Ohaus GT4100DG User Manual
Ohaus Corporation
29 Hanover Road
Florham Park NJ
07932-0900
PRECISION
Electronic Balances
Models
GT4100G and GT4100DG
Advanced
Instruction Manual
NOTE:NOTE:
NOTE: THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH
NOTE:NOTE:
THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF
THE FCC RULES.
THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION
AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED
IN A COMMERCIAL ENVIRONMENT. THIS EQUIPMENT GENERATES, USES,
AND CAN RADIATE RADIO FREQUENCY ENERGY AND, IF NOT INSTALLED
AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL, MAY CAUSE
HARMFUL INTERFERENCE TO RADIO COMMUNICATIONS. OPERATION OF
THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE HARMFUL
INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO CORRECT THE INTERFERENCE AT HIS OWN EXPENSE.
THIS DIGITAL APPARATUS DOES NOT EXCEED THE CLASS A LIMITS FOR
RADIO NOISE EMISSIONS FROM DIGITAL APPARATUS AS SET OUT IN THE
INTERFERENCE-CAUSING EQUIPMENT STANDARD ENTITLED “DIGITAL APPARATUS”, ICES-003 OF THE DEPARTMENT OF COMMUNICATIONS.
CET APPAREIL NUMERIQUE RESPECTE LES LIMITES DE BRUITS
RADIOELECTRIQUES APPLICABLES AUX APPAREILS NUMERIQUES DE
CLASSE A PRESCRITES DANS LA NORME SUR LE MATERIEL BROUILLEUR :
“APPAREILS NUMERIQUES”, NMB-003 EDICTEE PAR LE MINISTRE DES COMMUNICATIONS.
Unauthorized changes or modifications to this equipment are not permitted.
The exclamation
point within the triangle is a warning
sign alerting you of
important instructions accompanying the product.
2
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
INTRODUCTION.................................................................................................. 7
DESCRIPTION ..................................................................................................... 7
FEATURES .......................................................................................................... 7
UNPACKING ........................................................................................................ 8
INSTALLATION .................................................................................................... 8
Environment .................................................................................................. 8
Leveling the Balance..................................................................................... 8
Power Requirements..................................................................................... 9
Voltage Setting .............................................................................................. 9
Platform and Platform Support ...................................................................... 9
OPERATION ...................................................................................................... 10
Switch Functions ......................................................................................... 10
Symbols Used for Operation of the Balance ............................................... 11
Navigating the Menus ................................................................................. 12
Turning the Balance On .............................................................................. 13
Display Indications ...................................................................................... 13
Stabilization................................................................................................. 14
Moveable FineRange
Weighing ..................................................................................................... 14
ReZero ........................................................................................................ 14
Test Weight Mode ....................................................................................... 15
Dockage Mode ............................................................................................ 15
Entering and Reentering Dockage Mode .................................................... 16
FUNCTIONS AND MODES OF OPERATION ................................................... 17
CALIBRATION MENU ........................................................................................ 18
Calibration Menu Protection ........................................................................ 18
Calibration Masses...................................................................................... 18
Span Calibration.......................................................................................... 19
Linearity Calibration .................................................................................... 19
User Calibration .......................................................................................... 20
Cal Test....................................................................................................... 20
USER MENU ...................................................................................................... 21
User Menu Protection ................................................................................. 22
Reset ........................................................................................................... 22
Averaging Level .......................................................................................... 22
TM
(Model GT4100DG) .............................................. 14
3
Stability Range ............................................................................................ 23
Auto-Zero .................................................................................................... 24
Beep Function ............................................................................................. 24
SETUP MENU .................................................................................................... 25
Setup Menu Protection................................................................................ 26
Reset ........................................................................................................... 26
Type Approved/LFT .................................................................................... 27
Unit Selection .............................................................................................. 27
Good Laboratory Practices...................................................................... 29
Time ............................................................................................................ 29
Date............................................................................................................. 30
Lockswitch................................................................................................... 31
List............................................................................................................... 32
PRINT MENU ..................................................................................................... 32
Print Menu Protection.................................................................................. 33
Reset ........................................................................................................... 33
Communication ........................................................................................... 33
Baud Rate................................................................................................ 34
Data Bits .................................................................................................. 34
Parity ....................................................................................................... 34
Stop Bits .................................................................................................. 35
Good Laboratory Practices (GLP)............................................................... 35
Print Options ............................................................................................... 36
Auto Print Feature ................................................................................... 36
Initialize.................................................................................................... 36
Print Stable Data Only ............................................................................. 38
Print Numeric Data Only.......................................................................... 38
Time......................................................................................................... 39
Date ......................................................................................................... 39
Reference ................................................................................................ 39
List............................................................................................................... 40
MENU LOCK-OUT PROTECTION..................................................................... 40
TYPE APPROVED BALANCE SEALING........................................................... 41
4
RS232 INTERFACE ........................................................................................... 42
Hardware..................................................................................................... 42
Output Formats ........................................................................................... 42
RS232 Commands ...................................................................................... 42
CARE AND MAINTENANCE.............................................................................. 45
TROUBLESHOOTING ....................................................................................... 45
Error Codes List .......................................................................................... 46
SERVICE INFORMATION ................................................................................. 47
PARTS INFORMATION ..................................................................................... 48
REPLACEMENT PARTS ................................................................................... 48
ACCESSORIES ................................................................................................. 48
SPECIFICATIONS ............................................................................................. 49
LIMITED WARRANTY........................................................................................ 51
5
6
INTRODUCTIONINTRODUCTION
INTRODUCTION
INTRODUCTIONINTRODUCTION
This manual covers Installation, Operation and Troubleshooting for the Ohaus Precision Advanced Series of Electronic balances, Models GT4100G, and GT4100DG.
