along the top edge of the PCB Top edge connectors Loosen the 2 retaining screws approximately 2 turns Rotate the retaining washers so that it no longer engages the PCB slide out the PCB S Disconnect the Power Jack and the Ribbon Cable to the Connector PCBA cables Sec 7 Real Time Clock battery Ohaus Corporation www ohaus com 40 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES Re install Reverse the procedures to re install the PCBAs See Appendix C for instructions on how to use the software Service Tool to configure the new PCBA to the balance 5 Remove Main PCB EX12001 EX24
58. oo om LEI e e E D j oo ee 218 6985 359 7946 218 700 359 795 423 288 846 575 1 234 589 21000 00 31000 00 510000 00 31000 0 510000 0 60000 0 120000 0 175000 0 33951 2 64815 8 95680 6 157410 0 geen 157410 185208 370416 540190 m 2213 390 1345 40 2213 40 Zonen 5209 2 7596 75 en 2333 33 N em edel le lee ei 0001 000 001 001 ont oul on 100 100 100 tool 100 Explorer Series Service Manual 7 Ohaus Corporation www ohaus com p CHAPTER 1 GETTING STARTED 1 5 BALANCE OPERATION The Explorer is a very simple to use yet sophisticated balance Please refer to the Explorer Instruction Manual for complete information on the set up and use of the balance 1 5 1 Overview of the Controls Touch to access application setup menu Touch to change Touch to access applications available libraries Totalization v Library G Touch for information menu Place sample on the pan Press Accumulate to add to the total Instructional Messages Stability Net NET Touch unit indicator to Gross G and or center charge weidhihd urit of zero gt 0 lt indicators e o g gning Total 19353 92 g Capacity or Status Guides Capacity Guide Vary by application Result Fields a Information varies by application g 9 Application Buttons wmd Tare BEER Accumulate Clear Total Functions vary by application Touch icons to perform specific functions or I
59. rew to prevent it from falling out 4 Remove all cables connecting the load cell to the PCB and lift the load cell out from the housing Explorer Series Service Manual 35 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES Re Assembly Reverse the disassembly procedure to assemble the balance Ensure that there is no foreign material between the Base mounting surfaces and the Load cell Take special care to route the wires and cables according to their original positions Proper routing is important for RFI ESD performance Ensure that the wires or cables are not pinched during re assembly 3 5 REMOVING LOAD CELL PROTECTION SCREWS Attention This process is only needed for 1 2 and 3 decimal scales It is very important to remove the shipping protection screws after assembling the load cell into the scale housing otherwise the load cell will not work Please follow the steps below 1 Place the load cell in front of you as shown in the picture below 2 Start by removing the screw on your left side Please pay attention to not shift the spider from its position during this procedure Follow by removing the screw on the right side 3 Remove both screws with shims completely from the load cell Please store the screws and shims in a safe place Ohaus Corporation www ohaus com 36 Explorer Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 6 REPLACING THE PRINTED CIRCUIT
60. rmine if the balance is working properly 1 The reading on the display should be Og 2 Select a mass weighing near the maximum capacity of the balance and place it on the center of the Pan Observe and record the reading Remove the mass The reading should return to Og 1d Repeat this test three times The readings should be within 1d If so the balance passes the Precision Test If the deviation for any set of readings using the same mass placed on the center of the Pan is greater than 1d the balance does not meet the precision specification Inspect and correct the following areas Check for mechanical obstructions Any foreign object touching any part of the moving assemblies will cause a balance to fail the Precision Test Inspect and correct as necessary 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 If the balance does not pass this test the Load Cell may need to be replaced Ohaus Corporation www ohaus com 46 Explorer Series Service Manual CHAPTER 4 TESTING 4 4 2 Repeatability Test non approved models The repeatability specification is defined as the Standard Deviation value derived from a set of weight readings This test uses more weight data than the Precision Test and will allow for occasional
