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1. Model NV311M NV3100M Capacity 310 3100 Repeatability g 0 1 1 Linearity 0 30 1 t1 OCL g 1 MPE 1 MPE Zero Drift 1e 5 C 1e 5 C Span Sensitivity d C 1 MPE 1 MPE NV NTEP MC Type Approved Model NV311N NV3100N Capacity 310 3100 Repeatability g 0 1 0 1 Linearity 0 30 1 30 1 0 1 MPE 1 Zero Drift 1e 5 1e 5 C Span Sensitivity 1 MPE 1 MPE NVL non Approved Model NVL511 NVL1101 NVL2101 NVL5101 NVL10000 NVL20000 Capacity g 510 1100 2100 5100 10000 20000 Repeatability g 0 2 0 2 0 2 1 2 2 Linearity 0 30 2 30 2 30 2 t1 2 2 OCL g 0 3 0 3 0 3 1 5 3 3 Zero Drift g C 0 2 0 2 0 3 1 2 2 Span Sensitivity d C 0 1 0 1 0 1 0 5 1 1 NVL CMC Approved Model NVL511B NVL1101B NVL2101B NVL5101B NVL10000B NVL20000B Capacity g 510 1100 2100 5100 10000 20000 Repeatability g 0 2 0 2 0 2 2 2 2 Linearity 0 30 2 30 2 30 2 2 2 2 OCL g 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE Zero Drift 1e 5 C 1e 5 C 1e 5 C 1e 5 C 1 5 1e 5 C Span Sensitivity 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE Navigator Series Service Manual 3 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED NVT non Approved
2. Model NVT1601 NVT3201 NVT6401 NVT10000 NVT16000 Capacity g 1600 3200 6400 10000 16000 Repeatability g 0 2 0 4 1 1 2 Linearity g 0 2 0 4 1 1 2 OCL g 0 3 0 6 1 5 1 5 3 Zero Drift g C 0 3 0 4 1 1 2 Span Sensitivity g C 0 1 0 2 0 5 0 5 1 NVT CMC Approved Model NVT1601B NVT3201B NVT6400B NVT10000B NVT16000B Capacity g 1600 3200 6400 10000 16000 Repeatability g 40 2 30 4 2 2 2 Linearity g 0 2 0 4 2 2 2 OCL g 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE Zero Drift 1e 5 C 1e 5 C 1e 5 C 5 1e 5 C Span Sensitivity 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE NVT EC OIML Type Approved Model NVT1601M NVT3200M NVT6400M NVT16000M Capacity g 1600 3200 6400 16000 Repeatability g 40 5 t1 2 5 Linearity 0 0 5 1 2 5 OCL g 1 MPE 1 MPE 1 MPE 1 MPE Zero Drift 1e 5 C 1e 5 C 1e 5 C 1e 5 C Span Sensitivity 1 MPE 1 MPE 1 MPE 1 MPE NVT NTEP MC Type Approved Model NVT1601N NVT3200N NVT6400N NVT16000N Capacity g 30 5 1 2 5 Repeatability g 0 5 1 2 5 Linearity 0 05 1 2 5 OCL g 1 MPE 1 MPE 1 MPE 1 MPE Zero Drift 1e 5 C 1e 5 C le 5C 1e 5 C Span Sensitivity 1 MPE 1 MPE 1 MPE 1 MPE Ohaus Corporation www ohaus com 4 Navigator Series Service Manual CHAPTER 1 GETTING STARTED 1 5 CAPACITY AND READABILITY The capacity and readability of the available units of measure for the Ohaus Nav
3. Do not leave a mass on the scale when the scale is not in use Allow time for the scale to stabilize after moving it from an area which is at a different temperature than the area where it is to be operated Allow one hour for each 5 F 2 7 temperature change before using the scale After temperature stabilization allow an additional 20 minutes after turning the scale on for the scale electronics to stabilize Preventive Maintenance Checklist The scale should be inspected and checked regularly as follows 1 Remove the Pan and Sub Pan to inspect and clean the area beneath the Pan 2 Clean the outside of the scale using a damp cloth with warm water CAUTION DO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE SCALE S FINISH 3 Checkthe Power Cord for broken or damaged insulation If using batteries and the scale malfunctions first replace the batteries to see if this resolves the problem To isolate a problem with the rechargeable battery option kit the scale can be converted back to standard alkaline batteries see Rechargeable Battery Option User Manual 5 Make a visual inspection for faulty connectors wiring and loose hardware 3 2 OPENING THE SCALE Opening the Navigator scale varies slightly according to the specific model as detailed below Use these procedures in order to replace the Load Cell the Printed Circuit Board or other components Opening Navig
4. Press Yes to confirm a span calibration B 4 SPAN CALIBRATION Span calibration from the service menu allows you to set a new zero and maximum setting This 15 distinct from user level span calibration which allows a user to adjust the zero and maximum setting within the range established by the service menu span setting Span calibration automatically follows linear calibration To start from the Service Menu press and hold Zero On and Tare together As the scale powers up rAPIP appears Press No to bypass Ramp when L appears press No SPAN appears Press Yes The display shows while the scale acquires the zero point weight value The specified span weight flashes Place the indicated weight in the center of the Pan Pressing Yes after placing the prompted weight accepts the span weight shown on the display The display then shows while the scale acquires the span point Navigator Series Service Manual 39 Ohaus Corporation www ohaus com APPENDIX B THE SERVICE MENU weight data After the span value is acquired the display shows done for 2 seconds and advances to To exit the Service Menu press No until End appears Then press Yes NOTE If calibration fails ensure that the test area is free from drafts and the surface the scale rests on is level and free of vibrations Then try to calibrate again If it continues to fail there may be an internal problem To resolve internal problem
5. OHAUS SERVICE MANUAL Navigator Series Scales TABLE OF CONTENTS Page No 1 GETTING STARTED 1 1 1 INTRODUCTION 1 1 2 SERVICE FACILITIES 1 1 3 TOOLS AND TEST EQUIPMENT REQUIRED 2 1 4 SPECIFICATIONS 2 1 5 CAPACITY AND READABILITY 5 1 6 SCALE OPERATION 10 1 6 1 Overview of the Controls 10 1 6 2 Overview of the Display Indicators 12 1 6 3 Power On 12 1 6 4 Power Off 13 1 6 5 Menu Setup 13 1 7 LEGAL FOR TRADE LFT 13 1 8 MENU STRUCTURE 14 1 8 1 User Menu 14 1 8 2 Service Menu 14 2 DIAGNOSTIC GUIDE 16 2 1 TROUBLESHOOTING 16 2 1 1 General procedures for Troubleshooting 16 2 2 DIAGNOSTIC GUIDE 16 3 MAINTENANCE PROCEDURES 19 3 1 PREVENTIVE MAINTENANCE 19 3 2 OPENING THE SCALE 19 3 3 REPLACING THE LOAD CELL 21 3 4 REPLACING THE PRINTED CIRCUIT BOARD AND DISPLAY 23 3 5 REPLACING THE FUNCTION LABEL 23 3 6 DOWN STOP ADJUSTMENT 23 4 TESTING 25 4 1 TEST MASSES REQUIRED 25 4 2 OPERATIONAL TEST 26 4 3 SEGMENT DISPLAY TEST 26 4 4 LOAD CELL TEST USING RAMP 26 4 5 PERFORMANCE TESTS 27 4 5 1 Precision Test 27 4 5 2 Repeatability Test 28 4 5 3 Linearity Test 30 4 5 4 Off Center Load Test 31 4 5 5 Adjusting Off Center Load 31 5 PARTS LISTS amp DIAGRAMS 33 5 1 HOUSING amp INTERNAL PARTS 34 APPENDIX A STANDARD CALIBRATION 36 A 1 SPAN CALIBRATION 36 A 2 LINEARITY CALIBRATION 37 APPENDIX B SERVICE MENU 38 B 1 ENTERING THE SERVICE MENU 38 B 2 RAMP 38 B 3 LINEAR CALIBRATION 38 Ohaus Corporation www ohaus com i Navigator
6. 10660 minutes 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 54 41 55 52 22 22 21 21 20 20 19 19 18 18 17 55 52 57 04 23 22 22 21 21 20 20 19 19 18 18 57 04 58 17 23 23 22 22 21 21 20 20 19 19 18 58 17 59 32 24 23 23 22 22 21 21 20 20 19 19 59 32 60 49 24 24 23 23 22 22 21 21 20 20 19 60 49 62 09 25 24 24 23 23 22 22 21 21 20 20 62 09 63 30 25 25 24 24 23 23 22 22 21 21 20 63 30 64 55 26 25 25 24 24 23 23 22 22 21 21 64 55 66 24 26 26 25 25 24 24 23 23 22 22 21 66 24 67 57 27 26 26 25 25 24 24 23 23 22 22 67 57 69 35 27 27 26 26 25 25 24 24 23 23 22 69 35 71 21 28 27 27 26 26 25 25 24 24 23 23 71 21 73716 28 28 27 27 26 26 25 25 24 24 23 73 16 75224 29 28 28 27 27 26 26 25 25 24 24 75 24 77 52 29 29 28 28 27 27 26 26 25 25 24 77 52 80 56 30 29 29 28 28 27 27 26 26 25 25 80 56 85 45 30 30 29 29 28 28 27 27 26 26 25 85 45 90 00 31 30 30 29 29 28 28 27 27 26 26 Navigator Service Manual 49 Ohaus Corporation www ohaus com OHRUS Ohaus Corporation 7 Campus Drive Suite 310 Parsippany NJ 07054 Tel 973 377 9000 With offices worldwide www ohaus com 8 3 0 5 2 2 1 0 P N 83032210 B O 2011 Ohaus Corporation all rights reserved TM Registered trademark of Ohaus Corporation The information contained in this manual is believed to be accurate at the
7. Figure 1 4 Menu Lock Switch Locked Unlocked After the Menu Lock setting has been turned off the scale must be inspected in accordance with local weights and measures regulations before it can be used in LFT mode again Local authorities may secure the switch using paper seals wire seals or plastic ties Note M and M models When the Menu Lock switch is set to on certain menu items will be forced to the required setting and the required menus will be locked LFT SETUP PROCEDURE 1 Set the Geographical Adjustment Factor GEO according to the current location See Appendix D Possible values are from 1 to 31 The setting is in the Service Menu press ZERO and simultaneously during power on hold until Ramp is seen Press No three times until GEO appears then press Yes Then continuously press No until the desired Navigator Series Service Manual 13 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED number appears Press Yes then No until END appears Press Yes to return to weighing mode This allows the scale to be calibrated at the current location with the local GEO factor Later the GEO factor can be changed to match the intended destination so that the correct deviations will be implemented 2 Access the Mode menu Press and hold No until PN o d E appears Press Yes to enter the displayed menu or No to advance to the next menu etc Set the following Modes as per local LFT requir
