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SERVICE MANUAL

1. Rear of scale 9a 1011 12 13 Vi Display m a 02 NET Keypad 10 Hole for antitheft device Display 11 Spirt level Capacity label 12 RS232 Interface Optional Weighing pan 13 RS232 Interface Standard Power cord 14 Stability indicator AC Adapter Scale with battery option 15 Weighing range display for dual range Adjustable feet scales Jack for AC Adapter battery option 16 Center of zero indicator 9a Serial label Europe 17 weighing unit 9b Serial Label USA under weighing 18 Net symbol when weighing with tare platform 19 Battery discharge status optional 0 CI P GO CHAPTER 1 INTRODUCTION 1 3 INTRODUCTION This service manual contains instructions for the repair and maintenance work to be performed by service engineers on the Ranger Counting and Weighing Scales Strain Gauge loadcells It is assumed that the reader is familiar with the operation of the Scale and can refer to the relevant operating instructions when necessary This manual covers maintenance on the following Ranger Counting Scales small platform capacities 3kg and 6kg Ranger Counting Scales large platform capacities 12kg NTEP 15k
2. Z L e Toentera new number press the PRINT UNITS button repeatedly until the desired digit is displayed If you want to leave this position empty make sure that only the cursor is displayed Confirm the digit by pressing the G N T MENU button The cursor then moves to the second position which you can change in the same way This also applies for all the following positions maxi mum of 7 digits e To quit this block press the G N T MENU button again after entering the last digit END will appear in the display if you want to continue through the displays press PRINT UNITS button the display advances to RANGE 3 38 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 5 Working in Service Mode Cont Fnnrr Specifying weighing range FHILIE If the analog PCB is replaced it is necessary to specify the weighing range because the EEPROM on the PCBis setto a default value at the factory 15 kg dual range scale It is also necessary to set the weighing range if a weighing cell of a different capacity is installed The scale resolution is also automatically specified with the weighing range If you want to specify the weighing range press the G N T MENU button to display the range currently se lected or the factory set default weighing range if the analog PCB or EEPROM has been replaced e Use the PRINT UNITS button to select the weighing range appropriate for the scale If the symbol l lt gt l 2 also app
3. Note on calibration It is recommended that noncertifiable scales are also calibrated under full load If required however these can also be calibrated at less than full load minimum approx 25 of full load The calibration tolerance given in the table applies to calibration under full load It is reduced in proportion to the calibration weight used Note on linearity The linearity of noncertified scales must be verified at 25 50 75 and 100 of full load Tolerances are given in the calibration diagrams in the preceding subsection If there are not enough test weights available linearity can still be tested as follows 1 Place one or more test weights on the scale that together amount to some 259 of full load Note the deviation 2 Remove the weights from the scale 3 Place a weight on the scale that amounts to some 25 of full load and then tare the scale 4 Place the test weights used in step 1 on the scale and note the deviation This tests the linearity in the range between 25 and 50 of full load since the scale was tared with a preload of about 25 in step 3 5 The linearity of the scale can thus be tested up to full load by repeating step 3 with a weight of 5096 or 75 of full load and step 4 4 2 CHAPTER 4 DATA TABLES 4 1 3 Overview of Weighing Cells and Preloads TABLE 4 3 STRAIN GAUGE WEIGHING CELLS Weighing pan Replacement Preload Preload Total of load Mechanical Preload reserve Cellcapa
4. 3 29 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 3 Replacing the Internal Rechargeable Battery Ranger scales that include 1 or 3 in their model numbers contain an internal rechargeable battery These batteries have a finite life expectancy and may require replacement at some time during the life of the scale Battery life is effected by factors such as ambienttemperature method of charging depth of discharge and the amount of time between charge and discharge Indications of a failing battery may include A reduction in operating time between charging and the low battery condition A continuous low battery condition even after charging A scale that cannot be operated without the power pack being connected A scale that will not power on even with the power pack connected To replace the rechargeable battery follow the procedure below With the scale inverted unscrew the adjustable feet and remove them Undo the bottom plate retaining screws removing them and the plate itself On small platform models lift the two ribbon cables out from the gap that runs along the edge of the battery Tuck these cables out of the way until the new battery is installed Remove the battery held on by an adhesive patch from the inner wall of the housing If necessary carefully insert a flat blade knife or screwdriver between the battery and housing and pry them apart Remove all traces of adhesive from the housing Caution Because the battery c
5. 43 26 43 26 44 32 44 32 45 38 45 38 46 45 46 45 47 51 47 51 48 58 48 58 50 6 50 6 51 13 51 13 52 22 52 22 53 31 53 31 54 41 54 41 55 52 5552 57 4 57 4 58 17 58 17 59 32 59 32 60 49 60 49 62 9 62 9 63 30 63 30 64 55 64 55 66 24 66 24 67 57 67 57 69 35 69 35 71 21 71 21 73 16 73 16 75 24 75 24 77 52 77 52 80 56 80 56 85 45 85 45 90 00 OD JJ o o 0 oO WANN DO TH A ODO JJ o o Om Oo A Oo Oo Om Om gt gt C OD WANN DOO Om Om P HW OD WANN o o 00 N OD JJ o o Om PS 050 Im N o o AHH So Go Inm wo WANN DO gt E Go 5 0010 P IO IO IO IO IO IO IO IO IO IO IO IQ IQ IQ IQ IO IO IQ IO ch zb ch ch hb ch hb oc OG JJ o OPE E JJ o oo o EF A I aan nnn nnn niin oO OO Oo E E 0 MM oo bk EF M m MM MM M MM h MM A A ch A aan nn nnn o Oo
6. Adapter EE 3 29 3 3 3 Replacing the Internal Rechargeable battery 3 30 3 3 4 Replacing the Analog dlc Dent oh et 3 32 3 3 5 Replacing the Display Mounting Plate Display Unit ema Digital EE 3 32 GT Preliminary Wolk idee oe E EE M D 3 32 3 3 5 2 Replacing the Display Mounting Plate 3 33 3 3 5 3 Replacing the Liquid Crystal Display LCD or the Backlighting Unit vct tte een i ethic 3 33 3 3 5 4 Replacing the Digital 3 33 9 3 0 Final Heassotbly EE 3 34 3 3 7 Replacing the SOITWaEO 3 34 3 3 8 Replacing the Weighing Cell 3 34 3 3 8 1 Replacing a Strain Gauge Weighing Cell 3 34 3 3 9 Accessing and Using Service Mode 3 36 3 3 9 1 Accessing Service Mode with Scales thatare not Certified 3 36 3 3 9 2 Accessing Service Mode with Certified Scales 3 36 3 3 9 3 Accessing Service Mode 3 37 3 3 9 4 Service Mode BIOCKS 3 37 3 3 9 5 Working in Service Mode 3 38 TABLE OF CONTENTS Cont CHAPTER 4 DATA TABLES 4 1 introduction ebd Gc eee E eR v edv udo 4 1 4 1 1 Certifiable and Certified Ranger Scales with Strain Guage Weighing Be 4 1 4 1 2 Noncertifiable Ranger Scales
7. CHAPTER 3 MAINTENANCE PROCEDURES Replacing the Display Mounting Plate Note In order to replace the display mounting plate the keypad membrane must be removed This cannot then be reused and must also be replaced 3 3 5 3 3 3 5 4 Remove keypad membrane Push the 3 cantilever snaps at the front edge of the display mounting plate inwards to release the plate and remove it to the front Insert the new display mounting plate into the aperture so that it clicks into place Apply the new self adhesive keypad membrane Replacing the Liquid Crystal Display LCD or the Backlighting Unit Place the display unit with the digital PCB downwards on a static protective surface Disconnect the backlighting ribbon cable from the digital PCB Carefully insert a flat blade screwdriver size 4 between the digital PCB and the backlighting unit immediately adjacent to the connectors With the screwdriver pry the liquid crystal display and the backlighting unit out of the socket strips When doing this lever the shaft of the screwdriver against the edge of the digital PCB Never lever the tip of the screwdriver against the surface of the PCB as this could damage the PCB Place the new backlighting unit onto the digital PCB it snaps into place on the board Carefully place the LCD onto the backlighting unit and ensure that the connector pins are correctly aligned with the socket strips When correctly positioned the ends of the LCD and backlight
8. 1 Tolerance values are expressed in counts A one count change is equal to the last digit shown on the scale display TABLE 3 1 TYPES OF PERFORMANCE TESTS PERFORMANCE TEST TOLERANCE COUNTS Repeatabilt Off Center Load The following performance tests are used to evaluate the scale operation before and after repairs Each scale tested must meet the requirements specified in each test as well as the specifications listed in Tables 1 3 through 1 6 depending upon the model Before proceeding with the following tests all the procedures starting with paragraph 3 2 must have been accomplished on the scale first 3 2 8 1 Repeatabilty Test To conduct a Repeatability Test proceed as follows 1 With the scale calibrated place a mass on the Platform equal to the capacity of the scale Record the reading 2 Remove the mass from the Platform the scale 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 difference Maximum allowable difference is as listed in Table 3 1 3 24 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 8 2 Off Center 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 Platform See Figure 3 5 Place 1 2 of the scale capacity in the center of the Platform 1 Press the ON ZERO OFFbutton to return the reading to zero Move the mass
9. 9 di o RE 4 First press and hold the unlock switch then briefly press the ON G ZERO OFF switch atthe same time release the unlock switch while the software version is being displayed LFT is now setto OFF and LOCSET is setto OFF LFT restrictions are no longer enabled and items in the LOC menu may be changed 3 2 7 4 Weights and Measures Sealing After a weights and measures official has tested and approved the scale it must be sealed by installing the security plate with the security screw Replace the bottom cover and secure with the cover screws Paper Seal A paper seal may be placed over one of the screws at the back of the scale underneath one foot Replace the four feet and turn the scale over Lead Wire Seal For regions requiring a lead wire seal there are 2 cross drilled screws at the rear of the scale The screws can be used in the location as supplied or as an alternate one screw can be used to replace one of the counter sunk screws at the front of the scale Under the leveling feet on small size Ranger Scales HIGH CAPACITY SCALE 3 23 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 8 Performance Tests Accurate performance of the Ranger scales is determined by a series of three performance tests The displayed readings are compared with the tolerances listed in Table 3