61. setup and operate the Balance Refer to the Instruction Manual for more information Standby Touch Standby to shut down the display Note After initial start up in Standby your balance needs no warm up time and is immediately available for weighing by touching the Start up icon Printing Data e Touch Print to send the displayed value to a printer or computer via the active COM port Note Ensure proper setup of connections printing and interface parameters Note Data may also be printed using the Touchless Sensors by configuring these for Printing Data may also be printed using the P command from a computer connected to the COM port Applications Ta The balance can be configured to operate in various Application modes Touch Applications to choose or the top button in the Application area TouchLess Sensor Status Explorer balances have four TouchLess sensors that can be assigned a unique function when activated e g zero print tare etc To assign a task for each TouchLess sensor press TouchLess Sensor Note To activate a sensor move an object over it from a distance of 1 2 inches or 3 cm The sensor shows a green light and beeps when activated If the sensor cannot be activated sensor is disabled during certain instances like when the Menu is displayed the sensor shows a red light Ohaus Corporation www ohaus com 10 Explorer Series Service Manual CHAPTER 1 GETTING STARTED AutoCal
62. t item to navigate to the Menu items or touch a button to change location Main Menu Ah AE HO Calibration User Settings Balance Setup Application Modes Weighing Units GLP and GMP Data Ee E BE Explorer Series Service Manual 9 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 5 4 Changing Settings These Icons are available to setup and operate the Balance Refer to the Instruction Manual for more information To change a menu setting navigate to that setting using the following steps Enter the Menu TE kopication Modes From any Application screen Touch Menu op The Main Menu List appears on the display SET Weighing Select the Sub Menu Parts Counting Scroll down to the selected item of the Main Menu List and touch it The Sub Menu appears Percent Weighing Check Weighing sme Select the Menu Item Continue until the desired setting is chosenin the Menu list Touch the setting to change it The changed setting will be displayed as a CH EZ highlighted for 2 seconds to confirm the i changed value Dynamic Weighing Filling d Exit the Menu and Return to the Current Application After the setting is confirmed touch Home to return to the Application Note at any time the Main Back amp Done buttons can be touched to navigate to the desired area of the menu or return to the current Application 1 5 5 Functions and Icons These Icons are available to
63. te x format mm dd yyyy CA Continuous weight same as CP SA Stable load same as SLP xA Interval Print x interval in sec 1 3600 0 off same as xP 0A Set AutoPrint off same as OP SC Begin Span Cal same as C xAM Set Animal Mode to Auto Semi Auto Manual Same as xAW A S M Prints current mode same as PM xS 0 print unstable data same as IP 1 print stable only same as SP xRL 0 disable response 1 enable response Attention this command only controls the OK response Ohaus Corporation www ohaus com 72 Explorer Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS General Notes e Commands sent to the indicator must be terminated by a carriage return CR or a carriage return line feed CRLF e Alternate command characters may be defined by the user e Data output is always terminated with a carriage return line feed CRLF e There is 40 second timeout control for print under stable requirement If the unstable condition continues over 40 seconds balance will respond ES Note 2 Application list Index Application Index Application CH Weighing 11 Pipette Adjustment Parts Counting 12 Ingredient Adjustment Percent Weighing 13 SQC Check Weighing Dynamic Weighing Filling Totalization Formulation Differential Peak Hold Density Determination O CO dl OO A WD N gt CH Note 3
64. ual for the procedure to calibrate the Touch Panel 3 9 Replacing the Feet The feet assemblies incorporate a bearing assembly that allows for easy adjustment of the feet There is a load bearing plate that transmits the load to the Base The plate is not symmetrical so its placement is different in the front and rear locations see sketch below One edge of the plate has a slight curve This curve should face inward and be towards the front of the balance in all locations The bearing assembly is made of three parts two disks with a bearing ring in the center The curved surface of the dicks should face the ball bearings Assemble the foot components in the order shown in the sketch below Rear Foot l Load bearing plate Bearing Assembly Front Foot ST Explorer Series Service Manual 43 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE REPAIR PROCEDURES 3 10 Replacing the Motor and Motor PCBA The feet assemblies incorporate a bearing assembly that allows for easy adjustment of the feet Ohaus Corporation www ohaus com 44 Explorer Series Service Manual CHAPTER A TESTING 4 TESTING Before and after servicing an Explorer balance an operational test and various performance tests should be made to confirm if the balance meets specifications Turn the balance on and allow it to warm up for at least one hour before performing these
