OHAUS Ranger User manual

Ohaus CorporationOhaus Corporation
Ohaus CorporationOhaus Corporation
Ohaus Corporation
19A Chapin Road
P.O. Box 2033
Pine Brook, NJ 07058-2033 USA
www.ohaus.com
OhausCorporation19AChapinRoad,P.O.Box2033,PineBrook,NJ07058-2033(973)377-9000
RANGER
COUNTING &WEIGHING SCALES
SERVICE MANUAL

The information contained in this manual is believed to be accurate at the time of publication, but
OhausCorporationassumesnoliabilityarisingfromtheuseormisuseofthismaterial. Reproduc-
tion of this material is strictly prohibited.
Material in this manual is subject to change.
©Copyright 2001Ohaus Corporation,all rightsreserved.
® Registered trademark of Ohaus Corporation.
SERVICE MANUAL
Ohaus CorporationOhaus Corporation
Ohaus CorporationOhaus Corporation
Ohaus Corporation
Ranger Counting and Weighing Scales
Ranger
Scale Count Sample
Clear Select Weight Size
10 Sample
APW
Count
Ranger
Weighing Scale
Counting Scale

i
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
1.1 Overview of Ranger Counting Scale Controls ........................................1-1
1.2 Overview of Ranger Weighing Scale Controls........................................1-3
1.3 Introduction ..........................................................................................1-4
1.4 Service Facilities ....................................................................................1-4
1.5 Tools and Test Equipment Required ......................................................1-5
1.5.1 Special Tools..................................................................................1-5
1.5.2 Standard Tools and Test Equipment ..............................................1-5
1.6 Test Masses Required............................................................................1-5
1.7 Specifications .........................................................................................1-6
CHAPTER 2 TROUBLESHOOTING
2.1 Troubleshooting......................................................................................2-1
2.2 Diagnostic Guide (Table)........................................................................2-1
2.2.1 Diagnosis........................................................................................2-1
2.3 Error Codes ..........................................................................................2-3
2.4 Error Messages After Service Work ........................................................2-3
CHAPTER 3 MAINTENANCE PROCEDURES
3.1 Preventive Maintenance .........................................................................3-1
3.1.1 Preventive Maintenance Checklist..................................................3-1
3.2 Testing. ..........................................................................................3-1
3.2.1 Operational Test .............................................................................3-1
3.2.1.1 Segment Display Test .......................................................3-1
3.2.2 MenuStructure................................................................................3-2
3.2.3 Ranger Counting Switch Functions ................................................3-6
3.2.4 Ranger Counting Scale Menu Operation........................................3-7
3.2.4.1 How to Enter the Menus ....................................................3-7
3.2.4.2 How to Select a Specific Menu..........................................3-7
3.2.4.3 How to Enter an Individual Menu.......................................3-7
3.2.4.4 How to Enter an Individual Menu Item...............................3-8
3.2.4.5 How to Save and Store an Individual Menu Item...............3-8
3.2.4.6 How to Quit the Menus ......................................................3-8
3.2.4.7 Calibration Menu ...............................................................3-8
3.2.4.8 Setup Menu .......................................................................3-9
3.2.4.9 Read Menu......................................................................3-10
3.2.4.10RS232-1/RS232-2 Menus ...............................................3-11
3.2.4.11Lockout Menu..................................................................3-13
3.2.4.12Quit menu ........................................................................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 a Specific Menu........................................3-14
3.2.6.3 How to Enter an Individual Menu.....................................3-15
3.2.6.4 How to Enter an Individual Menu Item.............................3-15
Page