8. Fill in the worksheet Table 4 3 with the ten 10 readings TABLE 4 3 REPEATABILITY WORKSHEET n Reading Delta Reading Mean Delta x Delta 1 2 3 4 5 6 7 8 9 10 n number of Reading Mean Sum of readings 10 Delta Reading Mean Standard Deviation Square Root of sum of Delta x Delta 9 5 Add the ten readings and divide the total by 10 to find the Mean average Mean Reading 1 Reading 2 Reading 3 Reading 4 Reading 5 Reading 6 Reading 7 Reading 8 Reading 9 Reading 10 10 Mean 6 Calculate the Delta for each reading and record in the work sheet Delta Reading Mean Calculate the Delta x Delta for each reading and record in worksheet 8 Add the ten Delta x Delta values and divide by 9 9 Calculate the Standard Deviation by applying the square root of the result from step 8 Standard Deviation Note If the balance does not meet specifications move it to a suitable location ensure that it is level and try again If it still does not meet specifications perform a service calibration and try again See Appendix B for Service Calibration Navigator Series Service Manual 29 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 5 3 Linearity Test This test is used to determine the linearity of the unit throughout its operating range The masses used to perform this test can be utility masses NOTE The sc
9. which should match the specification for each model listed in Tolerance Table 4 2 1 Power on the balance The reading on the display should be 00 2 Select a mass weighing near the maximum capacity of the balance and place it on the center of the Pan Observe and record the reading 3 Remove the mass The reading should return to 00 the precision tolerance in Table 4 2 Navigator Series Service Manual 27 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 Repeat this test three times The readings should be within tolerances If so the balance passes the Precision Test 5 If the deviation for any set of readings using the same mass placed on the center of the Pan is greater than the tolerance listed in Table 4 2 the balance does not meet the precision specification Inspect and correct the following areas Check for mechanical obstructions Any foreign object touching any part of the moving assemblies will cause a balance to fail the Precision Test Inspect and correct as necessary Ifthe scale does not meet specifications move it to a suitable location ensure that it is level and try again If it still does not meet specifications perform a service calibration and try again See Appendix B for Service Calibration Ifthe scale does not pass this test the Load Cell may need to be replaced 4 5 2 Repeatability Test The repeatability specification is defined as the Standard Deviation value derived
10. 35 31 13 13 12 12 11 11 10 10 9 9 8 35 31 36 41 14 13 13 12 12 11 11 10 10 9 9 36 41 37750 14 14 13 13 12 12 11 11 10 10 9 37 50 38258 15 14 14 13 13 12 12 11 11 10 10 38 58 40 05 15 15 14 14 13 13 12 12 11 11 10 40 05 41 12 16 15 15 14 14 13 13 12 12 11 11 41 12 42 19 16 16 15 15 14 14 13 13 12 12 11 42 19 43 26 17 16 16 15 15 14 14 13 13 12 12 43 26 44 32 17 17 16 16 15 15 14 14 13 13 12 44 32 45 38 18 17 17 16 16 15 15 14 14 13 13 45 38 46 45 18 18 17 17 16 16 15 15 14 14 13 46 45 47 51 19 18 18 17 17 16 16 15 15 14 14 47 51 48 58 19 19 18 18 17 17 16 16 15 15 14 48 58 50 06 20 19 19 18 18 17 17 16 16 15 15 50 06 51 13 20 20 19 19 18 18 17 17 16 16 15 51 13 52 22 21 20 20 19 19 18 18 17 17 16 16 52 22 53 31 21 21 20 20 19 19 18 18 17 17 16 53 31 54 41 22 21 21 20 20 19 19 18 18 17 17 A 00 Ohaus Corporation www ohaus com Navigator Service Manual APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES TABLE D 1 GEOGRAPHICAL ADJUSTMENT VALUES Elevation above sea level in meters Geographical 0 325 650 975 1800 1625 1950 2275 2600 2925 3250 latitude away 325 650 975 1300 1625 1950 2275 2600 2925 3250 3575 from the equator North Elevation above sea level in feet or South in degrees and 0 1060 2130 3200 4260 5330 6400 7460 8530 9600
11. 94 31 180 04 351 5 437 25 0 001 x 0 01 x 0 01 x 0 01 x 0 02 x 0 05 Navigator Series Service Manual 5 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 12 860 31 23 67 36 128 6 251 08 312 30 x 0 001 x 0 01 x 0 01 x 0 01 x 0 02 x 0 05 NV Models EC OIML Type Approved Units NV311M NV3100M 2550 15500 0 5 x5 311 3100 0 1 1 3 1 NA 0 001 NV Models NTEP MC Type Approved Units NV311N NV3100N 2550 15500 0 5 x5 311 3100 0 1 1 3 1 NA x 0 001 NA 6 835 x 0 005 10 935 109 35 x 0 005 x 0 05 9 965 99 65 x 0 005 x 0 05 gr 4784 47840 grn x2 x 20 199 3 1993 0 1 1 Ohaus Corporation www ohaus com Navigator Series Service Manual CHAPTER 1 GETTING STARTED NVL Models Non Approved NVL511 NVL1101 NVL2101 NVL5101 NVL10000 NVL20000 2550 5500 10500 25500 50000 100000 x 0 5 x 0 5 x 0 5 x5 x5 x5 511 1100 2100 5100 10000 20000 x 0 1 x 0 1 x 0 1 x 0 5 x 0 5 1 NA 1 1 2 1 5 1 10 20 x0 0001 x 0 0001 x 0 0005 x 0 0005 x 0 001 1 1245 2 425 4 6295 11 244 22 046 44 09 0 0005 x 0 0005 x 0 0005 x 0 002 x 0 002 x 0 005 02 17 990 38 8 74 075 179 9 352 74 705 5 dec 0 005 x0 005 x0 005 x 0 02 x 0 02 x 0 05 02 1778 3894 74 17978 352 705 frac vs Ve Ve Y Ve Ve Ib oz 110 1 9902 2lb 6 80z 4lb 10 070z 11lb 3 90z 221b 0 7402 4410 1 502 dec 0 0102 0 0102 0 0102 0 0207 0 0207 0 0502 0
12. Allow one hour for each 5 F 2 7 C temperature change before using the scale After temperature stabilization allow an additional 20 minutes after turning the scale on for the scale electronics to stabilize When the scale is turned on the last mode and unit will be active 1 6 4 Power Off To turn the scale OFF press and hold Zero D until the display indicates OFF then release 1 6 5 Menu Setup Programmable features of the Navigator scales are contained in menus which are accessed through the Display Panel s control switches The Menu Structure is described in Section 1 8 For more detail on using the menus see the Instruction Manual Note The Menu Lock switch limits changes to the Cal Setup Mode and Unit menus The switch in type approved models may set some balance settings as required by the approval agency To gain access to these submenus see the next section 1 7 LEGAL FOR TRADE LFT When the scale is set for LFT on and N models the following menu settings cannot be accessed changed Calibration Mode and Units The switch in type approved models may set some balance settings as required by the approval agency In non approved models the Menu lock switch will also limit access to certain menu items The Service Menu see section 1 8 2 is not available when the switch is on To regain access to the locked menu settings move the Menu lock switch to the left away from the middle which turns LFT off
13. CHAPTER 4 TESTING 4 5 PERFORMANCE TESTS Accurate performance of the Navigator scales is determined by a series of four performance tests The displayed readings are compared with the tolerances listed in Tables 4 2 and 4 3 Tolerance values are expressed in counts A one count difference is shown in the last digit on the scale display TABLE 4 2 TOLERANCES Model Precision d Repeatability d Linearity d OCL NV212 1 2 2 3 NV311 N or M t1 1 2 1 MPE NV511 1 2 2 3 NV1101 1 2 2 3 NV2101 1 2 2 3 NV4101 1 2 2 3 5101 1 2 2 3 NVL511 1 2 2 3 NVL1101 1 2 2 3 NVL2101 1 2 2 3 NV3100 N or M 1 1 2 1 MPE NVL5101 1 2 2 3 NVL10000 1 2 2 3 NVL20000 t1 2 2 3 NVT1601 1 2 2 3 NVT1601 N or M 1 1 2 1 MPE NVT3201 1 2 2 3 NVT3200 N or M 1 1 2 1 MPE NVT6400 N or M 1 1 2 1 MPE NVT6401 1 2 2 3 NVT10001 1 2 2 3 NVT16000 t1 2 2 3 NVT16000 N or M 1 1 2 1 MPE NOTE The following performance tests are used to evaluate scale operation before and after repairs The scale must meet the requirements specified in each test as well as the specifications listed in Table 4 2 Before proceeding with the following tests the scale should be calibrated See Appendix A 4 5 1 Precision Test The Precision Test is a quick test that measures the deviation of a limited number of weight readings
14. No until SERb displays Press Yes to enter the stability setting menu The current stability setting is displayed Press No to increment the setting Press Yes Fri ad to accept the displayed value and advance to l me o ae a the next menu item A Zero B 8 AUTO ZERO SETTING Navigator Series Service Manual 41 Ohaus Corporation www ohaus com APPENDIX B THE SERVICE MENU There are four settings for the automatic zero setting mechanism AZSM 0 5d The display will maintain a zero indication if the scale does not detect a change of more than 0 54 This is the factory default 14 The display will maintain a zero indication if the scale does not detect a change of more than 1d 3d The display will maintain a zero indication if the scale does not detect a change of more than 3d OFF The setting will disable the automatic zero setting mechanism AZSM This is generally used for testing purposes only In the Service Menu press No until A 2Era displays Press Yes to enter the auto zero setting menu The current auto zero setting is displayed Press No to increment the setting Press Yes PF iri 4 to accept the displayed value and advance to 7l Lm m 7l NO a o ne the next menu item LFT 9 EXPANDED RESOLUTION E PAnd sets the readability to 1 10 of the standard readability That is if standard readability is 01 with E PAnd on it would be 001 Raw sca