Suffixes after the basic model number are: D = Moveable FineRange
Applications. To ensure proper operation of the balance, please read this manual
completely.
DESCRIPTIONDESCRIPTION
DESCRIPTION
DESCRIPTIONDESCRIPTION
The Ohaus Precision Advanced GT Series balances are precision weighing instruments, designed to be versatile, accurate, easy to operate and will provide years of
service with virtually no maintenance. The Precision Advanced series is constructed
using a die-cast aluminum base finished with a durable corrosion resistant epoxy
powder paint. It contains solid-state precision electronics PC boards, and a seven and
a half, 0.45 inch digit, Vacuum Fluorescent display. Each balance operates through
a series of menus which enhances operation. A built in lockswitch prevents preset
settings from being changed.
TM
, G=Grain
FEATURES
Precision Advanced balances contain four main display menus which enable you to
calibrate and configure the balance for specific operating requirements.
MENU MENU
MENU When
MENU MENU
access to the calibration, user, setup and print menus..
switch is pressed and released with MENU displayed, allows
CALIBRATIONCALIBRATION
CALIBRATION Menu - Allows the balance to be calibrated by using either Span ,
CALIBRATIONCALIBRATION
User or Linearity calibration methods. A Test function is used to verify the last
calibration.
USERUSER
USER Menu - Allows the balance to be set for environmental conditions. Reset,
USERUSER
averaging level, stability range, auto-zero and beep (sound) functions can be set.
SETUPSETUP
SETUP Menu - Allows the balance to be customized for specific weighing functions.
SETUPSETUP
PRINTPRINT
PRINT Menu - Allows the selection of parameters under which the balance will
PRINTPRINT
interface to a computer or a printer.
Each of these menus contain selectable parameters which can be entered via the front
panel switches. Storing of the parameters is accomplished by selecting
completion of all selections in a particular menu. For a detailed description of each
feature, refer to the individual menus in this manual.
7
EndEnd
End
EndEnd
at the
UNPACKINGUNPACKING
UNPACKING
UNPACKINGUNPACKING
Your Precision Advanced balance was shipped with the following items:
• Platform
• Platform Support
• Power Cord
• Instruction Manual
• Warranty Card
• In-Service Cover
• Sealing Kit
It is recommended to save the carton and packing material for storing, transporting the
balance or returning it for service.
INSTALLATIONINSTALLATION
INSTALLATION
INSTALLATIONINSTALLATION
EnvironmentEnvironment
Environment
EnvironmentEnvironment
The balance should always be used in an environment which is free from excessive air
currents, corrosives, vibration, and temperature or humidity extremes. These factors
will affect displayed weight readings.
DO NOTDO NOT
DO NOT install the balance:
DO NOTDO NOT
• 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.
PLATE
Leveling the BalanceLeveling the Balance
Leveling the Balance
Leveling the BalanceLeveling the Balance
The balance is equipped with a level indicator located at the rear of the balance and two
adjustable leveling feet. The leveling feet
are located under the front of the balance.
Adjust the leveling feet until the bubble appears in the center circle of the indicator.