65. uter Troubleshoot problems you may be having with your hardware amp If your hardware came with an installation CD itis recommended that you click Cancel to close this wizard and use the manufacturer s CD to install this hardware To continue click Next Example of Windows XP Hardware Wizard 3 3 2 After clicking Finish the virtual port should be ready for use Windows typically adds the virtual port in sequence after the highest number COM port For example on PC s equipped with up to 4 COM ports the virtual port will be COM5 3 3 3 When using the USB interface with programs that limit the number of COM port designations e g Ohaus MassTracker allows only COM1 2 3 amp 4 it may be necessary to assign one of these port numbers to the new virtual port This can be done in the Port Settings of the Device Manager utility found in the Windows Control Panel 3 4 Balance Setup for USB interface 3 4 1 The Ohaus Interface is preset to communicate using the following settings 2400 baud 7 bit no parity no handshake To use different settings it will be necessary to change either the balance settings or the computer settings 3 4 2 Configure the balance to the desired USB and printing parameters PRINT USB Stable USB On Off On Off A Print Baud Cont On Stbl On Acc 5sec 15sec 600 1200 2400 4800 9600 19200 30sec 60sec off Parity End 7 even 7 odd 7 none 8 none Yes No Handshake None
66. weighings are used one near 50 of max and the other near 100 of maximum capacity 1 See Table 1 1 to determine the two weight values that must be used 2 Record 10 reading using each weight value Zero the balance between each reading if necessary 3 The difference between the results of the 10 readings must be less than the absolute value of the Maximum Permissible Error MPE for the load The MPE for each load in grams is given in Table 1 1 4 4 3 Linearity Test This test is used to determine the linearity of the unit throughout its operating range The masses used to perform this test can be utility masses This is a reference test for approved balances as there is no linearity specification The approved models should be able to pass this test so it is still valid to determine balance performance NOTE The balance must pass the Precision and Repeatability Tests and be calibrated before the Linearity Test is performed TABLE 4 3 LINEARITY TEST REFERENCE AND LOAD MASSES Model Reference Mass Load 1 Load 2 Load 3 EX124 30g 30g 60g 90g EX224 50g 50g 100g 150g EX324 75g 75g 150g 225g EX223 50g 50g 100g 150g EX423 100g 100g 200g 300g EX623 150g 150g 300g 450g EX1103 250g 250g 500g 750g EX2202 500g 500g 1000g 1500g EX4202 1000g 1000g 2000g 3000g EX6202 1500g 1500g 3000g 4500g EX10202 2500g 2500g 5000g 7500g EX6201 1500g 1500g 3000g 4500g EX10201 25
67. weight deviations due to testing variations Note The required method for approved models OIML and NTEP is shown in the following section Requirements e To perform this test a single mass must be used for all readings e The test mass should be approximately of the capacity of the instrument e Wear gloves when handling the mass Set Up Before starting a repeatability test set up the instrument as follows Enter the service menu see Appendix B 1 and adjust and record the following settings e Set the Stability setting to 0 5d its lowest setting e Set the Filter level to Middle e Set the AZT Auto Zero Tracking to bd its lowest setting Do not turn it off Enter the User Menu see 1 8 1 and adjust the following settings e Set the instrument to display the same units as the performance specifications Usually kg g or mg Record Test Parameters e Stability Setting e Filter Level Setting e Auto Zero Tracking Setting e Displayed Units e Mass Used Test Procedure 1 Zero the instrument 2 Using atest mass approximately half the capacity of the instrument place the mass on the center of platform Record the reading on the worksheet provided 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 with the ten 10 readings Explorer Series Service Manual 47 Ohaus Corporation www ohaus com CHAPTER 4 TESTING

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