Instruction Manual

PRECISION Advanced

Electronic Balances

GT Series

Ohaus Corporation

29 Hanover Road

Florham Park NJ

07932-0900
2

The exclamation

point within the triangle is a warning

sign alerting you of

important instructions accompanying the product.

NOTE: THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH

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.
3

TABLE OF CONTENTS TABLE OF CONTENTSTABLE OF CONTENTS

INTRODUCTION.................................................................................................. 7

DESCRIPTION ..................................................................................................... 7

FEATURES .......................................................................................................... 7

UNPACKING ........................................................................................................ 8

INSTALLATION .................................................................................................... 8

Environment .................................................................................................. 8

Below Balance Hook ..................................................................................... 8

Leveling the Balance..................................................................................... 9

Power Requirements .................................................................................... 9

Voltage Setting.............................................................................................. 9

Draft Shield (Models GT210, GT410 and GT4100D) ................................. 10

Platform and Platform Support ................................................................... 10

Model GT8000T Tower Assembly Installation............................................ 10

RS232 Interface .......................................................................................... 11

Hardware ................................................................................................. 11

Output Formats ....................................................................................... 11

RS232 Commands...................................................................................... 11

OPERATION ...................................................................................................... 14

Switch Functions ......................................................................................... 14

Symbols Used for Operation of the Balance .............................................. 15

Navigating the Menus ................................................................................. 16

Operational Guide/Index ............................................................................. 17

Turning the Balance On .............................................................................. 18

Display Indications ...................................................................................... 19

Stabilization ................................................................................................. 19

Moveable FineRangeTM (Models GT410D and GT4100D) ......................... 19

Weighing ..................................................................................................... 20

Zero/Tare .................................................................................................... 20

Auto Tare .................................................................................................... 20

Percent Weighing........................................................................................ 21

Parts Counting ............................................................................................ 22

Check Weighing .......................................................................................... 23

Animal Weighing ......................................................................................... 24

Fill Guide ..................................................................................................... 25

Reference Weight ................................................................................... 25
4

Reference Number .................................................................................. 26

High Point.................................................................................................... 26

Printing Data ............................................................................................... 27

Time and Date ......................................................................................... 27

List ........................................................................................................... 28

Span Calibration Printout ........................................................................ 29

Linearity Calibration Printout ................................................................... 29

Calibration Test Printout .......................................................................... 29

Statistics Printout .................................................................................... 30

Sampling .................................................................................................. 30

Percent Weighing .................................................................................... 31

Parts Counting ......................................................................................... 31

Check Weighing ...................................................................................... 32

FillGuideTM ................................................................................................ 32

MENUS .............................................................................................................. 33

MENU LOCK-OUT PROTECTION .................................................................... 34

TYPE APPROVED BALANCE SEALING .......................................................... 36

CALIBRATION MENU........................................................................................ 36

Calibration Menu Protection ....................................................................... 36

Calaibration Masses ................................................................................... 36

Span Calibration ......................................................................................... 37

Linearity Calibration ................................................................................... 37

User Calibration .......................................................................................... 38

Cal Test ....................................................................................................... 38

USER MENU ...................................................................................................... 39

User Menu Protection ................................................................................. 39

Reset ........................................................................................................... 40

Averaging Level .......................................................................................... 40

Stability Range ............................................................................................ 41

Auto-Zero .................................................................................................... 41

Beep Function ............................................................................................. 42

Exiting User Menu....................................................................................... 42
5

SETUP MENU .................................................................................................... 42

Setup Menu Protection ............................................................................... 44

Reset ........................................................................................................... 44

Type Approved/LFT .................................................................................... 45

Unit Selection .............................................................................................. 45

Functions..................................................................................................... 46

Statistics ...................................................................................................... 47

Net ............................................................................................................... 48

Auto Tare .................................................................................................... 48

Custom Unit or Volume Selection............................................................... 49

Operating Procedure ............................................................................... 50

Good Laboratory Practices ......................................................................... 51

Parts Counting Error ................................................................................... 51

Check Weighing Options ............................................................................ 51

Sample Displays ......................................................................................... 53

Animal Weighing Options ........................................................................... 54

Fill Option .................................................................................................... 54

Time ............................................................................................................ 56

Date ............................................................................................................. 57

Lockswitch................................................................................................... 58

List ............................................................................................................... 59

Exit Setup Menu ......................................................................................... 59

PRINT MENU ..................................................................................................... 60

Print Menu Protection ................................................................................. 60

Reset ........................................................................................................... 61

Communication ........................................................................................... 61

Baud Rate ............................................................................................... 62

Data Bits .................................................................................................. 62

Parity ....................................................................................................... 62

Stop Bits .................................................................................................. 63

Good Laboratory Practices (GLP) .............................................................. 63

Print Options ............................................................................................... 64

Auto Print Feature ................................................................................... 64
6

Initialize .................................................................................................... 64

Print Stable Data Only ............................................................................. 66

Print Numeric Data Only ......................................................................... 66

Time ......................................................................................................... 66

Date ......................................................................................................... 67

Reference ................................................................................................ 67

Difference ................................................................................................ 67

List ........................................................................................................... 68

CARE AND MAINTENANCE ............................................................................. 69

TROUBLESHOOTING ....................................................................................... 69

Error Codes List .......................................................................................... 70

SERVICE INFORMATION ................................................................................. 72

REPLACEMENT PARTS ................................................................................... 72

ACCESSORIES ................................................................................................. 72

SPECIFICATIONS ............................................................................................. 73

LIMITED WARRANTY ....................................................................................... 75
7

INTRODUCTION

INTRODUCTION

This manual covers Installation, Operation and Troubleshooting for the Ohaus

Precision Advanced Series of Electronic balances, Models GT210, GT400, GT410,

GT2100, GT4000, GT4100, and GT8000. Suffixes after the basic model number are:

D = Moveable FineRangeTM, T=Tower Mount and V=Non Type Approved. Models with

an E suffix = Type Approved with CE conformance and bear official markings (Max,

Min, Class, etc.) on a serial number plate located on the side of the balance. To ensure

proper operation of the balance, please read this manual completely.

DESCRIPTION

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. To prevent measurements from being affected by air

currents, a Draft Shield is mounted to the balance and is standard with Models GT210,

GT410 and GT410D.

FEATURES

Precision Advanced balances contain four main display menus which enable you to

calibrate and configure the balance for specific operating requirements.

• MENU When switch is pressed and released with MENU displayed, allows

entry into other menus.

• CALIBRATION Menu - Allows the balance to be calibrated by using either Span

or Linearity calibration methods. A Test function is used to verify the last

calibration.

• USER Menu - Allows the balance to be set for environmental conditions. Reset,

averaging level, stability range, auto-zero and beep (sound) functions can be set.

• SETUP Menu - Allows the balance to be customized for specific weighing

functions.