ii
3.2.6.5 How to Save and Store an Individual Menu Item.............3-15
3.2.6.6 How to Quit the Menus ....................................................3-15
3.2.6.7 Calibration Menu .............................................................3-15
3.2.6.8 Setup Menu .....................................................................3-16
3.2.6.9 Read Menu......................................................................3-17
3.2.6.10RS232-1/RS232-2 Menus ...............................................3-18
3.2.6.11Lockout Menu..................................................................3-19
3.2.6.12Quit Menu ........................................................................3-20
3.2.7 Calibration and Sealing ................................................................3-21
3.2.7.1 Calibration Masses..........................................................3-21
3.2.7.2 Calibration Procedure .....................................................3-21
3.2.7.3 Unlocking the Menus.......................................................3-22
3.2.7.4 Weights and Measures Sealing.......................................3-23
3.2.8 PerformanceTests........................................................................3-24
3.2.8.1 Repeatability Test ...........................................................3-24
3.2.8.2 Off-CenterLoadTest .......................................................3-25
3.2.8.3 Linearity Test...................................................................3-25
3.2.9 RS232 Interface Test ....................................................................3-27
3.2.9.1 Connecting the RS232 Interface .....................................3-27
3.2.10 Print Test ......................................................................................3-28
3.2.11 Visual Inspection ..........................................................................3-28
3.3 Repair Procedures................................................................................3-29
3.3.1 Replacing the Keypad Membrane ................................................3-29
3.3.2 Replacing the AC Adapter ............................................................3-29
3.3.3 Replacing the Internal Rechargeable battery................................3-30
3.3.4 Replacing the Analog PCB...........................................................3-32
3.3.5 Replacing the Display Mounting Plate, Display Unit
and Digital PCB............................................................................3-32
3.3.5.1 Preliminary Work .............................................................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 ...................................................3-33
3.3.5.4 Replacing the Digital PCB ..............................................3-33
3.3.6 Final Reassembly.........................................................................3-34
3.3.7 Replacing the Software.................................................................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 Ac cessingServiceModewithScalesthatarenotCertified ..... 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 Blocks.......................................................3-37
3.3.9.5 Working in Service Mode ................................................3-38
TABLE OF CONTENTS (Cont.)

iii
CHAPTER 4 DATA TABLES
4.1 introduction ..........................................................................................4-1
4.1.1 Certifiable and Certified Ranger Scales with Strain Guage
Weighing Cells ...............................................................................4-1
4.1.2 Noncertifiable Ranger Scales 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
5.1 Drawings....... ..........................................................................................5-1
5.2 Miscellaneous Parts..............................................................................5-14
TABLE OF CONTENTS (Cont.)

iv
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 lb ...........................................................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 Diagnostic Guide...............................................................................2-2
2-2 Error Codes .......................................................................................2-3
3-1 Types of Performance Tests............................................................3-24
3-2 Linearity Test Masses......................................................................3-25
3-3 RS232 Commands..........................................................................3-28
4-1 Data for Certifiable/Certified Ranger Scales......................................4-1
4-2 Data for Noncertifiable Ranger Scales ..............................................4-2
4-3 Strain Gauge Weighing Cells ............................................................4-3
4-4 Ranger Geographical Adjustment Values .........................................4-4
LIST OF ILLUSTRATIONS
FIGURE NO. TITLE PAGE NO.
3-1 Segment Displays .............................................................................3-1
3-2 Ranger Counting Scale Menus .........................................................3-2
3-3 Ranger Weighing Scale Menus.........................................................3-4
3-4 Ranger Service Menu Structure ........................................................3-6
3-5 Off-Center Load Test Mass Locations..............................................3-25
3-6 RS232 Interface Pin Connections ...................................................3-27
3-7 Unlock Switch Locations .................................................................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 Shown.........................................5-7
5-5 Weigh Display ...................................................................................5-8
5-6 Count Display....................................................................................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

1-1
CHAPTER 1 INTRODUCTION
Ranger
Clear Scale
Select Count
Weight Sample Size
10 Sample
APW
Count
1
2
3
5
6
7
8
9
10a 11 12 13 14
15 16
24
Rear of scale
Display
17 18
19
20
21
2223
Clear APW Scale
Select Count
Weight Sample
10 Sample
Size
4
25 26 27 28 29 30
Function keys
10b
kg %Pcs
Com
tbz NET B/G
12 12
%
Auto Opt
050 100
1.1 OVERVIEW OF RANGER COUNTING SCALE CONTROLS

