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1. 1 A 2 4 AS 3 ad 108 Figure 3 14 Contact Board Removal Figure 3 15 Force Coil Lever Removal CHAPTER 3 REPAIR PROCEDURES 3 1 16 Removing the Force Coil Lever Assembly from Monoblock in Precision Top Loader 1 Remove four screws which secure the overload protection to the Monoblock See Figure 5 5 2 Unscrew fastener screws at formed chassis and remove Monoblock with lever from formed chas sis Some Monoblocks have 4 screws Note Hold Monoblock only at the front next to formed chassis or at the rear 3 Unscrew and remove three fastener screws 4 of the Position Sensorassembly See Figure 3 15 4 Hold Contact Board 1 to ensure the fine coil wires cannot tear off then remove Screw 2 Figure 3 14 5 Remove Contact Board from holder and screw onto Lever 3 Figure 3 14 6 Remove one screw T8 attaching Temperature Board to underside of Monoblock magnet as sembly and remove Temperature Board from the magnet assembly 7 Insert the centering pins 1Aand 1B from the service tool set in the holes provided See Figure 3 15 NOTE A screw may be installed in the hole 1A this is additional overload protection Turn it 1 4 turn and remove it 8 Remove screw 4 from Load Cell Board and remove Load Cell Board Temperature Board Assembly and Position Sensor Assembly 9 Carefully undo Nuts 2 in the direction shown by the arrow while holding th
2. 3 17 3 25 Position Sensor Connections oisi aa 3 18 3 26 Display Removal Installation for Explorer Precision Top Loader Balance 3 25 3 27 Display Removal Installation for Explorer High Capacity Top Loader o P 3 26 3 28 Rear View of Display PCB 3 27 3 29 Membrane Switch Cable Routing Rr REIR Run panne 3 28 3 20 Display Removalidnstallaliofi e ciii qa Rt 3 29 3 31 Rear View of Display PCB Assembly 2 3 30 3 32 Assembly Bulb 3 32 4 1 Segment Bi ET 4 1 4 2 BIET c Re T 4 1 4 3 P P 4 1 4 4 Analytical Off Center Load Adjustments Diagram 4 3 4 5 Monoblock Off Center Load dM EN 4 4 4 6 Monoblock Adjustments 4 6 TABLE OF CONTENTS Cont LIST OF ILLUSTRATIONS FIGURE NO TITLE PAGE NO 5 1 Overall Exploded View of Precision Top Loader Balance 5 2 5 2 Overall Exploded View of Analytical Balance 5 4 5 3 Exploded View of Precision Top Loader Base Assembly 5 6 5 4 Exploded View of Analytical Load Cell 5 8 5 5 Exploded View of Monoblock Load Cell fo
3. B 3 B 7 Personality Data label Entry B 6 B 8 Downloading Personality Data and or TC Data into the Balance B 8 B 9 Saving Personality Data Data 8 B 10 Opening Data Files e B 8 B 1iGlear EP Loader saroe CS B 8 B 12Coniirm TO B 8 TABLE OF CONTENTS Cont APPENDIX C PRODUCTION MODE CALIBRATION sume C 1 C 2 Manufacturing Calibration MFg Procedure C 1 Manufacturing Weight Calibration MFgWt Procedure 2 APPENDIX D REPLACING BOTTOM DISPLAY BOARD D 1 Replacing the Bottom Display Board on Voyager Explorer Pro and Voyager Pro Balant Rm D 1 D 2 Explorer Pro Voyager and Voyager Pro flash Instructions D 1 LIST OF TABLES TABLE NO TITLE PAGE NO 1 1 Calibration 1 3 1 2 Analytical Specifications 1 4 1 3 Precision Top Loader Specifications 1 4 1 4 High Capacity Top Loader Specifications 1 4 2 1 Diagnostic GUINE C PH 2 2 2 2 Explorer Voyager Error Codes 4444422 220 2 3 2 3 Information Messages M 2 4 2 4 Explorer Pro Error codes ves 2 5 4 1 Types of Perfor
4. 3 31 CHAPTER 4 TESTING CEU oo ncc 4 1 4 1 1 Operational Test Rn 4 1 4 1 1 1 Segment Display 4 1 4 2 Performance Tests All 01 4 2 4 2 1 Precision Repeatability 4 2 4 2 2 Off Center Load TOT 4 2 4 2 3 Linearity TeSt o 4 8 424 5232 Communication tormenti 4 9 TABLE OF CONTENTS Cont CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 Drawings Parts LiStS E Im 5 1 5 3 521 Precision Top Loader Base Parts 5 3 52 2 Analytical Base Parts ia 5 5 5 2 3 Precision Top Loader Base Parts LIS 5 7 5 2 4 Analytical Load Gell Parts 5 9 5 2 5 Precision Top Loader Monoblock Load Cell Parts List 5 11 5 2 6 High Capacity Top Loader Balance Parts List 5 13 5 2 7 High Capacity Top Loader Balance Parts List 5 15 5 2 8 Monoblock High Capacity Top Loader Balance Parts List 5 17 5 2 9 Explorer Display Parts St 5 19 5 2 10 Explorer High Capacity Parts 5 21 5 2 11 Explorer Pro Voyager Display Parts List 5 23 5 2 12 Voyager Explorer Pr
5. TC Data COM1 2400 n 7 2 LABEL2 TXT 4 APPENDIX A EXPLORER EP LOADER 8 Temperature Compensation TC Data Entry Cont 2 Cont a When the first entry of the AutoCal TC data H is entered the main screen will change See below The added grid is for loading the AutoCal Data in Explorer Pro balances It is not used for Explorer balances Loader Of x Fille Help Personality Data paci rsor 152 2990 nvoc 42cr 17 7 crer ser aB2r Exi por 7403 692 146 6957 oras acer Fee 2957 1750 aosa 46D BIE7 po32 152 2957 oras oea BIET TC Data C D E 1 565310e 20 3 657989 11 8784341 01 1 395911 13 3 568205 04 F G H J 2 072502 05 6 462143e 06 11 663802e 20 3 571619 11 19 786206e 01 DCODE 65535 AutoCal Data 03 4 92F C52 2990 070 42 fi 2 E3AD B70F OF 3B 7403 4FB4 01 BO Data Type Download v Personality Data v TC Data COM1 2400 n 7 2 LABELS TXT Clear Comm Setup SN 3 Confirm that the TC Data from the label was correctly inputted into the TC Data of the EP Loader 7 APPENDIX A EXPLORER EP LOADER 9 Personality Data and or TC Data into the Balance 5 In the Data Type box of the EP Loader ther
6. Adjusting the Cornerload on Precision Top Loader Balances The Monobloc measuring cell is not adjusted by means of the cornerload screws but by removing material from its top This is achieved by a few strokes with a nibler file exerting slight pressure as you pull the file towards you CAUTION Do not attempt to adjust if more than 5 counts out File only in positions shown in Figure 4 6 On completion of the adjustments clean filing sites by removing residue with adhesive tape See Figure 5 3 for following steps 1 With power removed install Pan Support 2 and weighing Pan then apply power Position of the test weight Filling position 2 Perform off center load test and determine error with display 3 Remove Pan and Pan Support 4 Determine associated filing position per Figure 4 10 Perform adjustment as required 5 Repeat above steps until balance is within VY Y Y tolerance as per table 4 1 mem 6 Turn the balance OFF and remove power E 7 Remove the Pan and Pan Support 2 8 Remove cable extenders connect the two cable connectors from the Load Cell 9 to the Main PC Board edge connectors J2 J6 the Sensor Cable The Sensor Board Cable is lo cated at the rear of the balance and may interfere with the operation of the balance if it is Wate From Froni of Balanos 400 not positioned away from the Load Cell Dress Figure 4 6 Monoblock Adjustm
7. 3 4 3 5 installing NE 3 5 3 6 Hanger 3 5 3 7 Lever Removal llnstallation isi so tuna FRU 3 6 3 8 Vertical Guide Pillow Block Bearing Installation 3 6 3 9 installing Lever and 3 7 3 10 Removing Position Sensor Assembly from Monoblock 3 9 3 11 Position Sensor Assembly Mounting 3 10 3 12 Changing Load Cell Board 3 10 3 13 3 11 3 14 Contact Board Removal 3 11 9 15 c ciis oc ETE SEES 3 11 3 16 Forme Coil Lever Installalbiiis eee cease 3 12 sz Monoblock MO MING 3 12 3 18 Position Sensor Connections cie ecco tatit EH ERR ERE Re REESE REF HII MER 3 13 3 19 Calibration Motor Removal usui ied 3 14 3 20 Position Sensor Assembly Mounting 3 15 3 21 Once Col 3 15 3 22 Forme Coil Lever Installation 3 16 3 23 Installation Monoblock and Position 3 16 3 24 Servomotor Instellallottseca tice
8. OHAUS SERVICE MANUAL EXPLORER BALANCES EXPLORER PRO BALANCES VOYAGER BALANCES Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 973 377 9000 OHAUS SERVICE MANUAL EXPLORER BALANCES EXPLORER PRO BALANCES VOYAGER BALANCES Explorer UM o 95 rd PRECISION HIGH CAPACITY ANALYTICAL Explorer Pro PRECISION HIGH CAPACITY order SS PRECISION HIGH CAPACITY ANALYTICAL 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 Copyright 2003 Ohaus Corporation all rights reserved Registered trademark of Ohaus Corporation CHAPTER 1 INTRODUCTION Page No MES Cl Mr 1 1 1 2 Service Facilities 1 2 1 3 Tools and Test Equipment Required entes 1 3 1 3 1 MIS ew 1 3 1 3 2 Standard Tools and Test Equipment 1 3 1 4 Test Masses Required eri talea s 1 3 t5 SSS CNC AMONG 1 4 CHAPTER 2 DIAGNOSIS 2 1 THOUS SG BUN NR PR 2 1 22 Diagnostic UNOS Mm 2 1 2 21 ae meee 2 1 2 3 Explorer Voya
9. Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 USA Tel 973 377 9000 Fax 973 593 0359 In the United States call toll free 800 526 0659 between 8 00 a m and 5 30 p m EST 5 1 CHAPTER 5 DRAWINGS AND PARTS LISTS Boxed items are not available for sale Figure 5 1 Overall Exploded View of Precision Top Loader Balance 5 2 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 PARTS LISTS This section ofthe manual contains the replaceable parts for all models of the the Explorer Voyager Explorer Pro balances 5 2 1 Precision Top Loader Base Parts List KEY NO 1 1 10 11 11 11 NOTES TABLE 5 1 PRECISION TOP LOADER BASE PARTS LIST See Figure 5 1 1 PART NO DESCRIPTION 11108206 Pan 6 8 x 6 8 Explorer Voyager Explorer Pro 11108200 Pan Assy 8 x 8 Explorer Voyager Explorer Pro 11136325 Wind Shield Explorer Voyager Explorer Pro 11108115 Spacer Explorer Voyager Explorer Pro 11136113 Cover Top Loader Explorer Voyager Explorer Pro 490202 010 Power Adapter 100V 120V Explorer Voyager Explorer Pro 490203 010 Power Adapter 220V 240V Explorer Voyager Explorer Pro Note Requires Line Cord 76448 00 Line Cord UK Style Plug Explorer Voyager Explorer Pro 76199 01 Line Cord Australian Style Plug Explorer Voyager Explorer Pro 76198 00 Power Cord 220V E European In all cases where a part is replaced the balance shall be thoroughly ch
10. APPENDIX B EXPLORER PRO EP LOADER B 3 Run EP Loader Software 1 Click on EP Loader icon located in Start Programs EP Loader 2 The following screen will be displayed ra EP Loader BI XI Fille Help Personality D ata 0 0 DL DL D LI _ 0 0 _ C C DL DL DL 0 TC Data C D E __ D D E G H J T D Pf D o DCODE Data Type Download Clear Comm Setup TC Data 1 2400 7 2 2 APPENDIX B EXPLORER PRO EP LOADER B 4 Setup the Balance in Manufacturing Mode 1 Remove power from the balance 2 Remove the pan a It may be necessary to remove two screws holding the display assembly in place under the balance 3 Unclip the display module and ease it forward until the module is clear of the edge of the draft shield or the edge of the top balance cover 0 01g and O 1g resolution balances d Remove the Explorer Pro display module and install an Explorer display b Ensure that the display PCB cannot short to the balance casing Remove the 2 screws securing the draft shield or top balance cover in place Remove the plastic pan support clips if fitted Remove the draft shield or top balance cover dT D Install the manufacturing link in the position shown in Figure B 1 Fit manufacturing link through this access hole
11. Board edge connectors J3 J6 and the Sensor Cable The Sensor Board Cable is located at the rear of the balance and may interfere with the operation of the balance if it is not positioned away from the Load Cell Dress the cables and make sure that the cables do not interfere with the Load Cell If calibration option is installed connect cable to J4 Reinstall the PC Board and secure with two screws 3 Install the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors on the PC Board 11 Install the Shield 4 back on the balance and secure with two Screws 3 Figure 5 3 Install the Draft Shield and secure with two Screws 2 making sure Lockswitch Cover Seal 3 Figure 5 2 is in place Replace the Cover Plate 6 and Pan 5 inside of the Draft Shield Figure 5 2 NOTE If the Off Center Load Adjustment cannot be completed refer to the Precision Test Adjustment Test for Monoblock Balances Checking the Off Center Load 1 Level the balance 2 Place test weight in the middle of the weighing pan and tare 3 Move test weight half way to the weighing pan edge and note down the print out display values which differ from zero with sign see examples 4 Compare display values with off center load tolerance as listed in Table 4 1 Figure 4 5 Monoblock Off Center Load CHAPTER 4 TESTING 4 2 2 Off Center Load Test Cont Adjustment for Monoblock used in Precision To
12. Follow the suggested remedies in the order that 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 observed it is necessary to approach one area at a time and also remember that the symptoms may be interre lated In the event that erratic or fluctuating weight readings are observed it is necessary to isolate the problem to either the mechanical area or the electronic area of the balance If a problem arises that is not covered in this manual contact Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 USA Tel 973 377 9000 Fax 973 593 0359 In the United States call toll free 800 526 0659 between 8 00 a m and 5 30 p m EST 2 1 CHAPTER 2 DIAGNOSIS TABLE 2 1 DIAGNOSTIC GUIDE SYMPTOM PROBABLE CAUSE S REMEDY Unit will not turn on Balance drifts When balance is turned ON CAL shows on the display Error3 0 capacity 12000g 320000 balance High capacity 12000g 32000g bal ance will not turn on Power cord not plugged or properly connected to balance or defective Display module not connected prop erly Defective display PC Board Defective membrane switch IC U11 defective Display module cable defective Internal cables may be touching a moving part of the transducer Weigh below cover may have col lected
13. Replace Display PC Board CHAPTER 2 DIAGNOSIS TABLE 2 1 DIAGNOSTIC GUIDE Cont SYMPTOM PROBABLE CAUSE S REMEDY Unstable readings Excessive air currents Check environmental conditions Vibration on table surface Place balance on a stable surface or change averaging level Defective damaged Transducer Troubleshoot amp replace Transducer Defective main PC Board Replace main PC Board Error message display See Error Codes list 2 3 EXPLORER VOYAGER ERROR CODE TABLE The Explorer and Voyager balances are equipped with software which will display an error condition when it occurs Table 2 2 Explorer Voyager Error Codes describes the various error codes which can appear on the display and specifies the probable reason and remedy Table 2 3 lists the error messages that can appear on the display Table 2 4 lists the error codes for the Explorer Pro balance TABLE 2 2 EXPLORER VOYAGER ERROR CODES Displays Error 1 0 Usually caused by static discharge If the error persists replace the PCB Displays Error 1 1 Temperature channel duty cycle out of range Failed temperature sensor or broken wire between the temperature sensor and the PCB Displays Error 2 0 Unable to stabilize within time limit after pressing the tare button Look for something touching any moving part of the transducer Could be a problem with the transducer itself Displays Err 3 0 The zero has changed enough to make the internal calibration d
14. and Windshield 12 3 22 CHAPTER 3 REPAIR PROCEDURES 3 2 4 High Capacity Top Loader Balances Main Printed Circuit Board PCB and Power Supply PCB Referto Figure 5 6 in Chapter 5 for location of components called outin this procedure There are two printed circuit boards one is the Main PCB and the other is a Power Supply PCB To remove the boards proceed as follows 1 With the balance turned OFF and unplugged remove the Pan 1 2 Remove four Pan Mounts 2 3 Remove three Cover Housing Screws 3 and one screw 37 which secures the Housing Cover 4 to Base 19 4 Disconnect the Coil Cable Connector 8 the Internal Calibration Cable 38 if supplied and the Cell Cable Connector 9 from the Main PCB 6 5 Remove the two Protective Plate Screws 5 holding the Main PCB 6 and Power Supply PCB 7 6 Carefully lift both PC boards upwards and disconnect Connector PCB Cable 10 from the Power Supply PCB 7 7 To separate the PC boards diconnect the short Main PCB Cable 11 from the Main PCB 6 8 If the Main PCB is being replaced the following components must be removed from the defective PCB and installed on the replacement PCB EPROM 6 EPROM If the Power Supply is being replaced replace the following components 8 EPROM EEPROM 2 IC NOTE When replacing the PC boards you will notice two grooves in the Base 19 The PC boards must be properly seated