• PRINT Menu - Allows the selection of parameters under which the balance will

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 End at the

completion of all selections in a particular menu. For a detailed description of each

feature, refer to the individual menus in this manual.
8

INSTALLATION

UNPACKING

Your Precision Advanced balance was shipped with the following items:

• Platform

• Platform Support

• Power Cord

• Below Balance Weighing Hook

• Draft Shield included with Models: GT210, GT410 and GT410D

• Instruction Manual

• Warranty Card

• In-Service Cover

• Sealing Kit (Type Approved/Legal for Trade)

It is recommended to save the carton and packing material for storing, transporting the

balance or returning it for service.

PLATE

INSTALLATION

Environment Environment

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 NOT install the balance:

• 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.

Below Balance Hook

A common application for this item is for

determination of density or specific gravity.

Mount the balance on a suitable surface

which allows below balance weighing. If the

below balance hook will be used, it may be

installed in the bottom of the balance. Remove the protective plug at the bottom of

the balance and screw the hook into the

threaded hole in the Platform Support which

is visible through the access hole in the

bottom of the balance.

BELOW BALANCE HOOK
9

INSTALLATION

Leveling 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.

NOTE: A level indicator and leveling feet are

not included on Models GT400, GT4000 and

GT8000.

LEVEL INDICATOR

SLOT

WARNING

Power Requirements

• To avoid shock hazards, always be

certain that the power cord is disconnected BEFORE removing the

balance cover. balance cover.

• Even though the balance may have

been switched OFF, high voltage is

present inside the balance as long

as the power cord is connected. as the power cord is connected.

• A power cord has been furnished

with the balance. DO NOT use any

other type of power cord other than

the one furnished. the one furnished.

DO NOT create a safety hazard by

defeating the grounding feature. defeating the grounding feature.

Voltage Setting

The balance can be damaged if operated

at an incorrect line voltage. If, for any

reason the balance HAS NOT been set to

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.
10

INSTALLATION

3. If you wish to change the line voltage setting, 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).

4. Insert the fuse holder.

DRAFT SHIELD

PLATFORM

PLATFORM

SUPPORT

Draft Shield (Models GT210, GT410

and GT 410D) and GT 410D)

To install the Draft Shield:

1. Remove the two existing screws and

washers located on top of the balance.

2. Position the Draft Shield on top of the

balance as shown.

3. Insert the two screws, with washers

(supplied with the Draft Shield) though

the holes in the Draft Shield into the

balance. Tighten both screws securely.

Platform and Platform Support Platform 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.

Model GT8000T Tower Assembly Installation

Remove the four (4) flat head screws from the mounting holes at the lower left (

when viewing the rear of the balance), and set them aside. Install the Tower

Assembly on the mounting holes using the screws. The Tower Display unit may

be tilted to the desired viewing angle. If the viewing angle is not going to be

changed, tighten the Hex Socket set screw at the lower left (when viewing the rear

of the Display Unit). The increased tension will prevent the Display Unit from

accidentally tilting.
11

INSTALLATION

PRINT *

1 5VDC (5 mA max.)

2 Data Out (TXD)

3 Data In (RXD)

4* Tare (External signal)

5 Clear To Send (CTS)

6 Data Terminal Ready (DTR)

7 Ground

8 Request To Send (RTS)

9* Print (External signal)

* External PRINT and/or TARE

switches may be installed as shown

in the diagram. Momentary contact

switches must be used.

TARE *

Output Formats

Data output can be initiated in one of three

ways: 1) By pressing PRINT; 2) Using the

Auto Print feature; 3) Sending a print

command (“P”) from a computer.

The output format is illustrated in the

RS232 command table which follows.

RS232 Commands

All communication is accomplished using

standard ASCII format. Only the characters shown in the following table are acknowledged by the balance. Any other

commands, control characters or spaces

are ignored. Commands sent to the

balance must be terminated with a carriage return (CR) or carriage return-line

line feed (CRLF). For example, a tare

command should appear as shown in the

adjacent diagram. Data output by the

balance is always terminated with a carriage return - line feed (CRLF).

RS232 INTERFACE

Precision Advanced balances are equipped with a bi-directional RS232 compatible

interface for communication with printers and computers. When the balance is

connected directly to a printer, displayed data can be output at any time by simply

pressing PRINT, or by using the Auto Print feature.

Connecting the balance to a computer enables you to operate the balance from the

computer, as well as receive data such as displayed weight, weighing mode,

stability status, etc.

The following sections describe the hardware and software provided with the

balance.

Hardware

On the rear of the balance, a 9-pin subminiature “D” connector is provided for

interfacing to other devices. The pinout

and pin connections are shown in the

adjacent illustration.

The balance will not output any data

unless pin 5 (CTS) is held in an ON state

(+3 to +15 VDC). Interfaces not utilizing

the CTS handshake may tie pin 5 to pin 6

to defeat it.
12

INSTALLATION

Command

Character Description

? Print current mode

nnnA Set Auto Print feature to “nnn”

(see table).

C Begin span calibration

xD Set 1 second print delay (set x = 0 for OFF, or x = 1 for ON)

E Exit parts counting or percent weighing

xI Set Averaging Level to “x”,

where x = 0 to 3 (see table).

L Begin linearity calibration

M Same effect as pressing mode button

xM Places balance in mode “x”,

where x = 1 to 13 (see table).

If unit or mode is not already

enabled, command will be ignored.

RS232 COMMAND TABLE

Field: Mode Stab CR LF

Length: 5 1 1 1

blank if stable

“ ? ” if unstable

1 = grams

2 = pennyweight

3 = carats

4 = avoidupois ounces

5 = troy ounces

6 = grains

7 = taels

8 = momme

9 = pounds

10 = pounds:ounces

11 = custom unit

12 = parts counting

13 = percent weighing

nnn = 0 Turns feature OFF

nnn = S Output on stability

nnn = C Output is continuous

nnn = 1-256 Sets Auto Print

Interval

0 = minimum level

1 =

2 =

3 = maximum level

Grams

Pennyweight

Carats

Avoidupois ounces

Troy ounces

Grains

Taels

Momme

Pounds

Pounds:ounces

Custom unit

Parts counting

Percent weighing

Error
13

INSTALLATION

Command

Character Description

P Print display data

When “numeric only” display

data is selected for output in

the RS232 menu, the Mode

field is not output.

xS Set stable data only printing (set x = 0 for OFF, or x = 1 for ON).

T Same effect as pressing rezero button

V Print EPROM version

xZ Set Auto Zero to “x”,

where x = 0 to 3 (see table).

x% Downloads reference weight “x” for percent mode. “x” must be in grams.

Command is ignored if percent mode is disabled. If percent mode is enabled,

balance will automatically switch to percent mode display.

x# Downloads average piece weight “x” for parts counting mode. “x” must be in

grams. Command is ignored if parts counting mode is disabled. If parts counting

is enabled, balance will automatically switch to parts count display.

Esc L Prints listing of Setup and Print menu settings.