1-2
CHAPTER 1 INTRODUCTION
Scale
1Keypad
2Function keys
3Display
4Scale specifications
5Weighing pan
6Power cord
7Power cord with AC Adapter (Scale with
internal battery optional)
8Adjustable feet
Rear of scale
9Jack for AC Adapter (battery option)
10a Serial # label (Europe)
10b Serial # label (USA) under weighing plat-
form
11 Hole for antitheft device
12 Spirt level
13 RS232 Interface (Optional)
14 RS232 Interface (Standard)
Display
15 Stability indicator
16 Active interface (for menu mode)
17 Active scale (in 2-scale systems)
18 Weighing range display (for dual range
scales)
19 Symbols for net/gross weight
20 Battery discharge status (optional battery)
21 Weighing unit
22 Number of user selected reference pieces
23 Weighing range bar graph
24 Center of zero indicator
Function keys
25 Clear APW and return to weighing.
26 Average Piece Weight - one piece refer-
ence weight is displayed for 3 seconds.
27 If RS is set to reference or bulk mode, this
button switches the display between the
hostscaleandtheremotescale. Tare,Zero
and G/N/T buttons functions are active for
the scale being displayed.
28 Switch between Weighing and Counting
Modes.
29 Used for a sample size of 10 pieces.
30 Continuous press - scrolls through 5, 15,
20,25,30,50and100pieces-samplesize.
Shortpress-takesamplesizeasindicated
1.1 OVERVIEW OF RANGER COUNTING SCALE CONTROLS (Cont.)

1-3
CHAPTER 1 INTRODUCTION
1
1
2
3
4
5
6
7
8
9a 10 11 12 13
14 15
16 17 18
Rear of scale
Display
1Keypad
2Display
3Capacity label
4Weighing pan
5Power cord
6AC Adapter (Scale with battery option)
7Adjustable feet
8Jack for AC Adapter (battery option)
9a Serial # label (Europe)
9b Serial # Label (USA) under weighing
platform
10 Hole for antitheft device
11 Spirt level
12 RS232 Interface (Optional)
13 RS232 Interface (Standard)
14 Stability indicator
15 Weighing range display (for dual range
scales)
16 Center of zero indicator
17 weighing unit
18 Net symbol when weighing with tare
19 Battery discharge status (optional)
Ranger
kg Pcs
Com
tbz NET
12
9b
1.2 OVERVIEW OF RANGER WEIGHING SCALE CONTROLS
19

1-4
CHAPTER 1 INTRODUCTION
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 sources.
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), 15kg (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:

1-5
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 Special Tools
None required.
1.5.2 Standard Tools and Test Equipment
1. DigitalVoltmeter(DVM) - Inputimpedanceofat least10megohmsinthe 1Voltdcposition.
2. Torx screwdrivers, TX8, TX20, TX30 and TX50
1.6 TEST MASSES REQUIRED
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
WeighingSG RD3RS 3kg 3kg 1.5kg
WeighingSG RD6RS 6kg 6kg 3kg
WeighingSG RD12LS 12kg 12kg 6kg SingleRange(NTEP)
WeighingSG RD12LS 15kg 15kg 7.5kg DualRange(OIML)
WeighingSG RD30LS 30kg 30kg 15kg SingleRange(NTEP)
WeighingSG RD30LS 35kg 35kg 17.5kg DualRange(OIML)
WeighingSG RD60LS 60kg 60kg 30kg SingleRange(NTEP)
TYPE MODEL CAPACITY SPAN LINEARITY NOTES
WeighingSG RD3RS 6lb 6lb 3lb
WeighingSG RD6RS 12lb 12lb 6lb
WeighingSG RD12LS 24lb 24lb 12lb SingleRange(NTEP)
WeighingSG RD12LS 30lb 30lb 7.5lb DualRange(OIML)
WeighingSG RD30LS 60lb 60lb 30lb SingleRange(NTEP)
WeighingSG RD30LS 70lb 70lb 35lb DualRange(OIML)
WeighingSG RD60LS 120lb 120lb 60lb SingleRange(NTEP)
TABLE 1-2. RANGER CALIBRATION MASSES LB

