OHAUS Defender 3000 Series User manual

Defender3000 Indicators
Service Manual
i-DT33P
i-DT33XW

Defender 3000 Indicators Service Manual EN-1
TABLE OF CONTENTS
1. INTRODUCTION.......................................................................................................................................... 3
1.1 Definition of Signal Warning and Symbols................................................................................................. 3
1.1.1 Safety Precautions.............................................................................................................................. 3
1.1.2 Intended Use....................................................................................................................................... 4
1.2 Service Facilities........................................................................................................................................ 4
1.3 TOOLS AND TEST EQUIPMENT REQUIRED ......................................................................................... 4
1.3.1 Special Tools and Test Equipment List............................................................................................... 5
1.3.2 Standard Tools and Test Equipment List............................................................................................ 5
1.4 Overview of Parts....................................................................................................................................... 6
1.4.1 Parts of i-DT33P................................................................................................................................. 6
1.4.2 Parts of i-DT33XW ............................................................................................................................. 6
1.4.3 Main PCB ............................................................................................................................................ 7
1.5 Control Functions....................................................................................................................................... 8
1.6 External Connections............................................................................................................................... 10
1.6.1 Battery Power Supply........................................................................................................................ 10
1.6.2 AC Power to i-DT61XWE.................................................................................................................. 10
1.7 Internal Connections................................................................................................................................ 11
1.7.1 Load cell connection EasyConnectTM Indicator................................................................................. 11
1.7.2 Load cell connection Non-EasyConnectTM Indicator......................................................................... 11
1.7.3 RS232 Connection i-DT33P.............................................................................................................. 16
1.7.4 RS232 Connection i-DT33XW .......................................................................................................... 16
1.8 Mounting Bracket..................................................................................................................................... 17
2MENU SETTINGS...................................................................................................................................... 18
2.1 Menu Navigation...................................................................................................................................... 18
2.2 Button Navigation..................................................................................................................................... 19
2.3 Calibration Menu...................................................................................................................................... 20
2.3.1 Initial Calibration................................................................................................................................ 20
2.3.2 Zero Calibration [ZErO]....................................................................................................................... 20
2.3.3 Span Calibration [SpaN]...................................................................................................................... 21
2.3.4 Linearity Calibration [LIN].................................................................................................................. 21
2.3.5 GEO Adjustment [GEO]....................................................................................................................... 22
2.3.6 Calibration Test [C.test] .................................................................................................................... 22
2.3.7 End Cal [End] ..................................................................................................................................... 23
2.4 Service Menu........................................................................................................................................... 23
2.4.1 Ramp [rAmMP]..................................................................................................................................... 23

EN-2 Defender 3000 Indicators Service Manual
2.4.2 Expand [ExpanD]................................................................................................................................. 23
2.4.3 Reset [reset]..................................................................................................................................... 23
2.4.4 Demo [demMO]..................................................................................................................................... 23
2.4.5 Auto On [AUtO.ON]............................................................................................................................... 23
3MAINTENANCE......................................................................................................................................... 24
3.1 Preventive Maintenance .......................................................................................................................... 24
3.2 Preventive Maintenance Checklist........................................................................................................... 24
3.3 Troubleshooting....................................................................................................................................... 25
3.4 Verification of the safe state of the equipment after service.................................................................... 26
3.5 Service Information.................................................................................................................................. 26
4TECHNICAL DATA.................................................................................................................................... 27
4.1 Specifications........................................................................................................................................... 27
4.2 Table of Geo Values................................................................................................................................ 29
5REPLACING MAJOR COMPONENTS (INDICATOR).............................................................................. 30
5.1 Open the Housing.................................................................................................................................... 30
5.2 Printed Circuit Board (PCB) Replacement............................................................................................... 32
5.3 Power PCB Replacement........................................................................................................................ 35
5.4 Display Replacement............................................................................................................................... 36
5.3 Loadcell Cable Replacement................................................................................................................... 38
5.4 Function Label Replacement................................................................................................................... 39
6PARTS IDENTIFICATION ......................................................................................................................... 40
6.1 Defender 3000 Series Indicator: i-DT33P................................................................................................ 40
6.2 Defender 3000 Series Indicator: i-DT33XW ............................................................................................ 42
APPENDIX A. CONFIGURING THE MAIN PCBA.......................................................................................... 44
APPENDIX B. SOFTWARE UPGRADE VIA SERVICE TOOL....................................................................... 46