10. T MENU button YES and you can enter a specific menu 3 2 6 4 How to Enter an Individual Menu Item When in any menu a short press on the G N T MENU button YES and you can enter a specific menu item To advance through a given menu make short presses on the PRINT UNITS NO button 3 2 6 5 Howto Save and Store an Individual Menu item When a menu item has been changed once the desired selection is shown make a short press on G N T MENU button Quit appears on the display If NO is selected by pressing the PRINT UNITS button the next menu item appears If yes is selected by pressing G N TMENU StorE appears Pressing the G N T MENU button will store the change and return the scale to a weighing mode If NO is selected the menu change is ignored and the scale is returned to weighing mode 3 2 6 6 How to Quit the Menus A short press on the PRINT UNITS button NO When in MENU MODE short presses will advance through the menus until QUIT is reached To quit make a short press on the G N T MENU button StorE appears answer YES to save changes and scale returns to the weighing mode or NO to ignore changes and return to the weighing mode 3 2 6 7 Calibration Menu II The Calibration menu contains entries for span or linearity IL calibration Function Display Available Settings Application Span Calibration rn Eight calibration values are Calibrate balance full scale in A Bri available for each balance either kg or Ib units Lin
11. a Specific 3 14 3 2 6 3 How to Enter an Individual 3 15 3 2 6 4 How to Enter an Individual Menu ltem 3 15 TABLE OF CONTENTS Cont 3 2 6 5 How to Save and Store an Individual Menu ltem 3 15 3 2 6 0 How to Quit the Menus inet 3 15 3 2 6 7 Calibration dns 3 15 3 16 3 2 6 9 Read o obe dece rite 3 17 3 2 6 10 RS232 1 RS232 2 Meng 3 18 93 2 b TT LOCKOUT Menus ro dee Ses pedit 3 19 9 2 TE EE 3 20 3 2 7 Calibration and Sealing d oe ri eoo Poetis 3 21 3 2 7 1 Calibration oiii e cage Ee 3 21 3 2 7 2 Calibration ProGedlre 3 21 3 2 7 3 Unlocking the MODUS i te hue pone Seed 3 22 3 2 7 4 Weights and Measures 3 23 9 2 8 Performance NOSIS sek 3 24 3 2 8 1 Repeatability ide die eter ibn land 3 24 3 2 8 2 Off Center RE 3 25 9 28 93 Linearlty EE 3 25 3 2 9 RS232 Interface Test undi c ie tld ade 3 27 3 2 9 1 Connecting the RS232 Interface 3 27 932 0 Print EE 3 28 3 2 11 Visilal INSPECCION d iste 3 28 3 3 Repair FIOGOUU I BSc oi iine obedit eie xeu eoi eeh 3 29 3 3 1 Replacing the Keypad Membrane 3 29 3 3 2 Replacing the
12. adjustable fixed not adjustable Cornerload stop fixed notadjustable fixed not adjustable fixed not adjustable fixed not adjustable fixed not adjustable 1 Note on calibration Certified certifiable scales should be calibrated under full load Note on linearity The linearity of certified or certifiable scales must be verified at 2596 5096 7596 and 100 full load Tolerances are given in the following calibration diagrams 4 1 CHAPTER 4 DATA TABLES 4 1 2 Noncertifiable Ranger Scales with Strain Gauge Weighing Cells The following data apply to all noncertifiable Ranger scales with strain gauge weighing cells regardless of platform size Table 4 2 DATA FOR NONCERTIFIABLE RANGER SCALES Scale capacity 9g O Weighing range 1 2 1504 5 3009 3009 6018 6018 15045 15045 35090 30090 60180 Resolution 2 x 3000d 2x3000d 2 x 3000d 2x3000d 2x3000d Certification class Readability weighing range 1 2 g Repeatability g Calibration weight full load kg Calibration weight minimum kg Calibration weight fullload lb Calibration weight minimum 1 Ib Weight class Calibration tolerance g Cornerload test weight Cornerload tolerance g Overload stop fixed not adjustable fixed not adjustable fixed not adjustable fixed not adjustable fixed not adjustable Cornerload stop fixed notadjustable fixed not adjustable fixed not adjustable fixed not adjustable fixed not adjustable
13. for service work or activates the current setting within a block and is therefore equivalent to saying Yes After the desired setting within a block is activated the prompt End appears If you want to quit service mode confirm this with the G N T MENU button If you want to make further settings press the PRINT UNITS to display the next service mode block 3 3 9 4 Service Mode Blocks Service mode comprises the following 9 blocks rnn 3 1 Ramp RMP 2 In this block you can view the signal at the analog digital converter and refresh it by pressing the G N T MENU button as required ramp 0 100 output signal at the A D con verter 2 Serial number SNR This block contains the serial number of the scale The number was assigned atthe factory and should not be altered 3 Weighing range RANGE In this block you can specify the effective weighing range r 4 Geographical location GEO LIE LI In this block you can change the geographical adjustment value of your weighing system to match local gravitational conditions 5 Linearity LIN II In this block you can correctthe linearity error of your weighing system 7 6 Span Calibration SPAN Jr on In this block you can perform span calibration 7 Set preload Set PL re In this block you can set the scale preload 8 Quit service mode END E no This block permits quitting the service mode after setting YES to Span cal
14. halfway to the rear of the Platform and note the reading Move the mass halfway between the center and the left edge front of the Platform and note the reading Repeat this test for the right edge position and note the reading Move the mass halfway to the front of the Platform and note the reading Note any differences in the displayed weight reading at all positions Maximum allowable change is per Table 3 1 for each of the listed scales four positions Move back to center and tare if neccessary after each reading MASS LOCATIONS Figure 3 5 Off Center Load Test Mass Locations 3 2 8 3 Linearity Test The Linearity test is used to determine the linearity of the scale throughout its operating range and is in accordance with the specifications listed in Tables 1 3 through 1 6 NOTE The scale must pass the Off Center Load test and Repeatability Test before the Linearity Test is performed This test is used to determine the linearity of the scale throughout its operating range Table 3 2 lists the suggested masses to be used for checking linearity on each scale model Ifthe unit fails the linearity test check the alignment of the transducer and re assemble Ifthe transducer has been replaced carefully check the alignment TABLE 3 2 LINEARITY TEST MASSES CAPACITY 3Kg Ref Mass 100g Load 1 750g Load 2 1 5kg Load 3 2 250kg Load 4 3kg All masses are nominal values BE CERTAIN TO USE THE SA
15. mode You are now prompted to save the changes Press the G N T MENU button to save the changes or the PRINT UNITS button to cancel the changes made in service mode The scale then reverts to weighing mode Important After you exit from service mode the scale must be switched off and then on again 3 42 CHAPTER 4 DATA TABLES 4 1 INTRODUCTION This section of the manual contains technical data tables for certifiable certified Ranger scales and non certifiable Ranger scales Tables are also included for preload information and geographical adjustment information 4 1 1 Certifiable and Certified Ranger Scales with Strain Gauge Weighing Cells The following data apply to all certifiable or certified Ranger scales with strain gauge weighing cells regardless of platform size Table 4 1 DATA FOR CERTIFIABLE CERTIFIED RANGER SCALES Scale copacity ago so sg 1 eog Weighing range 1 2 1504 5 3009 3009 6018 6018 15045 15045 35090 30090 60180 Resolution 2 x 3000e 2 x 3000e 2 x 3000e 2x3000e 2 x 3000e Certification class Readability weighing range 1 2 9 2 5 Repeatability g Calibration weight fullload1 kg Calibration weight minimum 1 kg Calibration weight fullload Ib Calibration weight minimum 1 Ib Weight class Calibration tolerance g Cornerload test weight Cornerload tolerance g Overload stop fixed not adjustable fixed not adjustable fixed not adjustable fixed not
16. of the scale being used 3 2 7 1 Calibration Masses Before beginning calibration make sure masses are available If you begin calibration and realize calibration masses are not available exit the menu The scale will retain previously stored calibration data Calibration should be performed as necessary to ensure accurate weighing Refer to Tables 1 1 and 1 2 which refer to the calibration points of the scales 3 2 7 2 Calibration Procedure rni NOTE If the scale is sealed and is used for legal for trade the seal LAL must be removed to gain access to the unlock switch located under neath the scale in order to calibrate the scale Access the menu by pressing and holding the G N T Menu button You have a choice of calibrating the scale using span or linearity methods Span calibration requires two points zero and full span Linearity requires three points zero mid range and full span Span Press G N T Menu button 0 is displayed followed by mass value to be placed on the platform For example a 3kg scale would normally require 3kg for span calibration By pressing the PRINT UNITS Ar button repeatealy a lesser value mass can be used For example a 3kg scale offers 2kg 1 5kg 1 2kg 1kg 0 9kg 0 8kg and 0 7kg for full 3 21 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 7 2 Calibration Procedure Cont P us _ 3 2 7 3 Unlocking the Menus span Place the indicated mass on the platform and press the G
17. screws verify that the weighing cell is aligned exactly parallel with the edges of the overload plate Screw torque 10Nm Placethe overload plate with the weighing cell screwed to it in the scale Fit the springs and washers then tighten the screws Fitthe weighing cell cable connector onto the analog PCB pins Replace the bottom plate and the adjustable feet Turnthe scale the right side up replace the pan support plate and secure it with the screws Before finally tightening the screws make sure that the pan support plate is aligned squarely with the scale housing Important screw torque 10Nm Replace the weighing pan Calibrate the scale in service mode and linearize it If a weighing cell with another capacity has been installed the new weighing range must also be selected Note With Ranger scales the cornerload and overload stops are permanently set and do not need to be readjusted 3 35 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 Accessing and Using Service Mode The service mode is part of the software in Ranger scales offering settings and procedures for scale maintenance With certified scales direct access to service mode is blocked 3 3 9 1 Accessing Service Mode with Scales that are not Certified With scales that are not certified service mode can be accessed at any time by pressing the appropriate buttons rnn Hold the PRINT UNITS and TARE buttons down for at least 5 II 2 seconds until the displ
18. 2 4 Error Messages After Service Work Aen 2 3 CHAPTER 3 MAINTENANCE PROCEDURES 3 1 Preventive Kale EEN 3 1 3 1 1 Preventive Maintenance Checker 3 1 SA HEEN Meo Em 3 1 3 2 1 Operall nal TeSt i e HERE Dobis 3 1 3 2 1 1 Segment Display EE 3 1 3 2 2 Men Ee Pici ep 3 2 3 2 8 Ranger Counting Switch Functions 3 6 3 2 4 Ranger Counting Scale Menu 3 7 3 2 4 1 How to Enter the Menus 3 7 3 2 4 2 How to Select a Specific 3 7 3 2 4 3 How to Enter an Individual 3 7 3 2 4 4 How to Enter an Individual Menu ltem 3 8 3 2 4 5 How to Save and Store an Individual Menu ltem 3 8 3 2 4 6 How to Quit the Menus 3 8 3 2 4 7 Calibration Mp ioca io da dT ue s s 3 8 3274 8 Setup MENU Laici o Ede teo e aiat bres 3 9 3 2 4 9 Read EE 3 10 3 2 4 10 RS232 1 RS232 2 Menus 3 11 3 2 4 11 Lockout Menu E 3 13 E ae r ie EE 3 14 3 2 5 Ranger Weighing Scale Switch Functions 3 14 3 2 6 Ranger Weighing Scale Menu Functions 3 14 3 2 6 1 How to Enter the Menus 3 14 3 2 6 2 How to Select