1-6
CHAPTER 1 INTRODUCTION
1.7 SPECIFICATIONS
Complete specificatons for the Ohaus Ranger Counting and Weighing Scales are listed 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
Standard Models NTEP* RD3RS RD6RS RD12LS RD30LS RD60LS
DefaultCapacityxReadability(lb) 6x0.0005 12x0.001 24 x 0.002 60 x 0.005 120 x 0.01
DefaultCapacityxReadability(kg) 3x0.0002 6x0.0005 12 x 0.001 30 x 0.002 60 x 0.005
DefaultCapacityxReadability(g) 3000x0.2 6000x0.5 12000 x 1 30000x 2 60000 x 5
DefaultCapacityxReadability(oz) 60x0.005 120x0.01 240 x 0.02 600 x 0.05 1200 x 0.1
NTEPCapacityxReadability(lb) 6x0.001 12x0.002 24 x 0.005 60 x 0.01 120 x 0.02
NTEPCapacityxReadability(kg) 3x0.0005 6x0.001 12 x 0.002 30 x 0.005 60 x 0.01
NTEPCapacityxReadability(g) 3000x0.5 6000x1 12000 x 2 30000 x 5 60000 x 10
NTEPCapacityxReadability(oz) 60x0.01 120x0.02 240 x 0.05 600 x 0.1 1200 x 0.2
Linearity(g) +/- 0.2 +/- 0.5 +/- 1.0 +/- 2.0 +/- 5.0
Order number: RD3RS-2E0 RD6RS-2E0 RD12LS-2E0 RD30LS-2E0 RD60LS-2E0
Note NTEP for weighing only ................
General Specifications All Models
Platform size(w x d)(in/cm) 9.5 x 8 / 24 x 20 14 x 9.5 / 35 x 24
Scaledimensions(wxdxh)(in/cm) 10.5 x13.2x 4 /26.5 x 33.5x 10 14.2x 14.6 x4.5/ 36 x37 x 11.5
Shippingdimensions(wxdxh)(in/cm) 16.5 x 19 x 10 / 42 x 48 x 25 20 x 20.5 x 10.5 / 52 x 53 x 27
Weightlb/kg) 11.5/ net (14/6.5gross) 21 / 9.5 net (24 / 11 gross)
Weighingunits g, kg, lb, oz
Display 0.63inch/16mmdigitheight,(BacklitLCD)
Power Internalpowersupply/40hourrechargeablebatterypoweredmodelsavailable
SpanCalibration 25% - 100% capacity
LinearityCalibration(3pointcalibration) 0–50%- 100% capacity
AutoZeroTracking 0.5d, 1d, 3d, OFF
Construction Stainlesssteelweighingpan/Paintedcast-aluminumhousing
Protection IP43
Operatingtemperature Standard models -10°C to 40C°
Storagetemperature -20°C to 60°C
NOTE: Parts counting is not NTEP approvable.

1-7
CHAPTER 1 INTRODUCTION
TABLE 1-4. RANGER WEIGHING NTEP VERSION SPECIFICATIONS
Standard Models NTEP RD3RS RD6RS RD12LS RD30LS RD60LS
DefaultCapacityxReadability(lb) 6x0.0005 12x0.001 24 x 0.002 60 x 0.005 120 x 0.01
DefaultCapacityxReadability(kg) 3x0.0002 6x0.0005 12 x 0.001 30 x 0.002 60 x 0.005
DefaultCapacityxReadability(g) 3000x0.2 6000x0.5 12000 x 1 30000 x 2 60000 x 5
DefaultCapacityxReadability(oz) 60x0.005 120x0.01 240 x 0.02 600 x 0.05 1200 x 0.1
NTEPCapacityxReadability(lb) 6x0.001 12x0.002 24 x 0.005 60 x 0.01 120 x 0.02
NTEPCapacityxReadability(kg) 3x0.0005 6x0.001 12 x 0.002 30 x 0.005 60 x 0.01
NTEPCapacityxReadability(g) 3000x0.5 6000x1 12000 x 2 30000 x 5 60000 x 10
NTEPCapacityxReadability(oz) 60x0.01 120x0.02 240 x 0.05 600 x 0.1 1200 x 0.2
Linearity(g) +/- 0.2 +/- 0.5 +/- 1.0 +/- 2.0 +/- 5.0
Order number: RD3RS-2E0 RD6RS-2E0 RD12LS-2E0 RD30LS-2E0 RD60LS-2E0
Ranger Options
1 BATTERY ToorderRangerwithinternalrechargeablebattery,add /1 totheordernumberabove.
2 2nd RS232 ToorderRangerwithsecondRS232datainterface,add /2 totheordernumberabove.
3 BATTERY & ToorderRangerwithbothaninternalrechargeablebatteryandsecondRS232datainterface,add /3 totheorder
2nd RS232 numberabove.
General Specifications
Platform size(w x d)(in/cm) 9.5 x 8 / 24 x 20 14 x 9.5 / 35 x 24
Scaledimensions(wxdxh)(in/cm) 10.5 x13.2x 4 /26.5 x 33.5x 10 14.2x 14.6x 4.5 /36x 37 x11.5
Shippingdimensions(wxdxh)(in/cm) 16.5 x19 x 10/42 x 48x 25 20x 20.5 x10.5/ 52 x53 x 27
Weight(lb/kg) 11.5/ net (14/6.5gross) 21 / 9.5 net (24 / 11 gross)
Weighingunits g, kg, lb, oz
Display 0.63inch/16mmdigitheight,(BacklitLCD)
Power Internalpowersupply/40hourrechargeablebatterypoweredmodelsavailable
SpanCalibration 25% - 100% capacity
LinearityCalibration(3pointcalibration) 0–50%-100%capacity
AutoZeroTracking 0.5d, 1d, 3d, OFF
Construction Stainlesssteelweighingpan/Paintedcast-aluminumhousing
Protection IP43
Operatingtemperature Standard models -10°C to 40C°
Storagetemperature -20°C to 60°C
1.7 SPECIFICATIONS (Cont.)