Esc R Resets Setup and Print menus to factory defaults.

CAUTION: This will reset RS232 configuration.

Esc S Save current settings.

Field: Weight Mode Stab CR LF

Length: 9 1 5 1 1 1

Same as ?

command

Displayed weight sent right justified

w/lead zero blanking.

Nine characters include:

decimal point (1)

weight (7 max))

polarity (1): blank if positive

“ - ” if negative

Field: Model # EPROM # CR LF

Length: 7 15 1 1

0 = OFF

1 = .5 d

2 = 1 d

3 = 3 d

Balance Model

"98101-XX Sr*XX.X"
14

OPERATION

Switch Functions

The pushbutton switches located on the front of the balance serve many functions.

please read the following information before pressing any of these switches.

Pressing any of these switches after the balance is turned on results in the following:

Sends weight data, statisti- Turns display OFF.

cal data, GLP data to computer/printer. In menus, allows returning to a previous

menu step.

Selects weighing units functions or options. In menus,

changes to next step or value.

Turns display ON and ReZeros/Tares the balance. In

menus, accepts chosen parameter.

When the balance is first turned on and it completes its checks, and is calibrated, it

can be used to weigh or tare materials without setting the menus.

There are many features and functions in the GT Balance, and if you do not address

all of the features, the balance has built-in default settings shown on each menu page.

Before using the balance, carefully review the Symbols Used for Operation of the

Balance shown on page 15, Navigating the Menus on page 16 and Operational Guide/

Index on page 17.

Please read the entire manual as there are many features which can be enabled. The

balance is shipped from the factory ready to operate with default settings as shown

in the menus.

The balance is a high precision instrument and will give you years of service if kept

clean and handled carefully. If you have any problems operating the instrument or

require additional information, please feel free to contact our Product Service

Department at (800) 526-0659.

OPERATION
15

Symbols 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 Switches:

 = NORMAL PRESS AND RELEASE

 = MULTIPLE PRESS

 = PRESS AND HOLD FOR DESIRED DISPLAY

 Display Area:

 DISPLAY AREA - AS A RESULT OF USER ACTION

 DISPLAY AREA - AUTO CHANGE OCCURS

DISPLAY AREA -SWITCHES BACK AND FORTH
16

OPERATION

Each menu contains selections (submenus) which can be set for specific operations.

The button is used to advance though the submenu selections.

The button enters or accepts the submenu selection and returns to the

beginning of the submenu selection.

The button is used to backup in the submenu if a change is desired.

The following sample illustrates the USER menu USER menu and submenu items

Navigating the Menus

There are four menus used in the balance:

CALIBRATION USER SETUP PRINT

To enter the menus, the button is pressed and held until MENU is displayed.

When released, CAL is displayed which is the Calibration menu.

When in the menus, repeated pressing of advances through the

menus. CALIBRATION USER SETUP PRINT END MENU

NOTE:

Each menu is constructed

in the form of a loop. Advancing from one submenu item to the next by

using the button

will eventually return to

the beginning of the

menu. .

<

<

<

<

<

<

>

<

<

<

<

>

<

RULES: Use button to advance. button to advance.

 Use button to enter or accept submenu. button to enter or accept submenu.

 Use button to backup. button to backup.

 After selections are made, always exit menus through END After selections are made, always exit menus through END MENU to

 store settings. store settings.

USER

RESET YES

NO

ON BEEP AL 0

STABILITY

<

<

>

2

3

1

<

<

<

.5d

OFF

1d

3d

OFF

ON AUTO-ZERO

OFF

END USER
17

OPERATION

 FUNCTION TO OPERATE SETUP

 (See pages) (See pages)

1. Turning the Balance ON 18 ----

2. Weighing (grams) 20 ----

3. Zero/Taring 20 ----

4. Auto Tare 20 ----

5. List 28 59, 68

6. Printing Data 27 to 32 61 to 68

7. Menu Lockout 34 ----

8. Calibration 36 to 39 ----

9. Percent Weighing 21 46, 67

10. Parts Counting 22 46, 51, 67

11. Check weighing 23 46, 52, 53, 67

12. Animal Weighing 24 46, 54

13. Fill Guide 25 46, 54, 67

14. High Point 26 46

15. Custom Units 50 49

16. Changing Units ---- 45

17. Statistics ---- 45

18. Net/Gross Weighing ---- 48

19. Legal for Trade ---- 45

20. GLP ---- 51, 63

21. Time ---- 56, 66

22. Date ---- 57, 67

23. Lockswitch ---- 58

24. Averaging Level Averaging Level ---- 40

25. Stability ---- 41

26. Auto Zero ---- 41

27. Beep Function ---- 42

28. Reset User ---- 40

29. Reset Setup ---- 44

30. Reset Print ---- 61

31. Communications ---- 61 to 63

Operational Guide/Index

The Operational Guide/Index lists the pages for all balance operations and options.

After settings are made, exit menus to save settings.
18

OPERATION

•

•

•

•

•

Turning 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.

NOTE: The display check countdown appears only in the first 60 seconds after

plugging it in and only if the balance is turned on and only when the balance has

been previously set with Type Approved/Legal for Trade set on.
19

OPERATION

Display Indications

The following table describes each of the display indicators.

DISPLAY INDICATORS

Moveable FineRangeTM (Models GT410D and GT4100D) (Models GT410D and GT4100D)

Models GT410D and GT4100D both contain 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 until either:

1. The load is reduced to below the capacity limit of the fine range.

2. tares the balance and recalls the fine range. Taring procedure can

be done repeatedly until capacity of the balance is reached.

Stabilization

Before initially 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 internal circuits of the balance are powered whenever

it is plugged into a power source.
20

OPERATION

Weighing

NOTE: The GT Series balances are shipped with grams only enabled and is labeled

in this manner. When the balance is to be used with other Type Approved/Legal

for Trade units of measure, the desired unit must be enabled and the appropriate

label from the card supplied must be attached to the balance

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

CAPACITY GUIDE

NOTE: The capacity guide (bars) indicates the percentage of the current weight to

the balance capacity. The example above illustrates a 4000 gram weight, (balance

full capacity 4100 grams).

AUTO TARE INDICATOR

Zero/Tare

When weighing material or objects that must be held in a container, taring 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.

NOTE: The container must weigh at least 100 times the readability of the balance (ie,

GT4K x 0.1 or 10 grams).

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.

Auto Tare

Auto Tare is enabled only when Auto Tare is selected under the Setup menu. Refer

to page 42. Auto Tare is used in an application where taring is done automatically

without touching any controls on the balance. This is indicated by a small arrow in the

display. When this option is set on, each time an object is first placed on the balance

platform, it is automatically tared and two short beeps will sound. When a second

object is placed on the platform along with the first object such as a container, only

the net weight is displayed. The container weight is not shown. After removal of all

material from the platform, the next object placed on the platform is auto tared. The

default setting is off.