19. APTER 3 MAINTENANCE PROCEDURES 3 2 7 Calibration and Sealing Ranger Counting and Weighing scales offer a choice of two calibration methods Span Calibration and Linearity Calibration Span Span calibration ensures that the scale reads within specifications using two weight values zero and a weight value close to 10096 of the full capacity Special software features enable you to perform a span calibration at a number of lesser values which varies with the model of the scale Linearity Linearity calibration minimizes deviation between actual and displayed weights within the scale s weighing range Three weight values are used zero a weight value at midpoint of the scale s weighing range and a weight value at or near the specified capacity For best results calibrate at or near full capacity Calibration unit can be set to either kg or lb When the scale is used in Legal for trade applications the calibration menu is locked out and is not accessable This is to prevent unauthorized personnel from changing calibration Before beginning calibration make sure masses are available If you begin calibration and realize calibration masses are not available exit the menu with a short press of the ON ZERO OFF button The scale will retain previously stored calibration data Calibration should be performed as necessary to ensure accurate weighing Masses required to perform the procedures should be in compliance with the specification requirements
20. CB Pull off the two spring clips from the analog PCB and remove it Fit the new analog PCB and fix it in place with the spring clips Connect the weighing cell cable the A D cable from the digital PCB and the AC adapter output cable to the analog PCB Replace the bottom plate and the adjustable feet Note After replacing the analog PCB all scale data must be entered again in service mode plus all scale settings Following this the scale must be recalibrated and if necessary linearized 3 3 5 Replacing the Display Mounting Plate Display Unit and Digital PCB The display mounting plate is located underneath the keypad membrane and is located in the scale housing by 6 snaps The display unit comprises the digital PCB the liquid crystal display LCD and the backlighting unit It is held in place on the mounting plate by snaps The digital PCB is connected to the analog PCB and the RS232C interface by two ribbon cables 3 3 5 1 Preliminary Work Unscrew the adjustable feet and remove them Undo the bottom plate retaining screws removing them and the plate itself Undo the retaining screw which fastens the display unit to the mounting plate Pull back the two front cantilever snaps holding the display unit to release it raise the front edge of the display unit and withdraw it from the rear snaps Disconnect the RS232 cable and the connecting cable to the analog PCB from the digital PCB Remove the display unit 3 32 3 3 5 2
21. E E MM OO JJ o oo o A bk MM HA 00 MM m mo M M MM MM Ba ch ch eh E a ae nae ch nn ew non on in in in Oo OO amp gt Go Go lO lO CO OO JJ o Oo Om SS Go Go M M mi OO amp Go Go M MA O JJ Oo Oo PS MM O DO P i00 MM CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 DRAWINGS AND PARTS LISTS This section of the manual contains exploded views and spare parts lists for the Ranger scales The exploded view drawings are designed to identify the replacable parts which can be serviced on the scale in the field The scales are identified as low capacity and high capacity 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 parameters of all applicable specifi cations in this manual If further technical information is needed in the United States call toll free 1 800 526 0659 between 8 00 a m and 4 00 p m EST An Ohaus factory service technician will be available to provide assistance Outside the U S A please contact Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 USA Tel 973 377 9000 Fax 973 593 0359 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 CHAPT
22. ER 5 DRAWINGS AND PARTS LISTS Figure 5 1 Top Components High Capacity Scale Strain Gauge Shown ITEM NO QUANTITY PART NO DESCRIPTION 21203437 Platform 240 x 350 Ranger 12kg 30kg and 60kg 21203073 Rubber shock absorber 21203431 Label Function Ranger Weigh Dry 12kg 30kg and 60kg 21203429 Label Function Ranger Count Dry 12kg 30kg and 60kg CHAPTER 5 DRAWINGS AND PARTS LISTS ITEM NO QUANTITY PART NO DESCRIPTION 21203119 Switch Actuator Ranger Weigh Dry 21203120 Switch Actuator Ranger Count 5 4 CHAPTER 5 DRAWINGS AND PARTS LISTS SCH Se lt a5 T SC j wW fir gt Figure 5 3 Bottom Components High Capacity Scale Strain Gauge Shown 5 5 CHAPTER 5 DRAWINGS AND PARTS LISTS ITEM NO QUANTITY PART NO DESCRIPTION 4 21203434 Feet Ranger 12kg 30kg and 60kg 1 21203151 Load Cell Ranger 12kg 21203152 Load Cell Ranger 30kg 21203153 Load Cell Ranger 60kg 21203167 Cable Analog PCB 300mm Ranger 12kg 30kg 60kg 21203166 Clamp Digital PCB All Ranger Also included in Hardware Kit 212 21203092 PCB Analog All Ranger 21203096 PCB Digital Ranger Weigh Dry 21203098 PCB Digital Ranger Count 5 6 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 4 Power Pack High Capacity Scale Shown ITEM NO QUANTITY PART NO DESCRIPTION 1 21203168 Cable RS232 Internal All Ranger 1 21203184 Double si
23. End of RS232 menu Determines whatis printed via print command Selects a string of data to be printed header gross net tare pieces average piece weight reference count 4 line feed form feed multi or single string per line End of RS232 1 menu when selected display advances to RS232 2 menu End of RS232 2 display advances to LOC menu This menu allows software locking and unlocking the calibration setup read RS232 1 RS232 2 menus Locking is done to limit menu access or for LFT applications Once LocSetis set ON the menu can only be unlocked by a switch on the circuit board of the scale Function Display Available Settings Application Calibration On OFF 3 19 An ON setting locks out the calibration menu An ON setting locks out the setup menu An ON setting locks out the read menu CHAPTER 3 MAINTENANCE PROCEDURES 3 2 6 11 Lockout Menu Cont Function Display Available Settings Application RS232 1 E3323 1 An ON setting locks out f 2L 7 the RS232 1 menu RS232 2 An ON setting locks out n setting IOCKS OU bec d the RS232 2 menu Locks unlocks all of the Lock out menu When set on locks all software settings in this menu LOCSET can only be setto OFF by pressing the UN LOCK switch under the scale End of LOC menu End of menus Yes prompts to store and then ILI IL Will go to a weighing mode No returns to Calibra tion menu 3 20 CH
24. ME REFERENCE MASS THROUGHOUT THE PROCEDURE As close to full capacity as possible while allowing the 100g weight to read 3 25 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 8 3 Linearity Test Cont Before beginning Perform calibration Preliminary Weighings Using the Load 3 and Load 4 weight values Table 3 2 perform some preliminary weighings and make sure the display returns to zero after weighing 1 Place Load 3 on the center of the Platform read the displayed weight then remove Load 3 If the display does not return to zero press ON ZERO OFF and repeat this 2 Repeat step 1 using Load 4 After performing preliminary weighings proceed with checking Linearity If the scale does not return to zero it must be repaired Test 1 Place the reference mass on the center of the Platform and record the exact value all decimal places displayed 2 Remove the reference mass and verify that the display returns to zero If it does not disregard the reading press ON ZERO OFF to rezero the display and take that reading again See note above 3 Place Load 1 on the center of the Platform and press ON ZERO OFF 4 Add the reference mass to the Platform and record the exact value displayed 5 Remove the reference mass and verify that the display returns to zero If it does not disregard the reading press ON ZERO OFF to rezero the display and take that reading again NOTE If after several attempts the display fails to retu
25. N T MENU button If the calibration was successful data is saved automatically Remove calibration masses from platform Linearity When performing a linearity calibration 0 is first displayed fol lowed by the first mass and then a second mass Low Capacity Scale If it necessary to recalibrate a scale which has been set up for legal for trade use or if the menu is locked you will have to remove the seal paper or lead wire at the bottom of the scale to gain access to the unlock switch To unlock the menus turn the scale off On low capacity scales remove the existing seal and four cover screws from the bottom of the scale You will have to unscrew the feet to access the screws Position the scale so the bottom is accessible NOTE Do the next step carefully First press and hold the unlock switch then briefly press the ON ZERO OFF switch atthe same time release the unlock switch while the software version is being displayed LFT is now set to OFF and LOCSET is set to OFF LFT restrictions are no longer enabled and items in the LOC menu may be changed 3 22 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 7 8 Unlocking the Menus Cont High Capacity Scale On high capacity scales remove the existing seal and six cover screws from the bottom of the scale You will have to unscrew the feet to access the screws Position the scale so the bottom is accessible NOTE Do the next step carefully enr 7
26. N50082 1 1 8 CHAPTER 2 TROUBLESHOOTING 2 1 TROUBLESHOOTING This section of the manual specifies problem areas of the scale which can occur Information is contained to isolate specific problems using Table 2 1 Diagnostic Guide and Table 2 2 Error Codes Follow all directions step by step Make certain that the work area is clean and use care when handling components of the scale 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 Follow the symptom column and review the probable cause column and remedy column The probable causes are listed with the most common cause first Ifthe first remedy does notfixthe problem proceed onto the nextremedy Before attempting to repair the scale read all chapters of this manual to familiarize yourself with the scale components and operation Do not attempt repairs unless you fully understand the operation of the scale 2 2 4 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 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 scale 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 interrel
27. Ohaus Corporation 19A Chapin Road Pd Box 2033 Pine Brook NJ 07058 2033 USA OHAUS www ohaus com RANGER COUNTING amp WEIGHING SCALES SERVICE MANUAL Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 973 377 9000 Ohaus Corporation OHAUS SERVICE MANUAL Ranger Counting and Weighing Scales Weighing Scale 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 ofthis material Reproduc tion of this material is strictly prohibited Material in this manual is subject to change Copyright 2001 Ohaus Corporation all rights reserved Registered trademark of Ohaus Corporation TABLE OF CONTENTS CHAPTER 1 INTRODUCTION Page 1 1 Overview of Ranger Counting Scale Controls 13 1 2 Overview of Ranger Weighing Scale 1 3 1 3 te iere EE 1 4 1 4 Service e E 1 4 1 5 Tools and Test Equipment Required 1 5 1251 Special te 1 5 1 5 2 Standard Tools and Test Equipment 1 5 1 6 Test Masses Required e Ee ur aun e 1 5 17 e Mee 1 6 CHAPTER 2 TROUBLESHOOTING a t a a r A E T 2 1 22 Diagnostic Guide Table EE 2 1 22 Le ne 2 1 de EE 2 3