Defender 3000 Indicators Service Manual EN-3
1. INTRODUCTION
This service manual contains the information needed to perform routine maintenance and service on the
Defender 3000 Series Scales. There will be two parts for the service manual where first part will describe
the service on the Indicator as this manual and second part would describe the service for the bases, please
refer to Defender Series Base Service Manual. Please read this manual completely before repair and
maintenance.
1.1 Definition of Signal Warning and Symbols
Safety notes are marked with signal words and warning symbols. These show safety issues and warnings.
Ignoring the safety notes may lead to personal injury, damage to the instrument, malfunctions and false
results.
1.1.1 Safety Precautions
Definition of Signal Warnings and Symbols
Safety notes are marked with signal words and warning symbols. These show safety issues and warnings.
Ignoring the safety notes may lead to personal injury, damage to the instrument, malfunctions and false
results.
WARNING
For a hazardous situation with medium risk, possibly resulting in severe injuries or
death if not avoided.
CAUTION
For a hazardous situation with low risk, resulting in damage to the device or the
property or in loss of data, or minor or medium injuries if not avoided.
ATTENTION
For important information about the product. May lead to equipment damage if not
avoided.
NOTE
For useful information about the product.
Warning Symbols
General hazard
Explosion hazard
Electrical shock hazard
Safety Precautions
CAUTION: Read all safety warnings before installing, making connections, or servicing this
equipment. Failure to comply with these warnings could result in personal injury and/or property
damage. Retain all instructions for future reference.
Before connecting power, verify that the equipment’s input voltage range and plug type are
compatible with the local AC mains power supply.
Do not position the equipment such that it is difficult to reach the power connection.
Only connect the power cord to a compatible grounded electrical outlet.
Only use a power cord with a rating that exceeds the specifications on the equipment label.
(Only for i-DT33P)
Make sure that the power cord does not pose a potential obstacle or tripping hazard.
Operate the equipment only under ambient conditions specified in these instructions.
The equipment is for indoor use only.
Do not operate the equipment in hazardous or unstable environments.
Do not allow liquids to enter the equipment.
Use only approved accessories and peripherals.
Disconnect the equipment from the power supply when cleaning.
Service should only be performed by authorized personnel.

EN-4 Defender 3000 Indicators Service Manual
WARNING: Never work in an environment subject to explosion hazards! The housing of the
instrument is not gas tight. (Explosion hazard due to spark formation, corrosion caused by the
ingress of gases).
WARNING: Electrical shock hazards exist within the housing. The housing should only be
opened by authorized and qualified personnel. Remove all power connections to the unit before
opening.
1.1.2 Intended Use
This instrument is intended for use in light industry. It must only be used for measuring the parameters
described in these operating instructions. Any other type of use and operation beyond the limits of technical
specifications, without written consent from OHAUS, is considered as not intended. This instrument
complies with current industry standards and the recognized safety regulations; however, it can constitute a
hazard in use. If the instrument is not used according to these operating instructions, the intended protection
provided by the instrument may be impaired.
1.2 Service Facilities
To service an indicator, the service area should meet the following requirements:
Must be protected from electrostatic discharge.
Should be temperature controlled and meet the indicator specifications for temperature
environmental requirements. See specifications for temperature range.
Must be free of vibrations such as fork lift trucks close by, large motors, etc.
Must be free of air currents or drafts from air conditioning/heating ducts, open windows, people
walking by, fans, etc.
Area must be clean and air must not contain excessive dust particles.
Work surface must be stable and level.
Work surface must not be exposed to direct sunlight or radiating heat sources.
1.3 Tools and Test Equipment Required
In order to properly service the Indicator, certain special tools and test items are required in addition to
standard electronic tool kits. These items are listed as follows:

Defender 3000 Indicators Service Manual EN-5
1.3.1 Special Tools and Test Equipment List
1. Ohaus Scale Base.
2. Load Cell Simulator optional.
3. Computer with RS232/USB Interface for testing the RS232/USB communications.
4. RS232 Interface cable for i-DT33XW
5. Data Printer for use with RS232/USB communications.
1.3.2 Standard Tools and Test Equipment List
1. Standard Electronics Tool Kit
2. Digital Voltmeter (DVM), with clip on probes. Input impedance of at least 10 megohms in the 1
Volt dc position.
3. Soldering Iron, solder and flux remover.
4. ESD work station or mat.

EN-6 Defender 3000 Indicators Service Manual
1.4 Overview of Parts
1.4.1 Parts of i-DT33P
1.4.2 Parts of i-DT33XW
Note:
There are two types of load cell connector, one supports EasyConnectTM and one does not.
Therefore the load cell connector varies for different models.
For some i-DT33XW models, the position of load cell connector, strain relief for option and power
cord may change. Please refer to the actual product.