15. 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 11 CHAPTER 5 DRAWINGS AND PARTS LISTS NOTE Boxed items are not available for sale Figure 5 6 Exploded View of High Capacity Top Loader Balance Sheet 1 of 2 5 12 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 6 High Capacity Top Loader Balance Parts List TABLE 5 6 HIGH CAPACITY TOP LOADER BALANCE PARTS LIST See Figure 5 6 Sheet 1 KEY NO 1 3 13 14 16 19 27 28 29 30 39 NOTES PART NO DESCRIPTION 21201901 Platform High Capacity 12301097 Weigh Below Hook Voyager Explorer High Capacity 21202303 Cover Connector Board High Capacity 21202411 Connector PCB High Capacity 21202415 Display Cable Explorer Voyager High Capacity 00239026 Base Approved High Capacity 00239041 Level Support High Capacity 00215053 Level High Capacity 00230163 Security Screw High Capacity 11107002 Foot Set of 4 High Capacity 21202463 Display Lower Housing Explorer Voyager High Capacity 1 In all cases where part is replaced the balance shall be thoroughly checked after the replacement is ma
16. 20 3 657989 11 8 784341 01 1 395911 13 3 568205 04 2 072502 05 6 462143 06 1663802620 1 Confirm that the TC Data from the label was correctly inputted into the TC Data of the EP Loader APPENDIX B EXPLORER PRO EP LOADER B 7 Personality Data Label Entry 1 Locate the Personality Data label and the AutoCal Data label on the balance They will be located on the base under the display module There will be one for standard units and two for units with internal calibration In the same order as listed on the label input the Personality Data Label information into the Personality Data grid of the EP Loader If required also load the AutoCal data into the AutoCal grid of the loader After entering the data in Figures B 3 and B 4 the loader will look like the picture on the next page 610 x 1 mg 00000768C1A2 04 08 2003 83C1 4 F92F 1C52 2990 070C 42CF 17E7 8E5F AB2F E3AD B7OF OF3B 74D3 4FB4 01BO 9 06 B92F 1C46 6957 OF38 475A 4C5F CB83 8C1A F8DB 1DA6 2957 1F50 408A 486D 7 DD32 F92F 1C52 2957 OF38 408A 4 81E1 Figure B 3 Personality Data 04 08 2003 10 00000768C142 F92F 1C52 2990 070 42CF 17E7 CF8F 8E5F AB2F E3AD B7OF OF3B 7403 4FB4 O1BO Figure B 4 AutoCal Data B 7 APPENDIX B EXPLORER PRO EP LOADER B 7 Personality Data Label Entry Cont Loader Personality Data pact 03 4 92 fics2 2990 o
17. 23 previously removed at the bottom of the Base 18 Make sure the Monoblock Load Cell is properly aligned before tightening the Screws 3 Installthe Internal Calibration Machanismto the Base and secure using 4 screws previously removed if required 4 Connectthe two cable connectors from the Monoblock Load Cell 9 to the Main PC Board edge connectors J2 and J6 Dress the cables and make sure that the cables do not interfere with the Load Cell operation If internal calibration option is installed connect cable to J4 5 Secure the PC Board 11 to the Base 18 with the two Screws 3 6 Install the Hex Screws 14 and Washers 25 atthe rear of the balance into the connectors 7 Install the Shield 4 back on the balance and secure with two Screws 3 Figure 5 3 8 Install the Subplatform 2 and secure with two Screws 1 Figure 5 3 if required 9 Replace the Cover 6 and and secure with two Screws 3 making sure that the Lockswitch Cover Seal 4 is in place Figure 5 1 10 Replace the four Corner Spacers 5 with the open ends facing out Figure 5 1 if required 11 Replace the Pan 1 and Windshield 2 Figure 5 1 or Draft Shield 12 After assembly verify that the balance meets all specifications Perform all tests CHAPTER 3 REPAIR PROCEDURES 3 1 13 Position Sensor Assembly Removal from Monoblock in Precision Top Loader Balance 1 Removefour screws which secure the overload protection to the Monoblock and remove the
18. 5017 09 or 5017 02 cable Make sure the end of the cable marked balance is connected to the balance 2 Make surethe communication parameters Baud Data Bits parity stop bits are matched refertothe instruction manual 3 Press the PRINT button on the balance 4 The terminal program should display whatever was on the display of the balance 5 Send an Upper case V from the terminal program to the balance 6 The balance should respond with the software version it has installed 7 f both tests were sucessful the balance will communicate CHAPTER 4 TESTING 4 10 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 DRAWINGS AND PARTS LISTS This section of the manual contains exploded views for the Explorer Balances with associated parts lists The exploded view drawings are designed to identify the parts which can be serviced on the balance in the field To facilitate this the following coding system is used When a key number is enclosed by an circle it indicates that this part is stocked by Ohaus and can be ordered When a key number is enclosed by a four sided box it indicates that this part is NOT stocked by Ohaus and cannot be ordered The parts are shown for clarity only NOTE Inallcases where apartis replaced the balance must be thoroughly checked after the replacement made The balance MUST meet the parameters of all applicable specifications in this manual If further technical information is needed please contact
19. Displays Err 9 4 Factory internal calibration data failed checksum Perform MFG and MFGWT If the problem persists reload the TC data If the problem still persists the main PCB must be reconfigured at Ohaus Displays Err 9 5 Factory calibration data failed checksum Perform MFG and MFGWT Ifthe problem persists reload the TC data If the problem still persists the main PCB must be reconfigured at Ohaus Displays Err 9 8 User calibration data failed checksum Perform MFG Calibration For units with internal calibration also perform MFGWT Displays Err 9 9 Can not be fixed in the field the unit has to be temperature compensated TABLE 2 3 INFORMATION MESSAGES CALNOW IfInCAL internal calibration is installed Message to recalibrate the balance The message will remain until calibrated WARMUP Theusertried to perform an internal calibration and this message will be flashed in the 14 segment field The balance requires a 7 minute warm up period During warm up the user cannot select InNCAL from the menu SAVED This message is flashed when an item is changed in the menu and the new value is written to the EEPROM LOCKED This message is flashed when an item cannot be changed in the menu because the menu is locked and the Lock Switch is set locked LOW REF message is flashed parts counting or percent when the calculated reference weight is very low 2 4 CHAPTER 2 DIAGNOSIS 2 4 EXPLORER PRO ERROR CODE TABLE TABL
20. High Capacity Top Loader Balance 3 16 3 1 26 Changing Servomotor on High Capacity Top Loader Balance 3 17 3 1 27 Vertical Stop Adjustment for Monoblock in High Capacity Top o 3 18 3 2 Replacement of Major 3 19 3 2 1 Analytical Balances Main Printed Circuit Board PCB 3 19 3 2 2 Analytical Balance Position Sensor PC Board 3 21 3 2 3 Precision Top Loader Balances Main Printed Circuit board PCB 3 21 3 2 4 High Capacity Top Loader Balance Main Printed Circuit Board PCB and Power Supply PCB 3 23 3 2 5 High Capacity Top Loader Balance Connector Printed Circuit Board M P n 3 24 3 2 6 Removing the Display Module on Explorer Precision Top Loader iplc 3 24 3 2 7 Removing the Display Module on Explorer High Capacity Top Loader Balances ta 3 25 3 2 8 Display Printed Circuit BOB ere montre mmn 3 26 3 2 9 Membrane Switch 3 27 3 2 10 Replacing the DISplay uo eterne tnter 3 28 3 2 11 Removing the Display Module Voyager and Explorer Pro Models 3 29 3 2 12 Display PCB LCD Assembly Replacement 3 30 3 2 13 Bulb Replacement e
21. O O NS Figure 1 RF Shield a Install the link by pushing down on the top and then rotating it 90 to lock it in position b If a manufacturing link is not available remove the RF shield and locate the hole through the printed circuit board that was under the manufacturing link access hole Short the two pads just to the front of this hole 8 Apply power to the balance 9 The balance will come on by itself and display MFG before the normal turn on cycle B 3 APPENDIX B EXPLORER PRO EP LOADER B 5 Connect the Balance to a PC 1 Connect the RS232 interface cable between the balance and the PC d Note that for a 9 pin to 9 pin cable ensure the connector marked BAL is connected to the balance 2 Check communication between the balance and the PC a In the EP Loader single click on the Comm Setup button The following pop up screen will be displayed i Communications Setup Port Speed COM 1 300 COM 2 1200 e 2400 C COM 3 4800 C 9600 Cancel Comm Test b Modify the communication parameters of the EP Loader to match the balance then single click the Comm Test button A pop up screen will be displayed to indicate that the communication has failed or passed B 6 Temperature Compensation TC Data Entry 1 Locate the TC Data Label on the balance It will be under the display module Refer to Figure B 2
22. Pan 5 inside of the Draft Shield Figure 5 2 Connect the AC Adapter to an outlet and the Balance Turn the balance ON Allow the balance to warm up for at least one hour If the balance appears to be functional refer to paragraph 4 1 and retest the balance If the balance does not appear to function properly and the Main PC Board is being replaced in an effort to isolate the problem the problem may still be in the Load Cell 3 20 CHAPTER 3 REPAIR PROCEDURES 3 2 2 Analytical Balance Position Sensor PC Board When the Position Sensor PC Board 51C See Figure 5 4 has been determinedthatitis defective and requires replacement proceed as follows 1 Remove power from the balance 2 Proceed to paragraph 3 1 1 Load Cell Removal and remove the Load Cell 51 from the balance 3 With the Load Cell 51 out of the Base 18 position the Load Cell with the Sensor board facing towards you 4 Markthe position of Sensor Bracketon Transducer Base Unsolder precision resistor and cable assembly See Figure 3 1 Remove the 2 Hex head screws which secure Sensor PC board Bracket to Load Cell Base and remove Sensor PCB assembly 5 Install the new Sensor PC Board in the reverse manner from which it was removed Ensure assembly is mounted in marked position step 4 and Ratio Beam does not touch the Sensor PC Board Assembly Bracket 6 Proceed to paragraph 3 1 2 Load Cell Replacement and install the Load Cell back in to the balance Perform the Up Do
23. Voyager Explorer Pro Calibration Weight 210g 410g 500g 410g 100g Explorer Voyager Explorer Pro Calibration Weight 62g 110g 200g 210g 210g 100g Explorer Voyager Explorer Pro Standoff Explorer Voyager Explorer Pro Weight Arm Explorer Voyager Base Machined Explorer Voyager Explorer Pro Base Machined Analytical Explorer Voyager Foot Explorer Voyager Explorer Pro Level Explorer Voyager Explorer Pro Label FCC Explorer Voyager Explorer Pro Knob Plate Explorer Voyager Explorer Pro 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 CHAPTER 5 DRAWINGS AND PARTS LISTS STOP SCREW Lever Ratio Beam o E c gt bus c pe e E mE gt lt NOTE Figure 5 4 Exploded View of Analytical Load Cell 5 8 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 4 Analytical Load Cell Parts List TABLE 5 4 ANALYTICAL LOAD CELL PARTS LIST See Figure 5 4 KEY NO PART NO DESCRIPTION 51A 12106751 Flexure Load Kit of 3 Explorer Voyager 51B 12106732 Guide Assembly Top Explorer Voyager Analytical 51C 00228006 Posi
24. adjusted by means of the cornerload screws but by removing material from its top This is achieved by a few strokes with a nibler file exerting slight pressure as you pull the file towards you CAUTION Do not attempt to adjust if more than 5 counts out If more than 5 counts return to factory for repair File only in positions shown in Figure 4 6 On completion of the adjustments clean filing sites by removing residue with adhesive tape See Figure 5 6 for following steps 1 With power removed temporarily install the four Pan Mounts 2 and weighing Pan 1 level the balance then apply power 2 Perform off center load test and determine error 3 Remove Pan 1 4 Determine associated filing position per Figure 4 8 Perform adjustment as required 5 Repeat above steps until balance is within tolerance as per table 4 1 6 Turn the balance OFF and remove power 7 Remove the Pan 1 and Pan Mounts 2 8 Install the Housing Cover 4 into place on the Base 19 and secure with the three Cover Housing Screws 3 and one Flat head Screw 37 9 Install the four Pan Mounts 2 onto the posts of the Overload Protection 18 10 Replace the Pan 1 CHAPTER 4 TESTING 4 2 3 Linearity Test The Linearity testis usedto determine the span and linearity of the balance throughout its operating range andis in accordance with the specifications listed in Tables 1 2 1 3 and 1 4 The masses used to perform this test must mee
25. aligned vertically 5 Tighten the upper screw 6 Insert the lower flexure screw but do not tighten Make sure the Torsion Protector is installed 7 Loosen screws a Fig 3 3 and remove the shims 8 Adjust the height of the hanger to 8 mm 0 315 in 9 Tighten the lower flexure screw insuring that the torsion protector in touching the side of the hanger 3 4 Figure 3 2 Analytical Sensor Board Adjustment Locations and Connections 425 025 Gee US ENS SA Figure 3 4 Installing Vertical Flexure CHAPTER 3 REPAIR PROCEDURES 3 1 7 Analytical Load Cell Upper Flexure Arm and Lower Flexure Arm Removal Installation Refer to Figures 3 5 3 6 and 5 4 for the following procedure CAUTION Beforethe Upper or Lower Flexure Arms can be removed the the Load Flexure must be removed and the Hanger secured to the base of the Transducer with two screws removed from the Bottom Mounting Plate This is necessary to prevent further damage from occuring when trying to re move and replace individual Flexures 1 Atthetop ofthe Load Cell Assembly 51 remove the two Screws and Washers which secure the Pan Support to the Hanger 2 Remove the three screws which secure Bottom Mounting Plate to Load Cell Base 3 Remove Vertical Flexure per paragraph 3 1 5 4 Carefully loosen the two Screws located at the rear ofthe Upper Flexure Arm and the rear of the Lower Flexure Arm d These are
26. and screw firmly so that a slight pressure causes the Holders to rest on the Weights 3 16 CHAPTER 3 REPAIR PROCEDURES 3 1 26 Changing Servomotor on High Capacity Top Loader Balance NOTE The replacement motoris supplied without eccen tric and without motor holder the corresponding parts of the old motor should be used 1 Referto paragraph 3 1 20 and remove Servomo tor 2 Detach eccentric and motor holder from the mo tor needed for the new motor 3 Unscrew fastener screw of the eccentric from the new motor 4 Attach eccentric to new motor loosely 5 Carefully by hand turn motor shaft to top posi TOP POSITION a 6 Position eccentric on the motor spindle so that it is shifted one lock in position counterclockwise a Screw eccentric firmly in place and then fasten motor holder See Figure 3 24 7 Install motor and calibration bracket During installation ensure there is sufficient play be tween the eccentric of the motor and the calibra tion bracket 8 Insert calibration weights Align calibration weight holder parallel with the edge of the frame profile and screw firmly so that a slight pressure causes the holders to rest on the weights Figure 3 24 Servomotor Installation 3 17 CHAPTER 3 REPAIR PROCEDURES 3 1 27 Vertical Stop Adjustment for Monoblock in High Capacity Top Loader Balance Figure 3 25 Positio
27. checked orreplaced in necessary and the magnet system is cleaned 2 Place the lever in the chassis and lock by turning the up down stop to the original position 3 Install the Ohaus fixture included in part number 476001 020 This will give allthe proper distances 4 Install the lateral stop Make sure the post is centered in the hole 5 Solderthe contact strips Make surethe strips are parallel 6 Install the magnet holder 7 Installthe Vane and center itin the detector hous ing 8 Remove the fixture PA Figure 3 9 Installing Lever and Coil 3 1 11 Monoblock Load Cell Removal Precision Top Loader Balance and Analytical Refer to Figures 5 1 and 5 3 in Chapter 5 for location of components called out in this procedure To remove the Monoblock Load Cell proceed as follows See Figure 5 1 for steps 1 through 5 1 With the balance turned OFF and unplugged remove the Pan 1 2 Remove Wind Shield 2 if applicable or Draft Shield 3 Remove the four Corner Spacers 5 if required 4 Remove two Screws 2 and Lockswitch Cover Seal 4 5 Remove the Cover 6 from the Base See Figure 5 3 for remaining steps 6 Remove the two Hex Screws 1 from the Subplatform 2 if required 7 Remove the Subplatform 2 if required 8 Remove two Screws 3 which secure Shield 4 in place 9 Remove Shield 4 from the balance CHAPTER 3 REPAIR PROCEDURES 3 1 11 Monoblock Load Cell Removal Precision Top Loader Ba