NOTE: Auto Tare is disabled for LFT.
21

OPERATION

Percent Weighing

Percent Weighing is enabled only when

the Percent Function is selected under the

Setup menu. Refer to page 40. Percent

weighing permits you to place a reference

load on the balance, then view other loads

as a percentage of the reference. The load

you place on the platform as a reference

may be displayed as any percentage you

select from 5% to 100% (in 1% increments). One hundred percent does not

necessarily have to represent the reference load. Subsequent loads, displayed as a

percentage of the reference are limited only by the capacity of the balance. The

default setting is Reference 100%.

To perform percent weighing when in a weighing mode, use the following procedure:

1. .

2. Place an empty container on the pan (if one will be used).

3. . This is the current reference percentage.

NOTE: The reference percentage can be changed to any value from 5 to 100.

4. increments to .

NOTE: does not return to a lower number. Instead, it sends Set x%

 command through the RS232 Interface, where x = 5 to 100.

5. When the selected reference value appears on the display, place the

 reference load in the container (or directly on the platform if no container is

 used).

6. , display indicates the reference load as

 the percentage entered. The bar graph indicates the load relative to the

 capacity of the balance.

7. Remove the reference load from the balance and replace it with another

 load. The second load is displayed as a percentage of the reference.

8. to view alternate display in units.

9. To restart percent weighing at any time, .

 10. to exit to a weighing mode.

 EXAMPLE

A 10g reference load is set for 20%:

• A subsequent load of 100 g will be

displayed as 200%.

• A subsequent load of 200 g will be

displayed as 400%.
22

OPERATION

Parts Counting

Parts Counting is enabled only when the Parts Counting Function is selected in the

Setup menu. Refer to page 40. In the parts counting mode, the balance displays the

quantity of parts you place on the platform. Since the balance determines the quantity

based on the average weight of a single part, all parts must be reasonably uniform in

weight. The accuracy of parts counting results is determined by the error level entered

in PC Err of the Setup Options submenu. Refer to page 51. The default setting for

PC Err is off.

To perform parts counting when in a weighing mode, use the following procedure:

1. .

2. . The balance requires a sample of the parts

to use as a reference for counting. The default for the sample size is 5 parts,

but this can be changed to 10, 20, 30, 40, 50, or 100 parts by

(Larger samples yield more accurate results). Add the required number of

sample pieces to the platform.

3. (indicates 5 pieces).

4. If Add X is displayed, the sample is too small to provide results within the

selected error level (PC Error of the Setup Options submenu).

NOTE: X represents the number of additional parts needed to provide a sufficient

 sample.

5. Add the required number of parts, then again.

6. To count additional pieces, add them to the platform. The display indicates the

actual number of pieces based on their sample size. Tolerance will be within

whatever was selected under the Parts Counting Error Level.

NOTE: If the balance controls are not touched, the sample size is stored in memory.

 You can continue to use the balance to measure quantities as long as the

 samples to be measured are of the same weight.

7. to display the weight of the pieces on the pan.

8. again to display the number of pieces.

9. To restart parts counting, .

 10. , the balance returns to a weighing mode.
23

OPERATION

Check Weighing

Check Weighing is enabled only enabled only when the Check Weighing Function is selected in

the Setup menu. Refer to page 46. Refer to page 52, Check Weighing Options under

the Setup menu to set the Reference Type and Display Type options. In the check

weighing mode, a reference weight can be set into the balance either as a reference

weight on the pan or as a user entered number. The balance display shows either

under, accept or over as each sample is weighed.

If reference weight was selected under CW Options submenu:

1. With the balance in the weighing mode, .

NOTE: If reference number was selected, go to step 7.

2. Place a sample weight on the pan which is considered to be the under limit

for check weighing.

3. .

4. Place a sample weight on the pan which is considered to be the over weight

limit for check weighing.

5. . The display blanks until a stable reading is achieved, then it goes

to either the (Normal, None or Sign) display type previously selected in CW

Options submenu to indicate under, over or acceptacle limits of the objects

being weighed.

6. Check weighing can now be made by removing a sample and placing a new

sample on the pan.

 If reference number was selected under the CW Options submenu:

7. With the balance in the weighing mode, .

8. to return to weighing .

9. indicates under value with first digit flashing.

 10. until the first digit (under weight) is correctly displayed.

 11. . to accept the value.

 12. Repeat steps 10 and 11and set all digits to the desired value. When the last

digit is entered, display changes to an over value to be entered with the

first digit flashing .

NOTE: allows going back.
24

OPERATION

Animal Weighing

Animal Weighing is enabled only enabled only when Animal Weighing Function is selected under

the Setup menu. Refer to page 46. To set options, refer to page 55, Animal Weighing

Options under the Setup Options submenu.

With the balance in a weighing mode, proceed as follows:

1. (Animal Weighing Container).

2. Place the container on the platform.

NOTE: to return to weighing mode.

3. . The container weight is tared.

4. Place the subject in the container. The balance indicates a countdown to

. This cycle accommodates for movement.

The balance then displays the actual weight of the subject with flashing unit

indicator and returns to after approximately six seconds. Repeat steps 1 through 4 for another subject or to start

another weighing cycle.

NOTE: If Auto Print is enabled, the display returns to ready in approximately one

 second.

5. to return to weighing mode while display shows

.

NOTE: while the same subject is on the balance will cause Animal Weighing

to start over.

Check Weighing (Cont.) Check Weighing (Cont.)

13. Repeat steps 10 and 11 to set the over value. When the last digit is entered,

 the display indicates one of three display modes for check weighing.

14. Check weighing can now be performed by removing a sample and placing a

new sample on the platform.

15. allows other weighing units to be displayed if previously

 selected.
25

OPERATION

Fill Guide

Fill Guide is enabled only when Fill Guide

Function is selected under the Setup menu.

Refer to page 46. To set options, refer to

page 55, Fill Options under the Setup

Options submenu.

The FillGuideTM is a bar graph which appears in the upper right hand portion of the

display. When the load on the balance is at the balance's capacity, all of the segments

are on. When the load is at half capacity, only the first half of the segments are on.

During normal operation of the balance, the bar graph displays the relationship

between the load on the pan and the capacity of the balance. In the Fill Guide mode,

the bar graph can be set to a desired target value. The FillGuideTM feature can be used

in any one of the available weighing units.

The Fill Option under the Setup Options submenu provides two choices for a reference

weight (similar to check weighing). Either a mass can be placed on the pan and used

as a reference weight or a number can be entered to establish the weight value. Both

methods are used to establish a reference for a 100% bar graph reading. Target

parameter provides two choices, one is fill to the reference weight. The other option

sets the reference weight to a negative value and allows the operator to see the delta

between the actual fill weight and the target weight.

With the balance in a weighing mode, proceed as follows:

Reference Weight

With the balance in a weighing mode, and if reference weight was selected under Fill

Options submenu proceed as follows:

1. .

