OHAUS Navigator Series, Service Manual

Page 1: ...SERVICE MANUAL NavigatorTM Series Scales...

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Page 3: ...ING THE SCALE 12 3 3 REPLACING THE LOAD CELL 14 3 4 REPLACING THE PRINTED CIRCUIT BOARD AND DISPLAY 16 3 5 REPLACING THE FUNCTION LABEL 17 3 6 DOWN STOP ADJUSTMENT 17 4 TESTING 19 4 1 TEST MASSES REQU...

Page 4: ...ion www ohaus com B 6 LFT 40 B 7 EXPANDED RESOLUTION E PAnd 40 B 8 RESET 40 APPENDIX C SERVICE TOOL 41 C 1 HARDWARE AND SOFTWARE SETUP 41 C 2 REPLACE PCB CONFIGURING THE SCALE 42 C 3 DOWNLOAD SOFTWARE...

Page 5: ...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 se...

Page 6: ...res 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 ap...

Page 7: ...220 0 001 2d 9d 200g 100g 200g NV323 320 0 001 2d 9d 300g 150g 300g NV1202 1200 0 01 2d 6d 1kg 500g 1kg NV2202 2200 0 01 2d 6d 2kg 1kg 2kg NV3202 3200 0 01 2d 6d 3kg 1 5kg 3kg NVT10201 10200 0 1 2d 4d...

Page 8: ...h available settings Function Mode Back Short Press Selects function setting Long Press Selects active Mode Short Press in Menu returns to previous settings Tare Menu Cal Exit Short Press Enter clear...

Page 9: ...u item Press Yes to view the menu item setting or press No to move to the next menu item When viewing the setting press Yes to accept the setting or press No to change the setting When End is displaye...

Page 10: ...tion Stab C on off Set the automatic stable tracking functionality Set it off for dosing or filling application Note Bold always represents factory default Value Availability of IR Sensor is dependent...

Page 11: ...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...

Page 12: ...tion 3 6 3 Use the error code table for solutions for specific codes 4 Use the Diagnostic Guide locate the symptom then follow the suggested remedies in order 2 2 DIAGNOSTIC GUIDE Table 2 1 is a Diagn...

Page 13: ...pU Err 3 0 Incorrect calibration weight See section 2 5 for correct weights Err 4 4 RS232 buffer is full Set Handshake on see Interface User Manual Err 8 1 Power on zero range exceeded Clear pan check...

Page 14: ...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 Check the Power Cord for broken...

Page 15: ...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...

Page 16: ...tected 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...

Page 17: ...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 f...

Page 18: ...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...

Page 19: ...eft right and center near the load cell attachment to the Sub Pan The 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 N...

Page 20: ...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 d...

Page 21: ...r 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 Model Span Calibration mass Linearity Calibration mas...

Page 22: ...ated on the bottom of the 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...

Page 23: ...NVT4201 1 2 2 3 NVT6201 1 1 2 3 NVT2200 1 1 2 3 NVT3200M 1 1 2 3 NVT6200 1 1 2 3 NVT6400M 1 1 2 3 NVT12000 1 1 2 3 NVT16000M 1 1 2 3 NVT22000 1 1 2 3 NV123 1 5 9 8 NV223 1 5 9 8 NV323 1 5 9 8 NV1202...

Page 24: ...ppendix B for Service Calibration If the scale does not pass this test the Load Cell may need to be replaced 4 5 2Repeatability Test The repeatability specification is defined as the Standard Deviatio...

Page 25: ...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 divi...

Page 26: ...Series Service Manual 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 c...

Page 27: ...1000g 1000g 2000g 3000g NVT6201 1500g 1500g 3000g 4500g NVT2200 500g 500g 1000g 1500g NVT3200M 750g 750g 1500g 2250g NVT6200 1500g 1500g 3000g 4500g NVT6400M 1500g 1500g 3000g 4500g NVT12000 2500g 250...

Page 28: ...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 t...

Page 29: ...ts 1 and 4 AT AN ANGLE 8 If the reading at point B is negative file at points 1 and 2 STRAIGHT ACROSS 9 If the reading at point C is negative file at points 2 and 3 AT AN ANGLE 10 If the reading at po...