15. TABLE 1 5 NAVIGATOR USER MENU STRUCTURE Sub Menus C a l S e t u p M o d e U n i t E n d Span A off Count ct 0 kg grn Ib Lin Disply Percnt 02 lb 0z ozt N Menu Items Bright Hold dwt IR LEFT Accum thk tsg ttw IR RGHT Check tola tical End End End End Note Available units and modes vary by model and local regulations 1 8 2 Service Menu The Service Menu is intended for use by service personnel The menu items are generally used when servicing the scale but there are setting that may be changed to satisfy a customer s special requirements For more detail on using the service menu see Appendix B Ohaus Corporation www ohaus com 14 Navigator Series Service Manual CHAPTER 1 GETTING STARTED TABLE 1 6 NAVIGATOR SERVICE MENU STRUCTURE Service Menu Menu ltems Ramp Lin Span Geo Filter Stability AZT Expand Reset End Navigator Series Service Manual Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE 2 DIAGNOSTIC GUIDE This section of the manual contains troubleshooting information Information is contained to isolate specific problems using Table 2 1 Diagnostic Guide Follow all directions step by step Make certain that the work area is clean Handle scale components with care Use appropriate electro static protection devices to prevent damage to the sensitive electronic components 2 1 TROUBLESHOOTING 2 1 1 Gen
16. TARE o N Oar N Place the test mass on the Scale and record the weight Ohaus Corporation www ohaus com 30 Navigator Series Service Manual CHAPTER 4 TESTING 9 The difference in the weights of the test mass should be within the tolerance in Table 4 2 If the differences are out of tolerance calibrate see Appendix A 1 and repeat the test 10 If the Scale remains out of tolerance the Load Cell may need to be replaced 4 5 4 Off Center Load Test The Off Center Load Test is used to determine whether displayed weight values are affected by moving the sample to different areas of the Pan 11 Place half of the scale s capacity in the center of the Pan 7 Note the reading 8 Move the mass halfway between the center and the edge to the front of the Pan Note any differences in the displayed weight reading 9 Repeat the test for the back left and right position of the Pan 10 Maximum allowable change in displayed weight readings for each of the four positions can be found in Specifications Tables Chapter 1 If this maximum is exceeded follow procedures in Section 4 5 5 Adjusting Off Center Load 4 5 5 Adjusting Off Center Load If the Off Center Load OCL is excessive perform adjustment as follows 1 Top view of Load Cell Side view of Load Cell N Weighing Pan s center with points A D indicated Figure 4 4 Navigator Load Cell and Weighing Pan 1 Place the test weight in the center
17. by Operational and Performance tests Chapter 4 oar w Navigator Series Service Manual 47 Ohaus Corporation www ohaus com APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES TABLE D 1 GEOGRAPHICAL ADJUSTMENT VALUES Elevation above sea level in meters Geographical 325 650 975 1300 1625 1950 2275 2600 2925 3250 latitude away 325 650 975 1300 1625 1950 2275 2600 2925 3250 3575 from the equator North Elevation above sea level in feet or South in degrees and 0 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 minutes 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 0 00 5246 5 4 4 3 3 2 2 1 1 0 0 5 46 9252 5 5 4 4 3 3 2 2 1 1 0 9 52 12 44 6 5 5 4 4 3 3 2 2 1 1 12 44 15 06 6 6 5 5 4 4 3 3 2 2 1 15 06 17 10 7 6 6 5 5 4 4 3 3 2 2 17 10 19202 7 7 6 6 5 5 4 4 3 3 2 19 02 20 45 8 7 7 6 6 5 5 4 4 3 3 20 45 22 22 8 8 7 7 6 6 5 5 4 4 3 22 22 23 54 9 8 8 7 7 6 6 5 5 4 4 23254 25 21 9 9 8 8 7 7 6 6 5 5 4 25 21 26 45 10 9 9 8 8 7 7 6 6 5 5 26 45 28 06 10 10 9 9 8 8 7 7 6 6 5 28 06 29 25 11 10 10 9 9 8 8 7 7 6 6 29 25 30 41 11 11 10 10 9 9 8 8 7 7 6 30 41 31 56 12 11 11 10 10 9 9 8 8 7 7 31 56 33 09 12 12 11 11 10 10 9 9 8 8 7 3309 34 21 13 12 12 11 11 10 10 9 9 8 8 34 21
18. causing the load cell to appear defective 2 Remove the Load Cell turn the scale over holding the Load Cell by hand and remove the 2 load cell screws from the bottom housing The NV model uses cross recess screw heads Phillips type while the NVL and NVT use hex socket head screws 3 Turn the scale back on its feet and gently lift off the Load Cell the attached PCB and the AC Adapter cable Place the Load cell and the PCB on a static protected work area 4 The load cell connection is a five wire cable that is soldered directly to the PCB Before disconnecting the cable record the wire colors and their location on the PCB Hint A digital picture is an easy and reliable record Disconnect the cable connecting the PCB to the Load Cell by un soldering the 5 wires from the PCB Take care not to over heat the PCB which will damage the thin PCB conductors Re Assembly 1 Re solder the new load cell to the PCB connection J3 NOTE The spare part Load Cell may not have the same wire color identifications as the original load cell It is necessary to identify the wires from the table below 43 has 5 solder pads with the following connections left to right Shield EXE SIG SIG EXE TABLE 3 1 Load Cell Wire Color Identification Shield Bare wire with sleeve EE gt SIG White wire Load cell NV3100 SIG Red wire Load cell NV4101 NV5101 EXE Green wire Load cell NVL20000 Shield Bare wire with black sl
19. from a set of weight readings This test uses more weight data than the Precision Test and will allow for occasional weight deviations due to testing variations Requirements To perform this test a single mass must be used for all readings The test mass should be approximately 1 2 of the capacity of the instrument Wear gloves when handling the mass Set Up Before starting a repeatability test set up the instrument as follows Enter the service menu see appendix B 1 and adjust and record the following settings A Setthe Stability setting to 0 54 its lowest setting B Setthe Filter level to L2 close to mid range C Set the AZT Auto Zero Tracking to 5d its lowest setting Do not turn it off Enter the User Menu see 1 8 1 and adjust the following settings A Set the instrument to display the same units as the performance specifications Usually kg g or mg Record Settings Stability Setting Filter Level Setting Auto Zero Tracking Setting Displayed Units Mass Used Ohaus Corporation www ohaus com 28 Navigator Series Service Manual CHAPTER 4 TESTING Test Procedure 1 Zero the instrument 2 Using a test mass approximately half the capacity of the instrument place the mass on the center of platform Record the reading on the worksheet provided 3 Remove the mass from the platform 4 Repeat this test starting at Step 1 until you record a total of ten readings
20. of the Weighing Pan 2 Tare the balance 3 Move the weight to point A and record the reading Navigator Series Service Manual 31 Ohaus Corporation www ohaus com CHAPTER 4 TESTING o nm a 9 Move the weight to point B and record the reading Move the weight to point C and record the reading Move the weight to point D and record the reading If the reading at point A is negative file at points 1 and 4 AT AN ANGLE If the reading at point B is negative file at points 1 and 2 STRAIGHT ACROSS If the reading at point C is negative file at points 2 and 3 AT AN ANGLE 10 If the reading at point D is negative file at points 3 and 4 STRAIGHT ACROSS 11 Repeat 1 to 10 until within specifications been filed already If the beam has not been filed previously you can adjust 10 counts Remember when filing you are weakening the beam File a little at a time N Note It is not recommended that you try to adjust more than 5 counts if the beam has Ohaus Corporation www ohaus com 32 Navigator Series Service Manual CHAPTER 5 PARTS LISTS 8 DIAGRAMS 5 PARTS LISTS amp DIAGRAMS This section of the manual contains exploded views for the Navigator series scales The exploded view drawings are designed to identify the parts which can be serviced on the scale in the field NOTE In all cases where a part is replaced the scale must be thoroughly checked after the replacement is made The scale MUST meet the paramet