2. Place a sample weight on the pan which is the reference weight 

. Assumes 50 grams weight reference.

3. . The display indicates a 50 gram mass

(target = reference. For target = to zero, display shows 0.0000 as the actual

weight of the sample with the bar graph at 100%.

4. The Fill Guide feature can now used by placing samples on the pan. If the

sample is equal to the reference weight used to calibrate the fill mode, the

actual weight is displayed with a full bar graph. When target is selected, the

balance will show the normal weight of the object on the pan.

5. to exit the fill option mode.

6. , the balance is now in a weighing mode.

FILLGUIDETM BAR GRAPH

FILLGUIDETM INDICATOR
26

OPERATION

Fill Guide (Cont.) Fill Guide (Cont.)

Reference Number

If reference number was selected under the Fill Option submenu with the balance in

a weighing mode, proceed as follows:

1. .

2. . Set the flashing digit to the desired weight

 value.

3. until the first digit is correctly displayed.

4. to accept the digit.

5. Repeat steps 3 and 4 until all digits are set. When the last digit is entered ,

the balance is automatically in the fill mode.

6. The fill mode can now be used by placing samples on the pan. If the sample

weight equals the reference weight, the bar graph indicates 100%, the weight

is displayed.

7. to exit the fill option mode.

8. , the balance is now in a weighing mode.

High Point High Point

High Point is enabled only when High Point Function is selected under the Setup

menu. Refer to page 46. High point is a feature which permits a number of samples

to be weighed with the balance storing the lowest sample weight and the highest

sample weight. The samples which are in between the low and high points are

disregarded and not displayed.

NOTE: When using this function, the balance does not respond to weights below 100

digits.

With the balance in a weighing mode, proceed as follows:

1. . , LIMIT is dis-

 played, indicating the function is on.

2. Place the first sample on the balance pan. When the balance has stabilized,

 the weight is displayed. Remove the weight.

3. Place a second sample on the pan. After the balance stabilizes, the second

 sample weight is displayed if it is greater than the first sample. This procedure

 can be continued with a number of samples. The highest weight sample is

 always displayed.
27

OPERATION

NOT DISPLAYED

5g 4g 2g

20g

40g

 ORDER SAMPLES TAKEN IN

5. To use the High Point function again, repeat steps 1 through 4.

6. to exit High Point and return to a weighing

 mode.

High Point (Cont.) High Point (Cont.)

4. To view the lowest and highest sample weight. The display LIMIT

 flashes, the lowest sample weight is displayed followed by two short beeps,

the display then indicates the highest sample weight for a few seconds then

automatically changes back to the normal weighing mode.

6/22/95 1:00:30 PM

Printing Data

Printing data to an external computer or printer requires that the communications

parameters in the Print menu be set first. Refer to page 60 Print menu. A wide variety

of printing options are available, refer to page 64, Print Options under the Print menu

and set the desired options before proceeding. To print data, .

This section defines the various printing setups with printing samples.

Time and Date

When time and date are entered in the

balance through the Setup menu and with

both Time and Date options set to ON

under the Print Options submenu, each

printout starts with the time and date on

the first line.
28

OPERATION

 Diff = On

Total = Off

Auto Tare = Off

GLP

 Time/Date On

 Bal Id = On

 User Id = On

 Project # = On

 Cal = On

Time = US 12:00:00 PM

Date = US 4/1/94

Lock Switch is Off

Print Menu

 RS-232 = 2400: N: 7: 2

 Print Options

 Auto Print = Off

 Interval = 2

 Non - PL = 0.000

 Non - PH = 50.000

 Stable Print = Off

 Nu = Off

 Time = On

 Date = On

 Print Ref = On

 Print Ref = On

Printing Data (Cont.) Printing Data (Cont.)

List

List is a convienent method of examining

which parameters are set up in the balance. The parameters do not show up on

the display but print out when selected.

Both the Setup and Print menus have a

List function.

When LIST is displayed in either the Setup

or Print Menu, causes the parameters of the User, Setup and Print

menus to be printed on an external printer

or computer screen.

The sample shown, indicates the status in

three menus.

GT MODEL 98101-18 Sr 1.0

User Menu

AL = 3, Stb = 1d

AZT = Off, Beep = Off

Setup Menu

LFT is Off

Enabled Modes:

g, dwt,

oz, ozt,

tael, momme,

lb, custom

Tael = Hong Kong

C. Units:

1.000000 EXx1

Units = custom

Functions = None

Statistics On

 Std Dev = Sample

 Mean = On

 Sum = On

 Max = On

 Min = On
29

OPERATION

Printing Data (Cont.) Printing Data (Cont.)

Span Calibration Printout Span Calibration Printout

With GLP on, when performing a Span

calibration, a printout is automatically

made after the calibration mass is placed

on the platform and is pressed.

 - - - - - SPAN CAL - - - - - -

4/01/95 12:00:00 PM

Bal Id 1234

Cal: 4000.00g

Old: 4000.00g

Dif: 0.00g

Wt. Ref......................................

ID 2056853

PR 100012

Name........................................

- - - - - END - - - - -

Linearity Calibration Printout Linearity Calibration Printout

When performing a Linearity calibration

with GLP on, a printout is automatically

made after the calibration mass is placed

on the platform and is pressed.

 - - - - - LIN CAL - - - - - -

4/01/95 12:00:00 PM

Bal Id 1234

Cal: 4000.00g

Old: 3999.94g

Dif: 0.06g

Wt. Ref......................................

ID 2056853

PR 100012

Name........................................

- - - - - END - - - - -

 - - - - - CAL TEST - - - - - -

4/01/95 12:00:00 PM

Bal Id 1234

Cal: 4000.00g

Act: 4000.04g

Dif: 0.04g

Wt. Ref......................................

ID 2056853

PR 100012

Name........................................

- - - - - END - - - - -

Calibration Test Printout Calibration Test Printout

When performing a Calibration Test with

GLP on, a printout is available. When the

display indicates the mass value to be

placed on the platform, the balance the

automatically displays the calibration

weight required.
30

OPERATION

Statistics Printout

When statistics is enabled, a printout can be made with any of the major balance

functions such as; Percent, Parts Counting, Check Weighing, Animal Weighing and

FillGuideTM. Under the Setup Options menu, Statistics has parameters such as

Enable, Standard Deviation, Mean, Sum, High, Low and Difference which can be

turned on or off. Statistics can be printed any time the balance is operational and

statistics is enabled (turned on).

For example, to weigh ten samples and obtain a printout, proceed as follows:

Sampling

1. .

2. Place the first sample on the platform, wait for the stability indicator S on the

 display to show.

3. 

 appears and the printer outputs

the first sample weight.

4. Remove the first sample.

5. Place the second sample on the

 platform, wait for the stability

indi- cator S on the display to show.

6.

 appears and the printer outputs

 the second sample weight.

7. Remove the second sample.

NOTE: The weight of each sample is

 shown on the display and printed.