LEVEL INDICATOR
8
Power RequirementsPower Requirements
Power Requirements
Power RequirementsPower Requirements
WARNING
To avoid shock hazards, always be certain that the power cord is disconnect-To avoid shock hazards, always be certain that the power cord is disconnect-
•
To avoid shock hazards, always be certain that the power cord is disconnect-
To avoid shock hazards, always be certain that the power cord is disconnect-To avoid shock hazards, always be certain that the power cord is disconnected BEFORE removing the balance cover.ed BEFORE removing the balance cover.
ed BEFORE removing the balance cover.
ed BEFORE removing the balance cover.ed BEFORE removing the balance cover.
Even though the balance may have been switched OFF, high voltage isEven though the balance may have been switched OFF, high voltage is
•
Even though the balance may have been switched OFF, high voltage is
Even though the balance may have been switched OFF, high voltage isEven though the balance may have been switched OFF, high voltage is
present inside the balance as long as the power cord is connected.present inside the balance as long as the power cord is connected.
present inside the balance as long as the power cord is connected.
present inside the balance as long as the power cord is connected.present inside the balance as long as the power cord is connected.
A power cord has been furnished with the balance. DO NOT use any otherA power cord has been furnished with the balance. DO NOT use any other
•
A power cord has been furnished with the balance. DO NOT use any other
A power cord has been furnished with the balance. DO NOT use any otherA power cord has been furnished with the balance. DO NOT use any other
type of power cord other than the one furnished.type of power cord other than the one furnished.
type of power cord other than the one furnished.
type of power cord other than the one furnished.type of power cord other than the one furnished.
DO NOT create a safety hazard by defeating the grounding feature.DO NOT create a safety hazard by defeating the grounding feature.
DO NOT create a safety hazard by defeating the grounding feature.
DO NOT create a safety hazard by defeating the grounding feature.DO NOT create a safety hazard by defeating the grounding feature.
Voltage SettingVoltage Setting
Voltage Setting
Voltage SettingVoltage Setting
The balance can be damaged if operated
at an incorrect line voltage. If, for any
reason the balance
operate at your particular line voltage, it
may be checked in the following manner:
1. Locate the fuse holder in the lower
right-hand corner of the balance (when
viewed from the rear).
2. There is an arrow imprinted above the
fuse holder and the voltage (100, 120,
220 or 240) below the arrow indicates
the line voltage. See illustration.
3. If the balance is NOT set for operation
at the correct line voltage, remove the
power cord and pry the fuse holder
loose by inserting a small screwdriver
blade in the slot. Remove the fuse
holder and rotate it to the proper position with the correct line voltage lining
up with the arrow. If neccessary,
install the correct fuse for the required
line voltage. (See Replacement Parts
List for fuse rating).
HAS NOTHAS NOT
HAS NOT been set to
HAS NOTHAS NOT
SLOT
4. Insert the fuse holder.
Platform and Platform SupportPlatform and Platform Support
Platform and Platform Support
Platform and Platform SupportPlatform and Platform Support
Insert the Platform Support into the hole in
the weighing mechanism as shown in the
illustration.
Place the Platform on the Platform Support making sure the Platform is properly
centered.
PLATFORM
PLATFORM
SUPPORT
9
OPERATIONOPERATION
OPERATION
OPERATIONOPERATION
Switch FunctionsSwitch Functions
Switch Functions
Switch FunctionsSwitch Functions
Press and ReleasePress and Release
Press and Release:
Press and ReleasePress and Release
Turns on the balance if it is off, zeros the balance. Clears the dockage
memory. In the menu system, this button is used to accept a choice
or enter a submenu.
Extended PressExtended Press
Extended Press:
Extended PressExtended Press
Used to access the calibration, user, setup and print menus.
Press and ReleasePress and Release
Press and Release:
Press and ReleasePress and Release
Cycles balance through (g, oz, lb) weighing units that are enabled
and dockage (not Test Weight). If no valid dockage reference exists,
dockage will be skipped. In the menu system, this button is used to
change the indicated selection or move forward to the next menu
choice.
Extended PressExtended Press
Extended Press:
Extended PressExtended Press
Turns the balance off.
Press and ReleasePress and Release
Press and Release:
Press and ReleasePress and Release
Pressing this button will momentarily display the current memory
weight.
Extended PressExtended Press
Extended Press:
Extended PressExtended Press
Takes the current net weight on the platform and sets this value as the
100 percent memory value. Balance then indicates load as a
percentage of this value.