21. 05 0 1 0 2 gr 22400 44800 112000 224000 grn x 10 x 20 x 50 x 100 933 5 1867 4666 x 5 x1 2 Navigator Series Service Manual 9 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 6 SCALE OPERATION This section contains information on the basic operation of the scale Input Jack The included AC adapter may be 22 amp used to power the scale when battery 2 power is not available l SS 2 Figure 1 1 Power Connection 1 6 1 Overview of the Controls Figure 1 2 Navigator approved models Overlay Ohaus Corporation www ohaus com 10 Navigator Series Service Manual CHAPTER 1 GETTING STARTED TABLE 1 3 FUNCTIONS OF DISPLAY CONTROLS Function Mode Back Tare Menu Exit IR Sensor Left IR Sensor Right Short Press when on Sets display to zero when off Turns balance on Long Press when on Turns the balance off Short Press in Menu Selects accepts displayed setting Short Press See Interface Manual for operation description Long Press Toggles through active units Short Press in Menu Toggles through available settings Short Press Selects function setting Long Press Selects active Mode Short Press in Menu returns to previous settings Short Press Enter clear a Tare value Long Press Enters User Menu Short Press in Menu Quickly exit User Menu IR Sensors can be programmed to act as touchless buttons They can be programmed to perform the Tare Func
22. 0kg NVL20000 10kg 10kg 20kg NVT1601 1kg 1kg 1 5kg NVT1601 N or M 1kg 1kg 1 5kg NVT3201 2kg 2kg 3kg NVT3200 N or M 2kg 2kg 3kg NVT6400 N or M 5kg 3kg 6kg NVT6401 5kg 3kg 6kg NVT10001 5kg 5kg 10kg NVT16000 10kg 10kg 15kg NVT16000 N or M 10kg 10kg 15kg Navigator Series Service Manual 25 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 2 OPERATIONAL TEST Connect a functioning Power Adapter to the scale power receptacle located on the bottom of the 1 scale or install the required batteries 2 Plug the Power Cord into a suitable power source 4 3 SEGMENT DISPLAY TEST Turn the scale on and ensure that all segments are enabled and displayed briefly This is a Segment Display Test See Figure 4 1 and Figure 4 2 lt a gt e BA AAA AYIA 4 gt a O lol Hol HII De e va YY YY V Y 10 QW E PO f f fi O N N N f Al fF A P N rey HE HE HE HE H HE HH 9502 e a UU UU VU VU VRR PE CO oC Io Io oX Y CK Imo gt y o a OOO Figure 4 1 LCD Segment Display Figure 4 2 LED old Segment Display 1004 O1G 5 016 6 B st 0102 t E Find LED mm Segment Display cm 4 3 4 4 LOAD CELL TEST USING RAMP To test the Load Cell using RAMP see Appendix B Navigator Series Service Manual Ohaus Corporation www ohaus com 26
23. 7 1lb 1 oz 21b 6 oz Alb 1002 11lb 3 oz 221 05802 4410 11202 X OZ X 1602 X 1602 9802 9802 X 1602 16 395 35 365 67 517 163 96 321 50 643 0 005 0 005 0 005 0 02 0 02 x 0 05 r 7870 16976 32408 78700 154320 308640 rn x2 x2 x2 x 10 x 10 x 20 5 001 10 787 20 594 50 015 98 065 196 13 0 001 0 001 0 001 x 0 005 x 0 005 X 0 01 327 9 707 3 1350 3 3279 5 6430 12860 x 0 1 x 0 1 x 0 1 x 0 5 x 0 5 1 13 625 29 39 56 105 136 26 267 16 534 35 x 0 005 x 0 005 x 0 005 x 0 02 x 0 02 x 0 05 13 49 29 1 55 555 134 92 264 54 529 10 x 0 005 x 0 005 x 0 005 x 0 02 x 0 02 x 0 05 13 6 29 335 56 136 00 266 66 533 35 x 0 005 x 0 005 x 0 005 x 0 02 x 0 02 x 0 05 43 72 94 31 180 04 437 25 857 35 1714 67 0 01 0 01 0 01 0 05 x 0 05 0 1 31 23 67 36 128 6 312 30 612 40 1224 79 0 01 0 01 0 01 0 05 x 0 05 x 0 1 Navigator Series Service Manual 7 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED NVT Models Non Approved NVT1601 NVT3201 NVT6401 NVT10001 NVT16000 8000 16000 32000 50000 800000 x 0 5 x 1 x5 x5 x5 1600 3200 6400 10000 16000 0 1 0 2 0 5 0 5 1 1 6 3 2 6 4 10 16 x 0 0001 x0 0002 x 0 0005 x 0 0005 x 0 001 3 2 6 4 16 22 32 x 0 0002 x 0 0005 x 0 001 x 0 002 x 0 002 OZ 51 2 102 4 256 352 512 dec x 0 005 x 0 01 x 0 02 x 0 02 x 0 05 07 51 102 256 352 512 frac x 8 X x Y x Y x Y Ib oz 3lb 3 20z 6lb 6 40z 16lb 00z 221 002 32lb 002 d
24. ED display version Please refer to Figure 1 3 for LED version Old LED version 1 MFG Enable service mode 2 esc OLED Define current display as old LED display store this data into EEPROM New LED version 1 MFG Enable service mode 2 esc NLED Define current display as old LED display store this data into EEPROM C 3 CONFIGURING THE SCALE If the PC Board has been replaced the scale needs to be configured The software tool will send the PCB the required data for the Model Name entered 1 When communications are reliable return to the Replace PCB tab 2 To configure the scale enter the model name that appears on the Data Label e g NVL5101 See figu C 4 in the Model Name text box See Fig C 5 Model NVL5101 gt SIN 8931317103 Max 51009 d 050 Span Cal Wi 30009 Temp 10 C 40 Power 12 VAC or VDC 042A vista Ohaus Corporation Pine Brook NJ USA Made in China Figure C 4 Model Name on Data Label A Navigator Service Tool V1 00 File Settings Help Replace PCB Download Software Diagnostics Model Name Figure C 6 Model Name entered Ohaus Corporation www ohaus com 46 Navigator Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS Click Start The bar is a graphical measure of the configuration progress When the downloading is complete turn the scale off Turn the scale on and perform a Service Calibration see Appendix B followed
25. NDIX A STANDARD CALIBRATION A 1 SPAN CALIBRATION Standard calibration should be performed prior to using a scale and after service See Section 4 1 for Calibration Masses required for each model Note This menu is locked out in Legal for Trade applications To regain access see Section 1 7 Note Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail 1 With scale powered on press and hold the MENU button until 9 4 appears When HJ the button is released A will then be ol Lo displayed 2 Press Yes to enter the sub menu 5247 will be the first menu item Press Yes y again to accept the display will show a 7 flashing while the zero point weight data is stored 3 The specified calibration weight value will appear Place the weight on the pan Note Early production scales 555 1157 4557 scales e g SW version 1 02 require a Yes press to start the calibration The display shows while the span point weight data is stored 4 When calibration is complete the display shows done and then returns to the previous application mode and 8 12 1 1 scale is ready for use NOTE If calibration fails ensure that the test area is free from drafts and the surface the scale rests on is level and free of vibrations Then try to calibrate again If it continues to fail there may be an inter
26. NGS There are four filter settings L1 Highfiltering display will change slower as the scale analyzes more data before making display changes This is used in less than ideal conditions where the scale display is changing too often L2 Default This factory setting that is useful for most situations L3 Lower filtering The display will update quicker than the factory default setting L4 Low filtering The display will update rapidly This setting is only useful where the weighing conditions are optimal and when fast response is needed The stability indication will have a difficult time indicating a stable weight at this setting In the Service Menu press No until F LEEr appears Press Yes to enter the Filter setting menu The current filter setting is displayed Press Press Yes to accept the displayed value and advance to the next menu item Stability B 7 STABILITY SETTING There are four stability settings 0 5d This is setting requires the weight reading to vary less than 0 5d for the stable indicator to be on This setting will require more time for the stable indication Less than ideal weighing conditions may prevent stable indication td This factory setting that is useful for most situations 2d The stable indication will come on quicker than the factory default setting 5d This setting is useful where the weighing conditions are less than optimal and when fast stable indications are needed In the Service Menu press
27. OFTWARE SERVICE TOOL INSTRUCTIONS APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS The Software Service Tool Part Number 83032124 is required when a main PC Board is replaced in a Navigator scale It is used to re configure the scale to its original parameters in the case of a PCB replacement The latest software service tool and support files are available on the Ohaus DMX site A personal computer running the Microsoft Windows operating system Windows NT 4 0 or later or Windows 98 or later is required A RS232 communications port is needed An RS232 Interface Kit PN 83032107 72206287 or 71147376 C 1 1 N oP Ww 8 HARDWARE AND SOFTWARE SETUP First check that the scale s A Off feature under the SETUP menu is set to OFF If this setting is left ON the scale will shut off during configuration Install the RS232 Interface Kit into the scale Follow the instructions in the RS232 Interface Kit User Manual Plug the cable into the PC s RS232 port Install the software on the PC Download the Service Software ZIP file from the Ohaus DMX Navigator directory Place the Zip file in its own directory on the PC un Zip the file Run the program Service Tool by double clicking the exe application file Figure C 1 will appear A Navigator Service Tool V1 00 File Settings Help Download Software Diagnostics Model Name Figure C 1 First screen of the Navigator Service Tool Click Settings on the too