28. RANGER COUNTING SCALE CONTROLS Cont Scale 18 Weighing range display for dual range Keypad scales Function keys 19 Symbols for net gross weight Display 20 Battery discharge status optional battery Scale specifications 21 Weighing unit Weighing pan 22 Number of user selected reference pieces Power cord 23 Weighing range bar graph Power cord with AC Adapter Scale with 24 Center of zero indicator internal battery optional Adjustable feet Function keys 25 Clear APW and return to weighing Rear of scale 26 Average Piece Weight one piece refer 9 Jack for AC Adapter battery option ence weight is displayed for 3 seconds 10a Serial label Europe 27 If RS is set to reference or bulk mode this 10b Serial label USA under weighing plat button switches the display between the form host scale andthe remote scale Tare Zero Hole for antitheft device and G N T buttons functions are active for Spirt level the scale being displayed RS232 Interface Optional 28 Switch between Weighing and Counting RS232 Interface Standard Modes 29 Used for a sample size of 10 pieces Display 30 Continuous press scrolls through 5 15 EES 20 25 30 50 and 100 pieces sample size 16 Active interface for menu mode Short press take sample size as indicated 17 Active scale in 2 scale systems CHAPTER 1 INTRODUCTION 1 2 OVERVIEW OF RANGER WEIGHING SCALE CONTROLS
29. RROR MESSAGES AFTER SERVICE WORK In addition to the errors described in the operating instructions the following error messages may also appear after carrying out service work Error 6 Error 53 No calibration This error only occurs after reinitializing the EEPROM i e after rectifying Error 53 Remedy recalibrate the scale in service mode Invalid data in EEPROM checksum error This error message indicates defective type data in the EEPROM Remedy Completely reset the scale by holding down the PRINT UNITS button Flush appears in the display The scale restarts and then indicates Error 6 Re enter the type data weighing range serial number geographical adjustment value in service mode and save them Access service mode again and then calibrate and linearize the scale CHAPTER 2 TROUBLESHOOTING 2 4 CHAPTER 3 MAINTENANCE PROCEDURES 3 1 PREVENTIVE MAINTENANCE Ohaus scales are precision instruments and should be carefully handled stored in a clean dry area which is dust free and cleaned periodically It is recommended that when a scale has had chemicals or liquids spilled on it the scale should be cleaned as soon as possible Use warm water on a damp cloth to clean all exterior surfaces Do not leave a mass on the scale when not in use When moving the scale from a storage area which is at a different temperature than the area where itis to be operated allow sufficient time for the scale s mechanism to temperature stabi
30. Scale Strain Gauge Shown 5 11 CHAPTER 5 DRAWINGS AND PARTS LISTS ITEM NO QUANTITY 4 PART NO 21203434 21203143 21203144 21203164 21203166 21203092 21203096 21203098 DESCRIPTION Feet Ranger 3kg and 6kg Load Cell Ranger 3kg Load Cell Ranger 6kg Cable Analog PCB 110mm Ranger 3kg 6kg Clamp Digital PCB All Ranger Also included in Hardware Kit 212 PCB Analog All Ranger PCB Digital Ranger Weigh Dry PCB Digital Ranger Count 5 12 CHAPTER 5 DRAWINGS AND PARTS LISTS ITEM QUANTITY PART NO DESCRIPTION 1 21203168 Cable RS232 Internal All Ranger 1 21203184 Double sided tape All Ranger 16 1 21203122 AC Adapter US Plug All Ranger 6 1 1 21203123 AC Adapter US Plug All Ranger 21203124 AC Adapter US Plug All Ranger 16 1 16 1 21203126 AC Adapter US Plug All Ranger 5 13 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 2 MISCELLANEOUS PARTS ITEM QUANTITY PART NO DESCRIPTION 999 1 21203232 Replacement 12v Battery All Ranger 1 21203105 Replacement 12V Battery Charging PCB All Ranger 21203404 Hardware Kit All Ranger Includes countersunk torx screw M3 x 8 countersunk torx screw M3 x 10 countersunk torx screw M6 x 30 countersunk torx screw M4 x 10 button head torx screw M3 x 6 button head torx screw M4 x 12 button head torx screw M5 x 12 wide flange washer 4 3 x 20 wide flange washer 5 3 x 20 countersunk torx
31. Verify communication param eters set up incorrectly eters Improper or loose cable con Check cable connections nections Unable to calibrate unit Incorrect value for calibration Usecorrectcalibration mass mass Lockout menu CAL set to ON Set CAL to OFF in LOC menu LFT set ON Set LFT to OFF CHAPTER 2 TROUBLESHOOTING 2 3 ERROR CODES This scale is equipped with software which will display an error condition when it occurs When a problem occurs using the scale the display will indicate an error code Review the listed codes and follow instructions to correct the problem Table 2 2 Error Codes describes the various error codes which can appear on the display and specifies the probable reason and remedy TABLE 2 2 ERROR CODES The following list describes the various error codes and which can appear on the display and the suggested remedy Error 1 Error 2 Error 3 Error 4 Error 5 Error 6 Error 9 Error 53 Indicates an overload condition Indicates an underload condition Average piece weight too small Reference weight too small The weight on the platform is too small to define a valid reference weight for counting scale No valid reading from second scale When parts counting with a two scale system communications lost Scale needs calibration Unstable weight reading when defining the reference weight EEPROM checksum error Busy tare zero printing Function not executed 2 4 E
32. alog disp 2 ref 2 bulk 2 Rg932 Print print on stability When LFT is set to ON or CAN the Print and cont modes are not available and the default mode for res rs becomes stb only stability only continuous dia log interface disp 2 reference 2 bulk 2 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation Cont 3 2 4 10 RS232 1 RS232 2 Menus Cont Function Display Available Settings Application Baud Rate 300 600 1200 2400 4800 Various baud rates are avail 9600 19200 ableto match external equip ment communication re quirements 7 Even 7 No P 8 No P 7 Various parity settings are Odd available to accommodate ex ternal equipment require ments Two stop settings 1 or 2 are available to accommodate ex ternal equipment require ments Handshake Software handshaking en Hdn d d h abled disabled SEET Header Gross Net Tare Determines whatis printed via GEESE PCS APW RefCT 4Linf print command Selects a F feed LN for string of data to be printed header gross net tare pieces average piece weight reference count 4 line feed form feed multi or single string per line End Settings r E fe End of RS232 menu End of RS232 1 menu when selected display advances to RS232 2 menu End of RS232 2 display advances to LOC menu 3 12 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation Cont 3 2 4 11 Lockou
33. ange as the calibration unit Graduation H n i 0 001 0 002 0 005 0 0001 This isthe graduation size and Jr nu 0 0002 0 0005 available options vary with the capacity of the scale Application noo Stand Standard Regular weighing IL IL FILL Filling Dispensing or filling applica tions Back Light BE Back light can turned on or off b LL Auto optimization III Automatically updates the me LIF LL sample weight Counting only 3 9 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation Cont 3 2 4 8 Setup Menu Cont Function Display Available Settings Application Auto aao ON Calculates the minimum refer H Li Id ence sample for the most accu rate counting Prints a setup list to the RS232 when Mode is set to PRINT on Stability or Stable Only End ux End of setup menu End of setup menu When selected by pressing G N T MENU button display ad vances to READ MENU 3 2 4 9 Read Menu E ef The Read menu contains entries for reset averaging level unit 1 unit 2 auto zero auto tare auto power off retain zero data and end See table below for details Bold equals factory default settings Function Display Available Settings Application reset rd Press G N T MENU reset all menu items to their factory set tings Press PRINT UNITS NO advances to next menu Averaging level Bi Low Med High Averaging level IL High
34. arity Parity ON OFF 7 even 7 no p even 7 no p quit 8 no p 7 odd 8 no p 7 odd RS232 2 i quit ON OFF quit Locset ON OFF quit Endloc quit LON OFF Gross LON OFF Net LON OFF Tare LON OFF 4 L INF LON OFF F Feed LON OFF LN For Single multi End rs1 F Feed LON OFF LN For Single multi End rs1 Figure 3 3 Ranger Weighing Scale Menus Sheet 2 of 2 3 5 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 2 Menu Structure Cont Display Display SELECT SELECT START START Duty Cycle Edit S N RANGE GEO LIN CAL SPAN CA FACTOR Figure 3 4 Ranger Service Menu Structure 3 2 3 Ranger Counting Switch Functions There are two sets of button switches located on the front panel of the Ranger Counting Scale The six button switches located directly under the display are used for counting functions The four button switches located below the six switches provide basic scale operation and menu setups Please read the following information before pressing any of these buttons Scale Sample Sample Select 10 Size BUTTONS FUNCTION Short press Average Piece Weight APW is cleared and scale returns to weighing mode Short press Average Piece Weight one piece reference weight is displayed for 3 seconds Scale Switches the display between scale 1 host and scale 2 remote If 2 scales are Select connected the functions zero G N T amp tare will be executed on the scale that is currently on the ho
35. ase is made of plastic do not apply excessive pressure to the battery Remove two connectors from the battery terminals The old battery should be sent to an appropriate recycling center Remove one side of protective covering from a new adhesive patch The adhesive patch is the same as that used for mounting of an internal power pack The patch is applied to the side of battery where the manufacturer information is printed This should also be the side closest to power terminals Center the patch on the battery with the long edge of the patch aligned with the upper long edge of the battery case the stepped edge Setthe new battery to the side of the housing with the adhesive patch side facing away from the housing and the positive terminal of battery towards the rear of the scale Attach the Red wire s connector to the positive terminal of battery attach the Blue wire s connector to the negative terminal of battery 3 30 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 3 Replacing the Internal Rechargeable Battery Cont The battery is installed against the inner housing wall that encloses the transducer compart ment The battery is installed terminal side first with the positive terminal of battery towards the rear of the scale Remove the remaining covering from the adhesive patch As the battery is first lowered into the housing lightly pull the red and blue wires straight back along the outer edge of te
36. ated 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 scale 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 6 00 p m EST 2 1 CHAPTER 2 TROUBLESHOOTING TABLE 2 1 DIAGNOSTIC GUIDE SYMPTOM PROBABLE CAUSE S REMEDY Unit will not turn on Not pluggedin orproperlycon Check power cord connec nected tions Battery operation battery dead Check battery charge bat or not fully charged tery Membrane switch failure Check functions of membrane switch Cannot zero scale or will not Load on scale exceeds allow Reduce load on scale to less zero when turned on able zero than current amount Platform unsteady Remove source of vibration Center of Zero display erratic Scale platform motion or dis Remove external distur or does not appear with no turbances exceed center of bances or reduce motion load on platform zero criteria Increase AZT level in read out menu Increase averaging level in readout menu Cannot display weight de Desired unit not set to ON in Enable desired unit in Read sired weighing unit Read menu menu RS232 not working RS232 communication param