1-8
CHAPTER 1 INTRODUCTION
TABLE 1-5. RANGER COUNT OIML VERSION SPECIFICATIONS
Models 3 kg 6 kg 15 kg 35 kg 60 kg
WEIGHINGRANGE Range 1 Range 2 Range 1 Range 2 Range 1 Range 2 Range 1 Range 2 Range 1 Range 2
Default Cap. x Readability (kg) 1.5kg x0.5g 3kg x 1g 3kg x 1g 6kg x 2g 6 x 0.002 15 x 0.005 15 x 0.005 35 x 0.01 30 x 0.01 60 x 0.02
Default Cap. x Readability (g) 1500 x 0.5 3000 x 1 3000 x 1 6000 x 2 6000 x 2 15000 x 5 15000 x 5 35000 x 10 30000x 10 60000x20
Default Cap. x Readability (lb) 3 x 0.001 6 x 0.002 6 x 0.002 12 x 0.005 12 x 0.005 30 x 0.01 30 x 0.01 70 x 0.02 60 x 0.02 120 x0.05
Default Cap. x Readability (oz) 30 x 0.02 60 x 0.02 60 x 0.02 120 x 0.05 120 x 0.05 300 x 0.2 300 x 0.2 700 x 0.2 600 x 0.2 1200 x 0.5
General Specifications Small Platform LargePlatform
Platform size (w x d) (cm) 24 x 20 35x 24
Scale dimensions (w x d x h) (cm) 26.5 x 33.5 x 10 36 x 37x 11.5
Shipping dimensions (w x d x h)(cm) 42 x 48 x 25 52x 53 x 27
Weight (kg) 5 net (6.5 gross) 9.5 net (11 gross)
Weighing units g, kg, lb, 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% - 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 IP43
Operating temperature Standard models -10°C to 40C°
Storage temperature -20°C to 60°C
Models 3 kg 6 kg 15 kg 35 kg 60 kg
WEIGHINGRANGE Range 1 Range 2 Range 1 Range 2 Range 1 Range 2 Range 1 Range 2 Range 1 Range 2
Default Cap. x Readability (kg) 1.5kg x0.5g 3kg x 1g 3kg x 1g 6kg x 2g 6 x 0.002 15 x 0.005 15 x 0.005 35 x 0.01 30 x 0.01 60 x 0.02
Default Cap. x Readability (g) 1500 x 0.5 3000 x 1 3000 x 1 6000 x 2 6000 x 2 15000 x 5 15000 x 5 35000 x 10 30000x 10 60000x20
Default Cap. x Readability (lb) 3 x 0.001 6 x 0.002 6 x 0.002 12 x 0.005 12 x 0.005 30 x 0.01 30 x 0.01 70 x 0.02 60 x 0.02 120 x0.05
Default Cap. x Readability (oz) 30 x 0.02 60 x 0.02 60 x 0.02 120 x 0.05 120 x 0.05 300 x 0.2 300 x 0.2 700 x 0.2 600 x 0.2 1200 x 0.5
General Specifications Small Platform LargePlatform
Platform size (w x d) (cm) 24 x 20 35x 24
Scale dimensions (w x d x h) (cm) 26.5 x 33.5 x 10 36 x 37x11.5
Shipping dimensions (w x d x h)(cm) 42 x 48 x 25 52x53 x 27
Weight (kg) 5 net (6.5 gross) 9.5 net (11 gross)
Weighing units g, kg, lb, 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% - 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 IP43
Operating temperature Standard models -10°C to 40C°
Storage temperature -20°C to 60°C
All Ranger models meets the requirements of Approval Agencies: UL, FCC, CSA, CE Safety EN60950, Emissions EN55022,
Immunity EN50082-1.
TABLE 1-6. RANGER WEIGHING OIML VERSION SPECIFICATIONS
1.7 SPECIFICATIONS (Cont.)