 Maximum sample size = 256.

8. Repeat procedure for as many

 samples as required.

9. 

 to end the sampling procedure.

 Printout completes the data.

See sample at right.

Printing Data (Cont.) Printing Data (Cont.)

 - - - - - START - - - - -

4/01/95 12:00:00 PM

 1 49.54 g

 2 49.54 g

 3 49.56 g

 4 49.57 g

 5 50.03 g

 6 50.54 g

 7 50.04 g

 8 50.04 g

 9 50.03 g

10 50.04 g

- - - - - - - - - - - - - - - - - - - - -- -

SD Pop. 0.314

Mean 49.893

Sum 498.93

Maximum 50.54

Diff 1.00

Finish 12:05:00 PM

Bal Id 1234

ID 2056853

PR 100012

Name......................................

 - - - - - - END - - - - - -
31

OPERATION

Printing Data (Cont.) Printing Data (Cont.)

Percent Weighing

Statistical printouts of Percent Weighing

are similar to sampling statistics. Loads

on the balance platform may be displayed

as a percentage from 5% to 100% in 1%

increments. To obtain a printout in this

mode, the balance must be set up in

Percent Weighing. Refer to basic Sampling procedure for operation. The sample

illustration shown at the right had the

balance reference set to 100% using a

weight of 17.398 grams.

Parts Counting

When the balance is in a Parts Counting mode, each time a batch of items

are counted, they can be recorded

statistically by pressing as

described in the Sampling procedure.

The example shown on the left used

a sample weighing 0.496 gram each.

 - - - - - START - - - - -

4/01/95 12:00:00 PM

 1 5 Pcs

 2 5 Pcs

 3 15 Pcs

 4 23 Pcs

 5 36 Pcs

 6 42 Pcs

 7 52 Pcs

 8 50 Pcs

 9 41 Pcs

10 50 Pcs

- - - - - - - - - - - - - - - - - - - - -- -

SD Pop. 17.530

Mean 31.900

Sum 319.00

Maximum 52.00

Diff 5.00

Finish 12:05:00 PM

PC Ref 0.496 g

Bal Id 1234

ID 2056853

PR 100012

Name....................................

- - - - - - - - END - - - - - -

 - - - - - START - - - - -

4/01/95 12:00:00 PM

 1 99.9%

 2 100.1%

 3 100.0%

 4 55.9%

 5 123.2%

 6 155.9%

 7 102.8%

 8 102.9%

 9 105.9%

10 105.7%

- - - - - - - - - - - - - - - - - - - - -- -

SD Pop. 23.276

Mean 105.230

Sum 1052.30

Maximum 155.90

Diff 100.00

Finish 12:05:00 PM

Bal Id 1234

ID 2056853

PR 100012

Name......................................

 - - - - - - END - - - - - -
32

OPERATION

Printing Data (Cont.) Printing Data (Cont.)

Check Weighing

When the balance is in a Check Weighing

mode, each sample can be checked either to show or print an under, accept or

over weight on the printout. Use the

procedure described in Sampling to obtain data by pressing each time a

sample is weighed. A numeric entry of

50.00 grams was used for this sample

printout.

FillGuideTM

When the balance is in a FillGuideTM mode,

each sample can be checked on the printout. By accessing the Custom Units submenu, Density settings can be in Milliliter,

Liters, Fluid Ounces or Quarts. Use the

procedure described in Sampling to obtain

data by pressing each time a

sample is weighed. A standard mass of

2,000 grams was used for this sample

printout and a sample taken each minute.

 - - - - - START - - - - -

4/01/9512:00:00 pm

1 50.78 g ACCEPT

2 52.74 g ACCEPT

3 55.25 g ACCEPT

4 57.63 g OVER

5 52.79 g ACCEPT

6 51.78 g ACCEPT

7 50.79 g ACCEPT

8 47.79 g UNDER

9 47.79 g UNDER

10 50.30 g ACCEPT

- - - - - - - - - - - - - - - - - - - - - - - -

SD Pop. 2.682

Mean 51.964

Sum 519.64

Maximum 57.63

Diff 9.84

Finish 12:05:00 PM

Min Ref 50.00 g

Max Ref 53.00 g

Bal Id 1234

ID 2056853

PR 100012

Name......................................

 - - - - - - END - - - - - -

4/01/95 12:00:00 PM

1999.9 g

Fill Ref 1999.98 g

Fill Dif - 0.01 g

4/01/94 12:01:00 PM

2023.87 g

Fill Ref 1999.98 g

Fill Dif- 23.89 g

4/01/94 12:02:00 PM

2050.28 g

Fill Ref 1999.98 g

Fill Dif - 50.30 g
33

MENUS

Each submenu of the GT Balance contains numerous selections which can be set for

specific operations. To customize the operation of the balance for specific measurements, functions and printing, it is necessary to make selections in each menu. The

following illustration identifies the major items in each menu and the factory default

settings are shown in bold type with the exception of the Setup Options and Print

options which are shown in their respective menus. Shaded areas only appear in the

menu if the appropriate function or weighing unit is selected in the Setup menu.

SETUP

RESET

YES/NO

LFT

ON/OFF

SELECT UNITS

g, dwt, ct, oz, oz t,

UNIT 1 (grain), t

UNIT 2 (mommes),

lb, UNIT 3 (custom)

FUNCTIONS

Percent

Parts Counting

Check Weighing

Animal Weighing

FillGuideTM

High Point

None

SETUP OPTIONS

Statistics

Enable

Standard Dev.

Mean

Sum

High

Low

Difference

End, Statistics

Net

Auto Tare

Custom Units

Factor

Density

End

GLP

Time

BAL ID

ID #

Proj. #

Cal

Name

End, GLP1

PRINT

RESET

Yes/No

COMMUNICATION

Baud

300, 1200,

2400, 4800,

9600

Data Bits

7 or 8

Parity Bit

Odd, Even,

None, 1, 0

Stop Bits

1 or 2

End, Comm.

GLP

ID #

Project #

End

PRINT OPTIONS

Auto Print

Initialize Auto Pt.

Stable Data

Numeric Data

Time

Date

Reference

Difference

End, Print Opts.

LIST

END, PRINT

CAL

CAL SPAN

CAL LINEARITY

CAL USER

Enter #

CAL TEST

END, CAL

USER

RESET

YES/NO

AL

0, 1, 2, 3

STABILITY

.5d, 1d, 2d, 5d

AUTO ZERO

OFF, .5d, 1d,

3d

BEEP

ON/OFF

END, USER

SETUP OPTIONS

(Cont.)

PC Error

CW Options

Reference Type

Displays Type

End, CW Opts.

AW Options

Fill Option

Reference Type

Target Direction

End, Fill Opts.