Press and ReleasePress and Release
Press and Release:
Press and ReleasePress and Release
Puts the balance in test weight mode. (Note that this requires a
calibrated volume container. In the menu system, moves the menu
in reverse order.
Extended PressExtended Press
Extended Press:
Extended PressExtended Press
Prints value on the display according to Print Menu settings.
10
Symbols Used for Operation of the BalanceSymbols Used for Operation of the Balance
Symbols Used for Operation of the Balance
Symbols Used for Operation of the BalanceSymbols Used for Operation of the Balance
This instruction manual uses certain symbols to explain various operational procedures and actions that occur. Examples of the symbols used are shown as follows:
Pushbutton SwitchesPushbutton Switches
Pushbutton Switches:
Pushbutton SwitchesPushbutton Switches
=
=
Display Area Display Area
Display Area:
Display Area Display Area
NORMAL PRESS AND RELEASENORMAL PRESS AND RELEASE
NORMAL PRESS AND RELEASE
NORMAL PRESS AND RELEASENORMAL PRESS AND RELEASE
MULTIPLE PRESSESMULTIPLE PRESSES
MULTIPLE PRESSES
MULTIPLE PRESSESMULTIPLE PRESSES
PRESS AND HOLD FOR DESIRED DISPLAYPRESS AND HOLD FOR DESIRED DISPLAY
=
PRESS AND HOLD FOR DESIRED DISPLAY
PRESS AND HOLD FOR DESIRED DISPLAYPRESS AND HOLD FOR DESIRED DISPLAY
DISPLAY AREA - AS A RESULT OF USER ACTIONDISPLAY AREA - AS A RESULT OF USER ACTION
DISPLAY AREA - AS A RESULT OF USER ACTION
DISPLAY AREA - AS A RESULT OF USER ACTIONDISPLAY AREA - AS A RESULT OF USER ACTION
DISPLAY AREA - AUTO CHANGE OCCURSDISPLAY AREA - AUTO CHANGE OCCURS
DISPLAY AREA - AUTO CHANGE OCCURS
DISPLAY AREA - AUTO CHANGE OCCURSDISPLAY AREA - AUTO CHANGE OCCURS
11
NANA
VIGAVIGA
NA
VIGA
NANA
VIGAVIGA
Three buttons on the balance are used to navigate through the menus.
Performs three functions:
1. When intially pressed turns the balance on.
2. When the balance is on, pressing and holding this button will
alternate the display from MENU to a weighing mode.
3. When in any menu, pressing this button will accept menu selection.
Performs two functions:
1. Sucessive presses will step through the menu selections.
2. When pressed and held, turns balance off.
When in the menus, each press moves the menu in reverse order.
TING TING
TING
TING TING
THE MENUSTHE MENUS
THE MENUS
THE MENUSTHE MENUS
WITH THE BALANCE TURNED ON
STEPS 1STEPS 1
STEPS 1.
STEPS 1STEPS 1
START START
START
START START
3. 3.
3.
3. 3.
DISPLAYDISPLAY
DISPLAY
DISPLAYDISPLAY
5A.BACKS UP
MENUMENU
MENU
MENUMENU
TO TO
TO
TO TO
NEXT DISPLAY NEXT DISPLAY
NEXT DISPLAY
NEXT DISPLAY NEXT DISPLAY
5. 5.
5.
5. 5.
TO TO
TO
TO TO
NEXT DISPLAY NEXT DISPLAY
NEXT DISPLAY
NEXT DISPLAY NEXT DISPLAY
7. 7.
7.
7. 7.
TO TO
TO
TO TO
END END
END
END END
12
ADVANCES ADVANCES
ADVANCES
ADVANCES ADVANCES
2.2.
2.
2.2.
ADVANCES ADVANCES
ADVANCES
ADVANCES ADVANCES
4. ACCEPTS
ADVANCES ADVANCES
ADVANCES
ADVANCES ADVANCES
6. ACCEPTS
88
8.
88
STORES
ACCEPTSACCEPTS
ACCEPTS
ACCEPTSACCEPTS
ACCEPTS &ACCEPTS &
ACCEPTS &
ACCEPTS &ACCEPTS &
Turning the Balance ONTurning the Balance ON
Turning the Balance ON
Turning the Balance ONTurning the Balance ON
1. With no load on the platform, connect the power cord to a suitable power source.
The balance signals one long beep to indicate power has been applied.
2.
Display IndicationsDisplay Indications
Display Indications
Display IndicationsDisplay Indications
The following table describes each of the display indicators.