Defender 3000 Indicators Service Manual EN-7
1.4.3 Main PCB

EN-8 Defender 3000 Indicators Service Manual
1.5 Control Functions
i-DT33P Control Panel i-DT33XW Control Panel

Defender 3000 Indicators Service Manual EN-9

EN-10 Defender 3000 Indicators Service Manual
1.6 External Connections
This section of the manual explains the external connection of the product.
1.6.1 Battery Power Supply
i-DT33P
Use 6 C size dry batteries (not included).
In some regions, the i-DT33P model comes with one lead-acid battery installed by factory.
Note: You can contact an authorized OHAUS dealer to buy the lead-acid battery as an option.
i-DT33XW
This model comes with one lead-acid battery installed by factory default.
Note: The lead-acid battery will charge automatically while connecting to the power supply. When charging,
the battery level indicator increases or decreases in one grid, two grids, three grids and four grids. The
battery level indicator will disappear when the battery is fully charged.
While operating on battery, the battery symbol indicates the battery status:
Battery 5%~25% remaining
Battery 25%~50% remaining
Battery 50%~75% remaining
Battery 75%~100% remaining
Attention: Before using the indicator for the first time, the internal rechargeable battery should
be fully charged for up to 12 hours. The indicator can be operated during the charging process.
The battery is protected against overcharging and the indicator can remain connected to the
AC power line.
CAUTION: BATTERY IS TO BE REPLACED ONLY BY AN AUTHORIZED OHAUS SERVICE
DEALER. RISK OF EXPLOSION CAN OCCUR IF THE RECHARGEABLE BATTERY IS
REPLACED WITH THE WRONG TYPE OR IF IT IS NOT PROPERLY CONNECTED.
Dispose of the lead acid battery according to local laws and regulations.
1.6.2 AC Power to i-DT61XWE
Connect the AC plug to an electrical outlet to power on the indicator. Connect the other end to the indicator
if not connected.

Defender 3000 Indicators Service Manual EN-11
1.7 Internal Connections
Some internal connections require to open the housing first. Therefore, please check the Open the
Housing section below before making connections.
CAUTION: ELECTRICAL SHOCK HAZARD. REMOVE ALL POWER CONNECTIONS TO
THE INDICATOR BEFORE SERVICING OR MAKING INTERNAL CONNECTIONS. THE
HOUSING SHOULD ONLY BE OPENED BY AUTHORIZED AND QUALIFIED PERSONNEL,
SUCH AS AN ELECTRICAL TECHNICIAN.
1.7.1 Load cell connection EasyConnectTM Indicator
To connect an OHAUS EasyConnectTM scale base to an i-DT33P or an i-DT33XW EasyConnectTM indicator,
plug the base's connector into the external load cell connector located at the back (i-DT33P) or bottom (i-
DT33XW) of the indicator. Then rotate the base connector’s locking ring in the direction of the arrows
demonstrated below.
Note: For connecting bases which do not support EasyConnectTM to an EasyConnectTM indicator, contact
an authorized OHAUS dealer to obtain a load cell cable gland kit (P/N 30379716) as an accessory.
1.7.2 Load cell connection Non-EasyConnectTM Indicator
To connect a non-EasyConnectTM scale base to an i-DT33P or an i-DT33XW non-EasyConnectTM indicator,
follow the instruction in Open the Housing section to open the housing first before proceeding.
Note: For connecting EasyConnectTM bases to a non-EasyConnectTM indicator, contact an authorized
OHAUS dealer to obtain a load cell cable gland kit (P/N 30427858) as an accessory.
i-DT33P
i-DT33XW

EN-12 Defender 3000 Indicators Service Manual
i-DT33P
1. After opening the housing, release the load cell connector (circled) on the rear of the indicator and then
pass the load cell cable through it.
2. Connect all the cables on the load cell cable to the load cell terminal block on the mainboard (circled).
Please refer to the Load Cell Terminal Block section.

Defender 3000 Indicators Service Manual EN-13
i-DT33XW
1. After opening the housing, unplug the battery connectors (circled) and take out the battery.
2. Unscrew the two screws on the sealing cover (circled), take out the cover, and then take out the first
layer of the built-in housing

EN-14 Defender 3000 Indicators Service Manual
3. Release the load cell connector (circled) on the bottom of the indicator and then pass the load cell
cable through it.
4. Connect all the cables on the load cell cable to the load cell terminal block on the mainboard (circled).
Please refer to the Load Cell Terminal Block section for details of the connections.