28. communication has failed or passed A 3 APPENDIX A EXPLORER EP LOADER 7 Personality Data Label Entry 1 Locate the Personality Data Label on the balance Refer to Figure 1 d The data will be located on the RF shield CAUTION This software cannot be used to download personality data for models having internal calibration AutoCal Only the TC data can be downloaded Fit manufacturing link through this access hole Data labels may be affixed to the other side of this O _ O a TC Data Label FRONT OF BALANCE Figure A 1 RF Shield 2 Inthe same order as listed on the label input the Personality Data Label information into the Personality Data grid of the EP Loader After entering the data in Figure A 2 the loader willlook like the picture below See next page for display 610 x 1 mg 00000768C1A2 04 08 2003 83C1 O3E4 F92F 1C52 2990 070C 42CF 17E7 AB2F B70F OF3B 7403 4FB4 01 0 9 06 2 1C46 6957 OF38 475A 4C5F CB83 8C1A F8DB 1DA6 2957 1F50 408A 486D 7 0032 F92F 1C52 2957 OF38 408A 4EB6 81E1 Figure A 2 Personality Data 4 APPENDIX A EXPLORER EP LOADER 7 Personality Data Label Entry Cont 3 Confirm that the Balance Personality Data from the label matches the data that was inputted into the Personality Data section of the EP Loader If not edit the data If only the personality data is to be loaded uncheck the TC Data bo
29. folder This folder will contain bank files with the extension HOO HO1 HOX There will also be at least 1 text file named nlogo txt Additional files may be present but are not essential Connect your computer to the balance Turn the balance on The display will read Verify flash bank checksum followed by individual lines for each bank and the status failed Use a program such as Hyper Terminal to test the communications from your computer to the balance The settings while the service pins are shorted are 9600 baud Parity None Data Bits 8 Stop Bits 1 Handshake None Send the balance a V command to test communications balance will respond with the software version Start the Flash Programmer from your programs menu Note the communication settings and if necessary change to match the communications port you are using You should not have to change the other parameters The communications port settings are displayed at the top of the screen and can be changed by clicking the comm setup button and selecting the appropriate settings from the pick list PLEASE NOTE THE TEST COMM Button does not function in this software If you need to test the communications use Hyper terminal or another program KA voyager Flash Utility 3 1 COM 1 3600 N 8 1 Location of Data files Voyager Pro c splorerv ovagerNoseFlash B ankfilesVv oyProt Explorer Pro c ExploreryoyagerNoseFlash B ankfiles E pPro1 Gian
30. from the Base 18 there is a small cable from the Sensor Board which should also be disconnected from the PC Board not shown on Figure 5 3 The Load Cell 9 should now be exposed for adjustments 11 Reinstall the Pan 5 Figure 5 2 into the exposed Load Cell NOTE Do not attempt these adjustments on the balance unless the balance is free from drafts and is level The balance is very sensitive and adjustments will be affected 12 Plug the power cord into the balance and turn the balance on 13 Place 1 2 of the balance capacity on the center of the Pan 5 Figure 5 2 14 Press the gt O T lt button to return the displayed weight to Og Slide mass front back left and right to Pan edge Note displayed values Correct any errors by turning Cornerload Adjusting Screws shown in Figure 4 4 adjust the Hex Nut portion and ensure center screw does not turn ADJUSTMENT SCREWS Figure 4 4 Analytical Off Center Load Adjustments Diagram 4 3 CHAPTER 4 TESTING 4 2 2 Off Center Load Test Cont Adjustmentfor Analytical Balances Cont 15 16 17 18 19 20 21 22 23 Repeat the Off Center Load Test Turn the balance OFF and unplug power cord Remove the Pan 5 Remove cable extenders connect the two cable connectors from the Analytical Load Cell 9 to the Main PC
31. hand tools and the repair and use of precision instruments Theservice strategy for Explorer balances is the replacement of PC boards membrane switches and most case parts The transducers are to be repaired Only parts listed in the parts list are replaceable To service an Explorer Pro or Voyager balance the display module must be removed and an Explorer display module substituted This is required in order to use the service software that is in the processor that is located on the Main PCB See illustration below Explorer Explorer Pro Voyager N Display Module PRECISION PRECISION L Display Module HIGH CAPACITY HIGH CAPACITY HIGH CAPACITY 1 1 CHAPTER 1 INTRODUCTION 1 1 INTRODUCTION Cont The contents of this manual is contained in five chapters with three appendices Chapter 1 Introduction Contains information regarding servicefacilities tools test equipment calibration masses and specifications Chapter 2 Diagnosis Contains a diagnostic guide for troubleshooting problems and error code tables Chapter 3 Repair Procedures Contains disassembly assembly and replacement procedures Chapter 4 Testing Contains an operational test a segment display test and performance tests Chapter 5 Drawings and Parts Lists Contains exploded view drawings with associated parts lists Appendix A Explorer EP Loader Contains information on loading software to place the Explor
32. overload protection 2 Unscrew the three fastener screws of the Position Sensor Assembly 3 Raise the Position Sensor Assembly which is held by the magnetic field 4 f the Position Sensor Assembly has to be changed unsolder Flexible Board 1 see Figure 3 10 POSITION SENSOR ASSEMBLY 102 Figure 3 10 Removing Position Sensor Assembly from Monoblock 3 9 CHAPTER 3 REPAIR PROCEDURES 3 1 14 Installing the Position Sensor Assembly for Monoblock Precision Top Loader Balance 1 Mount Position Sensor Assembly align centrally on the lateral stop pin 1 Figure 3 11 of the lever and fasten with the three screws Please note The flange of the Position Sensor Assembly is prebentto ensure its precise positioning after screwing on Please do not attempt to bend it straight Figure 3 11 Position Sensor Assembly Mounting 3 1 15 Changing the Load Cell Board for Precision Top Loader Balance 1 Unsolder Temperature Sensor board cable 1 Figure 3 12 2 Unsolder position Sensor Assembly from cell board 2 3 Disconnect main PC board cable connector 3 4 Remove Load Cell Board screw and change board CAUTION When screwing in first turn the self tapping cell board screw in a counterclockwise direction until the first screw thread engages and then tighten it Figure 3 12 Changing Load Cell Board 3 10 Figure 3 13 Monoblock Assembly
33. the screws which hold the Flexures in place Do not touch the two rear most screws with the nuts on top as these are the adjustment screws 5 Atthe front of the Load Cell Assembly 51 insert the two Shims included in kit 476001 02 be tween the Hanger and the Load Cell Base with the open slotted end in first see Figure 3 5 The slots should be aligned so that the screw holes inthe Center postto the Load Cell Base are visible 6 Take the two Screws removed from the Platform Mounting Assembly and install them in the Cen ter Post through the slots in the Shims Finger tighten the screws Figure 3 6 Hanger Positioning 10 Examine each Flexure Each one must be perfectly straight Replace any Flexure which is bent twisted cracked or deformed in any manner 11 To replace a defective Flexure remove the Screw and Washer which secures the Flexure 7 Fully tighten the two screws which hold the Shims to the Upper or Lower Flexure Arm Replace as in place required NOTE 12 To install Upper and or Lower Flexure Arms Do not remove the Upper or Lower Flexure Arms perform steps 8 and 9 in reverse order unless there is evidence of damage to one or more 13 Install Vertical Flexure per Paragraph 3 1 4 8 Toremove the Upper Flexure Arm from the Load 14 Remove screws holding Shims and remove Cell Assembly 51 removethe four Screws and shims Washers one at each Flexure point 15 Secure Pan Sup
34. time lt 4 seconds Sensitivity drift PPM C 3 10 C 30 C Operating temperature range w internal calibration 10 to 40 C 50 to 104 F w o internal calibration 10 to 30 C 50 to 86 F Power requirements External Adapter 100 120 V ac 220 V ac 50 60 Hz Plug configuration for US Euro UK Japan amp Australia 1 4 CHAPTER 2 DIAGNOSIS 2 1 TROUBLESHOOTING This section of the manual specifies problem areas of the balance which can occur Information is contained to isolate specific problems using Table 2 1 Diagnostic Guide and Error Codes Tables 2 2 through 2 4 Follow all directions step by step Make certain that the work area is clean and use care when handling components of the balance 2 2 DIAGNOSTIC GUIDE Table 2 1 is a diagnostic guide designed to help locate the problem area quickly and easily To use the table first locate the symptom that you are observing Followthe symptom column and review the probable cause column and remedy column The probable causes are listed with the most common cause first If the first remedy does not fix the problem proceed on to the next remedy Before attempting to repair the balance read all chapters of this manual to familiarize yourself with the balance components and operation Do not attempt repairs unless you fully understand the operation of the balance 2 2 1 Diagnosis 1 lsolate and identify the symptom 2 Refer to Table 2 1 Diagnostic guide and locate the symptom 3
35. 13 Carefully position the display flush with the top of the balance and press into position The tabs underneath the balance should lock into place 14 Reconnect power to the balance INSERT RIBBON CABLE FROM MAIN PCB ASSEMBLY GROUNDING STRAP RIBBON CABLE CONNECTOR END MOUNTING SCREWS MEMBRANE SWITCH RIBBON CABLE COVER WIRES TO BULB ON LCD ASSEMBLY COVER CLIP BULB CONNECTOR Figure 3 31 Rear View of Display PCB Assembly 3 30 CHAPTER 3 REPAIR PROCEDURES 3 2 13 Bulb Replacement This procedure describes the replacement of the Bulb on the LCD Display Assembly See Figure 3 32 NOTE This procedure requires that all hardware items that are removed be saved as they are not available as spare parts 1 Remove the Display module as per paragraph 3 2 11 2 Proceed with paragraph 3 2 12 and perform steps 1 through 6 3 Remove the two Plastic Push In Fasteners from the Bracket on the LCD Assembly These can be removed easily by turning the LCD Assembly over and pushing the on center portion of the Fasteners Turn the LCD Assembly back over and remove both pieces of the Fastener 4 Remove the Bracket from the LCD Assembly 5 Slide the Diffusion Panel out from the LCD Assembly 6 The Bulb has two End Caps slide both End Caps off of the Bulb See Figure 3 32 7 Using a low wattage soldering iron unsolder wire at each end of the Bulb 8 Slide the Bulb out from the Diffusion Panel 9 Insert the re
36. 3 11 Remove the four screws 8 holding the Internal Calibration Mechanism 10 andliftoutthe Internal Calibration Mechanism Avoid touching the internal calibration mass 12 Turn the balance over on its side and while holding the Analytical Load Cell with one hand remove the three Screws 24 and Washers 23 from the bottom of the balance The Load Cell can now be removed CAUTION EXTREME CARE MUST BE EXERCISED SO AS NOT TO DAMAGE THEFLEXURE ARMS FLEXURES THE RATIO BEAM FLEXURES THELOAD FLEXURE OR ANY OTHER SUPPORT MEMBER DAM AGE TO ANY ONE OR MORE OF THESE COMPONENTS WILL DESTROY THE ACCURACY OF THE BALANCE NOTE Visually inspect the Load Cell Assembly for bent cracked or distorted Flexures Each Flexure should be perfectly straight If itis determined that a Flexure requires replacement refer to paragraph 4 3 6 for the Upper Flexure Arm and Lower Flexure Arm removal procedure 3 1 CHAPTER 3 REPAIR PROCEDURES 3 1 2 Analytical Load Cell 9 Replacement After the Load Cell Assembly has been repaired it is installed as follows 1 Carefully align the Analytical Load Cell 9 in the Base 18 Figure 5 3 so that there is equal space on both sides of the Analytical load Cell to the base sides This is very important as the Balance will not function properly and may drift 2 Secure the Load Cell 9 to the Base 18 with the three Screws 24 Washers 23 previously removed at the bottom of the Base 18 Make sure th
37. 630348E 13 5 45 6754069 796256E 01 20 Figure 2 TC Data 2 Identify the values labeled in the diagram as to J if the balance does not have internal calibration only A to will be on the label Then input into the TC Data location of the EP Loader accordingly The Loader will look like the picture on the next page B 4 APPENDIX B EXPLORER PRO EP LOADER B 6 Temperature Compensation TC Data Entry Cont KA EP Loader Eile File Help Personality Data DL b _ C i 11 C C C C 0 0 0 D v 2 TC Data B D E 1 269961 e 20 3 713840 11 8 802111 01 3 161547 14 3 580244 04 F G H J 1 857251e405 6 263358e 06 DCODE 65535 Data 1 Download Personally Data Clear Comm Setup TC Data COM1 2400 n 7 2 LABEL2 TXT a When the first entry of the AutoCal TC data H is entered the main screen will change See next page The added grid is for loading the AutoCal data B 5 APPENDIX B EXPLORER PRO EP LOADER B 6 Temperature Compensation TC Data Entry Cont 8301 03 4 32 fics2 2990 0702 42cr 17 7 34D Bzor 0 38 7403 4 4 06 92 1246 6957 0 38 4C5F cB83 fecia ipae 2957 50 4860 1 2032 92 1652 2957 forse 408 4 81E 1 565310
38. CD Assembly 1 Remove the Display module as per paragraph 3 2 11 2 Turn Display Module over exposing Display PCB Assembly See Figures 3 31 and 5 9 3 Carefully unplug the Membrane Panel Switch Ribbon Cable from the Display PCB Assembly Connector 4 Remove the four 4 Mounting Screws from Display PCB Assembly and remove the Display PCB Assembly The LCD Assembly Board is attached to the Display PCB Assembly with four screws See Figure 5 9 5 Turn the Display PCB Assembly over and remove the four screws which mount the LCD Assembly Board to the Display PCB Both boards should now be separated Disconnect the Bulb Connector cable from the Display PCB Assembly Either board can now be replaced See Appendix D for Bottom Board replacement 6 See paragraph 3 2 13 for Bulb replacement Ifthe Bulb is not going to be replaced continue with this procedure 7 Assembly both boards together using the four Screws previously removed and reconnect the Bulb Connector 8 Place the PC boards into position over the four plastic guide posts which are slotted 9 Screw the four 4 40 x 3 16 Mounting Screws into the raised guides and secure both boards 10 Graspthe loose end of the Membrane Switch Ribbon Cable and insert into the connector on the Display PCB Assembly 11 Securethe grounding strap using the hardware previously removed 12 Plugthe ribbon cable from the balance Main PCB Assembly into the connector on the end of the Display PCB Assembly
39. E 2 4 EXPLORER PRO ERROR CODES Displays Error 1 0 Usually caused by static discharge If the error persists replace the PCB Displays Error 1 1 Temperature channel duty cycle out of range Failed temperature sensor or broken wire between the temperature sensor and the PCB Displays Error 2 0 Unable to stabilize within time limit after pressing the tare button Look for something touching any moving part of the transducer Could be a problem with the transducer itself Displays Err 3 0 The zero has changed enough to make the internal calibration data incorrect perform MFG and MFGWT ifthe unit has internal calibration AutoCal Displays Error 3 1 Unable to get stable data during an internal calibration 1 Wasthe balance warmed up 2 Doesthe balance repeat This would indicate a problem with the transducer Place a draft shield over the balance Displays Err 3 2 Incal motor has not stopped in time Check motor motor control and weight positioning setup Displays Error 8 0 amp Error 8 1 This is a hardware error It could be caused by the PCB Transducer or the inter connections Displays Err 8 3 Power on load out of range Overload extra weight on pan Displays Err 8 4 Power on load out of range Pan missing or wrong pan that is too light Displays Err 8 5 Internal calibration weight sensor indicates the weight is onthe pan Check the connection between the calibration unit and the main PCB Could be a problem with the cali