DISPLAY INDICATORSDISPLAY INDICATORS
DISPLAY INDICATORS
DISPLAY INDICATORSDISPLAY INDICATORS
g g
g grams
g g
ozoz
oz ounces
ozoz
%%
% (dockage) F.M.
%%
SS
S stability indicator
SS
13
lblb
lb pounds
lblb
UNIT 1UNIT 1
UNIT 1 lb/bu
UNIT 1UNIT 1
OO
O center of zero
OO
%S%S
%S memory set display
%S%S
StabilizationStabilization
Stabilization
StabilizationStabilization
Before initally using the balance, allow time for it to adjust to its new environment. The
balance only requires to be plugged in to warm up. Recommended warm up period
is twenty (20) minutes. The balance is powered whenever it is plugged into a power
source.
TMTM
TM
Moveable FineRangeMoveable FineRange
Moveable FineRange
Moveable FineRangeMoveable FineRange
Model GT4100DG contains a Moveable FineRangeTM feature.
When the weight of the object on the platform exceeds the capacity limit of the
Moveable FineRangeTM, the balance will automatically change to the coarse range.
To return to the fine range:
1.The load is reduced to below the capacity limit of the fine range.
2. .
WeighingWeighing
Weighing
WeighingWeighing
1. to rezero the display.
2.Place the object(s) or material to be weighed on the platform.
3.Wait for the stability indicator to appear before reading the weight.
STABILITY INDICATOR
TMTM
(Model GT4100DG) (Model GT4100DG)
(Model GT4100DG)
(Model GT4100DG) (Model GT4100DG)
CENTER OF ZERO
Re-ZeroRe-Zero
Re-Zero
Re-ZeroRe-Zero
When weighing material or objects that must be held in a container, zeroing stores the
container weight in the balance’s memory, separate from the weight of the material in
the container.
1.Place an empty container on the platform. Its weight is displayed.
2. , the display blanks until stable weight readings are received, then
indicates zero. The container’s weight is stored in memory.
3.Add material to the container. As material is added, its net weight is displayed.
4.Removing the container and material from the platform will cause the balance
to display the container’s weight as a negative number.
5. resets the balance to zero.
14
Test Weight ModeTest Weight Mode
Test Weight Mode
Test Weight ModeTest Weight Mode
A quart measure is required for this procedure. Test Weight in lb/bu is calculated as
follows:
sample wt. (g) x 0.0705479 = test wt. (lb/bu)
1.
2.Place an empty quart container on the platform,
3.Remove the container, fill it with sample material and place it on the platform.
4.To return to standard weighing mode,
Dockage ModeDockage Mode
Dockage Mode
Dockage ModeDockage Mode
NOTENOTE
NOTE: The minimum sample weight which can be used for dockage mode is 120
NOTENOTE
grams. A smaller sample size will display Err 7.1
1.With the balance in any weighing mode, place an empty container on the
2.Fill the container with the sample material to the desired weight (100% value).
3.
.
balance.
Weight is displayed in lb/bu (Unit 1).
platform,
to rezero the balance.
to rezero the
.
4.Remove the sample and process it to remove any dockage material.
NOTENOTE
NOTE: While the sample is being processed, the balance may be used in other
NOTENOTE
weighing modes without disturbing the weight stored in memory. See Exiting and
Reentering Dockage Mode.
5.Fill the container with the material from which the dockage (foreign material) has
been removed and place on the platform. The balance will display the weight
of the dockage material as a
NOTENOTE
NOTE: If the balance is rezeroed while using other weighing modes, the initial zero
NOTENOTE
reference (established in the dockage procedure) will be lost. When you reenter the
dockage mode,
on the platform before weighing the dockage material.
YOU MUST REZERO THE BALANCE YOU MUST REZERO THE BALANCE
YOU MUST REZERO THE BALANCE again with the empty container
YOU MUST REZERO THE BALANCE YOU MUST REZERO THE BALANCE
percentage of the original sample weighpercentage of the original sample weigh
percentage of the original sample weight.
percentage of the original sample weighpercentage of the original sample weigh
15
Exiting and Reentering Dockage ModeExiting and Reentering Dockage Mode
Exiting and Reentering Dockage Mode
Exiting and Reentering Dockage ModeExiting and Reentering Dockage Mode
If it desired to use the balance for other weighing modes while a dockage sample is
being processed, perform the following steps:
1.To access other weighing modes,
2.To reenter the dockage mode,
appears.
for desired display.
until
16
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