28. Series Service Manual TABLE OF CONTENTS B 4 SPAN CALIBRATION B 5 GEOGRAPHICAL ADJUSTMENT FACTOR GEO B 6 FILTER SETTINGS B 7 STABILITY SETTING B 8 AUTO ZERO SETTING B 9 EXPANDED RESOLUTION E PAnd B 10RESET B 11END APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 1 HARDWARE AND SOFTWARE SETUP C 2 DEFINING LED DISPLAY VERSION C 3 CONFIGURING THE SCALE APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES Navigator Series Service Manual ii Ohaus Corporation www ohaus com TABLE OF CONTENTS LIST OF TABLES TABLE NO TITLE Page No 1 1 A E 2 1 2 Capacity and Headabilily e note CHI tudo ERE EY pter odo ea 5 1 3 Functions of Display te eee er n RA 10 1 4 Display Indicators a a e en ada t 11 1 5 Navigator User Menu Structure ooooooooocoococococnnnnnnnnnnnnonnnnnnononononnnnnnnnnnnnnonnnnnnnnonnnos 13 1 6 Navigator Service Menu Structure 14 2 1 Diagnostic G de re ea rein edet etd a 16 3 1 Load Cell Wire Color Identification 20 4 1 Calibration Mass Values ere 24 4 2 TOMA CAS E ra M Md STAT a 26 4 3 Repeatability Working it nested ea dita 28 4 4 Linearity Test Masses ote an na 29 5 1 NV Housing amp Internal Parts oe A FR 34 5 2 NVL and NVT Housing amp Internal 5 36 D 1 Geographical Adjustment Val
29. ale must pass the Precision and Repeatability Tests and be calibrated before the Linearity Test may be performed TABLE 4 4 LINEARITY TEST MASSES Model Reference Wt Load 1 Load 2 Load 3 NV212 50g 50g 100g 150g NV311 N or M 75g 75g 150g 225g NV511 125g 125 250g 375g NV1101 250g 250g 500g 750g NV2101 500g 500g 1000g 1500g NV4101 1000g 1000g 2000g 3000g NV5101 12509 12509 25009 37509 NVL511 125g 125 250g 375g NVL1101 250g 250g 500g 750g NVL2101 500g 500g 1000g 1500g NV3100 N or M 750g 750g 15009 22500 NVL5101 12509 12509 25009 37509 NVL10000 2500g 2500g 5000g 7500g NVL20000 5000g 5000g 10000g 15000g NVT1601 400g 400g 800g 12009 NVT1601 N or M 4009 4009 8009 12009 NVT3201 7509 7509 15009 22509 NVT3200 N or 7509 7509 15009 22509 NVT6400 N or M 15009 15009 30009 45009 NVT6401 15009 15009 30009 45009 NVT10001 25009 25009 50009 75009 16000 40009 40009 80009 120009 16000 40009 40009 80009 120009 NOTE All masses nominal values Be certain to use the same reference mass throughout the procedure Place the test mass on the Scale record the weight and remove Place Load 1 on the Scale and press TARE Place the test mass on the Scale record the weight and remove Place Load 2 on the Scale and press TARE Place the test mass on the Scale record the weight and remove Place Load 3 on the Scale and press
30. ations are not met Special Note regarding Approved scales The specifications for the approved scales below are only for initial testing These scales must be tested according to the requirements of the local Weights and Measures authority Before returning the scale to service an approved representative of the local Weights and Measures authority must certify the scale Ohaus does not generally recommend the repair of an approved scale that involves replacement of the load cell or PCB TABLE 1 1 SPECIFICATIONS NV non Approved Model NV212 NV511 NV1101 NV2101 NV4101 NV5101 Capacity g 210 510 1100 2100 4100 5100 Repeatability g 0 02 0 2 0 2 0 2 0 4 Linearity 0 30 02 30 2 30 2 30 2 10 4 1 OCL g 0 03 0 3 0 3 30 3 40 6 41 5 Zero Drift g C 0 03 0 2 0 2 30 2 30 4 t1 Span Sensitivity g C 0 01 30 1 30 1 30 1 40 2 30 5 NV CMC Approved Model NV212B NV511B NV1101B NV2101B NV3101B NV5100B Capacity 200 510 1100 2100 3100 5100 Repeatability g 0 02 0 2 0 2 0 2 0 4 1 Linearity 0 30 02 0 2 0 2 20 2 30 4 t1 OCL g 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE Zero Drift 1e 5 C 1e 5 C 1e 5 C 1 5 le 5C 1e 5 C Span Sensitivity 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE 1 MPE Ohaus Corporation www ohaus com 2 Navigator Series Service Manual CHAPTER 1 GETTING STARTED NV EC OIML Type Approved
31. ator Models Common hand tools are sufficient to disassemble the Navigator scales Turn the scale off and unplug the power cord before you begin Remove any installed batteries On models with the Rechargeable Battery Option installed the battery and the Recharge PCB must be removed See the Rechargeable Battery Option Kit instructions for additional information 1 Remove the stainless steel Weigh Pan 2 Remove the conductive rubber cap over the Pan Support Screws Navigator Series Service Manual 19 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES NV Models NVL and NVT Models Figure 3 1 Pan Support Conductive Rubber Caps 3 Remove the Pan Support by removing the two screws shown in Figure 3 1 4 Remove the 5 screws holding the Top and Bottom Housings in place See Figure 3 2 Screws that secure the housings Note NV model shown Figure 3 2 Separating the Top and Bottom Housings 5 the scale over and remove the upper housing Ohaus Corporation www ohaus com 20 Navigator Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 8 REPLACING THE LOAD CELL The Load Cell may need to be replaced because of scale instability or because the scale does not calibrate or repeat or because it is physically broken or displays an error code Disassembly 1 Open the scale see Section 3 2 Verify that there is no mechanical interference pinched wire or bad solder connection that may be
32. e residue from the Housing surface Then carefully place the new label where the old one was See Figure 3 8 Function Label Figure 3 5 Function Label Removal 3 6 DOWN STOP ADJUSTMENT The purpose of the down stops is to protect the load cell from physical damage The down stops are created by contacting bosses in the Base and adjustment screws or bosses in the Sub Pan The NV models have 3 down stops left right and center near the load cell attachment to the Sub Pan The NVL and NVT models have 5 down stops left front left rear right front right rear and center near the load cell attachment to the Sub Pan NV models with capacity greater than 2kg and NVL NVT models with a capacity greater than 10kg do not have adjustable down stops The down stop bosses on the Sub pan are designed to be at the correct distance to protect these load cells The smaller capacity load cells require the down stop clearance to be decreased for proper load cell protection Adjustment screws are placed in the Sub pan down stop bosses to reduce the clearance see figure 3 6 Navigator Series Service Manual 23 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES Ze V Models NVL and NVT Models Figure3 6 Down Stop Adjustment Screws To adjust the down stops on the applicable models follow the procedures below Models without adjustable down stops need no action To ensure full we
33. ec 0 0102 0 0102 x 0 0202 x 0 020z x 0 0507 Ib oz 3lb 3 0z 63802 16lb 00z 221 007 32lb 002 X 1607 1607 1607 1607 1607 46 665 93 33 233 32 320 85 466 65 0 005 0 01 0 02 0 02 x 0 05 r 22400 44800 112000 154000 22400 rn 2 x5 x 10 x 10 x 20 15 691 31 38 62 765 98 065 156 91 x 0 001 x 0 002 x 0 005 x 0 005 0 01 933 3 1866 6 4115 5 6417 9333 0 1 0 2 0 5 0 5 1 42 750 85 5 170 98 267 16 427 5 x 0 005 0 01 x 0 02 x 0 02 x 0 05 42 33 84 66 169 32 264 54 423 3 x 0 005 0 01 x 0 02 x 0 02 x 0 05 42 665 85 33 170 66 266 66 426 65 x 0 005 0 01 x 0 02 x 0 02 x 0 05 137 17 274 34 548 7 857 35 1371 7 0 01 x 0 02 x 0 05 x 0 05 x 0 1 97 98 195 96 391 95 612 40 979 8 x 0 01 x 0 02 x 0 05 x 0 05 0 1 Ohaus Corporation www ohaus com 8 Navigator Series Service Manual CHAPTER 1 GETTING STARTED NVT Models EC OIML Type Approved Units NVT1601M NVT3200M NVT6400M NVT16000M 8000 16000 32000 80000 x5 x5 x 10 x 50 1600 3200 6400 16000 x 0 5 x1 2 5 1 6 3 2 6 4 16 0 0005 0 001 0 002 0 005 NVT Models MC Type Approved NVT1601N NVT3200N NVT6400N NVT16000N 8000 16000 32000 80000 x5 x5 x 10 x 50 1600 3200 6400 16000 0 5 x1 2 x5 1 6 3 2 6 4 16 x 0 0005 x 0 001 x 0 002 x 0 005 3 2 6 4 x 16 32 x 0 001 0 002 x 0 005 0 01 51 20 102 40 256 512 x 0 02 x 0 05 0 1 0 2 466 66 93 35 233 3 466 6 02 x 0
34. eeve EXE Black wire Loadcell NVT3200 SIG Red wire Loadcell NVT6400 NVL5101 SIG White wire Loadcell NVT10000 NVT16000 NVL 10000 EXE Green wire Navigator Series Service Manual 21 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES aia ie rad Figure 3 3 Load cell connections J3 2 NV models andthe NVL20000 model require a load cell spacer to be positioned between the load cell and the Base Position the load cell back into the lower housing NVL and NVT models place a lock washer then a flat washer on the load cell screws NV models do not use the washers Turn the scale over to install the 2 load cell screws Loosely tighten the screws so that the load cell can be aligned in the housing While holding the load cell fully tighten the screws The screws should be tight enough so that the load cell does not move when pushed from the side Verify that the load cell is centrally located between the ribs 3 Turn the scale over onto its feet Position the PCB on to its locating pins Coil the excess load cell cable in front of the load cell 4 Slide the AC jack into its position in the lower housing Route the AC adapter cable as shown in Figure 3 4 Position jack Route wires Position PCB on locating Pins Figure 3 4 Position load cell PCB and AC wires 5 To assemble the Housing follow the steps in Section 3 2 1 in reverse order Ohaus Corporation www ohaus com 22 Navigator Seri