37. ay advances to Span calibration The previously stored information for linear calibration remains in the scale 3 40 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 5 Working in Service Mode Cont Calibration As well as calibration itself the preload is specified in this block Calibration in service mode does not involve a plausibility check for the calibration weight used but always accepts the load placed on the pan as correct Calibration in service mode also serves as a reference for calibration in the operational mode i e faulty calibration in service mode automatically results in the load placed on the scale in operational mode calibration being interpreted incorrectly Important Before starting calibration Check the Read menu and make sure that Retain Zero is set OFF If Retain Zero was set ON in the beginning turn back ON for end user after completing this procedure e Press the G N T MENU button if you want to calibrate the scale You are now prompted by the display to place the preload on the scale If you want to specify a certain preload for example a weighing container to be used L permanently place this on the platform see table 3 for accepable preload values Regardless of whether you place a preload on the scale or not now press the G N T MENU button to start the calibration procedure While the zero point is being determined raw values of weight appear in the display this may take a fe
38. ay shown atleftappears This isthe Ramp Ramp Display display in the service menu 3 3 9 2 Accessing Service Mode with Certified Scales With certified scales or certifiable scales direct access to service mode by pressing the PRINT UNITS and TARE buttons is blocked This is for technical reasons and also to comply with regulations To access service mode proceed as follows e Switch off the scale Remove the scale bottom plate by removing the 4 Torx TX20 retaining screws Important In orderto remove the bottom plate itis necessary to breakthe certification seal affixed to it Once this seal has been destroyed the scale must be recertified by an accredited organiza tion and a new certification seal must be affixed before the instrument may be used as a certified scale again Hold down the unlock switch pushbutton on the analog PCB indicated in the drawings below while at the same time switching on the scale Keep the unlock switch pressed in until display indicates the software revision Large Platform Model Small Platform Model Unlock Switch Figure 3 7 Unlock Switch Locations 3 36 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 3 Accessing Service Mode Service mode is accessed using the PRINT UNITS and TARE buttons PRINT UNITS skips the displayed block or the displayed setting within a block and causes the next block or setting to appear It is equivalent to saying No G N T MENU selects the displayed block
39. berabove General Specifications Platform size w x d in cm 14 x9 5 35 x 24 Scale dimensions w x d x h in cm 14 2 x 14 6 x 45 36x37 x115 Shipping dimensions w x d x h in cm 20 20 5 x 10 5 52 x53 x 27 Weight Ib kg 2119 5 24 11 gross Weighing units g kg Ib oz Display 0 63 inch 16 mm digit height BacklitLCD Power Internal power supply 40 hour rechargeable battery powered models available Span Calibration 25 100 capacity Linearity Calibration 3 pointcalibration 0 5096 10096 capacity Auto Zero Tracking 0 5d 1d 3d OFF Construction Stainless steel weighing pan Painted cast aluminum housing Protection IP 43 Operatingtemperature Standard models 10 C to 40C Storage temperature 20 C to 60 C CHAPTER 1 INTRODUCTION 17 SPECIFICATIONS Cont Models WEIGHING Cap x Readabi Cap x Readab Cap x Readab TABLE 1 5 RANGER COUNT OIML VERSION SPECIFICATIONS RANGE 30x 0 01 30000x 10 60 x 0 02 30 x 0 02 60 0 02 60x0 02 120x0 05 120x0 05 300 x 0 2 300x0 2 700x0 2 600 x 0 2 Range 2 60 x 0 02 60000x20 120 x0 05 1200 x 0 5 General Specifications Large Platform Platform size w x d cm 35x24 Scale dimensions w x d x h cm 36x37 x11 5 Shipping dimensions w x d x h cm 52 53 27 Weight ky 9 5 net 11 gross Weighing units g kg Ib oz Display 0 63 inch 16 mm digit height Backlit LCD Power In
40. ces CHAPTER 1 INTRODUCTION 1 5 TOOLS AND TEST EQUIPMENT REQUIRED In order to properly service the Ohaus Ranger Scales a standard electronic tool kit is required No special tools and test items are required 1 5 1 1 5 2 1 6 TEST MASSES REQUIRED Special Tools None required Standard Tools and Test Equipment 1 Digital Voltmeter DVM Input impedance of atleast 10 megohms in the 1 Volt dc position 2 Torx screwdrivers TX8 TX20 TX30 and TX50 The masses required to test the Ohaus Ranger Scales must meet the requirements of ASTM Class 4 Tolerance The mass values are listed in Tables 1 1 and 1 2 TABLE 1 1 RANGER CALIBRATION MASSES KG TYPE MODEL capacity SPAN LINEARITY NOTES Weighing SG Weighing SG Weighing SG Weighing SG Weighing SG Weighing SG Weighing SG RD3RS RD6RS RD12LS RD12LS RD30LS RD30LS RD60LS Single Range NTEP Dual Range OIML Single Range NTEP Dual Range OIML Single Range NTEP TABLE 1 2 RANGER CALIBRATION MASSES LB Weighing SG Weighing SG Weighing SG Weighing SG Weighing SG Weighing SG Weighing SG RD3RS RD6RS RD12LS RD12LS RD30LS RD30LS RD60LS TYPE MODEL CAPACITY SPAN LINEARITY NOTES Single Range NTEP Dual Range OIML Single Range NTEP Dual Range OIML Single Range NTEP 1 5 CHAPTER 1 INTRODUCTION 1 7 SPECIFICATIONS Complete specificatons for the Ohaus Ranger Counting and Weighing Scales are liste
41. city mm cell no load plate weighing plate support preload switch on zero support pan and weighing reserve 18 of weigh pan ing range SM small 200 x 240 mm 21203143 0 340 kg 0 500 kg 0 840 kg 0 62 kg 0 54 kg SM small 200 x 240 mm 21203144 0 340 kg 0 500 kg 0 840 kg 2 08 kg 1 08 kg SM small 200 x 240 mm 21203145 0 340 kg 0 500 kg 0 840 kg 1 46 kg 2 70 kg LA large 240 x 350 mm 21203150 0 820 kg 0 850kg 1 670 kg 1 25 kg 1 08 kg LA large 240 x 350 mm 21203151 0 820kg 0 850kg 1 670 kg 0 63 kg 2 70 kg LA large 240 x 350 mm 21203152 0 820 kg 0 850kg 1 670 kg 7 03 kg 6 30 kg LA large 240 x 350 mm 21203153 0 820 kg 0 850kg 1 670 kg 27 53 kg 10 80 kg 4 3 CHAPTER 4 DATA TABLES 4 1 4 Geographical Adjustment Values TABLE 4 4 RANGER GEOGRAPHICAL ADJUSTMENT VALUES Geographical latitude in 650 975 1300 1625 1950 2275 2600 2925 3250 the northern or southern Elevation above sea level in feet hemisphere in degrees 0 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 0 0 5 46 4 3 1 1 0 5 46 9 52 9 2 12 44 12 44 15 6 15 6 17 10 17 10 19 2 19 2 20 45 20 45 22 22 22 22 23 54 23 54 25 21 25 21 26 45 26 45 28 6 28 6 29 25 29 25 30 41 30 41 31 56 31 56 33 9 33 9 34 21 34 21 35 31 35 31 36 41 36 41 37 50 37 50 38 58 38 58 40 5 40 5 41 12 41 12 42 19 42 19
42. cted in the factory Normally repeat linearization is only necessary after replacing the weighing cell or changing the weighing range A3 point linearization procedure is available in the scale the set calibration points being at 0 50 and 100 of the weighing range These can be changed however if the required weights are not available e Press the G N T MENU button if you want to linearize the scale The flashing 0 display prompts you to remove the load from the weighing pan Once this is done zero point calibration is carried out automatically e The second calibration point e g 1 5kg for a 3 kg scale now appears in the display If you have this weight available place it on the scale If not you can use the PRINT UNITS button to change the calibration point and then place the corresponding weight on the scale Cali bration is then carried out after the G N T MENU button is pressed The third calibration point e g 3kg for a 3kg scale then appears in the display This value can also be changed with the PRINT UNITS button if necessary Place the appropriate weight on the scale Calibration is again carried out after the G N T MENU button is pressed The message done appears in the display indicating that the linearization procedure has been successfully con cluded Note If the Linearity calibration is not carried out within 30 seconds of starting a message declaring abort appears breifly then the displ
43. d in Tables 1 3 through 1 6 When a scale has been serviced it must meet the specifications listed in the table Before servicing the scale determine what specifications are not met TABLE 1 3 RANGER COUNT NTEP VERSION SPECIFICATIONS RD3RS wen RDI2IS wans RD6OLS 6x0 0005 12x0 001 24 x 0 002 60 x 0 005 Standard Models NTEP Default Capacity x Readability Ib DefaultC apacity xR eadability kg DefaultC apacity x Readability g DefaultC apacity x Readability oz TEP Capacity x Readability Ib TEP Capacity x R eadability kg TEP Capacity x R eadability g TEP Capacity x R eadability oz Linearity g Order number Note NTEP for weighing only Platform size w x d in cm Scale dimensions w x d x h in cm Shipping dimensions w x d x h in cm Weightlb kg Weighing units Display Power Span Calibration Linearity Calibration 3 pointcalibration Auto Zero Tracking Construction Protection Operatingtemperature Storage temperature 3x0 0002 6x 0 0005 12 x 0 001 30 x 0 002 3000 x 0 2 6000 x 0 5 12000 x 1 30000x 2 60x0 005 120x0 01 240 x 0 02 600 x 0 05 RD3RS 2EO RDGRS 2EO RDI2LS 2EO RD3OLS 2E0 General Specifications AII Models 120 x 0 01 60 x 0 005 60000 x 5 1200 x 0 1 60 x 0 01 120 x 0 02 60 x 0 01 60000 x 10 1200 x 0 2 5 0 RD6OLS 2E0 14x 95 35 x 24 14 2 x 14 6 x 4 5 36 x 37 x 1 5 20 x 20 5 x 10 5 52 x 53 x 27 21 9 5net 24 11 gross g kg Ib
44. ded tape All Ranger 1 21203122 AC Adapter US Plug All Ranger 1 21203123 AC Adapter US Plug All Ranger 6 1 6 1 21203124 AC Adapter US Plug All Ranger 6 1 1 1 21203126 AC Adapter US Plug All Ranger 5 7 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 5 Weigh Display Figure 5 6 Count Display ITEM NO QUANTITY PART NO DESCRIPTION 7 1 21203119 Switch Acutator Ranger Weigh Dry 7 1 21203120 Switch Acutator Ranger Count 18 1 21203134 LCD Ranger Weigh Dry 18 21203135 LCD Ranger Count 19 21203136 Backlighting Ranger Weigh Dry 19 21203137 Backlighting Ranger Count NOTE The above parts list applies to High and Low capacity models 5 8 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 7 Top Components Low Capacity Scale Strain Gauge Shown ITEM NO QUANTITY PART NO DESCRIPTION 21203438 Platform 200 x 240 Ranger 3kg and 6kg 21203073 Rubber shock absorber 21203432 Label Function Ranger Weigh Dry 3kg and 6kg 21203430 Label Function Ranger Count Dry 3kg and 6kg 5 9 CHAPTER 5 DRAWINGS AND PARTS LISTS Figure 5 8 Switch Actuators Low Capacity Scale Shown ITEM QUANTITY PART NO DESCRIPTION 21203119 Switch Actuator Ranger Weigh Dry 21203120 Switch Actuator Ranger Count 5 10 CHAPTER 5 DRAWINGS AND PARTS LISTS n I Arg N 79 WW MEJ j d SS LS E 2 Figure 5 9 Bottom Components Low Capacity
45. e LON OFF Single multi End rs1 S232 2 2 reset LYES NO Mode Print On Stb Stb only Cont Dialog Disp 2 Ref 2 Bulk2 quit baud 300 600 1200 2400 4800 9600 19200 quit Parity 7 even 7 no p 8 no p 7 odd quit Stop pue quit Handsh pies ND quit Defstr Header LON OFF Gross LON OFF Net LON OFF Tare LON OFF LN For L Single multi End rs2 Loc Cal LON OFF quit Setup CH OFF quit Read ON OFF quit RS232 1 OFF quit RS232 2 ON OFF quit Locset ON OFF quit Endloc Store Quit LStore Figure 3 2 Ranger Counting Scale Menus Sheet 2 of 2 3 3 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 2 Menu Structure Cont 5096 capacity weight 10096 capacity weight done 0 0005 0 001 Unit 115 Unit 1g Unit 1kg EndCAL 0 002 0 005 Unit 1 0 quit Unit 2 Unit 215 Unit 2g Unit 2kg Unit 2 92 Hidden when LFT is ON J Can be viewed but not changed when LFT is ON Figure 3 3 Ranger Weighing Scale Menus Sheet 1 of 2 3 4 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 2 Menu Structure Cont 5232 1 5292 2 Loc Quit reset Cal LStore reset Lreset rs Mode Print On Stb Stbonly Lreset rs Mode LON OFF quit Setup Print On Stb Stbonly Cont Dialog Disp 2 Cont Dialog Disp 2 ON OFF quit Read 300 600 1200 2400 300 600 1200 2400 CH OFF Es 9600 19200 Gen 9600 19200 quit quit quit RS232 1 P