40. KEY NO 1 1 NOTES PART NO 11136410 11136409 11136406 11108417 80850042 11108407 11136713 11136714 DESCRIPTION Switch Membrane Voyager Switch Membrane Explorer Pro LCD Display PCB Top Explorer Pro Voyager Bulb Replacement Explorer Pro Voyager In use cover Explorer Explorer Pro Voyager Not shown LCD Display PCB Bottom Explorer pro Voyager Voyager Pro no PSD or software LCD Display PCB Bottom Explorer Pro w PSD LCD Display PCB Bottom Voyager Pro w PSD 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 23 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 11 Exploded View of Voyager Explorer Pro High Capacity Display 5 24 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 12 Voyager Explorer Pro High Capacity Display Parts List TABLE 5 11 VOYAGER EXPLORER PRO HIGH CAPACITY DISPLAY PARTS LIST See Figure 5 11 KEY NO 1 1 NOTES PART NO 11136480 11108480 11136406 11108417 11108483 11136716 DESCRIPTION Membrane Switch Explorer Pro High Capacity Membrane Switch Voyager High Capacity LCD Display PCB Top Explorer Pro Voyager High Capacity Bulb Replacement Explorer Pro Voyager and Hig
41. PC board as shown on Figure 5 3 The Load Cell 9 Use cable extenders If internal calibration option is installed disconnect cable to J4 12 Carefully lift the PC Board 11 from the Base 18 there is a small cable from the Sensor Board which should also be disconnected from the PC Board not shown on Figure 5 3 13 Switch the following components from the defective Main PC Board to the replacement U5 EEPROM U10 IC U11 PSD 14 Install a replacement PC Board 15 Secure the PC Board 11 to the Base 18 with the two Screws 3 16 Connect the two cable connectors from the Load Cell 9 to the Main PC Board edge connectors J2 J6 and the Sensor Cable The Sensor Board Cable is located at the rear of the balance and may interfere with the operation of the balance if it is not positioned away from the Load Cell Dress the cables and make sure that the cables do not interfere with the Load Cell If internal calibration option is installed connect cable to J4 17 Install the Hex Screws 14 and Washers 25 the rear of the balance into the connectors 18 Install the Shield 4 back on the balance and secure with two Screws 3 Figure 5 3 19 Install the Subplatform 2 and secure with two Screws 1 20 Replace the Cover 14 and and secure with two Screws 2 making sure that the Lockswitch Cover Seal is in place Figure 5 1 21 Replace the four Corner Spacers 13 with the open ends facing out 22 Replace the Pan 5
42. able Change Mode Units Setup seconds after plugging it in and only when the balance has PT NEI MMMM been previously set with Type Approved Legal for Trade set Center Custom ON of Zero r4 17110771 BBHBBBH sss Use 4 keys to change press Enter press O T Figure 4 1 Segment Display When the balance is first turned ON and LFT has been previously set ON the following display will appear if LFT is set in the menu and the Lock Switch is set ON 1 LFE Hi When the balance is first turned ON and LFT has been z previously set ON the following display will appear if LFT is Figure 4 3 Countdown Display set in the menu and Calibration menu is locked and the Lock Switch is set ON UHRLU LAL SAFE Figure 4 2 LFT Displays CHAPTER 4 TESTING 4 2 PERFORMANCE TESTS ALL BALANCES Accurate performance of the Explorer balance is determined by a series of four performance tests The displayed readings are compared with the tolerances listed in Table 4 1 Tolerance values are expressed in counts A one count change is equal to the last digit shown on the balance display TABLE 4 1 TYPES OF PERFORMANCE TESTS PERFORMANCE TEST ANALYTICAL TOPLOADERTOLERANCE TOLERANCE 210 410 100 610 4100 6100 8100 12000 22000 32000 2100 4100 1000 Thefollowing performance tests are used to evaluate the balance operation before and after repairs Each balance tested must meetthe requirements spe
43. ata incorrect perform MFG and MFGWT ifthe unit has internal calibration AutoCal Displays Error 3 1 Unable to get stable data during an internal calibration 1 Wasthe balance warmed up 2 Doesthe balance repeat This would indicate a problem with the transducer Place a draft shield over the balance Displays Err 3 2 Incal motor has not stopped in time Check motor motor control and weight positioning setup Displays Error 8 0 amp Error 8 1 This is a hardware error It could be caused by the PCB Transducer or the inter connections Displays Err 8 3 Power on load out of range Overload extra weight on pan Displays Err 8 4 Power on load out of range Pan missing or wrong pan that is too light 2 3 CHAPTER 2 DIAGNOSIS 2 3 EXPLORER VOYAGER ERROR CODE TABLE Cont TABLE 2 2 EXPLORER VOYAGER ERROR CODES Cont Displays Err 8 5 Internal calibration weightsensor indicates the weight is onthe pan Check the connection between the calibration unit and the main PCB Could be a problem with the calibration mechanism or the main PCB Displays Err 9 1 Personality data corrupt Reload using EP Loader Displays Err 9 2 Serial number does not match The serial number chip U10 was not transferred to anew PCB If the correct U10 can not be found the main PCB must be replaced with a configured PCB Displays Err 9 3 Serial number does not match Unplug and try again If that fails reload personality data using EP Loader
44. ay PCB Assembly of the display module Refer to paragraph 3 2 8 for Display PCB replacement CAUTION BE CAREFUL NOT TO PULL THE RIBBON CABLE OUT OF THE CONNECTOR ON THE MAIN PCB ASSEMBLY INSIDE THE BALANCE 3 24 CHAPTER 3 REPAIR PROCEDURES 3 2 6 Removing the Display Module on Explorer Precision Loader Balances Cont Figure 3 26 Display Removal Installation for Explorer Precision Top Loader Balance 3 2 7 Removing the Display Module on Explorer High Capacity Top Loader Balances See Figure 3 20 1 Remove power from the balance 2 Remove Pan 1 and place balance with bottom facing you 3 Remove two screws from underneath the display 4 Underneath the front of the balance press the two tabs 1 towards the rear of the balance this will release the display 5 Carefully lift the display 2 up from the balance and swing towards the rear You will notice a grounding strap which is screwed into the base of the balance 6 Remove screw 3 and flat washer 4 from the grounding strap 7 Carefully unplug the Main PCB Assembly Ribbon Cable 5 from the connector on the Display PCB Assembly of the display module 3 25 CHAPTER 3 REPAIR PROCEDURES 3 2 7 Removing the Display Module on Explorer High Capacity Top Loader Balances Cont Figure 3 27 Display Removal Installation for Explorer High Capacity Top Loader Balance 3 2 8 Display Printed Circuit Board 1 Remove the Display Module as p
45. bration mechanism or the main PCB Displays Err 9 1 Personality data corrupt Reload using EP Loader Displays Err 9 2 Serial number does not match The serial number chip U10 was not transferred to anew PCB Ifthe correct U10 can not be found the main PCB must be replaced with a configured PCB Displays Err 9 3 Serial number does not match Unplug and try again If that fails reload personality data using EP Loader 2 5 CHAPTER 2 DIAGNOSIS 2 4 EXPLORER PRO ERROR CODE TABLE Cont TABLE 2 4 EXPLORER PRO ERROR CODES Cont Displays Err 9 4 Factory internalcalibration data failed checksum Perform MFG and MFGWT Ifthe problem persists reloadthe TC data If the problem still persists the main PCB must be reconfigured at Ohaus Displays Err 9 5 Factory calibration data failed checksum Perform MFG and MFGWT If the problem persists reload the TC data If the problem still persists the main PCB must be reconfigured at Ohaus Displays Err 9 8 User calibration data failed checksum Perform MFG Calibration For units with internal calibration also perform MFGWT Displays Err 9 9 Can not be fixed in the field the unit has to be temperature compensated 2 6 CHAPTER 3 REPAIR PROCEDURES 3 1 REPAIR PROCEDURES Depending upon the capacity of the balance one of three different types of load cells are used The analytical balances contain an analytical load cell or a Monoblock load cell and the top loader balances contain one of two st
46. cified in eachtest as well asthe specifications listed in Table 1 2 depending upon the model Before proceeding with the following tests all the procedures starting with paragraph 4 1 musthave been accomplished on the Balance first 4 2 1 Precision Repeatability Test Precision is aterm used in balance specifications which means the standard deviation of a set of similar weight readings To conduct a Repeatability Test proceed as follows 1 With the balance calibrated place a mass on the Pan equal to the capacity of the balance Record the reading 2 Remove the mass from the Pan the balance should return to Og Record the reading 3 Repeat steps 1 and 2 ten more times Subtract the lowest from the highest reading to determine the differ ence Maximum allowable difference is as listed in Table 4 1 4 f the balance does not meet specifications refer to Table 2 1 to determine the problem 4 2 2 Load Test The Off Center Load Test is used to determine whether displayed weight values will be affected by moving the sample to different areas of the Pan Test for Analytical Balances Place 1 2 of the balance capacity in the center of the Pan 1 Press the gt O T lt button to return the reading to zero Move the mass halfway between the center and the edge to the front of the Pan Note any differences in the displayed weight reading Repeat this test for the back left and right positions Maximum allowable change is per Tabl
47. crewtoholder See Figure 3 14 7 Take out centering pins 8 Screw Monoblock to formed chassis Ensure top edge of formed chassis is flush with the top of the Monovblock See Figure 3 17 109 9 Mount overload protection on the Monoblock Figure 3 17 Monoblock Mounting CHAPTER 3 REPAIR PROCEDURES 3 1 18 Vertical Stop Adjustment for Monoblock in Precision Top Loader Balance Note If the Position Sensor Assembly is changed it may be necessary to readjust the vertical stop Adjusting Vertical Stop 1 Attach voltmeter to 2 pin connector located at the top left corner of the Load Cell Board Apply power and turn on Note voltage value 2 Push down on overload protection until Lever is at the top of the vertical stop and then release overload protection Voltage value should be equal and opposite 3 If the two voltage values either side of zero are not of the same magnitude but e g 2 Volts and 1 6 Volts the vertical stop must be adjusted until the values are symmetrical Voltage range 1 8 2 5 Volts Asymmetry max 0 2 Volts 4 To adjust vertical stop turn vertical adjust ment screw Figure 3 15 item 3 and repeat step 2 until readings are symetrical 101 Figure 3 18 Position Sensor Connections 3 13 CHAPTER 3 REPAIR PROCEDURES 3 1 19 Monoblock Load Cell Removal from High Capacity Top Loader Balance Refer to Figure 5 6 in Chapter 5 for location of components called
48. cure the ground strap using the hardware previously removed 2 Plug the cable into the connector 5 on the PC board of the Voyager Display module See Figures 3 26 or 3 27 4 Carefully position the display flush with the top of the balance and press into position The tabs underneath the balance should lock into place 5 Replace the two screws underneath the balance if previously removed to secure the display in place 6 Reconnect power to the balance and check operation 3 28 CHAPTER 3 REPAIR PROCEDURES 3 2 11 Removing the Display Module Voyager and Explorer Pro Models See Figure 3 23 1 Remove power from the balance 2 Underneath the front of the balance press the two tabs 1 towards the rear of the balance this will release the display 3 Carefully lift the display 2 up from the balance and swing towards the rear You will notice a grounding strap which is screwed into the base of the balance 4 Remove screw 3 and flat washer 4 from the grounding strap 5 Carefully unplug the Main PCB Assembly Ribbon Cable 5 from the connector on the Display PCB Assembly of the display module CAUTION Be careful notto pull the RIBBON cable out of the connector on the main PCb assembly inside the balance Figure 3 30 Display Removal Installation 3 29 CHAPTER 3 REPAIR PROCEDURES 3 2 12 Display PCB LCD Assembly Replacement This procedure describes the replacement of either the PCB Assembly or L
49. d as follows 1 Unplug the balance 2 Remove Platform 1 and turn the balance so it stands on the rear portion 3 Remove the two screws 12 holding the Connector Plate 13 and Connector PCB 14 4 Remove the four Hex Nut screws 15 which secures the Connector Plate 13 to the Connector PCB 14 5 Disconnect Connector Board Cable 10 from Connector PCB 14 6 Disconnect Display Module Cable 16 from the Connector PCB 7 Replace Connector PCB and connect Display Module cable 16 8 Connect Connector Board Cable 10 to the Connector PCB 9 Install the four Hex Nut screws 15 which secures the Connector Plate 13 to the Connector PCB 14 10 Position the Connector Plate 13 over the holes on the side of the balance and install the two screws 12 11 Turn the balance in it s proper operating position and install the pan 1 12 Apply power to the balance 3 2 6 Removing the Display Module on Explorer Precision Top Loader Balances See Figure 3 26 1 Remove power from the balance 2 Underneath the front of the balance press the two tabs 1 towards the rear of the balance this will release the display 3 Carefully lift the display 2 up from the balance and swing towards the rear You will notice a grounding strap which is screwed into the base of the balance 4 Remove screw 3 and flat washer 4 from the grounding strap 5 Carefully unplug the Main PCB Assembly Ribbon Cable 5 from the connector on the Displ
50. de The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 13 CHAPTER 5 DRAWINGS AND PARTS LISTS Boxed items are not available for sale NOTE Figure 5 6 Exploded View of High Capacity Top Loader Balance Sheet 2 of 2 5 14 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 7 High Capacity Top Loader Balance Parts List TABLE 5 6 HIGH CAPACITY TOP LOADER BALANCE PARTS LIST See Figure 5 6 Sheet 2 KEY NO 2 11 18 26 35 NOTES PART NO DESCRIPTION 11107001 Pan Mount High Capacity 00239040 Cover Housing High Capacity 21201770 Main PCB High Capacity 11107022 Power Supply PCB High Capacity 21100246 Cable Coil 4 Position High Capacity 21100248 Cable Cell 8 Position High Capacity 21202417 Cable Main PCB to Power Supply PCB High Capacity 00239108 Overload Protection High Capacity 00239039 Cable Guide High Capacity 00239035 Plate Protective High Capacity 00239038 Plate Insulating High Capacity 00239034 Plate Shielding High Capacity 1 In all cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased fro
51. debris and is touching internal hook Zero has changed Defective power supply board Defective membrane switch Defective power supply board Defective cable Check replace power cord connec tions Check display module connections Replace display PC Board Replace membrane switch Replace IC U11 Replace cable Re route cables Clean or replace cover k Defective membrane switch Replace membrane switch Perform manufacturing calibration Replace power supply board Replace membrane switch Replace power supply board Replace cable Voyager Low and High capacity units start in Print menu Defective membrane switch Replace membrane switch Incorrect weight reading RS232 interface not working Random segments displayed or dis play locks up Balance was not re zeroed before weighing Balance not properly calibrated Defective damaged Transducer Print menu settings not properly set up Cable connections Defective main PC Board Microprocessor locks up Defective main PC Board Defective Display PC Board Press gt with noweightonthe pan then weigh item Recalibrate correctly Troubleshoot amp repair Transducer Verify interface settings in RS232 menu correspond to those of periph eral device Check cable connections Replace main PC Board Turn power off then turn on again If condition persists unit must be ser viced Replace main PC board