End

TIME

Set

Enter #

Type

US, Euro

End, Time

DATE

Set

Enter #

Type

US, Euro

End, Date

LOCKSWITCH

Cal

YES/NO

User

YES/NO

Setup

YES/NO

Print

YES/NO

End, Lockswitch

LIST

END, SETUP

 MENUS
34

 MENUS

MENU LOCK-OUT PROTECTION

Access to the Calibration, User, Setup

and Print menus, can be disabled using

the Lockswitch located on the PC board

inside the balance. The Lockswitch locks

out menus selected in the Lockswitch

menu. The default setting for the Lockswitch is OFF.

1. Turn the display off and unplug the

power cord.

2. Remove the platform and platform

support.

3. Remove the two (2) cover screws

and tilt the cover towards the right

side of the balance.

4. The menu Lockswitch is located on

the front of the PC board. The OFF

position is to the left facing the front

of the balance.

5. Select the desired position on the

Lockswitch and reassemble the balance.

LOCKSWITCH

LOCATED INSIDE OF

BALANCE

WARNING

• To avoid shock hazards, always be

certain that the power cord is disconnected BEFORE removing the balance cover.

• Even though the balance may have

been switched OFF, high voltage is

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 other

type of power cord other than the one

furnished.

DO NOT create a safety hazard by

defeating the grounding feature.
35

 MENUS

TYPE APPROVED BALANCE SEALING

Precision Advanced Electronic Balances with an "E" suffix, may be sealed for type

approved applications. Type Approved balances include a lead seal with wire and

security screw as shown in the figures below. Non Draft Shield equipped models have

two fastening points (lances) and Draft Shield equipped balances have three

fastening points for sealing wire.

Type approved balances are Class II devices, consult local Weights and Measures

officials to determine sealing method requirements.

After the balance has been set up properly and the menus are locked out (see section

titled Type Approved/LFT), proceed as follows to seal the balance: Turn OFF and

unplug the balance. Remove Platform and Platform Support.

1. Pass the wire through the Security Screw and the lances on the Plate as shown

in the illustration. NOTE: On balances with a draft shield, both sides of the wire

from the screw must pass through the first lance, otherwise the wire may interfere

with balance operation by touching the bottom of the platform.

2. Crimp the lead seal tightly.

3. Reinstall items removed.

1. Apply Seal, see illustration for location.

2. Seal is provided by Weights and Measures officials or authorized Ohaus

representatives.

3. Reinstall items removed.

LEAD SEAL LEAD SEAL

SEALING FOR BALANCES

WITH DRAFT SHIELDS

SEALING FOR BALANCES

WITHOUT DRAFT SHIELDS

SEALING STICKER

 LOCATION

ALTERNATE

LABEL (LFT)

(See page 39)

SEALING STICKER

 LOCATION

• LEAD SEAL METHOD

OR

• SEALING STICKER

METHOD
36

 MENUS

CALIBRATION MASSES

LINEARITY SPAN ONLY

MODEL MASSES MASSES

GT210 100g, 200g 200g

GT400 200g, 400g 400g

GT410 200g, 400g 400g

GT410D 200g, 400g 400g

GT2100 1kg, 2kg 2kg

GT4000 2kg, 4kg 4kg

GT4100 2kg, 4kg 4kg

GT4100D 2kg, 4kg 4kg

GT8000 4kg, 8kg 8kg

Masses must meet or exceed ASTM

Class 1 Tolerance. Calibration masses

are available as accessories.

CALIBRATION MENU

Precision Advanced balances features CalTestTM which offers a choice of three

calibration methods: Cal Span, Cal Linearity, and Cal User. Cal Span Cal Span calibration

ensures that the balance reads correctly within specifications using two weight

values: zero and a weight value at either 25%, 50%, 75% of or at the balance’s full

capacity. Cal Linearity calibration minimizes deviation between actual and displayed

weights within the balance’s weighing range. Three weight values are used: zero, a

weight value at midpoint of the balances weighing range, and a weight value at or near

the balance’s specified capacity. Cal User Cal User is a method where the balance can be

calibrated using a mass of known value by entering that value into the balance. Cal

Test allows the stored calibration data to be tested against the current mass being

used for the test. The following figure illustrates the sequence in which submenus

appear on the Calibration menu. Item shown bolded is a default setting.

Calibration Menu Protection

NOTES:

1. Calibration may be locked out to prevent unauthorized personnel from changing calibration. If calibration has been

locked out, you can only access Cal Test.

2. To lock out calibration menu, after

calibration, refer to the section titled Menu

Lock-Out Protection.

Calibration Masses

Before beginning calibration, make sure

masses are available. If you begin calibration and realize calibration masses are

not available, exit the menu. The balance

will retain previously stored calibration

data. Calibration should be performed as

necessary to ensure accurate weighing.

Masses required to perform the procedures are listed in the adjacent table.

CALIBRATION MENU

CAL SPAN

0, 25%, 50%, 75% or Span Weight (100%).

CAL LINEARITY

0, Linearity & Span Weight.

CAL USER

Enter #

CAL TEST

0, Span Weight.

END, Calibration

NOTE: Multiple Span values and

Cal User are disabled for Type

Approved/LFT balances.

C

A

L
37

 MENUS

Span Calibration

1. .

2. .

3. , = no mass should be on the platform.

4. = mass which

must be placed on the platform.

5. allows the selection of either 25%, 50%, 75%, or 100% of full

span to be used to calibrate the balance. Example shows value of 50% for a

4 kg balance.

6. Place required mass on the platform , .

. When mass is displayed with current unit indicator,

and the stability indicator (S) is ON, the balance is recalibrated.

7. Remove the mass from the platform . Span

calibration is complete. The balance is now in a weighing mode.

NOTE: Do not disturb the balance

when -C- is displayed. when -C- is displayed.

Linearity Calibration

1. .

2. .

3. .

4. , = no mass should be on the platform.

5. = mass which

must be placed on the platform.

6. Place the required mass on the platform, 

= next mass to be placed on the platform.

7. Place the required mass on the platform, .

. When mass is displayed with current unit indicator

and the stability indicator (S) is ON, the balance is recalibrated.

8. Remove the mass from the platform . Linearity

calibration is complete. The balance is now in a weighing mode.

NOTE: Do not disturb the balance

when -C- is displayed. when -C- is displayed.
38

 MENUS

User Calibration

User calibration is used when it is desired to calibrate the balance using a mass of

known value. To use this calibration feature, proceed as follows:

1. .

2. .

3. .

4. . Last calibration mass value is displayed

with the first digit flashing.

5. to change flashing digit.

6. to accept and proceed to the next digit. to backup.

7. Set the number to match the value of the selected calibration mass. The

number entered must be at least 25% of the full span value.

8. After the last digit has been accepted, .

9. .

 10. Place calibration mass on the platform.

 11. . . The balance

 is now calibrated, remove the calibration mass. The balance is now in a

 weighing mode.

Cal Test Cal Test

Cal Test offers a choice of the span calibration value (1/4, 1/2, 3/4 or full). To ensure

reproducibility, this feature allows a check of a known calibration mass against last

stored calibration information.