Defender 3000 Indicators Service Manual EN-15
Load Cell Terminal Block
Proceed with the previous section, to connect the load cell terminal block, first locate it on the mainboard
following the instruction in the previous two sections for the two models.
After finding the load cell terminal block, check table 2-1 for the definition of each terminal screw connection
and make connections based on it. Please note that when using four-wire load cells, jumpers (the two short
wires supplied) must be placed between the +Excitation (+EXE) and +Sense (+SEN) terminals and
between the -Excitation (-EXE) and -Sense (-SEN) terminals.
The i-DT33P and i-DT33XW indicators are designed to support both 2mV/V and 3mV/V load cells from the
same circuitry. A load cell output rating selection jumper is not required.
Installing the Ferrite Core
In order to meet certain electrical noise emission limits and to protect i-DT33P and i-DT33XW from external
influences, it is necessary to install a ferrite core on the load cell cable connected to the indicator. The ferrite
core is supplied.
To install it, simply route the cable through the center of the core. Either the complete cable or the individual
wires can be wrapped through it.
Figure Ferrite Core
Number
Connection
1
+EXE
2
+SEN
3
+SIG
4
GND
5
-SIG
6
-SEN
7
-EXE
Figure Load Cell Terminal Block
1
2
3
4
5
6
7
Table Jumper Connections

EN-16 Defender 3000 Indicators Service Manual
1.7.3 RS232 Connection i-DT33P
Connect the optional RS232 cable to the RS232 connector on the rear housing of the i-DT33P indicator.
Please refer to table 2-2 for the definition of each pin if needed.
1.7.4 RS232 Connection i-DT33XW
For i-DT33XW model, to make the RS232 connection:
1. Open the rear housing. Please refer to Open the Housingsection for how to open the rear housing.
2. Take out the battery. Please refer to the i-DT33XW sub-section of Non-EasyConnectTM Indicator
section for how to take out the battery.
3. Release the strain relief for option connector on the bottom of the indicator and remove the plug on it.
4. Pass the optional RS232 cable 30427860 through the connector and attach it to the RS232 terminal
block on the mainboard.
Pin
Connection
1
N/C
2
TXD
3
RXD
4
N/C
5
GND
6
N/C
7
N/C
8
N/C
9
N/C
RS232 Connector
Figure i-DT33XW RS232 Connection
Table RS232 Pins
Figure i-DT33P RS232 Connector

Defender 3000 Indicators Service Manual EN-17
1.8 Mounting Bracket
Attach the bracket to a wall or table using fasteners (not supplied) that are appropriate for the type of
mounting surface. The bracket will accommodate up to 6 mm (1/4”) diameter screws. Locate the mounting
holes as shown below.
RS232
terminal block
Figure i-DT33P Mounting Bracket Dimensions
Figure i-DT33XW Mounting Bracket Dimensions

EN-18 Defender 3000 Indicators Service Manual
2 MENU SETTINGS
The User Menu allows the customizing of scale settings.
Note: Sub-menu for options (USB, Ethernet and Print2 in the table below) will be active only when the
specific board is installed. See their separate option instruction manuals for additional setting information.
2.1 Menu Navigation
C.A.L
S.E.t.U.P
r.E.A.d
mM.O.d.E
U.n.I.t
R.s.2.3.2
P.r.I.N.t
U.S.B
E.t.H.N.E.t
P.r.I.N.t2
L.o.c.k
E.n.d
ZErO
SpaN
LINE
GEO
C.test
End
reset
C.UNIt
rANGE
CAP1
Grad1
CAP2
Grad2
P.ZerO
P.UNIt
A.tare
End
reset
Stable
ZErO
FIltEr
AZt
B.LIGHt
b.COLOr
SCreeN
A.Off
P.SAuEr
CEC
End
reset
wWeIGH
COUNt
CHECK
tOtAL
tABLE
End
reset
kg
g
lb
oz
lb:oz
t
End
reset
BAUd
PArItY
StOP
H.SHAKE
ALt.P
ALt.t
ALt.Z
End
reset
ASSIGN
Stable
mMODE
tImME
lINkto
C.SUmM
tEmMp
End
reset
BAUd
PArItY
StOP
H.SHAKE
ALt.P
ALt.t
ALt.Z
ENd
reset
IP.Addr
u.E.r.
ENd
reset
ASSIGN
Stable
mMODE
tImME
lINkto
C.SUmM
tEmMp
ENd
reset
L.ALL
L.OFF
L.ZErO
L.PrINt
L.UNIt
L.mModE
L.mMeNU
L.tArE
End
Notes:
Some modes/units may not be available in all models.
When LEGAL FOR TRADE is turned ON (the security switch S1 is in the locked position), the menu settings
will be affected as below:
Calibration function is disabled.
Zero Range setting is locked at 2%.
Stable Range setting is locked at 1d.
Auto-Zero Tracking setting is locked at 0.5d.
Filter and Units are locked at their current settings.
Stable Only is locked at On.
Lb:oz unit is locked at Off.
Power saving mode is disabled.
Note: Please refer to Legal for Trade chapter for the position of the security switch S1.