Page 30: ...eld ATTENTION In all cases where a part is replaced the indicator must be thoroughly checked after the replacement is made The indicator MUST meet the parameters of all applicable specifications in th...

Page 31: ...CHAPTER 5 PARTS LISTS DIAGRAMS Navigator Series Service Manual 29 Ohaus Corporation www ohaus com 5 1 SPARE PARTS NV Figure 5 1 Navigator NV Spare Parts...

Page 32: ...IR NV NVT Overlay Spare EN One IR NV NVT Overlay Spare CN NV NVT 3 Hardware Kit Spare NV NVT 4 Top Housing Assembly Spare NV 5 Loadcell Spare Rated 0 5kgx0 01g NV Loadcell Spare Rated 1kgx0 01g NV Lo...

Page 33: ...CHAPTER 5 PARTS LISTS DIAGRAMS Navigator Series Service Manual 31 Ohaus Corporation www ohaus com 5 2 SPARE PARTS NVT Figure 5 2 Navigator NVT Spare Parts...

Page 34: ...ay Spare EN No IR NV NVT Overlay Spare EN One IR NV NVT Overlay Spare CN NV NVT 3 Hardware Kit Spare NV NVT 4 Top Housing Assembly Spare NVT 5 PCBA Spare 2Laye No IR NV NVT PCBA Spare 2Layer 1IR NV NV...

Page 35: ...CHAPTER 5 PARTS LISTS DIAGRAMS Navigator Series Service Manual 33 Ohaus Corporation www ohaus com 5 3 SPARE PARTS NVHD with Draftshield...

Page 36: ...IR NV NVT 3 Hardware Kit NV NVT 4 Load Cell LAK B 300g M NVHD 5 PCB Main One IR sensor NVHD PCB Main No IR sensor NVHD 6 Feet 7 CableKit 8 Housing Top w EMC plate NVHD NS PowerAdapter noplugs NS Power...

Page 37: ...layed C a l 2 Press Yes to enter the sub menu SPAN will be the first menu item Press Yes again to accept the display will show a flashing C while the zero point weight data is stored C 3 The specified...

Page 38: ...ashing C while a zero point weight data is stored C 4 The first linearity calibration point weight value will appear Place the weight on the pan Note Early production scales required a Yes press to co...

Page 39: ...e 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 readi...

Page 40: ...ds and advances to SPAN Done Press Yes to confirm a span calibration SpaN B 4 SPAN CALIBRATION Span calibration from the service menu allows you to set a new zero and maximum setting This is distinct...

Page 41: ...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 cali...

Page 42: ...e E PAnD setting menu OFF appears Press No to toggle the setting On appears E PAnD Pressing Yes again accepts the On setting When the Service Menu is exited the scale will read with expanded resolutio...

Page 43: ...233 Interface Kit PN 83032107 USB Interface Kit PN 83032108 is not fit for software upgrade C 1 HARDWARE AND SOFTWARE SETUP 1 First check that the scale s A Off feature under the SETUP menu is set to...

Page 44: ...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 Continue from the Procedure 8 in C 1 sectio...

Page 45: ...om 2 Input the Model Name and shipping Country depend on the model then click Next 3 Click Finish when the configuration process is completed C 3 DOWNLOAD SOFTWARE 1 Continue from the Procedure 8 in C...

Page 46: ...ng is complete turn the scale off 5 Turn the scale on and perform a Service Calibration see Appendix B followed by Operational and Performance tests Chapter 4 TABLE C3 1 MODELS AND SOFTWARE MATCHING M...

Page 47: ...30645899_SR1 xx_ NVHD mot NV123 Y NV223 Y NV323 Y NV1202 Y NV2202 Y NV3202 Y NVT10201 Y C 4 DIAGNOSTICS 1 Continue from the Procedure 8 in C 1 section select Diagnostics 2 Enter the Command and click...

Page 48: ...1 54 41 05 05 06 06 07 07 08 08 09 09 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 04 05 05 06 06 07 07 08 08 09 09 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18...

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Page 52: ...poration all rights reserved Registered trademark of Ohaus Corporation The information contained in this manual is believed to be accurate at the time of publication but Ohaus Corporation assumes no l...