52. e 4 3 for each of the listed balances four positions To correct an off center load error proceed as follows Adjustment for Analytical Balances This adjustment requires that the balance be partially disassembled to gain access to the Load Cell for adjustments Refer to Figures 5 2 and 5 3 in Chapter 5 for location of components called out in this procedure Cable extenders are required for the Main PC Board which must be operational for Load Cell adjustments See Figure 5 2 for steps 1 through 4 1 With the balance turned OFF and unplugged open the Draft Shield door and remove the Pan 5 2 Remove Cover Plate 6 3 Inside of the Draft shield remove two Screws 2 and Lockswitch Cover Seal 1 4 Carefully lift the Draft Shield from the balance Base and set aside 4 2 CHAPTER 4 TESTING 4 2 2 Off Center Load Test Cont Adjustmentfor Analytical Balances Cont See Figure 5 3 for remaining steps 5 Remove two Screws 3 which secure Shield 4 in place 6 Remove Shield 4 from the balance 7 Remove the two Screws 3 on top of the PC Board 11 8 Remove the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors on the PC Board 11 9 Disconnect the two cable connectors from the Load Cell going to J3 and J6 on the PC board as shown on Figure 5 3 The Load Cell 9 Use cable extenders If internal calibration option is installed disconnect cable to J4 10 Carefully lift the PC Board 11
53. e Load Cell is properly aligned before tightening the screws 3 Install the Internal Calibration Mechanism back to the Base and secure using 4 screws previously removed 4 Connect the two cable connectors from the Analytical Load Cell 9 to the PC Board edge connectors J3 J6 and the Sensor Cable The Sensor Board Cable is located at the rear of the balance and may interfere with the operation of the balance if it is not positioned away from the Load Cell Dress the cables and make sure that the cables do not interfere with the Load Cell If calibration option is installed connect cable to J4 CAUTION Do not touch any connectors on Main or Position Sensor board Electrostatic discharge could damage components on the PCB s 5 Secure the PC Board 11 to the Base 18 with the two Screws 3 6 Install the Hex Screws 14 and Washers 25 at the rear of the balance into the connectors 7 Install the Shield 4 back on the balance and secure with two Screws 3 Figure 5 3 8 Install the Draft Shield and secure with two Screws 2 making sure Lockswitch Cover Seal 1 Figure 5 2 is in place 9 Replace the Cover Plate 6 and Pan 5 inside of the Draft Shield Figure 5 2 10 After assembly verify that the balance meets all specifications Perform all tests CHAPTER 3 REPAIR PROCEDURES 3 1 3 Analytical Load Cell Position Sensor Adjustment With Test Points When the Analytical Load Cell Assembly 9 has been repaired either an U
54. e SCREW HEADS to prevent movement CAUTION Load Force Coil Leveronly inthe direction shown by thearrow to ensure the Flexible Bearings are not compressed 10 Note the position of the Vertical Adjustment Screw 3 Turn Vertical Adjustment Screw so that the Lever can be withdrawn 11 Take out Centering Pin 1A and 1B 12 Carefully withdraw Force Coil Lever CHAPTER 3 REPAIR PROCEDURES 3 1 17 Installing the Force Coil Lever Assembly in Monoblock for Precision Top Loader Balance 1 Place Force Coil Lever assembly in the des ignated position check whether the alumi num sleeves are correctly positioned See Figure 3 16 2 Turn back vertical adjustment screw 3 to the original position See Figure 3 16 3 Insert centring pins in the holes provided 4 Insert the Force Coil Lever assembly fas tener screws and carefully tighten in the di rection shown by the arrow 2 5 Nm secur ing the NUTS to prevent movement Ensure that the Force Coil Lever remains in the middle at the front Figure 3 16 Force Coil Lever Installation CAUTION Load lever only in the direction shown by the arrow to ensure the flexible bearings are not compressed 5 Attach Load Cell Board Temperature Sensor Board and Position Sensor Assem bly and tighten screws 6 Hold contact board to ensure the fine coil wires can not tear off Then as described in paragraph 3 1 16 remove the screw 2 from thelever and s
55. e are two check fields to allow selections of Personality Data and or TC Data to be downloaded into the balance If both types of data need to be downloaded it can be done at one time To initiate download process single click the Download button on the EP Loader In the lower right hand corner of the EP Loader a status bar will appear to display the progress of the download After the data is downloaded an error message may be displayed Turn the balance off unplug it plug it back in and perform the MFG and if necessary the MFG WT calibrations If the error persists recheck the personality data and edit it as necessary A 10 Personality Data and TC Data The Personality Data and TC Data should be saved at this time as a complete file press Ctrl S on the keyboard or select File gt Save in the menu of the EP Loader For a new Data file created a Save As pop up screen will appear to allow the Data file to be saved under the desired filename To save an existing Data file under a different filename press Ctrl A on the keyboard or select File gt Save As in the menu of the EP Loader A 11 A Data Files To open an existing Data file press Ctrl O on the keyboard or select File gt Open in the menu of the EP Loader To open a recently used Data file select the desired file under the File menu of the EP Loader 12 Clear EP Loader 1 To clear data displayed in the EP Loader single click the Clear b
56. e right arrow once The balance will display CAL Press and release Enter Print The balance will display CAL TYPE Press and release Enter Print The balance will display MFg Press and release Enter Print The balance will display WORKING and a changing number The balance will then display PUT WT and a mass value Place masses totaling that value on the pan Press and release the Enter Print The balance will display WORKING and a changing number The balance will then display PUT WT and another mass value Place masses totaling that value on the pan Press and release the Enter Print The balance will display WORKING and a changing number 10 The balance will display CAL SET and return to the Weigh mode C 1 APPENDIX C PRODUCTION MODE CALIBRATION C 3 Manufacturing Weight Calibration MFgWt Procedure This calibration is required if the balance has internal calibration This procedure restores the internal weight calibration factor that is erased by the MFg calibration 1 Press and release Setup The balance will display MFGTEST Press and release the right arrow once The balance will display CAL Press and release Enter Print The balance will display CAL TYPE 2 3 4 Press and release Enter Print The balance will display MFg 5 Press and release the up arrow The balance will display MFgWt 6 Press and release Enter Print The balance will display INCAL The balance may also display Pan briefly If th
57. e servicing the balance determine what specifications are not met TABLE 1 2 ANALYTICAL SPECIFICATIONS Capacity 9 62 110 100 210 Readability mg Repeatability Std dev mg 0405 Linearity mg 0205 Tare range Full capacity by subtraction Safe overload capacity 150 of capacity Stabilization time 4 seconds Sensitivity drift PPM C 3 10 C 30 C Operating temperature range wiinternal calibration 10 to 40 C 50 to 104 F w o internal calibration 10 to 30 C 50 to 86 F Power requirements External Adapter 100 120 V ac 220 V ac 50 60 Hz Plug configuration for US Euro UK amp Australia TABLE 1 3 PRECISION TOP LOADER SPECIFICATIONS Capacity 9 210 410 4100 6100 8100 Readability 0 0 1 Repeatability Std dev 0 0 05 Linearity 9 0 1 Tare range Full capacity by subtraction Stabilization time lt 3 seconds Sensitivity drift PPM C 4 3 4 3 4 3 4 3 10 C 30 C Operating temperature range w internal calibration 10 to 40 C 50 to 104 F w o internal calibration 10 to 30 C 50 to 86 F Power requirements External Adapter 100 120 V ac 220 V ac 50 60 Hz Plug configuration for US Euro UK amp Australia TABLE 1 4 HIGH CAPACITY TOP LOADER SPECIFICATIONS Capacity 0 32 0000 0 1 Readability g Repeatability Std dev g 0 1 Linearity g 0 4 Tare range Full capacity by subtraction Safe overload capacity 150 of capacity Stabilization
58. ecked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual Ohaus replacement parts warranty only applies to parts purchased from Ohaus Corporation 5 3 CHAPTER 5 DRAWINGS AND PARTS LISTS al Balance Figure 5 2 Overall Exploded View of Analytic CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 2 Analytical Base Parts List KEY NO NOTES TABLE 5 2 ANALYTICAL BASE PARTS LIST See Figure 5 2 PART NO DESCRIPTION 11108322 Seal LFT Cover Explorer Voyager Explorer Pro 11108701 Top Door Assembly Explorer Voyager 11108702 Right Door Assembly Explorer Voyager 11108704 Pan Assembly 3 5 Explorer Voyager Explorer Pro 11108700 Pan Assembly 4 75 dia Explorer Voyager Explorer Pro 400021 01 1 Plate Cover Explorer Voyager 80250073 Clamp Explorer Voyager Explorer Pro 11108703 Left Door Assembly Explorer Voyager 11108705 Window Front Explorer Voyager 11136765 Draft Shield Column Assembly Right Explorer Voyager Explorer Pro 11136764 Draft Shield Column Assembly Left Explorer Voyager Explorer Pro 11136701 Top Door Assembly Explorer Pro 11136703 Left Door Assembly Explorer Pro 11136702 Right Door Assembly Explorer Pro 11103535 Window Front Explorer Pro 11136360 Plate Draft Shield Explorer Pro 11136710 Draft Shield assembly complete Explorer Voyager Explorer Pro 1 Inall cases where a part i
59. ents the cables and make sure that the cables do not interfere with the Load Cell If calibration option is installed connect cable to J4 9 Reinstall the PC Board and secure with two screws 3 10 Install the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors on the PC Board 11 11 Install the Shield 4 back on the balance and secure with two Screws 3 Figure 5 3 12 Install the Pan Support 2 and secure with two Screws 1 13 Replace the Cover 6 and and secure with two Screws 3 making sure that the Lockswitch Cover Seal 4 is in place Figure 5 1 14 Replace the four corner pan Spacers 5 15 Replace the Pan 1 and Windshield 2 if applicable 4 6 CHAPTER 4 TESTING 4 2 2 Off Center Load Test Cont Adjustment for Monoblock used in High Capacity Top Loader Balances 120000 to 320000 This adjustment requires that the balance be partially disassembled to gain access to the Load Cell for adjustments Refer to Figure 5 6 in Chapter 5 for location of components called out in this procedure 1 With the balance turned OFF and unplugged remove the Pan 1 2 Remove the four Pan Mounts 2 3 Remove the three Cover Housing Screws 3 and one Flat Head Screw 37 which secure Housing Cover 4 to Base 19 4 Remove the Housing Cover 4 The large monoblock is now visable Adjusting the Cornerload on High Capacity Top Loader Balances The Monobloc measuring cell is not
60. er balance in a manufacturing mode to download temperature and personality data Appendix B Explorer Pro EP Loader Contains information on loading software to place the Explorer Pro balance ina manufacturing mode to download temperature and personality data Appendix C Production Mode Calibration Contains calibration information in a production mode Before servicing the balance you should be familiar with the Instruction Manual which is packed with every balance 1 2 SERVICE FACILITIES DO NOT SERVICE the balance Nextto open windows or doors causing drafts or rapid temperature changes e Near air conditioning or heat vents e Nearvibrating rotating or reciprocating equipment Near magnetic fields or equipment that generates magnetic fields e Onanunlevel work surface Allow sufficient space around the instrument for ease of operation and keep away from radiating heat sources M ae ff Li m 1 2 CHAPTER 1 INTRODUCTION 1 3 TOOLS AND TEST EQUIPMENT REQUIRED In orderto properly service the Ohaus Explorer balances certain Ohaus specialtools and test items are required in addition to standard electronic tool kits These items are listed as follows 1 3 1 Special Tools o 476000 03 Monoblock service tool kit 476001 02 Analytical service tool kit 11108525 Explorer Display Module Capacities to 8kg 450111 010 Explorer Disp
61. er paragraph 3 2 6 or 3 2 7 depending upon type of balance 2 Turn Display Module over exposing Display PCB Assembly See Figure 3 28 3 Carefully unplug the Membrane Panel Switch Ribbon Cable from the Display PCB Assembly Connector 4 Press the two plastic Clips which hold the Display PCB Assembly in place outward to release the Display PCB Assembly and remove the PCB Assembly 5 Position the replacement Display PCB Assembly in place make sure the Membrane Switch Ribbon Cable passes through the hole on the Display PCB Assembly then press the Display PCB Assembly in place The Clips should grasp the Board 6 Grasp the loose end of the Membrane Switch Ribbon Cable on the Display PCB Assembly and insert into the connector on the Display PCB Assembly 7 Plug the ribbon cable from the balance Main PCB Assembly into the connector on the end of the Display PCB Assembly 3 26 CHAPTER 3 REPAIR PROCEDURES 3 2 8 Display Printed Circuit Board Cont 8 Secure the grounding strap using the hardware previously removed 9 Carefully position the display flush with the top of the balance and press into position The tabs underneath the balance should lock into place 10 Reconnect power to the balance INSERT RIBBON CABLE FROM MAIN PCB ASSEMBLY GROUNDING STRAP R ASS RIBBON CABLE CONNECTOR END LOCATING PIN MEMBRANE SWITCH RIBBON CABLE MOUNTING CLIP MOUNTING CLIP COVER COVER CLIP Figure 3 28 Rea
62. est Points When the Analytical Load Cell Assembly 9 has been repaired either an Upper or lower Flexure Arm Assembly or Vertical Flexure has been replaced it may be necessary to adjust the Position Sensor Refer to Figures 3 2 5 3 and 5 4 1 Remove the Analytical Load Cell from the bal ance see paragraph 3 1 1 2 Plug the Position Sensor PCB Assembly Cable into the Main PC Board 11 Connect all cables and ensure the Pan is in place ADJUSTMENT SCREWS ENSOR PC BOARD PRECISION RESISTOR SENSOR PC BO CONNECTIONS SENSOR CABLE CONNECTIONS 3 Apply power to the balance 4 Observe the weight display Move the Position Sensor PCB until the display shows numbers Carefully tighten the adjustment screws 5 Reassemble the balance follow the procedure in paragraph 3 1 2 Analytical Load Cell Load Flexure Vertical Link Removal Referto Figure 3 3 1 Toprotectthe Flexure atthe Hanger loosely insert two mounting screws a Do not tighten 2 Loosen the lower flexure screw while holding the Torsion Protector b 3 Unscrew the upper screw c 4 Unscrew the lower screw and remove the flexure and spacers Analytical Load Cell Load Flexure Vertical Link Installation Refer to Figure 3 4 1 Set the Load Cell on the sensor board 2 Place the large Spacer I on the lever 3 Place the small Spacer on the Hanger 4 Laythe Flexure onthe Spacers with the round hole at the top The flexure should be
63. ger Error Code 2 3 24 Explorer Pro Error Code Table 2 5 CHAPTER 3 REPAIR PROCEDURES Repair PROCS OURS eee UU 3 1 3 1 1 Analytical Load Cell 00 4 4 800011 3 1 3 1 2 Analytical Load Cell 3 2 3 1 3 Analytical Load Cell Position Sensor Adjustment 3 3 3 1 4 Analytical Load Cell Position Sensor Adustment Without Test Points 3 4 3 1 5 Analytical Load Cell Load Flexure Vertical Link Removal 3 4 3 1 6 Analytical Load Cell Load Flexure Vertical Link Installation 3 4 3 1 7 Analytical Load Cell Upper Flexure Arm and Lower Flexure Arm Removal Installation 3 5 3 1 8 Removing the Lever and Coil 3 6 3 1 9 Replacing the Vertical Flexures Pillow Block Bearings 3 6 3 1 10 Replacing the Lever and trier tenores 3 7 3 1 11 Monoblock Load Cell Removal Precision Top Loader Balance and A MERITI 3 7 3 1 12 Monoblock Load Cell Replacement for Precision Top Loader and Analytical Balances puero 3 8 3 1 13 Position Sensor Assembly Removal from Monoblock in Precision Top Loader Balance tnde iecit 3 9 3 1 14 Installing the P