2-1
CHAPTER 2 TROUBLESHOOTING
2.1 TROUBLESHOOTING
This section of the manual specifies problem areas of the scale which can occur. Information is
containedtoisolatespecificproblemsusingTable2-1,DiagnosticGuide,andTable2-2,ErrorCodes.
Followalldirectionsstepbystep. Makecertainthattheworkareaiscleanandusecarewhenhandling
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
thetable,firstlocatethesymptomthatyouareobserving. Followthe symptomcolumnandreviewthe
probable cause column and remedy column. The probable causes are listed with the most common
causefirst. Ifthefirstremedydoesnotfixtheproblem,proceedontothenextremedy. Beforeattempting
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.
2.2.1 Diagnosis
1. Isolate and identify the symptom.
2. Refer to 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 interrelated.
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: [phone]
Fax: [phone]
In the United States call toll free, 800-526-0659 between 8:00 a.m. and 6:00 p.m. EST.

2-2
CHAPTER 2 TROUBLESHOOTING
TABLE 2-1. DIAGNOSTIC GUIDE
SYMPTOM
Unit will not turn on.
Cannotzeroscale,orwillnot
zero when turned on.
CenterofZerodisplayerratic
or does not appear with no
load on platform.
Cannot display weight in de-
sired weighing unit.
RS232 not working.
Unable to calibrate unit.
REMEDY
Check power cord connec-
tions.
Check battery, charge bat-
tery.
Checkfunctionsofmembrane
switch.
Reduceloadonscaletoless
thancurrentamount.
Remove source of vibration.
Remove external distur-
bances or reduce motion.
Increase AZT level in read-
outmenu.
Increase averaging level in
readout menu.
Enable desired unit in Read
menu.
Verifycommunicationparam-
eters.
Check cable connections.
Usecorrectcalibrationmass.
Set CAL to OFF in LOC
menu.
Set LFT to OFF.
PROBABLE CAUSE(S)
Notpluggedinorproperlycon-
nected.
Batteryoperation-batterydead
or not fully charged.
Membrane switch failure.
Load on scale exceeds allow-
able zero.
Platformunsteady.
Scale platform motion or dis-
turbances exceed center of
zero criteria.
Desired unit not set to ON in
Read menu.
RS232communicationparam-
eters set up incorrectly.
Improper or loose cable con-
nections.
Incorrect value for calibration
mass.
Lockout menu CAL set to ON.
LFT set ON.

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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.
Error1: Indicates an overload condition.
Error2: Indicates an underload condition.
Error3: Average piece weight too small.
Error4: Reference weight too small. The weight on the platform is too small to define a
valid reference weight for counting scale.
Error5: No valid reading from second scale. When parts counting with a two scale
system, communications lost.
Error6: Scale needs calibration.
Error9: Unstable weight reading when defining the reference weight.
Error53: EEPROM checksum error.
-------: Busy (tare, zero, printing).
--no--: Function not executed.
2.4 ERROR 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:
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-
enterthetype data(weighingrange,serial number,geographicaladjustmentvalue)
in servicemodeand save them. Access service mode againand then calibrate and
linearize the scale.
Error6:
Error53:

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CHAPTER 2 TROUBLESHOOTING