46. e display unit and withdraw it from the rear snaps Disconnect the RS232 cable and the connecting cable to the analog PCB from the digital PCB Remove the display unit Remove the EPROM from its socket using a special tool Fit the new EPROM Note the chamfered corner of the EPROM must be oriented towards the chamfered corner of the socket marked with an arrowhead Connect the RS232 cable and the cable from the analog PCB to the digital PCB Engage the display unit under the rear snaps of the display mounting plate and then lower its front edge until it snaps into place Fit the retaining screw Replace the bottom plate and adjustable feet 3 3 8 Replacing the Weighing Cell 3 3 8 1 Replacing a Strain Gauge Weighing Cell Remove the Platform Undo the platform support plate retaining screws and remove the platform support plate Turn the scale upside down unscrew the adjustable feet and remove them 3 34 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 8 1 Replacing a Strain Gauge Weighing Cell Cont Undo the bottom plate retaining screws removing them and the plate itself e Remove the weighing cell cable connector from the analog PCB Undo the 4 retaining screws for the overload plate Remove the screws washers and springs e Remove the overload plate with the weighing cell screwed to it Remove the weighing cell retaining screws e Screwthe new weighing cell to the overload plate Important Before tightening the
47. eached To quit make a short press on the G N T MENU button StorE appears answer YES to save changes and the scale returns to the weighing mode or NO to ignore changes and return to the weighing mode 3 2 4 7 Calibration Menu m The Calibration menu contains entries for span or linearity J L calibration Function Display Available Settings Application Span Calibration rn Eight calibration values are Calibrate balance full scale in Ar cfi available for each balance either kg or Ib units Linearity Calibration L Zero mid range and full Three point calibration for L Ifi scale calibration points maximum accuracy End Calibration mE m Displays after successful cali Signifies end of calibration C bration 3 8 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation Cont 3 2 4 8 Setup Menu BEI nn The Setup menu contains entries for LFT calibration units cur graduations processing back light list and end set See table below for details Bold equals factory default settings Function Display Available Settings Application res sp Press G N T MENU reset all menu items to their factory set tings Press PRINT UNITS NO advances to next menu I LI Legal for trade applications LFE when set ON or CAN Legal for trade Calibration unit FD I Kg default for dual range Either kg or Ib can be selected LHL uri Ib default for single r
48. earity Calibration 7 L Zero mid range and full Three point calibration for L Ifi scale calibration points maximum accuracy End Calibration r reo Displays after successful cali Signifies end of calibration J E bration 3 15 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 6 Ranger Weighing Scale Menu Functions Cont 3 2 6 8 Setup Menu CELD The Setup menu contains entries for LFT calibration units JCE LIF graduations processing back light list and end set See table below for details Bold equals factory default settings Function Display Available Settings Application res sp Press G N T MENU reset all menu items to their factory set tings Press PRINT UNITS NO advances to next menu Legal for trade Lr OFF Legal for trade applications en ON when set ON or CAN CAN Calibration unit Fn 11 Kg default for dual range Either kg or lb can be selected LOL un lb default for single range as the calibration unit Graduation nag 0 001 0 002 0 005 0 0001 0 0002 0 0005 Thisisthe graduation size and available options vary with the capacity of the scale Application pool Ir Stand Standard Regular weighing IL IL FILL Filling Dispensing or filling applica tions Back Light or 11 Back light can turned on or off bHL LE Allows printing of complete scale setup End Settings End of setup menu When se r End of setup menu lected by pressing G N T L MENU b
49. ears in the display in addition to the weighing range the scale is a dual range type If the weighing range is changed this setting must be saved before calibration is carried out otherwise the calibration proce dure will use the previous settings To save the setting confirm the new weighing range then respond to both prompts End and Store by pressing G N T MENU button The scale then restarts ren Setting geographical adjustment value Europe only LI E LI In this block you can set the geographical adjustment value and thus adapt the scale to local gravitational conditions Please only change this setting if you are certain of the correct geographical adjustment value Pressthe G N T MENU button to display the current geo graphical adjustment value Then press the PRINT UNITS buttonto change it Each time the button is pressed the next value is displayed range of settings 0 31 Please refer to the table 3 to find the appropriate geographical adjustment value Confirm the selected value by pressing the G N T MENU button in 3 39 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 5 Working in Service Mode Cont r 4 Correcting linearity errors Correct calibration ensures that the displays at the zero point and the calibration point correspond exactly to the loads placed on the scale Ideally this should be the case over the entire weighing range Any linearity error is corre
50. ed and displayed breifly then the model number of the scale followed by a software revision number This is a segment display test Figure 3 1 is a full display test Dew XFInnrr T ner sick Pcs E 26 sies aec casis aac ilta Auto SRI Weighing Display Counting Display Figure 3 1 Segment Displays 3 1 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 2 Menu Structure Programmable features of the Ranger Scales are contained in menus which are accessed through the front panel control switches Figure 3 2 illustrates the Ranger Counting Scale Figure 3 3 illustrates the Ranger Weighing Scale Figure 3 4 illustrates the service menu structure full capacity weight done 5096 capacity weight 100 capacity weight done Unit 18 Unit 1g Unit 1kg EndCAL 0 0005 0 001 Unit 1 97 0 002 0 005 quit 0 0001 0 0002 Unit 2 i Unit 215 Unit 2g Unit 2kg Unit 2 0 quit Azt 0 5d 1d 3d OFF C Hidden when LFT is ON Can be viewed but not changed when LFT is ON Figure 3 2 Ranger Counting Scale Menus Sheet 1 of 2 3 2 3 2 2 Menu Structure Cont CHAPTER 3 MAINTENANCE PROCEDURES rs232 1 reset LYES NO Mode Print On Stb Stb only Cont Dialog Disp 2 Ref 2 Bulk2 quit baud 300 600 1200 2400 4800 9600 19200 quit Parity 7 even 7 no p 8 no p 7 odd quit Stop 1 2 quit Handsh YES NO quit Defstr Header ON OFF Gross LON OFF Net LON OFF Tar
51. g OIML 30kg 35kg and 60kg Ranger Weighing Scales small platform capacities 3kg and 6kg Ranger Weighing Scales large platform capacities 12kg NTEP 15kg OIML 30kg NTEP 35kg OIML and 60kg The contents of this manual is contained in five chapters Chapter 1 Introduction Contains information regarding service facilities tools and test equipment test masses and specifications Chapter 2 Troubleshooting Contains a diagnosis diagnostics chart and error code table Chapter 3 Maintenance Procedures Contains preventive maintenance procedures performance tests and adjustments repair procedures service mode procedures and calibration procedures Chapter 4 Drawings and Parts Lists Contains exploded views of Ranger Scales identifying all serviceable replacement components with parts lists Before servicing the scale you should be familiar with the Instruction Manual which is packed with every Ranger Scale 1 4 SERVICE FACILITIES To service the Ohaus Ranger Scale the service area should meet the following requirements DO NOT SERVICE the scale Next to open windows or doors causing drafts or rapid temperature changes Near air conditioning or heat vents Near vibrating rotating or reciprocating equipment Near magnetic fields or equipment that generates magnetic fields On an unlevel work surface Allow sufficient space around the instrument for ease of operation and keep away from radiating heat sour
52. ger Counting Scale Menus sese 3 2 3 3 Ranger Weighing Scale Menus ee 3 4 3 4 Ranger Service Menu Structure EE 3 6 3 5 Off Center Load Test Mass Locations 3 25 3 6 5232 Interface Pin Connections un 3 27 3 7 Unlock Switeh LOCATIONS keete eer 3 34 5 1 Top Components High Capacity Scale Strain Gauge Shown 5 3 5 2 Switch Actuators High Capacity Scale Strain Gauge Shown 5 4 5 3 Bottom Components High Capacity Scale Strain Gauge Shown 5 5 5 4 Power Pack High Capacity Scale 5 7 5 5 lide mile EE 5 8 5 6 enr pm 5 8 5 7 Top Components Low Capacity Scale Strain Gauge Shown 5 9 5 8 Switch Actuators Low Capacity Scale Shown 5 10 5 9 Bottom Components Low Capacity Scale Strain Gauge Shown 5 11 5 10 Power Pack Low Capacity Scale Shown 5 13 CHAPTER 1 INTRODUCTION 1 1 OVERVIEW OF RANGER COUNTING SCALE CONTROLS a CITI CICI H TUER SILICI CICCI LI eee fete Auto Opt E A CHAPTER 1 INTRODUCTION 1 1 OVERVIEW OF
53. greater stability Med mid stabilty Low less stability faster processing time Unit 1 T L 9 kg oz Ib This is the first weighing unit 1 Unit 2 SI g kg oz Ib This is the alternate weighing Lf iE unit CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation Cont 3 2 4 9 Read Menu Cont Function Display Available Settings Application Auto Zero Tracking on 0 5d 1d 3d Off Settings minimize effects oftem perature and small distur bances on the zero reading Auto Tare ni Enables automatic tare when set to ON Auto Power Off When set YES scale turns off Dm nue after 5 minutes NOTE Defaultis YES if battery option is installed else NO Retain Zero Data 1 Retains stored zero point when scale is turned off End Settings C_J End of read menu End of Read menu when se lected display advances to RS232 1 menu 3 2 4 10 RS232 1 RS232 2 Menus p The RS232 1 menu provides the communication settings to port racc 1 standard RS232 2is Port 2 which is an option and has exactly the same settings Bold equals factory default settings Function Display Available Settings Application reset rs Press G N T MENU reset all menu items to their factory set tings Press PRINT UNITS NO advances to next menu Print on stb stb only cont Selects mode of operation for di
54. ibration E r 3 9 Store service mode settings Store St ore Selecting this block permits storing the settings made in service mode 3 37 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 5 Working in Service Mode Settings in service mode may only be made by qualified personnel The wrong settings could result in the scale not functioning correctly CDR 3 Viewing the A D converter signal ramp Fg IF In this block you can view the signal at the internal analog digital converter enabling you to check the converter and the weighing cell for good working order The signal is not influenced by any service mode setting current output signal at the A D converter as a percentage of full scale appears directly in the display It is a static display Scales with identical correctly functioning weighing cells the same preload and the same weighing range have approximately the same output signals As the weight increases the ramp value increases linearly with the weight in 96 e To quit this block press the PRINT UNITS button The next service mode block SNR then appears Enr Viewing or changing the serial number NIME In this block you can view or change the scale serial number Press the G N T MENU button to display the serial number Itis only necessary to change this number after replacing the analog PCB or rectifying Error 53 The serial number is given on the scale model label rut Lu I Lu I L1