35. ements 3 Access the Unit menu Press and hold No until U n appears Press Yes to enter the displayed menu or No to advance to the next menu etc Set the following Units as per local LFT requirements Perform an accurate calibration See Appendix A Set the GEO code to the intended destination Repeat procedure in step 1 except enter the new GEO factor Move the Menu Lock switch to the right closer to the center which sets LFT on Turn the Scale off and disconnect the AC power connection Reconnect the AC power press O T On Offto turn on the scale During power on the display sequence will now include LFT This message confirms the proper setting of the LFT mode and the hardware lock switch Verify proper scale operation and that the required legal requirements are met CAL is locked available modes and units are correct etc 9 The scale can now be sealed if the proper authority is present If the scale cannot be sealed at the current location then the customer must do so at his or her location before the scale is put into legal service 1 8 MENU STRUCTURE Programmable features of the Navigator are contained in the User Menu and Service Menu which are accessed through the Display Panel s control switches The menu structures are illustrated below 1 8 4 User Menu The User Menu is easily accessed and documented for the scale operator For more detail on using the menu see the Navigator Instruction Manual
36. eplace Load Cell Overload gt cap 9e Load exceeds balance maximum capacity remove weight from the pan Under load Reading below min range Re install pan 1 Switch to a unit where the tare Max Reference weight is too low 2 Clear the tare No load on the pan Press tare button 3 Clear the tare Perform Zero operation if it is allowable this will also clear the tare Tare out of range 4 New tare is established Perform tare if load Max Displayed value gt 999999 Result exceeds display capability Contact Ohaus or an authorized service Internal data error agent Fail to write EEPROM Contact Ohaus or an authorized service agent Contact Ohaus or an authorized service Invalid checksum data agent Non approved models turn Menu Lock switch off Approved models will require are locked out or Menu Lock switch is on re sealing of the scale if the switch is cannot be moved changed Ohaus Corporation www ohaus com 18 Navigator Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 MAINTENANCE PROCEDURES 3 1 PREVENTIVE MAINTENANCE Ohaus scales are precision instruments and should be carefully handled stored in a clean dry dust free area and cleaned periodically Follow these precautionary steps When a scale has had chemicals or liquids spilled on it all exterior surfaces should be cleaned as soon as possible with warm water on a damp cloth
37. eral procedures for Troubleshooting 1 Do the most obvious user level remedies 2 Visual Check Check that the internal parts are clean and free from debris Examine the scale for damage or signs of abuse replace any damaged items Examine the load cell for signs of bending twisting or corrosion Check the overload stops adjust if necessary see Section 3 6 Use the error code table for solutions for specific codes Use the Diagnostic Guide locate the symptom then follow the suggested remedies in order 2 2 DIAGNOSTIC GUIDE Table 2 1 is a Diagnostic Guide designed to help locate the problem area quickly and easily The probable causes are listed with the most common cause first If the first remedy does not fix the problem proceed to the next remedy Before attempting to repair the scale read all chapters of this manual to be familiar with the scale components and operation Diagnosis 1 Isolate and identify the symptom 2 Referto Table 2 1 Diagnostic Guide and locate the symptom 3 Follow the suggested remedies in the order they appear 4 Perform the indicated checks or see the appropriate section of the manual 5 Repair or replace the defective section of the scale NOTE If more than one symptom is observed approach one area at a time and remember that the symptoms may be interrelated If a problem arises that is not covered in this manual contact Ohaus Corporation for further information Ohaus Corpora
38. erface not not correct working Move scale to suitable location allow scale to stabilize its temperature Poor Internal mechanical interference repeatability Move scale to suitable location allow scale to stabilize its temperature Cannot calibrate See Interface User Manual for proper settings Poor Cable connection Check cable connection Navigator Series Service Manual 17 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE Lo rEF rEF Err Err 30 CAL Err 4 4 Full Err 8 1 Err _Lofd Err B 3 Err LoRd Err B S ERrE Err 999999 Err 9 dRER Err 13 PEM Err 53 u Some Menus or menu settings Defective Interface or cable Replace Increase reference weight or continue to weigh with less accurate results Parts counting sample weight Shows error exits mode or goes to 1d EL Incorrect calibration weight See Table 4 1 for correct weights RS232 buffer is full Set Handshake on see Interface User Manual Power on zero range exceeded Clear pan check Shipping Lock setting View RAMP in scale service menu to FETO aS une check Load Cell and then calibrate Load Cell is damaged Replace Load Cell Power on zero under range pan Install pan check Shipping Lock setting was removed prior to power on and re zero View RAMP in scale service menu to Ze AMEA check Load Cell and then calibrate Load Cell is damaged R
39. ers of all applicable specifications in this manual If further technical information is needed please contact your local Ohaus distributor or Ohaus Corporation www ohaus com 7 Campus Drive Suite 310 Parsippany NJ 07054 USA Tel 973 377 9000 Fax 973 944 7177 In the United States call toll free 800 526 0659 between 8 00 a m and 6 00 p m EST Navigator Series Service Manual 33 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 51 HOUSING amp INTERNAL PARTS Figure 5 1 Navigator NVL and NVT Housing amp Internal Parts Ohaus Corporation www ohaus com 34 Navigator Series Service Manual CHAPTER 5 PARTS LISTS 8 DIAGRAMS TABLE 5 1 HOUSING amp INTERNAL PARTS Drawing Description Item 1 Pan 2 Pan Support 3a Function Label LCD 3b Function Label LED Housing Top No Labels Housing Bottom Shipping Lock Load Cell 7a Main PCB LCD 7b Main PCB LED 8a LCD Display and Backlight 8b LED Display 9 Cable Kit Power Adapter Jack Cable shown 10 Level Bubble and Light Guide 11 Battery Cover 12 Interface Cover 13 Battery Connection Spring 14 Feet 20 Hardware Kit Not shown Power Adapter no plugs Not shown Power Adapter Plug Set Not shown Packaging Insert Not shown Box Shipping Navigator Series Service Manual 35 Ohaus Corporation www ohaus com APPENDIX A STANDARD CALIBRATION APPE
40. es Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 4 REPLACING THE PRINTED CIRCUIT BOARD AND DISPLAY 1 Open the scale see Section 3 2 2 Pick the PCB off its mounting pins and position the PCB upside down so that the load cell wire connection is easy to access 3 Disconnect the Load Cell cable from the PCB The load cell connection is a five wire cable that is soldered directly to the PCB Before disconnecting the cable record the wire colors and their location on the PCB Hint A digital picture is an easy and reliable record Disconnect the cable connecting the PCB to the Load Cell by un soldering the 5 wires from the PCB Take care not to over heat the PCB which will damage the thin PCB conductors 4 Unsolder the AC Cable wires from the PCB 5 Follow these steps in reverse order to install the new PCB 6 Configure the Scale See Appendix C Note The PCB and the LCD Display are supplied as a single unit However if only the LCD Display needs replacement it can be separated from the PCB by unsoldering the fine lead wires connecting it to the PCB When installing the new LCD Display carefully feed the lead wires through their holes check that the new assembly is seated properly on the PCB and then solder the lead wires 3 5 REPLACING THE FUNCTION LABEL The Function Label may need to be replaced See Chapter 5 for parts information Use a broad blade such as a wide X Acto knife to remove the label Clean the glu
