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.)