55. indow in the keypad membrane then peel off the protective film from the new membrane and carefully affix the latter to the display mounting plate Press the keypad membrane down uniformly 3 3 2 Replacing the AC Adapter Note The AC adapter has a fuse as overcurrent protection For safety reasons this fuse cannot be replaced and the AC adapter must therefore be replaced completely if the fuse blows This applies only to scales that are connected directly to the AC power line without rechargeable battery and external AC adapter Unscrew the adjustable feet and remove them Undo the bottom plate retaining screws removing them and the plate itself Disconnect the AC adapter cable from the analog PCB e Remove the AC adapter held on by an adhesive patch from the wall of the housing If necessary carefully insert a flat blade knife or screwdriver between adapter and housing and pry them apart Remove all traces of adhesive from the housing Undothe 4 screws holding the blanking plate in place rear panel of scale and remove the plate Slidethe AC adapter power cord grommet out of the blanking plate Remove the AC adapter from the scale Place the new AC adapter in the scale and fix it in place with a new adhesive patch Slide the power cord grommet into the blanking plate slot and screw the plate in place Plug the AC adapter output cable onto the analog PCB Replace the bottom plate and the adjustable feet
56. ing unit are flush Use a flat object such as a ruler to exert a uniform pressure on the LCD and gently push it home Push the backlighting unit ribbon cable connector onto the digital PCB pins Replacing the Digital PCB Remove the LCD and backlighting unit as described in the previous subsection Remove the EPROM if fitted from its socket Fit LCD and backlighting unit onto the new digital PCB Where applicable Fit the EPROM 3 33 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 6 Final Reassembly Connect the RS232 cable and the cable from the analog PCB to the digital PCB Engage the display unit under the rear snaps of the display mounting plate and then lower its front edge until it snaps into place Fit the retaining screw Replace the bottom plate and adjustable feet 3 3 7 Replacing the Software Note With Ranger scales it is not possible simply to replace the software since this is permanently programmed in the microcontroller on the analog PCB To replace the software in these scales therefore it is necessary to replace the analog PCB The following description refers to scales that have a plug in EPROM on the digital PCB Unscrew the adjustable feet and remove them Undo the bottom plate retaining screws removing them and the plate itself Undo the retaining screw which fastens the display unit to the mounting plate Pull back the two front cantilever snaps holding the display unit to release it raise the front edge of th
57. lize This time can vary quite a bit depending upon the temperature differences Allow one 1 hour for each 5 degrees Fahrenheit temperature change before using the scale Also after turning the scale ON allow one hour after temperature stabilization for the scale electronics to stabilize 3 1 1 Preventive Maintenance Checklist On a regular basis the scale should be inspected and checked as follows 1 Removethe Platform and Sub Platform and inspect and clean the area beneath the Platform 2 Clean the outside of the scale using a damp cloth with water CAUTION DO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE FINISH OF THE SCALE 3 Check the Power Cord for broken or damaged insulation 4 Make a visual inspection for faulty connectors wiring and loose hardware 3 2 TESTING Before servicing the Ranger scale an operational test and various performance tests should be made to ascertain whether or not the scale meets specifications Turn the scale 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 scale rests on is level and vibration free The masses used for the performance tests and adjustments must meet or exceed ASTM Class 1 Tolerance 3 2 1 Operational Test 1 Plug the Power Cord into a suitable power source 3 2 1 1 Segment Display Test 1 Turn the scale on all segments are enabl
58. oz 0 63 inch 16 mm digit height Backlit LCD Internal power supply 40 hour rechargeable battery powered models available 25 10096 capacity 0 50 100 capacity 0 54 1d 3d OFF Stainless steel weighing ainted cast aluminum housing IP 43 Standard models 10 C to 40C 20 C to 60 NOTE Parts counting is not NTEP approvable CHAPTER 1 INTRODUCTION 1 7 SPECIFICATIONS Cont TABLE 1 4 RANGER WEIGHING NTEP VERSION SPECIFICATIONS Standard Models NTEP RD3RS RD6RS RDI2LS 03015 RD60LS Default Capacity x R eadability Ib 6 x 0 0005 12x0 001 24 x 0 002 60 x 0 005 120 x 0 01 Default Capacity x R eadability kg 3x0 0002 6x 0 0005 12 x 0 001 30 x 0 002 60 x 0 005 DefaultC apacity x Readability g 3000 x 0 2 6000 x0 5 12000 x 1 30000 x 2 60000 x 5 Default Capacity x Readability oz 1200 x 0 1 TEP Capacity x Readability 6 120 x 0 02 TEP Capacity x Readability kg 60x 001 Capacity x Readability g 60000 x 10 TEP Capacity x Readability 02 1200 x 0 2 Linearity g ER Order number RD3RS 2E0 RD6RS 2E0 RDI2LS 2E0 RD30LS 2EO0 RD6OLS 2EO Ranger Options ToorderRangerwith internal rechargeable battery add 1 to the ordernumber above 2nd RS232 To order Ranger with second R S232 data interface add 2 to the order number above BATTERY amp To orderRanger with both an internal rechargeable battery and second R 5232 data interface add 3to the order 2nd RS232 num
59. rminal connector As the battery is further lowered be sure that these wires are not pinched between any part of the housing and battery Before allowing the tape to stick to the housing temporarily allow the battery to rest on the plastic terminals Recheck that the red and blue wires are not pinched When correctly in place the bottom of the battery must be at or slightly below the height of the inner housing wall Slide the battery fully forward toward the display board compartment then press the battery firmly against the inner housing wall to attach the adhesive patch e Tucktheextralength of battery wires into the housing between the small PCB and the battery On small platform models replace the two ribbon cables back into the slot between the inner housing wall and the battery Insure that no wiring will be pinched when the bottom plate is installed Replace the bottom plate and the adjustable feet A small power supply PCB is installed with the battery option This PCB contains a replaceable fuse that provides overcurrent protection A scale that will not power on should have this fuse checked prior to suspecting a defective battery CHAPTER 3 MAINTENANCE PROCEDURES 3 3 4 Hop acing the Analog PCB Unscrew the adjustable feet and remove them Undo the bottom plate retaining screws removing them and the plate itself Disconnect weighing cell cable connecting cable to the digital PCB and the AC adapter output cable from the analog P
60. rn to zero a repeatability problem is indicated and the scale must be serviced by an Ohaus Product Service Specialist 6 Repeat steps 3 through 5 using Load 2 Load 3 and Load 4 as applicable 7 Compare the reference weight readings They should agree per table 3 1 3 26 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 9 RS232 Interface Test The RS232 Interface in the Ranger scale can have its performance monitored using an external printer or computer connected to the scale The RS232 Interface is a bi directional interface which enables the scale to communicate with a printer or computer equipped with an RS232 serial port An RS232 menu is in the scale This menu enables various parameters such as Baud rate Data bits Stop Bits and Parity to be set in the scale The RS232 menu provides communication parameters which can be set to accommodate external printers or computers It contains eight submenus Reset Node Baud Parity Stop Handshake Default String and End RS menu which enable you to program RS232 port parameters Refer to RS232 menu and make sure all communications parameters are properly set 3 2 9 1 Connecting the RS232 Interface When the interface is connected to a computer two way communication between the computer and scale is possible using the commands outlined in the RS232 Command Table 3 3 See Figure 3 5 for connections Whenthe scale is connected directly to a printer displayed data can be output at any time by simpl
61. rns scale ON if OFF Whenscale is ON short press zeros the scale OFF Long press Turns scale OFF if ON PRINT Short press Sends current weight When in MENU MODE short press NO UNITS to the printer Long press Changes UNITS G N T Short presses Gross Net Tare When in MENU MODE short press YES MENU Noactionfor 5 secs scale returns NET Long press Enter MENU TARE Short press enter TARE value 3 2 6 Ranger Weighing Scale Menu Functions This section contains information on the Ranger Weighing Scale menu The menu allows you to match your scale to your specific weighing needs In the menu you can change the settings of your scale and activate functions The Main Menu contains 7 sub menus Each of the seven sub menus are described in detail in the following sections EN gt gt Dp DO D D 3 2 6 1 How to Enter the Menus To enter the menus press and hold the G N T MENU button until CAL appears This is the first menu CALIBRATION If LFT is ON Setup appears first CAL is hidden 3 2 6 2 How to Select a Specific Menu A short press on the PRINT UNITS button NO When in MENU MODE short presses will advance to the next menu as shown above When QUIT is reached the next press on the PRINT UNITS button will return to the CALIBRATION or SETUP menu 3 14 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 6 Ranger Weighing Scale Menu Functions Cont 3 2 6 3 How to Enter an Individual Menu A short press on the G N
62. rovides the communication settings to port racc 1 standard RS232 2is Port 2 which is an option and has exactly the same settings Bold equals factory default settings Function Display Available Settings Application reset rs Press G N T MENU reset all menu items to their factory set tings Press PRINT UNITS NO advances to next menu Print on stb stb only cont Selects mode of operation for dialog disp 2 ref 2 bulk 2 RS232 Print print on stability When LFT is set to ON or e stability only continuous dia CAN the Print and cont log interface disp 2 modes are not available and the default mode for res rs becomes stb only Baud Rate L DIL S 300 600 1200 2400 4800 Various baudrates are avail 9600 19200 able to match external equip ment communication re quirements Parity 7 Even 7 No P 8 No P 7 Various parity settings are LU H Hr IL available to accommodate ternal equipment require ments Two stop settings 1 or 2 are available to accommodate ex ternal equipment require ments Handshake 19 Software handshaking en OTI 2 abled disabled 3 18 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 6 Ranger Weighing Scale Menu Functions Cont 3 2 6 10 RS232 1 RS232 2 Menus Cont Default d End Settings cr End rot 3 2 6 11 Lockout Menu L LIL Header Gross Net Tare PCS APW Ref CT 4L inf F feed LN for
63. screw M6 x 16 spring clip pan head torx screw M4 x 6 5 14 SERVICE MANUAL RANGER SCALES P N 80250926