64. h capacity LCD Display PCB Bottom Voyager High Capacity no PSD or software LCD Display PCB Bottom Explorer Pro High Capacity wPSD 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 25 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 26 APPENDIX A EXPLORER EP LOADER A 1 Requirements for EP Loader e Pentium 90MHz or higher microprocessor e VGA 640x480 or higher resolution screen Microsoft Windows NT 4 0 or later or Microsoft Windows 95 or later e Minimum 24 MB RAM for Windows 95 98 32 MB for Windows NT Minimum 10 MB free space e CD ROM e RS232 cable Ohaus part number 5017 09 9 pin or 5017 02 25 pin e HyperTerminal or another communications program to verify the data e f the balance is a Voyager an Explorer display module will be needed 2 Limitations The EP Loader software can not be used to restore the personality data in an Explorer that has the internal calibration option Installing EP Loader Software 1 Insert the EP Loader CD into the CD ROM 2 Run the setup executable found on the EP Loader CD to start the installation wizard 3 Follow the instructions in the installation wizard 4 Ifthe CD is not available the software can be downloaded at the foll
65. he Lever Position Position Sensor Assembly See Figure 3 20 Sensor 2 Remove the Position Sensor Assembly Figure 3 20 Position Sensor Assembly Mounting 3 1 22 Installing the Position Sensor Assembly for Monoblock High Capacity Top Loader Balance 1 When replacing the Position Sensor solder in the reference resistor 2 Place the Position Sensor on the coil housing 3 Insert the three screws a and tighten See Figure 3 20 4 Adjust the Position Sensor as described in paragraph 3 1 27 NOTE Adjustment is possible only when the Monoblock is not yet screwed to the formed chassis 3 1 23 Removing the Force Coil Lever Assembly from Monoblock in High Capacity Loader Balance 1 Unscrew Contact Board b at the side Use care as the coil wires could break 2 Insert the Centering Pins c in the holes pro vided 3 Lift the Cover Plate d held in place by a magnetic field over the coil form 4 Carefully unscrew Lever Screws a while se curing the Locking Nuts on the opposite side Remove screws 5 Take out Centering Pins c 6 Note the position ofthe height adjustment screw f Turn the height adjustment screw f so that the Lever can be withdrawn Figure 3 21 Force Coil Removal 7 Carefully withdraw Lever 3 15 CHAPTER 3 REPAIR PROCEDURES 3 1 24 Installing the Force Coil Lever Assembly in Monoblock for High Capacity Top L
66. icroprocessor chip from the old board using a PLCC extractor Note the software version on the chip Install the chip into the new bottom board If necessary gently break away the excess pieces of the circuit board so that the board is the same shape and size as the old board and looks like the photo below Short the two pins shown below Remove the paper tab from between the battery and the positive terminal Reassemble the complete display assembly Reinstall the display assembly on the balance Reconnect the power to the balance Follow the Flash instructions below Explorer Pro Voyager and Voyager Pro Display Flash Instructions This software tool is used to load the flash bank files into the bottom board of the display after replacement of the bottom board After reassembling the balance follow these steps to load the flash bank files 1 2 Using an internet browser access the Docushare website at www fileshare ohaus com docushare Download the following files from the Explorer amp Voyager Display Flash folder Setup exe and the bank files matching the version of software marked on the microprocessor noted above D 1 APPENDIX D REPLACING BOTTOM DISPLAY BOARD D 2 Explorer Pro Voyager and Voyager Pro Display Flash Instructions Cont Install the flash loader program by running the Setup exe file and following the prompts of the install shield wizard Unzip the required bank files into their own individual
67. ied in Chapter 5 Drawings and Parts Lists The decision to replace any component should only be made after thoroughly diagnosing the problem If after the replacement of any component the balance is still nonfunctional and no other information on the subject is available in the manual contact Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 USA Tel 973 377 9000 Fax 973 593 0359 In the United States call toll free 800 526 0659 between 8 00 a m and 5 30 p m EST 3 2 1 Analytical Balances Main Printed Circuit Board See Figure 5 2 for steps 1 through 4 1 With the balance turned OFF and unplugged open the Draft Shield door and remove the Pan 5 2 Remove Cover Plate 6 3 Inside of the Draft shield remove two Screws 2 and Lockswitch Cover Seal 1 4 Carefully lift the Draft Shield from the balance Base and set aside See Figure 5 3 for remaining steps 5 Remove two Screws 3 which secure Shield 4 in place 6 Remove Shield 4 from the balance 7 Remove the two Screws 3 on top of the PC Board 11 8 Remove the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors on the PC Board 11 9 Disconnect the two cable connectors from the Load Cell going to J3 and J6 on the PC board as shown on Figure 5 3 The Load Cell 9 If internal calibration option is installed disconnect cable to J4 10 Carefully lift the PC Board 11 from the Base 18
68. in these grooves when being replaced 9 Connect Connector PCB Cable 10 located in the Base 19 to the Power Supply PCB 7 10 11 12 13 14 15 16 Facing the front of the balance insert the Power Supply PCB 7 into the slot closest to the left side of the balance The holes on the metal shield on the Power Supply PCB 7 should line up with the mounting holes on the Base 19 Still facing the front of the balance insert the replacement Main PCB in the remaining groove in the Base 19 Make sure the short Main PCB Cable 11 from the Power Supply PCB 7 passes through the access hole on the Main PCB The holes on the shield on the Main PCB should line up over the holes on the Power Supply PCB Install the two Protective Plate Screws 5 holding the Main PCB 6 and Power Supply PCB 7 Connect the Coil Cable Connector 8 Internal Calibration Assembly Cable 38 if supplied and the Cell Cable Connector 9 to the Main PCB 6 Replace three Cover Housing Screws 3 and one screw 37 which secures the Housing Cover 4 to Base 19 Install four Pan Mounts 2 Install the Pan 1 and apply power to the balance 3 23 CHAPTER 3 REPAIR PROCEDURES 3 2 5 High Capacity Top Loader Balances Connector Printed Circuit Board PCB Refer to Figure 5 6 in Chapter 5 for location of components called out in this procedure The Connector PCB is located on the left side of the balance To remove the board procee
69. is happens clear the pan or just press and release Enter Print if the pan is clear 7 You will hear the calibration drive motor turning The balance may go through a few repeat cycles This is normal if the environment is unstable You may see UNSTBLE this is also an indication that the environment is unstable Under these conditions the balance may not calibrate 8 The balance will then display PUT WT and a mass value Place masses totaling the requested value on the pan 9 Press and release Enter Print The balance will display WORKING and a changing number 10 The balance will then return to the weigh mode 2 APPENDIX D REPLACING BOTTOM DISPLAY BOARD This procedure is used when replacing the bottom display board on the Voager explorer Pro and Voyager pro balances D 1 Replacing the Bottom Display Board on Voyager Explorer Pro and Voyager Pro Balances D 2 The bottom board of the display can be replaced using the following steps l 2 3 10 11 12 13 14 15 16 Unplug the Balance Remove the complete display from the balance Disconnect the membrane switch ribbon cable from the bottom board Remove the 4 screws that hold the circuit board assembly into the housing and lift the assembly from the housing Disconnect the wire connector for the display back lighting from the bottom board Remove the 4 screws that hold the two circuit boards together Gently separate the two boards Remove the m
70. lance and Analytical Cont 10 Remove the two Screws 3 on top of the PC Board 11 11 Remove the Hex Screws 14 and Washers 25 atthe rear of the balance which secure the connectors on the PC Board 11 12 Disconnect the two cable connectors from the Load Cell going to J2 and J6 on the PC board as shown on Figure 5 3 The Load Cell 9 If internal calibration option is installed disconnect cable to J4 13 Carefully lift the PC Board 11 from the Base 18 there is a small cable from the Sensor Board which should also be disconnected from the PC Board not shown on Figure 5 3 14 Remove four screws holding Internal Calibration Mechanism and lift out the Internal Calibration Mechanism Avoid touching the internal calibration mass 15 Turnthe balance over on its side and while holding the Monoblock Load Cell with one hand remove the three Screws 24 and Washers 23 from the bottom of the balance The Load Cell 9 can now be removed 3 1 12 Monoblock Load Cell Replacement for Precision Top Loader and Analytical Balances After the Monoblock Load Cell Assembly has been repaired it is installed as follows 1 Carefully align the Monoblock Load Cell 9 in the Base 18 Figure 5 3 so that there is equal space on both sides of the Monoblock load Cell to the base sides This is very important as the Balance will not function properly and may drift 2 Secure the Monoblock Load Cell to the Base 9 with the three Screws 24 Washers
71. lay Module Capacities over 12kg AS017 09 Interface cable 9 Pin or ASO17 02 Interface cable 25 Pin 1 3 2 Standard Tools and Test Equipment 1 2 8 9 Digital Voltmeter DVM Input impedance of atleast 10 megohms in the 1 Volt dc position Torx driver Set Torque wrench optional with a Phillips head bit Tork bits Allen bits SAE and Metric Box wrench 7mm Nutdriver 3 16 Hex or Allen key wrenches 7 16 9 64 or 3 32 M3 SAE and Metric Set Other assorted hand tools tweezers adjustable open wrenches etc Soldering iron 50 watt and solder rosin core solder not acid core Solder remover 10 Computer with at least 1 com port 11 Acommunications program similiar to Hyper Terminal supplied with Windows 1 4 TEST MASSES REQUIRED The masses required to test the Ohaus Explorer balances must meet the requirements of ASTM Class 1 Tolerance The calibration points are listed in Table 1 1 Use the least number of masses to reach the total TABLE 1 1 CALIBRATION POINTS LINEARITY SPAN CAPACITY MASSES TOTALING MASSESTOTALING 209 509 509 1009 1009 2009 2009 4009 2009 5009 10009 20009 20000 40000 20000 50000 40009 8000g 5000g 10000g 100009 200009 150009 300009 CHAPTER 1 INTRODUCTION 1 5 SPECIFICATIONS Complete specificatons for the Ohaus Explorer balances are listed in Tables 1 2 1 3 and 1 4 When a balance has been serviced it must meet the specifications listed in the table Befor
72. libration see the calibration section ofthe instruction manual ASTM Class 1 Masses must be used for the calibration only The test can be performed using utility masses Place the test mass on the pan and record the weight Remove the test mass and place Load 1 on the pan Zero the balance Place the test mass on the pan and record the weight Remove the test mass and place Load 2 on the pan Zero the balance CON CO Place the test mass on the pan and record the weight 9 Remove the test mass and place Load 3 on the pan 10 Zerothe balance 11 Place the test mass on the pan and record the weight 12 Remove the test mass and place Load 4 on the pan 13 Zero the balance 14 Place the test mass on the pan and record the weight 15 All of the recorded weights must be within the tolerance of Table 4 1 4 8 CHAPTER 4 TESTING 4 2 4 RS232 Communication Test The RS232 Interface in the Explorer balance can have its performance monitored using an external printer or computer connected to the balance The RS232 Interface is a bi directional interface which enables the balance to communicate with a printer or computer equipped with an RS232 serial port An 5232 menuis inthe balance This menu enables various parameters such as Baud rate Data bits Stop Bits and Parity to be set in the balance 1 Connect the balance to a computer that can run Hyperterminal or a similiar terminal program Using either the
73. lorer Pro High Capacity Display PCB Assembly Explorer Display Module complete Explorer 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 19 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 9 Exploded View of Explorer High Capacity Display 5 20 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 10 Explorer High Capacity Display Parts List TABLE 5 9 EXPLORER HIGH CAPACITY DISPLAY PARTS LIST See Figure 5 9 KEY NO PART NO DESCRIPTION 1 11108481 Membrane Switch Explorer High Capacity 2 11136112 Cover Display Coated Explorer Voyager High Capacity 3 450111 010 Display Assembly Complete Explorer High Capacity NOTES 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 21 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 10 Exploded View of Explorer Pro Voyager Display 5 22 5 2 11 CHAPTER 5 DRAWINGS AND PARTS LISTS Explorer Pro Voyager Display Parts List TABLE 5 10 EXPLORER PRO VOYAGER DISPLAY PARTS LIST See Figure 5 10
74. m Ohaus Corporation 5 15 CHAPTER 5 DRAWINGS AND PARTS LISTS _ 7 M E SJ Pe avn arid 27 Y e v Boxed items are not available for sale NOTE Figure 5 7 Exploded View of Monoblock Load Cell for High Capacity Top Loader Balance 5 16 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 8 Monoblock High Capacity Top Loader Balance Parts List TABLE 5 7 MONOBLOCK HIGH CAPACITY TOP LOADER PARTS LIST See Figure 5 7 KEY NO PART NO DESCRIPTION 2 21100003 Position Sensor PCB High Capacity 4 00217400 Force Coil Lever Assembly Monoblock Explorer Voyager 5 21100229 Servomotor High Capacity NOTES 1 Inall cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 17 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 8 Exploded View of Explorer Display 5 18 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 9 Explorer Display Parts List KEY NO NOTES TABLE 5 8 EXPLORER DISPLAY PARTS LIST See Figure 5 8 PART NO 11108414 11136112 11108413 11108525 DESCRIPTION Switch Membrane Explorer Cover Display Coated Explorer Voyager Exp
75. mance 42 44 02 4 2 4 2 Center Load Test 4 22 4 8 5 1 Precision Top Loader Base Parts List 5 3 5 2 Analytical Base Parts LIST rre rnm eee 5 5 5 3 Precision Top Loader Base Parts List 2 5 7 5 4 Analytical Load Cell Parts 21 5 9 5 5 Precision Top Loader Monoblock Load Cell Parts List 5 11 5 6 High Capacity Top Loader Balance Parts List Sheet 1 5 13 5 6 High Capacity Top Loader Balance Parts List Sheet 2 5 15 5 7 Monoblock High Capacity Top Loader Parts List 5 17 5 8 Explorer Display Parts LIS uerit rer rien revers pei ursa 5 19 5 9 Explorer High Capacity Parts List eere 5 21 5 10 Explorer Pro Voyager Display Parts List 5 23 5 11 Voyager Explorer Pro High Capacity Parts List 5 25 TABLE OF CONTENTS Cont LIST OF ILLUSTRATIONS FIGURE NO TITLE PAGE NO 3 1 Analytical Sensor Board Adjustment Locations and Connections 3 3 3 2 Analytical Sensor Board Adjustment 3 4 3 3 Removing the Vertical coin 3 4 3 4 Installing Vertical