41. f the Pan If there was a weight reading change turn the adjustment screw nearest the quadrant counterclockwise 1 4 turn Repeat the test to see if it is corrected 6 If the weight is placed at the edges of the pan there may be a weight change which indicates the down stop is working and this is okay Ohaus Corporation www ohaus com 24 Navigator Series Service Manual CHAPTER 4 TESTING 4 TESTING Before and after servicing a Navigator scale an operational test and various performance tests should be made to confirm that the scale meets specifications Turn the scale on and allow it to warm up for at least one hour before performing these tests NOTE Make sure the test area is free from drafts and that the scale rests on a level and vibration free surface 4 1 TEST MASSES REQUIRED The masses required to test the Ohaus Navigator scales must meet the requirements of ASTM Class 4 or OIML F2 Tolerance The mass values are listed in Table 4 1 TABLE 4 1 CALIBRATION MASS VALUES Span Linearity Model Calibration mass Calibration masses NV212 200g 100g 200g NV311 N or M 200g 200g 300g NV511 300g 300g 500g NV1101 500g 500g 1000g NV2101 1kg 1kg 2kg NV3100 N or M 2kg 2kg 3kg NV4101 2kg 2kg 4kg NV5101 3kg 3kg 5kg NVL511 3009 3009 5009 NVL1101 500g 500g 1000g NVL2101 1kg 1kg 2kg NVL5101 3kg 3kg 5kg NVL10000 5kg 5kg 1
42. igator Scales are listed in Table 1 2 TABLE 1 2 CAPACITY AND READABILITY NV Models Non Approved NV212 NV511 NV1101 NV2101 NV4101 NV5101 1050 2550 5500 10500 20500 25500 x 0 05 x 0 5 0 5 0 5 x 1 x5 210 511 1100 2100 4100 5100 x 0 01 0 1 0 1 0 1 0 2 0 5 11 2 4 1 5 1 NA NA NA 1 1245 2 425 4 6295 9 039 11 244 x0 0005 x0 0005 x 0 0005 x 0 0005 x 0 002 7 4075 17 990 38 8 74 075 144 63 179 9 dec x0 0005 x0 005 x 0 005 x 0 005 x 0 01 x 0 02 z 7 1778 3834 74 14458 17978 s s s Y x Y x Vs NA 1lb 1 990z 2lb 6 80z 4lb 10 070z 9lb 0 630z 11lb 3 90z dec 0 0102 x0 010z x 0 0102 x 0 0102 x 0 020z nits N c o N 1 1lb 1 0z 21b 6340z 4lb 100z 9lb 0 oz 11lb 3 0z X OZ X 7807 X 7807 X 78027 X 7807 6 7515 16 395 35 365 67 517 131 82 163 96 x 0 0005 x 0 005 x 0 005 x 0 005 x 0 01 x 0 02 ans 3240 7870 16976 32408 63275 78700 9 8 0 2 2 2 2 x5 x 10 frac Bao o N e 2 0594 5 001 10 787 20 594 40 206 50 015 x 0 0001 x 0 001 x 0 001 x 0 001 x 0 002 x 0 005 135 03 327 9 707 3 1350 3 2636 4 3279 5 0 01 0 1 0 1 0 1 0 2 0 5 5 6105 13 625 29 39 56 105 109 54 136 26 0 0005 0 005 0 005 0 005 0 01 0 02 5 5555 13 49 29 1 55 555 108 47 134 92 0 0005 0 005 0 005 0 005 0 01 0 02 du 5 6 13 6 29 335 56 109 34 136 00 x 0 0005 x 0 005 x 0 005 x 0 005 x 0 01 x 0 02 18 004 43 72
43. ight reading The proper down stop adjustment will allow full weight reading provided the center of the mass is less than the distance from the pan center to the pan edge To allow for tolerance this adjustment is being done at 120 of scale capacity or at scale capacity but 34 of the distance to the pan edge To protect the load cell To protect the load cell from physical damage the down stops should touch at about 200 of scale capacity Again to allow for adjusting tolerance the adjustment is made using a 15096 weight The adjustment screws in the Sub Pan can be adjusted with a 92 cross recess Phillips screw driver Each adjustment screw should contact the Base when 120 to 150 of the scale capacity is placed in the center of the 4 quadrants of the scale The Top Housing must be removed to visually check if the down stops are touching Turn the adjustment screw counterclockwise to increase the clearance and clockwise to decrease the clearance An easy method to check the down stop adjustment is to use the scales weight reading to detect if the down stop is touching This method can only check if the down stop is set too close preventing accurate weighing 1 Place 10096 scale s capacity in the center of the Pan Note the reading Move the mass 34 of the way between the center and the edge to the front of the Pan Note any significant difference in the displayed weight reading Repeat the test for the back left and right position o
44. l bar then select Com Port from the dropdown menu Set the Port to match where the RS232 is connected to the PC Set baudrate data and parity to match the settings of the scale If these settings are unknown check the RS232 Menu in the scale Note In the scale user menu data and parity are combined in the Parity menu selection e g 7 none The scale settings shown in Fig C 2 are the default values for Navigator Ohaus Corporation www ohaus com 44 Navigator Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS Navigator Service Tool V1 00 Replace PCB Download Software Diagnostics Com Port Configuration Baudrate Data Parity Defaults Cancel OK Figure C 2 Com Port Configuration screen 9 Click the Diagnostics tab to test the communications See Figure C 3 A Navigator Service Tool V1 00 File Settings Help Replace PCB Download Software Type Command Response From Scale Figure C 3 Diagnostic screen Enter a P command The scale should respond with a weight value e g 0 20 Enter a V command The response should be the software version e g Sr 1 03 Navigator Series Service Manual 45 Ohaus Corporation www ohaus com APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 2 DEFINING LED DISPLAY VERSION If the software version has been updated to version 1 04 or later the following commands needs to be sent to the scale to define the L
45. le at right is with no weight on the Pan It will vary with other scales To exit the ramp function press Yes The scale advances to the Linear calibration menu Press Yes to perform Linear Calibration B 3 LINEAR CALIBRATION Linear calibration automatically follows Ramp To start from the Service Menu press and hold Zero On and Tare together As the scale powers up RAMP appears Press No to bypass Ramp Service Linearity does not have limit ranges on the weights used as does the standard user linearity procedure Note Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail When t N appears press Yes Ohaus Corporation www ohaus com 38 Navigator Series Service Manual APPENDIX B THE SERVICE MENU The display shows while the scale acquires the zero point weight data The display then shows the first calibration point value Place the indicated weight on the Pan and press Yes The display shows while the scale acquires the weight data After the first calibration point value is acquired the display shows the second calibration point value Pressing Yes after placing the prompted weight accepts the second linearity calibration point weight The display shows while the scale acquires the weight data After the second linearity calibration point weight value is acquired the display shows done for 2 seconds and advances to SPAN
46. le data is displayed zero tare and other modes functions will not operate In the Service Menu press No until appears Press Yes to enter the E PAnd setting menu F Pri OFF appears Press No to toggle the setting 45 2 2211 SULA appears Pressing Yes again accepts the setting J When the Service Menu is exited the scale will 2 07 read with expanded resolution until it is turned off in the Service Menu B 10 RESET rESEE returns the scale to its factory default conditions All the user and service settings will return to the factory defaults All reference weights average piece weights and set points will be reset In the Service Menu press No until ESEE appears Press Yes to enter the rESEt setting menu im appears Press No to toggle the setting YES LK HL appears To accept a chosen setting either No or Yes press Yes The display will advance to the DIVA next menu item End Ohaus Corporation www ohaus com 42 Navigator Series Service Manual APPENDIX B THE SERVICE MENU B 11 END Accepting End will exit the Service Menu In the Service Menu press No until End appears Press Yes to exit the service menu or No to advance to the ramp menu setting When the Service Menu is exited the scale will return to AE 1 Et the last active mode with any changes from 25 the Service menu Navigator Series Service Manual 43 Ohaus Corporation www ohaus com APPENDIX C S
47. nal problem To resolve internal problems follow procedures in Chapters 2 and 3 Ohaus Corporation www ohaus com 36 Navigator Series Service Manual APPENDIX A STANDARD CALIBRATION A 2 LINEARITY CALIBRATION Note This menu is locked out in Legal for Trade applications To regain access see Section 1 7 See Section 4 1 for Calibration Masses required for each model Note Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail 1 With scale powered on press and hold the MENU button until 77 Wappears When the dH button is released A will then be oba PS hao displayed 2 Press Yes to enter the sub menu 5747 J 4 will be the first menu item Press No to 14 advance to the 4 7 item mE 3 Press Yes to accept the display will show a flashing while a zero point weight data is stored 4 The first linearity calibration point weight value will appear Place the weight on the pan Note Early TI production scales required a Yes press 22 ii El to continue a a The display shows while the weight data is stored 5 The second linearity point weight value will appear Place the weight on the pan Note Early production scales e g 957 5557 SW version 1 02 require a Yes press 5 ii H to start the calibration a m 247 28 The display shows while the weight data is s