64. st LCD Short press Switches from weighing to counting mode Sample 10 Short press Takes average piece weight for a sample size of 10 Sample Size Long press and hold scrolls through 5 15 20 25 30 50 and 100 pieces sample size Short press Takes average piece weight for sample number of pieces shown in display 3 6 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 3 Ranger Counting Switch Functions Gp um BUTTONS PRIMARY FUNCTION SECONDARY FUNCTION ON ZERO Short press Turns scale ON if OFF When scale is ON short press zeros the OFF Long press Turns scale OFF if ON scale PRINT Short press Sends current weight to When in MENU MODE short press NO printer UNITS Long press Changes UNITS G N T Short presses Toggles display between When in MENU MODE short press YES MENU Gross Net Tare if tare value is stored Noactionfor5secs scaledisplay reumsto NET Long press Enter MENU TARE Short press enter TARE 3 2 4 Ranger Counting Scale Menu Operation This section describes the menu operation The menu permits matching the scale to specific weighing needs In the menu you can change the settings of the scale and activate functions The Main Menu contains 7 sub menus Each of the seven sub menus are described in detail in the following sections BS gt gt GE E D 3 2 4 1 How to Enter the Menus To enter the menus press and hold the G N T MENU button until CAL appears This is
65. t Menu nr This menu allows software locking and unlocking of the calibra L LIL tion setup read RS232 1 RS232 2 menus Turning individual menu locks ON and OFF prevents accidental changes to menu parameters The locks can be turned OFF to change the param eters However once the Locsetis set to ON the menus can only be unocked by removing the scale bottom cover and using the Unlock switch Function Display Available Settings Application Calibration ON An ON setting locks out OFF the calibration menu ON An ON setting locks out OFF the setup menu An ON setting locks out the read menu An ON setting locks out the RS232 1 menu An ON setting locks out the RS232 2 menu Locks unlocks all of the Lock out menu When set on locks all software settings in this menu LOCSET can only be set to OFF by pressing the UN LOCK switch under the scale End of LOC menu CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation Cont 3 2 4 12 Quit Menu End of menus YES prompts to store saves all n L changes and then will go to a weighing mode ILI IL NO ignores changes and returns to the weighing mode 3 2 5 Ranger Weighing Scale Switch Functions The button switches located on the front panel of the scale provide several functions Please read the following information before pressing any of these buttons D BUTTONS PRIMARY FUNCTION SECONDARY FUNCTION ON ZERO Short press Tu
66. ternal power supply 40 hour rechargeable battery powered models available Span Calibration 25 100 capacity Linearity Calibration 3 points 0 50 100 capacity Auto Zero Tracking 0 5d 1d 3d OFF Construction Stainless steel weighing pan Painted cast aluminum housing Protection 43 Operating temperature Standard models 10 to 40C Storage temperature 20 to 60 TABLE 1 6 RANGER WEIGHING OIML VERSION SPECIFICATIONS WEIGHING RANGE Range 2 6 Cap x Readabi 30x001 60x0 02 Cap x Readabi 3000010 600000 Cap Readabi 60x02 120 x0 05 Cap x Readabi 600x02 1200 0 5 General Specifications Large Platform Platform size w x d cm 35x24 Scale dimensions w x d x h cm 36x37 x11 5 Shipping dimensions w x d x 52x53 x21 Weight kg 9 5 net 11 gross Weighing units g kg Ib oz Display 0 63 inch 16 mm digit height Backlit LCD Power Internal power supply 40 hour rechargeable battery powered models available Span Calibration 25 10096 capacity Linearity Calibration 3 points 0 50 100 capacity Auto Zero Tracking 0 5d 1d 3d OFF Construction Stainless steel weighing pan Painted cast aluminum housing Protection IP 43 Operating temperature Standard models 10 C to 40C Storage temperature 20 to 60 All Ranger models meets the requirements of Approval Agencies UL FCC CSA CE Safety EN60950 Emissions EN55022 Immunity E
67. the first menu CALIBRATION If LFT is ON Setup appears first CAL is hidden 3 2 4 2 How to Select a Specific Menu A short press on the PRINT UNITS button NO When MENU MODE short presses will advance to the next menu as shown above When QUIT is reached the next press on the PRINT UN TSbutton will return to the CALIBRATION or SETUP menu 3 2 4 8 How to Enter an Individual Menu A short press on the G N T MENU button YES and you can enter a specific menu 3 7 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 4 Ranger Counting Scale Menu Operation 3 2 4 4 How to Enter an Individual Menu Item When in any menu a short press on the G N T MENU button YES and you can enter a specific menu item To advance through a given menu make short presses on the PRINT UNITS NO button 3 2 4 5 How to Save and Store an individual menu item When a menu item has been changed once the desired selection is shown make a short press on G N T MENU button Quit appears on the display If NO is selected by pressing the PRINT UNITS button the next menu item appears If yes is selected by pressing G N TMENU StorE appears Pressing the G N T MENU button will store the change and return the scale to a weighing mode If NO is selected the menu change is ignored and the scale is returned to weighing mode 3 2 4 6 How to Quit the Menus A short press on the PRINT UNITS button NO When in MENU MODE short presses will advance through the menus until QUIT is r
68. tware version to the RS232 Port Ranger r x xx or Ranger C rc x xx 3 2 10 Print Test 1 Remove all weight from the platform 2 Press the ON ZERO OFF button once 0 0g should be displayed 3 Place a mass on the Platform 4 Press Print UNITS button the computer and or a printer should indicate the mass value NOTE Printcommands entered through the com puter are temporary When the scale is turned off it will return to scale menu settings when turned on again 3 2 11 Visual Inspection 1 Check that FCC and serial number labels are in place and properly affixed to the scale 2 Check for nicks and scratches and other imperfections Clean and repair as necessary 3 28 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 REPAIR PROCEDURES This section describes how to change individual components of the Ranger scales When doing this please refer to the exploded view drawings and spare parts lists in section 4 Important after replacing components a functional check of the scale must always be carried out 3 3 1 Replacing the Keypad Membrane Liftupthe defective keypad membrane if necessary carefully prying it up with a knife and gently peel it off the scale Note Take care that the specification label is not damaged when the membrane is removed Carefully clean the display mounting plate and window removing all traces of adhesive Make sure that the specification label is in its correct position must be visible through the w
69. utton display ad vances to READ MENU CHAPTER 3 MAINTENANCE PROCEDURES 3 2 0 Ranger Weighing Scale Menu Functions Cont 3 2 6 9 Read Menu E B The Read menu contains entries for reset averaging level unit 1 rong unit 2 auto zero auto tare auto power off retain zero data and end See table below for details Bold equals factory default settings Function Display Available Settings Low Med High Unit 1 kg oz Ib II l 9 Kg 02 un it j g kg oz Ib Auto Zero Tracking 0 5d 1d 3d Off Ack Auto Tare Retain Zero Data L End Read Settings End of read menu L J _ no ro Application Press G N T MENU reset all menu items to their factory set tings Press PRINT UNITS NO advances to next menu Averaging level High greater stability Med mid stabilty Low less stability faster processing time This is the first weighing unit This is the alternate weighing unit Settings minimize temperature and small disturbances on the zero reading Enables automatic tare when set to ON When set YES scale turns off after 5 minutes NOTE Default is YES if battery option is installed else NO Retains stored zero point when scale is turned off End of Read menu when se lected display advances to RS232 1 menu CHAPTER 3 MAINTENANCE PROCEDURES 3 2 6 Ranger Weighing Scale Menu Functions Cont 3 2 6 10 RS232 1 RS232 2 Menus E333 The RS232 1 menu p
70. w seconds Li a Di 3nnn You are now prompted by the display to calibrate your ALI LI Ui weighing system at that value which you have specified as weighing range e If you do not want to calibrate with this value e g because you do not have sufficient weights available press the PRINT UNITS button repeatedly until the de sired calibration weight appears in the display the cali bration weight is reduced every time the button is pressed When the preload value has been entered in the scale Done momentarily appears in the display to confirm that calibration has been successfully completed Note it is generally recommended to calibrate the scale at full load This applies especially to certifiable scales dont R 3 41 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 9 5 Working in Service Mode Cont 3 3 9 6 Quitting Service Mode The message done followed by End appears in the display to confirm that calibration has been successfully concluded Press the G N T MENU button Store appears press G N T MENU button to store new calibration data In the last service mode block you can decide whether you want to quit service mode or make further settings If you want to make further settings in service mode press the PRINT UNITS button The first service mode block RAMP then appears again in the display If you do not wantto make any further settings press the G N T MENU button to exit service
71. with Strain Guage Weighing Cells 4 2 4 1 3 Overview of Weighing Cells and Preloads 4 3 4 1 4 Geographical Adjustment Values 4 4 CHAPTER 5 DRAWINGS AND PARTS LISTS 5A DRAWINGS RCM Rc 5 1 5 2 Miscellatieous CAE uence 5 14 TABLE OF CONTENTS Cont LIST OF TABLES TABLE NO TITLE PAGE NO 1 1 Ranger Calibration Masses kg 1 5 1 2 Ranger Calibration Masses ID receipt enin 1 5 1 3 Ranger Count NTEP Version Specifications 1 6 1 4 Ranger Weighing NTEP Version Specifications 1 7 1 5 Ranger Count OIML Specifications 1 8 1 6 Ranger Weighing OIML Version Specifications 1 8 2 1 99 E 2 2 2 2 Error CodeS Eeer 2 3 3 1 Types of Performance Tests 3 24 3 2 linearity Test ico Ra DAS Ap ue 3 25 3 3 5232 ele Elo Le EE 3 28 4 1 Data for Certifiable Certified Ranger 4 1 4 2 Data for Noncertifiable Ranger Scales 4 2 4 3 Strain Gauge Weighing Cells ann 4 3 4 4 Ranger Geographical Adjustment Values 4 4 LIST OF ILLUSTRATIONS FIGURE NO TITLE PAGE NO 3 1 Segment Ueleg 3 1 3 2 Ran
72. y pressing PRINT UNITS Data Out TXD Data In RXD ae 00000 roun ODAO 1 2 3 4 5 6 7 8 9 Figure 3 6 RS232 Interface Pin Connections 3 27 CHAPTER 3 MAINTENANCE PROCEDURES 3 2 9 1 Connecting the RS232 Interface Cont RS232 Commands All communication is accomplished using standard ASCII format Only the characters shown in the RS232 Command Table 3 3 are acknowledged by the scale Invalid command response ES error indicates the scale has not recogonized the command Commands sent to the scale must be terminated with a line feed LF or carriage return line line feed CRLF Data output by the scale is always terminated with a carriage return line feed CRLF TABLE 3 3 RS232 COMMANDS Character Description Print weight stable or unstable after P cmd 1S Print stable weight after P cmd Print on stability Send final stable weight value Continuous Print Prints weight string w o default string information Interval Print Print Interval 1 3600 sec turns off interval printing Print display data see 0 and 1S Prints stable data only when LFT is ON Same as pressing Zero button Same as pressing Tare button Begin span calibration Begin linearity calibration Download Tare value in grams Uses unit set as Unit 1 Show serial number 1 to 5 header lines are available with 24 characters per line enter H space then text in quotations See below Sends scale ID and sof

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