76. n Sensor Connections 3 18 Note The Position Sensor can be aligned by eye with the mounting holes If the Sensor Board has been replaced it may be necessary to adjust the vertical stop The vertical stop setting is the reference for the lever height horizontal position Preparation 1 The measuring cell remains in the balance housing 2 The ribbon cable from the Position Sensor assembly is plugged into the Main PC board the coil cable remains disconnected 3 Attach voltmeter DC range to pin 2 connector located at the top left corner of the Position Sensor assembly 4 Turn on the balance Setting vertical stop 1 Note down 1st voltage as soon asthe balance has been switched on here the lever is atthe bottom of the vertical stop 2 Determine 2nd voltage value by carefully rais ing lever with thumb and forefinger until it is at the top of the vertical stop Note down the value 3 Ifthe two voltage values and are notthe same or 1 5 2V difference max 0 1V the voltage mustbe set by adjusting the vertical stop 4 To adjust the vertical stop turn the vertical adjustment screw and repeat steps 1 and 2 until the readings are within specifications step 3 CHAPTER 3 REPAIR PROCEDURES 3 2 REPLACEMENT OF MAJOR COMPONENTS When using this section of the Service Manual you will find it necessary to refer to other sections References are made to the Exploded Views which are located and identif
77. o High Capacity Parts List 5 25 APPENDIX A EXPLORER EP LOADER A 1 Requirements Tor LO806l actore pee A 1 1 A 3 Installing EP Loader Software uci 1 R n EP Loader m D eee 1 A 5 Setup the Balance in Manufacturing Mode A 2 A 6 eeuu eui isie Siekda e T A 2 A Personality Data Label Entry icc A 3 A 8 Temperature Compensation TC Data Entry A 5 A 9 Downloading Personality Data and or TC Data into the Balance A 7 10 Saving Personality Data Data A 7 Opening a A 7 A12 Clear EP EOSUOF ee ee ee rene mee ner eter eee nee ne ne ore A 7 Confirm TC Download 7 APPENDIX EXPLORER PRO LOADER B 1 Requirements for EP 1 B 2 Installing EP Loader Software uie Ee oir B 1 R n EP Loader Sofware adde kie ihr ed enata B 1 B 4 Setup the Balance in Manufacturing Mode B 2 B 5 Connect the Balance TO a B 3 B 6 Temperature Compensation TC Data Entry
78. oader Balance 1 Place Lever in designated position check that the aluminum sleeves are properly positioned 2 Turn back height adjustment screw to original position 3 Insert Centering Pins in holes provided 4 Insert Lever fastener screws and tighten care fully Ensure that the Lever remains in the middle at the front 5 Mount Cover Plate align at centering pin g 6 Place Position Sensor on the Coil housing Figure 3 22 Force Coil Lever Installation 7 Insert the three screws and tighten with the nuts 8 Adjust Position Sensor as described in 3 1 27 3 1 25 Installing Monoblock and Assembling Position Sensor for High Capacity Top Loader Balance 1 Place Monoblock and formed chassis turned by 180 degrees on a flat and clean bench surface 2 Screw Monoblock to formed chassis Ensure top edge of formed chassis is flush with the top of the Monoblock See Figure 3 23 NOTE Tightening torque 4 0 Nm 3 Install Calibration Motor eccentric in top posi tion and Calibration Bracket During installa tion ensure that there is sufficient play be tween the eccentric of the Motor and the Cali bration Bracket Figure 3 23 Installation Monoblock and 4 Ensure that the Calibration Motor is the top Position Sensor position then insert Calibration weights Align Calibration Weight Holders parallel with the edge ofthe frame profile
79. osition Sensor Assembly for Monoblock Precision NR 3 10 3 1 15 Changing the Load Board Precision Top Loader Balance 3 10 3 1 16 Removing the Force Coil Lever from Monoblock in Precision Top Balance eT 3 11 3 1 17 Installing the Force Coil Lever Assembly in Monoblock for Precision Top Loader Co ito 3 12 3 1 18 Vertical Stop Adjustment for Monoblock in Precision Top Loader TABLE OF CONTENTS NR 3 13 TABLE OF CONTENTS Cont 3 1 19 Monoblock Load Cell Removal from High Capacity Top Loader Balant e MENTEM m 3 14 3 1 20 Calibration Motor Removal from High Capacity Top Loader Balance 3 14 3 1 21 Position Sensor Assembly Removal from Monoblock High Capacity Top Loader Balance 3 15 3 1 22 Installing the Position Sensor Assembly for Monoblock High Capacity High Capacity Top Loader 3 15 3 1 23 Removing the Force Coil Lever assembly from Monoblock in High Capacity Top Loader 3 15 3 1 24 Installing the Force Coil Lever Assembly in Monoblock in High Capacity Top Loader Balance 3 16 3 1 25 Installing Monoblock and Assembling Position Sensor for
80. out in this procedure and Figure 3 19 To remove the Monoblock Load Cell proceed as follows 1 With the balance turned OFF and unplugged remove the Pan 1 2 Remove four Pan Mounts 2 3 Remove four Cover Housing Screws 3 which secures the Housing Cover 4 to Base 19 4 Loosen the four Screws 17 which secures the Overload Protection 18 from Base 19 5 Carefully lift the Overload Protection up from the Weigh Assembly 20 and out of the Base 19 6 Disconnect the Coil Cable Connector 8 and the Cell Cable Connector 9 from the Main PCB 6 7 Remove the two Protective Plate Screws 5 holding the Main PCB 6 and Power Supply PCB 7 8 Carefully lift both PC boards upwards and disconnect Connector PCB Cable 10 from the Power Supply PCB 7 9 Remove the Cable Guide 26 from inside of the Base 19 10 Turn the Balance on it s side exposing the bottom and while holding the Weigh Assembly 20 inside of the Base 19 then remove the three Base Screws 12 from the Base 19 11 Remove the Weigh Assembly 20 from the Base 19 To remove the Monoblock 23 from the Weigh Assembly 20 continue as follows 12 Loosen the four Hex Head Screws 22 7 5 mm on the Weigh Assembly 20 These screws secure the Weigh Assembly to the Monoblock 23 13 Loosen the four Screws 24 which secures the U Block 25 to the Monoblock 23 14 Remove the Monoblock 23 3 1 20 Calibration Motor Removal from High Capacity To
81. owing URL fileshare ohaus com docushare a Click on Login b Login ServiceA Password aservice Both are case sensitive Click on the Xerox logo at the upper left d Click on Technical Support e Click on Service Notes f Click on Authorized Service Centers g Click on Explorer Pro Tools h Download all 5 files APPENDIX A EXPLORER EP LOADER 4 Run EP Loader Software 1 Click on EP Loader icon located in Start Programs EP Loader 2 The following screen will be displayed Loader X File Help Personality Data T TL 0 P DL D D D PL DL o2 C LI 0 L LL LP _ _ 1111 _ TC Data B D E L S Uu SS dE 2 F G H J D DCODE Data Type Download 0 Clear Comm Setup TC Data 1 2400 7 2 2 APPENDIX A EXPLORER EP LOADER 5 Setup the Balance in Manufacturing Mode 1 Remove power from the balance 2 Remove the pan It may be necessary to remove two screws holding the display assembly in place under the balance 3 Unclip the display module and ease it forward until the module is clear of the edge of the draft shield or the edge of the top balance cover 0 01g and O 1g resolution balances a If the balance is a Voyager install an Explorer display module b Ensure that the display PCB cannot short to the balance casing Remove the 2 screw
82. p Loader Balance Refer to Figure 5 6 in Chapter 5 for location of components called out in this procedure and Figure 3 19 To remove the calibration motor proceed as follows 1 Perform procedure as described in paragraph 3 1 19 and remove the Monoblock 23 and PC BOIS CAUTION Remove Monoblock carefully so that the two calibra tion weightspindles are not subjectto stress and never 5 touch anything during removal Careless removal could damage the calibration mechanism Hold the N Monoblock only right at the front or the back by the section fastening 2 Remove two screws 6 which secure the 6 Calibration Weight Holders 1 both sides and remove Calibration Weights Holders ES RI 3 Remove two Calibration weights 2 4 Remove the Motor Cable 38 See Figure 5 6 from Internal Calibration Motor Board 5 3 Cable may have to be redressed behind PC board when reassembling Figure 3 19 Calibration Motor Removal 3 14 CHAPTER 3 REPAIR PROCEDURES 3 1 20 Calibration Motor Removal from High Capacity Top Loader Balance Cont 5 Unscrew two fastener screws 3 of the Calibration Bracket 4 and carefully remove Bracket 6 Unscrew two fasteners screws 6 of the Calibration Motor and remove the Motor 3 1 21 Position Sensor Assembly Removal from Monoblock in High Capacity Top Loader Balance 1 Unscrew the three fastener screws a of t
83. p Loader Balances 210g to 81009 This adjustment requires that the balance be partially disassembled to gain access to the Load Cell for adjustments Refer to Figures 5 1 and 5 3 in Chapter 5 for location of components called out in this procedure See Figure 5 1 for steps 1 through 5 1 With the balance turned OFF and unplugged remove the Pan 1 2 applicable remove Wind Shield 2 3 Remove the four Corner Spacers 5 4 Remove two Screws 3 and Lockswitch Cover Seal 4 5 Remove the Cover 6 from the Base See Figure 5 3 for remaining steps 6 Remove the two Hex Screws 1 from the Subplatform 2 7 Remove the Subplatform 2 8 Remove two Screws 3 which secure Shield 4 in place 9 Remove Shield 4 from the balance 10 Remove two Screws 3 from the PC Board 11 11 Remove the Hex Screws 14 and Washers 25 the rear of the balance which secure the connectors on the PC Board 11 12 Disconnect the two cable connectors from the Load Cell going to J2 and J6 on the PC board as shown on Figure 5 3 The Load Cell 9 Use cable extenders for all connectors If internal calibration option is installed disconnect cable to J4 13 Carefully lift the PC Board 11 from the Base 18 there is a small cable from the Sensor Board which should also be disconnected from the PC Board not shown on Figure 5 3 The Load Cell 9 should now be exposed for adjustments CHAPTER 4 TESTING 4 2 2 Off Center Load Test Cont
84. placement Bulb in the Diffusion Panel 10 Solder the wires back to the Bulb and replace the End caps 11 Reassemble the Diffusion Panel back into the LCD Display Assembly 12 Continue with step 7 of paragraph 3 2 12 and reassemble the LCD Assembly and PCB Assembly 3 31 CHAPTER 3 REPAIR PROCEDURES LCD ASSEMBLY 7 PLASTIC PUSH IN FASTENER BRACKET DIFFUSER PANEL Figure 3 32 LCD Assembly Bulb Replacement 3 32 CHAPTER 4 TESTING 4 4 TESTING Before servicing the Explorer balance an operational test and various performance tests should be made to ascertain whether or not the balance meets specifications Turn the balance on and allow it warm up for at least one hour before performing these tests Make sure the test area is free from drafts and the surface that the balance rests on is level and vibration free The masses used for final calibration must meet or exceed ASTM Class 1 Tolerance 4 1 1 Operational Test 1 Connect a functioning Power Adapter to the balance power receptacle assembly located at the rear of the balance 2 Plug the Power Cord into a suitable power source 4 1 1 1 Segment Display Test 1 Turn the balance on With LFT OFF all segments are enabled and displayed breifly then the model number ofthe balance followed by a software revision number This is a segment display test Figure 4 1 is a full display test The display check countdown appears only in the first 60 St
85. played Turn the balance off unplug it plug it back in and perform the MFG and if necessary the MFG WT calibrations If the error persists recheck the personality data and edit it as necessary B 9 mang Personality Data and TC Data The Personality Data and TC Data should be saved at this time as a complete file press Ctrl S on the keyboard or select File gt Save in the menu of the EP Loader For a new Data file created a Save As pop up screen will appear to allow the Data file to be saved under the desired filename To save an existing Data file under a different filename press Ctrl A on the keyboard or select File gt Save As in the menu of the EP Loader B 10 Data files To open an existing Data file press Ctrl O on the keyboard or select File gt Open in the menu of the EP Loader To open a recently used Data file select the desired file under the File menu of the EP Loader B 11 Clear EP Loader l To clear data displayed in the EP Loader single click the Clear button B 12 Confirm TC Data Download 1 2 3 Open and conFig HyperTerminal With the balance still in manufacturing mode send the command XDTC to the balance The balance will respond with the TC data this response should agree with the TC data loaded B 9 APPENDIX B EXPLORER PRO EP LOADER 1 2 APPENDIX C PRODUCTION MODE CALIBRATION Remove power from the balance Remove the pan It may be necessar
86. port to Center Post with two 9 Toremove the Lower Flexure Arm from the Load PP Cell Assembly 51 removethe four Screws and MGS ROIS ONE aL 16 Install Bottom Mouting Plate with three screws 3 5 CHAPTER 3 REPAIR PROCEDURES 3 1 8 Removing the Lever and Coil 1 Remove the Hanger and shims 2 Remove the Vane from the Lever 3 Remove the 4 screws f holding the magnet holder 4 Remove the magnet holder CAUTION The magnet is made of brittle material care should be taken not to break off pieces 5 Note the original position of the vertical stop and turn it so that the ear on the Lever aligns with the slot 6 Remove the Lateral Stop g 7 Unsolder the contact strips at the Lever board 8 Remove the screws from the vertical guides pil low block bearings from the chassis And lift the Lever out Replacing the Vertical Flexures Pillow Block Bearings 1 Place the Lever on a flat surface and remove the bad Flexures 2 The round hole of the Flexure goes to the Lever side 3 Make sure the tops of the Flexures are flush with the top of the Lever 4 The distance from Flexure to Flexure is 46mm 1 81in Figure 3 7 Lever Removal Installation Figure 3 8 Vertical Guide Pillow Block Bearing Installation CHAPTER 3 REPAIR PROCEDURES 3 1 10 Replacing the Lever and Coil 1 Before replacing the Lever make sure the guides have been
87. pper or lower Flexure Arm Assembly or Vertical Flexure has been replaced it may be necessary to adjust the Position Sensor Refer to Figures 3 1 5 3 and 5 4 1 Remove the Analytical Load Cell from the balance see paragraph 3 1 1 2 Plug the Position Sensor PCB Assembly Cable into the Main PC Board 11 DO NOT CONNECT THE LOAD CELL CABLE 3 Apply power to the balance 4 Refer to Figure 3 1 and using a Digital Voltmeter set to measure dc voltage connect the DVM to the two terminal contacts located on the right hand side of the Sensor Board 51C See Figure 5 4 as follows Black or ground test lead to the negative terminal on the Sensor PC Board Red or positive test lead to the positive terminal on the Sensor PC Board ADJUSTMENT SCREWS SENSOR PC BOARD PRECISION RESISTOR CONNECTIONS B SENSOR CABLE CONNECTIONS Figure 3 1 Analytical Sensor Board Adjustment Locations and Connections 5 Push down on the Pan Support which is located on top of the Transducer brass fitting the reading on the DVM will be approximately 2 xxx volts dc 6 Pull up on the Pan Support the reading on the DVM will be approximately 2 xxx volts dc 7 Adjust up stop for equal swing between readings in steps 5 and 6 See Figure 5 4 for location of stop screw 8 Reassemble the balance follow the procedure in paragraph 3 1 2 CHAPTER 3 REPAIR PROCEDURES 3 1 4 Analytical Load Cell Position Sensor Adjustment Without T
88. r Precision Top Loader 5 10 5 6 Overall Exploded of High Capacity Top Loader Balance Sht 1 5 12 5 6 Overall Exploded of High Capacity Top Loader Balance Sht 2 5 14 5 7 Exploded View of Monoblock Load Cell for High Capacity Top Belo dini 9 T EET 5 16 5 8 Exploded View of Explorer Display 5 18 5 9 Exploded View of Explorer High Capacity Display 5 20 5 10 Exploded View of Explorer Pro Voyager Display 5 22 5 11 Exploded View of Voyager Explorer Pro High Capacity Display 5 24 A 1 zi PME m A 3 A 2 Personalty T A 3 EE 5 1 xb oer E 2 2 T B 3 B 3 rm 6 vi CHAPTER 1 INTRODUCTION 1 1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Explorer Explorer Pro and Voyager balances There are three basic configurations of balances Analytical Precision Top Loader and High Capacity Top Loader The High Capacity Top Loader balances are rated from 12 000 grams to 32 000 grams capacity and contain different components than the lower capacity Precision Top Loader balances The procedures in this manual assume the technician performing them has a working knowledge of the use of standard