48. om iii Navigator Series Service Manual CHAPTER 1 GETTING STARTED 1 GETTING STARTED 1 4 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Navigator Series scales Familiarity with the scale s Instruction Manual is assumed The contents of this manual are contained in five chapters Chapter 1 Getting Started Contains information on service facilities tools specifications and the mechanical and electronic functions of the scale Chapter 2 Troubleshooting Contains a diagnostic guide and error code table Chapter 3 Maintenance Procedures Contains preventive maintenance procedures and disassembly repair and replacement procedures Chapter 4 Testing Contains a list of required test masses an operational test segment display test performance tests and adjustments Chapter 5 Drawings and Parts Lists Contains exploded views of Navigator scales identifying all serviceable components Appendix A Standard Calibration Explains procedures for Standard Calibration performed prior to using a scale and after service Appendix B Service Calibration Describes the Service Menu and sub menus which allow authorized service personnel to perform factory Linearity and Span calibrations no pre set limits take Ramp readings adjust the GEO Factor and use E PAnd to temporarily increase readability to at least 1 10 of the standard readability A
49. ppendix C Software Service Tool Instructions Used to re configure the scale after replacing a Printed Circuit Board Appendix D Geographical Adjustment Values The chart of scale settings for every geographical latitude away from the equator in degrees and minutes and every elevation above sea level in meters or feet 1 2 SERVICE FACILITIES To service a scale the service area should meet the following requirements e Should be temperature controlled and meet scale specifications for temperature environmental requirements e Must be free of vibrations such as fork lift trucks close by large motors air currents or drafts from air conditioning heating ducts open windows people walking by fans etc e Area must be clean and free of excessive dust e Work surface must be stable and level e Scale must not be exposed to direct sunlight or radiating heat sources e Handle all electronic assemblies with appropriate Electro Static protection Navigator Series Service Manual 1 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 3 TOOLS AND TEST EQUIPMENT REQUIRED 1 Common hand tools are sufficient to disassemble the Navigator scales 2 RS2323 Interface PN 83032106 or 71147376 1 4 SPECIFICATIONS Specifications for the Ohaus Navigator Scales are listed in Table 1 1 When a scale has been serviced it must meet the specifications listed in the table Before servicing the scale determine what specific
50. s follow procedures in Chapters 2 and 3 B 5 GEOGRAPHICAL ADJUSTMENT FACTOR GEO The Geo Factor adjustment allows entry of values from 0 to 31 and is used to compensate for slight variations in gravity at different geographical locations around the world This feature allows authorized personnel to accurately calibrate the scale at a location other than the location where the scale is to be used Prior to calibration the Geo Factor is set to correspond to the geographical location where the calibration is being performed Following calibration the Geo Factor is changed to match the location where the scale is to be used If required the scale may also be sealed according to the required approval regulations NOTE Only an authorized manufacturer s representative or certified verification personnel should make these changes Changing the Geo Factor alters the calibration values In the Service Menu press No until GEG appears Press Yes to edit the GEO setting The current setting is the first to be shown NOTE Factory setting for GEO is 13 in general and 19 for Europe See Appendix D to determine the correct Geo value Values from 1 to 31 are available No will increase the GEO value while Back will decrease it Press Yes to accept the value shown on the display The menu returns to the next item Filter Ohaus Corporation www ohaus com 40 Navigator Series Service Manual APPENDIX B THE SERVICE MENU B 6 FILTER SETTI
51. 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
52. tion Print and Zero functions or be disabled Each sensor is programmed individually Navigator Series Service Manual 11 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 6 2 Overview of the Display Indicators 4 gt Y nam gt A 4 A EMEN gt 5 HH OH Gay 2 7 i 2 i gt VNV YY AH N 09M f MA 1 Off f HEEL EHI HH 1 lp cont 1 VEM U U 4 UU LIH Jka E 1 EII Io 5 S v 9 NA v gt Y 4 4 LED old V V LED new Figure 1 3 Navigator Display Indicators TABLE 1 4 DISPLAY INDICATORS 1 6 3 Power On With power connected AC Adapter or battery press Zero O After segment display OHAUS and software revision number the display will show 0 00 and the current unit standard weighing mode Navigator Series Service Manual Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED If the scale is set for LFT Legal for Trade EC OIML M or NTEP MC models LFT flashes briefly after the software revision number and before a countdown which allows for the scale electronics to stabilize Allow time for the scale to stabilize after moving it from an area which is at a different temperature than the area where it is to be operated
53. tion www ohaus com 16 Navigator Series Service Manual CHAPTER 2 DIAGNOSTIC GUIDE TABLE 2 1 DIAGNOSTIC GUIDE Symptom Possible Cause Remedy Check battery and or AC Adapter connections Verify 12VAC at the Power Jack wire connection to the PCB If using batteries check battery voltage at the PCB battery connections Defective PCB Replace PCB Verify the pan Support is not contacting the top housing Check that the shipping lock is not touching the Pan Support Verify that the down stops are not hitting during normal operation No power to scale Cannot turn on Internal mechanical interference Incorrect weight calibration reading Calibration performed with the Perform span calibration Shipping Lock On Poor linearity performance Perform linearity calibration Unstable environment vibration air currents or changing temperature Bad load cell Replace load cell Verify the pan Support is not contacting the top housing Check that the shipping lock is not touching the Pan Support Bad load cell Replace load cell Unstable environment vibration air currents or changing temperature Incorrect calibration weight Use correct calibration weight See above Incorrect weight reading Cannot access Mode or unit not enabled Enter menu and enable m r uni mode or unit enable mode or unit RS232 USB or Scale menu settings not proper Ethernet Connected computer settings are int
54. tored 6 When calibration is complete the display shows done and then returns A to the previous application mode and IL scale is ready for use NOTE If calibration fails ensure that the test area is free from drafts and the surface the scale rests on is level and free of vibrations Then try to calibrate again If it continues to fail there may be an internal problem To resolve internal problems follow procedures in Chapters 2 and 3 Navigator Series Service Manual 37 Ohaus Corporation www ohaus com APPENDIX B THE SERVICE MENU APPENDIX B SERVICE MENU This section describes the Service Menu and sub menus which allow authorized service personnel to perform factory Linearity and Span calibrations no pre set limits B 1 ENTERING THE SERVICE MENU Turn the scale off Enter the Service Menu by pressing and holding Zero On and Tare together until APP appears This will take approximately 8 seconds Press Yes to select Ramp B 2 RAMP The ramp display shows the percentage of use of the A to D circuit that is of the temperature compensated duty cycle The actual value is not as important as how it changes It should increase as the weight on the scale is increased The ramp display should remain constant without fluctuations If you press Yes to select Ramp a number appears It should be constant Add masses from minimum to maximum capacity The reading will increase but should not fluctuate The examp
55. ues 48 LIST OF ILLUSTRATIONS FIGURE NO TITLE 1 1 Power GONE 0 gasi a dae 10 1 2 Navigator Overlay siss a le lis 10 1 3 Navigator Display 11 1 4 Menu Lock AAA nen tne rege doe eon aee ze ga dee A 12 3 1 Pan Support and Conductive Rubber 19 3 2 Separating the Top and Bottom 5 19 3 3 Load a salads ee sh 21 3 4 Position Load Cell and AC 21 3 5 Function Label Removal zn a ct se 22 3 6 Down Stop Adjustment SChOWS rece donee ii 23 4 1 LCD Segment Display u ee erstes et 25 4 2 LED Seoment Display r Ra a 25 4 3 Navigator Load Cell and Weighing Pan 30 5 1 Navigator NV Housing 8 Internal 33 5 2 Navigator NVL and Housing Internal 35 C 1 First screen of the Navigator Service 45 C 2 Com port Configuration Sr Naciones 46 C 3 Diagnostic SC OM at a AR a Ai 46 C 4 Model name on Data Label 47 C 4 Model name entered 47 Ohaus Corporation www ohaus c

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