89. r View of the Display PCB Assembly 3 2 9 Membrane Switch Replacement 1 Follow the procedure in paragraph 3 2 6 or 3 2 7 and remove the display module from the balance 2 Remove the membrane switch ribbon cable from the PC Board see Figure 3 28 3 On the front of the display carefully remove the existing membrane switch from the display panel Lift the membrane switch off starting at one corner 4 Remove all adhesive residue from the display panel 5 At the back of the new membrane switch remove the protective covering from the window area first 6 Remove the adhesive backing from the membrane switch Be very careful atthis point You wantto make sure the membrane switch is properly placed as you cannot remove it to reposition it on the display panel 3 27 CHAPTER 3 REPAIR PROCEDURES 3 2 9 Membrane Switch Replacement Cont 7 Insert the flat cable from the membrane switch and ground cable through the holes on the display panel See Figure 3 29 CAUTION BE CAREFUL NOT TO BEND THE RIBBON CABLE SHARPLY IF IT IS CREASED USE ANOTHER MEMBRANE SWITCH Figure 3 29 Membrane Switch Cable Routing 8 Carefully align the membrane switch top edge with the top edge of the display panel 9 Using a rolling motion press the membrane switch into position Smooth the membrane switch down to make sure it is securly fastened 10 Replace the membrane switch ribbon cable see Figure 3 28 3 2 10 Replacing the Display 1 Se
90. s replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 5 CHAPTER 5 DRAWINGS AND PARTS LISTS SWITCH CABLE TO DISPLAY MODULE POSITION Boxed items are not available for sale Figure 5 3 Exploded View of Precision Top Loader Base Assembly 5 6 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 3 Precision Top Loader Base Parts List KEY NO 2 20 21 NOTES TABLE 5 3 PRECISION TOP LOADER BASE PARTS LIST See Figure 5 3 PART NO 11108720 11108412 11108708 11108712 498000 014 400103 030 400103 020 400103 010 76580 21 400102 010 11108101 11136101 11108104 00215053 00380035 3263 00 DESCRIPTION Pan Support 6 8 x 6 8 amp 8 x 8 Explorer Voyager Explorer Pro Cable Display Explorer Voyager Explorer Pro Calibration Mechanism Explorer Voyager Explorer Pro Main PCB Assembly Explorer Voyager Explorer Pro IC PSD U11 Explorer Voyager Explorer Pro Calibration Weight 6109 800g 21009 41009 4100g 1000g 61009 8100g Explorer
91. s securing the draft shield or top balance cover in place 4 b Remove fhe plastic pan support clips if fitted 6 Remove the draft shield or top balance cover 7 Install the manufacturing link in the position shown in Figure 1 a Install the link by pushing down on the top and then rotating it 90 to lock it in position b If a manufacturing link is not available remove the RF shield and locate the hole through the printed circuit board that was under the manufacturing link access hole Short the two pads just to the front of this hole 8 Apply power to the balance 9 The balance will come on by itself and display MFG before the normal turn on cycle A 6 Connect the Balance to a PC 1 Connect the RS232 interface cable between the balance and the PC Note that for a 9 pin to 9 pin cable ensure the connector marked BAL is connected to the balance 2 Check communication between the balance and the PC a In the EP Loader single click on the Comm Setup button The following pop up screen will be displayed Communications Setup Port Speed Parity Data COM 1 300 7 C COM2 C 1200 LAS 2400 C Even C COM 3 4800 C COM4 9600 f Odd 2 Comm Test b Modify the communication parameters of the EP Loader to match the balance then single click the Comm Test button A pop up screen will be displayed to indicate that the
92. t c Carbolite c Browse Download Comm sen Close APPENDIX D REPLACING BOTTOM DISPLAY BOARD D 2 Explorer Pro Voyager and Voyager Pro Display Flash Instructions Cont Ed Communications Setup Part Speed COM 1 300 2400 C COM 3 4800 9600 Cancel Test Comm 10 Select the balance you are downloading to then click on browse and select the location of the bank files to be installed C COM 4 11 Click on the download button to start the download process A progress bar will be shown on your computer and a message on the balance display showing the progress of the download 12 When complete Remove and reapply power to the balance The balance will then display Verify Flash Bank Checksum across the top of the display The following lines will show each bank followed by OK At the bottom of the display it will show KEY This allows you to test the keys individually The display will be as shown in the table below 13 The procedure is complete Remove power from the balance and remove the short across the two pins SHORT THESE PINS APPENDIX D REPLACING BOTTOM DISPLAY BOARD 802 5 09 8 5 PN 80250985 SERVICE MANUAL EXPLORER EXPLORER PRO AND VOYAGER BALANCES
93. t or exceed ASTM Class 1 Tolerance NOTE The balance must pass the Off Center Load test before the Linearity Test is performed This test is used to determine the linearity of the balance throughout its operating range Table 4 2 lists the suggested masses to be used for checking linearity on each balance model TABLE 4 2 CENTER LOAD TEST MASSES ANALYTICAL PRECISION TOP LOADER CAPACITY 62g 1109 210g 210 100g 210g 4100 410 100g 6109 21000 4100g 4100 10000 41000 61004 81000 Ref Mass 1g 1g 1g 10 10 1g 1g 1g 1g 1g 1g 1g 1g 1g 1g Load 1 10g 10g 10g 109 109 10g 10g 10g 10g 10g 1009 10000 1000g 10g 1000g 500g 1000g Load 2 20g 25g 100g 209 209 50g 100g 50g 50g 2000 500g 10009 10009 1009 10000 20000 40009 Load 3 40g 50g 1500 30g 30g 1000 2000 200g 75g 400g 10009 2000g 20000 2000 20000 40000 60000 Load 4 50g 100g 2000 40g 40g 150g 400g 400g 100g 6000 2000g 4000g 4000g 500g 4000g 6000g 8000g HIGH CAPACITY TOP LOADER CAPACITY 12000g 22000g 32000g Ref Mass 1g 1g 19 Load 1 2000g 4000g 6000g Load 2 4000g 8000g 12000g Load 3 8000g 16000g 22000g Load 4 12000g 22000g 32000g A 1gcalibration mass is recommended for the reference mass All masses are nominal values HOWEVER BE CERTAIN TO USE THE SAME REFERENCE MASS THROUGHOUT THE PROCEDURE 1 Perform a linearity ca
94. there is a small cable from the Sensor Board which should also be disconnected from the PC Board not shown on Figure 5 3 3 19 CHAPTER 3 REPAIR PROCEDURES 3 2 1 Analytical Balances Main Printed Circuit Board PCB Cont 11 12 13 14 15 16 17 18 19 20 21 22 CAUTION WHEN HANDLING THE P C BOARD HANDLE BY EDGES ONLY DO NOT TOUCH FOIL SIDE OF BOARD STATIC DISCHARGE MAY DAMAGESOME COMPONENTS Switch the following components from the defective Main PC Board to the replacement 05 EEPROM U10 IC U11 PSD Install the replacement PC Board Connect the two cable connectors from the Analytical Load Cell 9 to the Main PC Board edge connectors J3 J6 and the Sensor Cable The Sensor Board Cable is located atthe rear of the balance and may interfere with the operation of the balance if it is not positioned away from the Load Cell Dress the cables and make sure that the cables do not interfere with the Load Cell If internal calibration option is installed connect cable to J4 Reinstall the PC Board and secure with two screws 3 Install the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors on the PC Board 11 Install the Shield 4 back on the balance and secure with two Screws 3 Figure 5 3 Install the Draft Shield and secure with two Screws 2 making sure Lockswitch Cover Seal 1 Figure 5 2 is in place Replace the Cover Plate 6 and
95. tion Sensor Assembly Explorer Voyager 51D 12106733 Guide Assembly Bottom Explorer Voyager 51E 12106731 Lever Ratio Beam with coil Older Explorer Voyager Analytical 51F 12106749 Contact Strips Kit of 10 Explorer Voyager Analytical 55 12106750 Ratio Beam Flexure Explorer Voyager Kit of 6 NOTES 1 cases where a part is replaced the balance shall be thoroughly checked after the replacement is made The balance must meet the parameters of all applicable specifications in this manual 2 Ohausreplacement parts warranty only applies to parts purchased from Ohaus Corporation 5 8 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 5 Exploded View of Monoblock Load Cell for Precision Top Loader 5 10 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 5 Precision Top Loader Monoblock Load Cell Parts List TABLE 5 5 PRECISION TOP LOADER MONOBLOCK LOAD CELL PARTS LIST See figure 5 5 KEY NO 1 NOTES PART NO 00217401 00217400 00225615 81951 81881 DESCRIPTION Position Sensor Assembly Monoblock Explorer Voyager Explorer Pro Hi Capacity Force Coil Lever Assembly Monoblock Explorer Voyager Explorer Pro Hi Capacity Board Load Cell Monoblock Explorer Voyager Explorer Pro Hi Capacity Reference Resistor 1 5k Explorer Voyager Explorer Pro Reference Resistor 760 ohms Explorer Voyager Explorer Pro
96. utton 13 Confirm TC Data Download 1 2 3 Open and configure HyperTerminal to match the balance communication parameters With the balance still in manufacturing mode send the command XDTC to the balance The balance will respond with the TC data this response should agree with the TC data loaded A 8 APPENDIX B EXPLORER PRO EP LOADER 1 Requirements for EP Loader e Pentium 90MHz or higher microprocessor e VGA 640x480 or higher resolution screen Microsoft Windows NT 4 0 or later or Microsoft Windows 95 or later e Minimum 24 MB RAM for Windows 95 98 32 MB for Windows NT Minimum 10 MB free space CD ROM e 25232 cable Ohaus part number 501 7 09 9 or 5017 02 25 pin e HyperTerminal or another communications program to verify the data e Explorer display B 2 Installing EP Loader Software 1 2 3 4 Insert the EP Loader CD into the CD ROM Run the setup executable found on the EP Loader CD to start the installation wizard Follow the instructions in the installation wizard If the CD is not available the software can be downloaded at the following URL HTTP fileshare ohaus com docushare a Click on Login b Login ServiceA Password aservice Both are case sensitive Click on the Xerox logo at the upper left d Click on Technical Support e Click on Service Notes f Click on Authorized Service Centers g Click on Explorer Pro Tools h Download all 5 files B 1
97. voc acr 17 7 AB2F E3 amp D 70 forse 7403 4 4 0180 8 06 92 1 46 6957 0 38 475 4 5 83 fecia ipae 2957 1250 408 4880 B1E7 pp32 92 1652 2957 oras 408 4 81 1 TC Data B E D E 1 56531 0 20 3 657989 11 19 784341e 01 1 395911 13 3 568205 04 F G H J 2 072502e 05 6 462143 06 1 663802 20 3 571619 11 19 786206e 01 DCODE 65535 AutaCal Data o3E 4 Fa2F C52 2990 070 42CF 1 5F 2 E3AD B70F OF 38 7403 4FB4 01 BO Data Type v Personality Data TC Data Clear Comm Setup 4 Confirm that the Balance Personality Data from the label matches the data that was inputted into the Personality Data section of the EP Loader If not edit the data APPENDIX B EXPLORER PRO EP LOADER B 8 aii due Personality Data and or TC Data Into the Balance 2 In the Data Type box of the EP Loader there are two check fields to allow selections of Personality Data and or TC Data to be downloaded into the balance If both types of data need to be downloaded it can be done at one time To initiate download process single click the Download button on the EP Loader 3 1 In the lower right hand corner of the EP Loader a status bar will appear to display the progress of the download After the data is downloaded an error message may be dis
98. wn Adjustment paragraph 3 1 3 or 3 1 4 3 2 3 Precision Top Loader Balances Main Printed Circuit Board PCB The circuitry used on the Main is very complex Troubleshooting the Main PCB requires an Oscilloscope DVM hand tools and the services of a trained electronics technician In an effort to keep service costs down it is suggested that if the Main PCB is suspected of being faulty it should be replaced to verify the defect In the case of common power supply problems conventional troubleshooting techniques should be employed Refer to Figures 5 1 and 5 3 in Chapter 5 for location of components called out in this procedure See Figure 5 1 for steps 1 through 5 1 With the balance turned OFF and unplugged remove the Pan 1 2 Remove Wind Shield 2 3 Remove the four Corner Spacers 5 4 Remove two Screws 3 and Lockswitch Cover Seal 4 5 Remove the Cover 6 from the Base 3 21 CHAPTER 3 REPAIR PROCEDURES 3 2 3 Precision Top Loader Balances Main Printed Circuit Board PCB Cont See Figure 5 3 for remaining steps 6 Remove the two Hex Screws 1 from the Subplatform 2 7 Remove the Subplatform 2 8 Remove two Screws 3 which secure Shield 4 in place 9 Remove Shield 4 from the balance 10 Remove the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors on the PC Board 11 11 Disconnect the two cable connectors from the Load Cell going to J2 and J6 on the
99. x in the Data Type box see below v EP Loader OF XI File Help Personality D ata sci fos Fo Tics2 seo oroc ize7 cre ABF Exp Bor orae 7403 area esr ica 6957 Oe rms acer cess facia rape Dae 2957 iso 08 4560 BIET 032 Far hcz 2957 oras ane abe TC Data C D E Lo D o F G H J DCODE Data Type Download Iv Personality Data Clear Comm Setup TCData COM1 2400 n 7 2 2 APPENDIX A EXPLORER EP LOADER 8 Temperature Compensation TC Data Entry 1 Locate the TC Data Label on the balance For the location see Figure A 1 There are 2 major styles of label currently in use please refer to Figure A 3 453697E 06 9 796 1 8 Figure TC Data 2 Identify the values labeled in the diagram as A to J If the balance does not have internal calibration there will only be values A to G Then input into the TC Data location of the EP Loader accordingly The Loader will look like the picture below KA EP Loader OF X File Help Personality Data T I f 0 T _ 1 TC Data B D E 269961 20 3 713840e 11 8 802111 01 8 161547e 14 3 680244e 04 DCODE 5555 Data Type Download Personality Data Clear Comm Setup
100. y to remove two screws holding the display assembly in place under the balance Unclip the display module and ease it forward until the module is clear of the edge of the draft shield or the edge of the top balance cover 0 01g and O 1g resolution balances If the balance is a Voyager or Explorer Pro install an Explorer display module Ensure that the display PCB cannot short to the balance casing Remove the 2 screws securing the draft shield or top balance cover in place Remove the plastic pan support clips if required Remove the draft shield or top balance cover Install the manufacturing link in the position shown in refer to fig in eploader Instructions Install the link by pushing down on the top and then rotating it 90 to lock it in position If a manufacturing link is not available remove the RF shield and locate the hole through the printed circuit board that was under the manufacturing link access hole Short the two pads just to the front of this hole Insure that the pan pan support and any hardware that makes up the dead load is on the balance The turn on zero will be written to memory during the calibration Apply power to the balance The balance will come on by itself and display MFG before the normal turn on cycle This indicates the balance is in manufacturing mode Manufacturing Calibration MFg Procedure if D I Press and release Setup The balance will display MFGTEST Press and release th
101. yles of Monoblock load cells This section of the manual contains detailed disassembly and assembly procedures on each of three types of load cells The removal of the load cell should only be attempted when it is determined that it requires parts replacement 3 1 1 Analytical Load Cell 9 Removal Refer to Figures 5 2 and 5 3 in Chapter 5 for location of components called out in this procedure To remove the Analytical Load Cell proceed as follows See Figure 5 2 for steps 1 through 4 1 With the balance turned OFF and unplugged open the Draft Shield door and remove the Pan 5 2 Remove Cover Plate 6 3 Inside of the Draft shield remove two Screws 2 and Lockswitch Cover Seal 1 4 Carefully lift the Draft Shield from the balance Base and set aside See Figure 5 3 for remaining steps 5 Remove two Screws 3 which secure Shield 4 in place 6 Remove Shield 4 from the balance 7 Remove the two Screws 3 on top of the PC Board 11 8 Remove the Hex Screws 14 and Washers 25 at the rear of the balance which secure the connectors the PC Board 11 9 Disconnect the two cable connectors from the Load Cell going to J3 and J6 on the PC board as shown on Figure 5 3 The Load Cell 9 If internal calibration option is installed disconnect cable to J4 10 Carefully lift the PC Board 11 from the Base 18 there is a small cable from the Sensor Board which should also be disconnected from the PC Board not shown on Figure 5

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