1. .

2. .

3.

.

4. , = no mass should be on the platform.

5. = mass which

must be placed on the platform.
39

 MENUS

Cal Test (Cont.) Cal Test (Cont.)

6. switch allows the selection of either 25%, 50%, 75%, or 100%

of full span to be used to calibrate the balance.

7. Place the required mass on the platform .

The balance weighs the test mass based on current

calibration data, then displays the difference between the measured value and

requested value. The example shows a normal display if the test mass equals

the mass value stored in memory.

8. After a short period of time, the balance returns to the weighing mode.

USER MENU

The User menu is used to adapt the balance to environmental conditions. It contains

submenus which enable you to turn features on or off, and program balance

parameters. Reset changes all submenus to original factory default settings. Reset

does not appear if menu has been locked out. AL specifies the averaging level. STB

specifies the desired stability range. Auto Zero sets the automatic zero threshold.

Beep, when set on, provides audible tones to signify various balance conditions. End

User is used to exit the Setup menu and store the selections. The following figure

illustrates the sequence in which submenus appear on the User menu. Items shown

in bold type are the default settings.

USER MENU

RESET

YES/NO

AL

0, 1, 2, 3

STABILITY

.5d, 1d, 2d, 5d

AUTO ZERO

OFF, .5d, 1d,

3d

BEEP

ON/OFF

END, User

User Menu Protection

The User menu may be locked out to prevent unauthorized personnel from changing

the settings. If -SAFE- is displayed, the User menu has been locked out. Settings

may be viewed but not changed. To lock out the User menu, refer to the section titled

Menu Lock-Out Protection.
40

 MENUS

Reset

This submenu enables you to reset all User menu selections to the factory default

settings: Averaging Level 1, Stability Range .5d, Auto-Zero Tracking .5d and Beep

OFF. Reset does not appear if the menu has been locked out.

1. .

2. .

3. .

4. .

5. to select or .

6. . If is selected, the

 balance signals a two short beeps. Reset values are stored only if exited

through .

Averaging Level Averaging Level

Averaging level compensates for vibration or excessive air currents. Factory default

setting is shown in bold type.

AL 0 reduced stability, fastest stabilization time

AL 1 normal stability, normal stabilization time

AL 2 more stability, slow stabilization time.

AL 3 maximum stability, slowest stabilization time.

NOTE: Averaging level does not affect balance accuracy, but it does affect

 stabilization time.

To view or change the averaging level:

1. Access the Averaging Level submenu.

2. .

3. to select through .

4. .
41

 MENUS

Stability Range

The stability range specifies the weighing results must be within a preset tolerance limit

for a certain time to turn the stability indicator ON. When a displayed weight changes

beyond the allowable range, the stability indicator turns OFF, indicating an unstable

condition. Factory default setting is shown in bold type.

Stb .5 d Smallest range: stability indicator is ON only

when displayed weight is within .5 divisions. when displayed weight is within .5 divisions.

Stb 1 d Reduced range.

Stb 2 d Normal range.

Stb 5 d Largest range: stability indicator is ON even though

displayed weight changes slightly.

When the RS232 interface is configured to print stable data only, the stability range also

governs data output. Displayed data will only be output if it is within the selected stability

range.

To view or change the stability range:

1. Access the Stability Range submenu.

2. .

3. to select through .

4. .

Auto-Zero

Auto-Zero minimizes the effects of temperature changes and shift on the zero reading.

The balance maintains the zero display until the threshold is exceeded. Factory default

setting is shown in bold type.

OFF Turns Auto-Zero OFF.

.5 d Sets threshold to .5 divisions. Sets threshold to .5 divisions.

1 d Sets threshold to 1 division.

3 d Sets threshold to 3 divisions.

To view or change the auto-zero setting:

1. Access the Auto-Zero submenu.

2. .

3. to select through .

4. .
42

 MENUS

GT BEEPS

Power-On Single long beep (Plug in, not front panel On) Single long beep *

Key Press Single short beep

Auto-Tare occurrence Double short beep *

FillGuideTM 100% (first time after no load) Triple short beep

Check Weigh Accept First time after no load) Triple short beep

High Point - new high or low value detected Double short beep

End of Animal Weigh cycle Double short beep

Reset in Menu Double short beep *

* Indicates that the beep cannot be disabled.

Exiting User Menu

To exit the User menu and store settings, proceed as follows:

1. Access End Usr submenu.

2. .

3. .

4. .

Beep Function

A beep (sound) feature is a tone or series of tones emitted to annunciate various

balance conditions. The table below defines when the beeps are sounded if turned

ON. The default setting for the Beep menu is OFF. To turn the sound feature ON,

proceed as follows:

1. Access the Beep submenu.

2. .

3. to select or .

4. .
43

 MENUS

SETUP MENU

The Setup menu is used to customize the operation of the balance for your specific

requirements. It contains submenus which enable you to turn features on or off, and

program balance parameters. Reset changes all submenus to original factory default

settings. Reset does not appear if menu has been locked out. LFT sets the balance

for type approved operation. The following figure illustrates the sequence in which

submenus appear on the Setup menu. Areas shaded appear only appear in the menu

if the appropriate function or weighing unit is selected. Items shown in bold type are

the default settings.

SETUP OPTIONS (Cont.)

Fill Options

Ref.

Weight #

Target

To ref, to zero

End, Fill Options

End, Setup Options

TIME

Set

Enter #

Type

US, Euro

End, Time

DATE

Set

Enter #

Type

US, Euro

End, Date

LOCKSWITCH

Cal

YES/NO

User

YES/NO

Setup

YES/NO

Print

YES/NO

End, Locksw

LIST

END, Setup

SETUP OPTIONS (Cont.)

Custom Units, Unit 3

Factor

Mantissa

Enter #

Exponent

-3, -2, -1, 0, 1, 2, 3

LSD

.5, 1, 2, 5, 10, 100

Density

none, l, ml, fl oz, qt

End

GLP

Time /Date

ON/OFF

Bal ID

ON/OFF

ID #

ON/OFF

Proj. #

ON/OFF

Cal

ON/OFF

Name

ON/OFF

End, GLP1

Parts Counting Error %

.1,. 25, .5, 1, 2.5, 5, OFF

Check Weighing Opts.

Reference.

Ref. Weight #

Display, Ref. #

norm, none, sign

End, CW Options

Animal Weighing Options

AW0, AW1, AW2, AW3

 SETUP MENU

RESET

YES/NO

LFT

ON/OFF

SELECTION, UNITS

g, dwt, ct, oz, oz t,

UNIT 1 (grain), t,

UNIT 2 (mommes), lb,

UNIT 3 (custom)

FUNCTIONS

Percent

Parts Counting

Check Weighing

Animal Weighing

FillGuideTM

High Point

None

SETUP OPTIONS

Statistics

Enable

ON/OFF

Standard Dev.

pop, sample, OFF

Mean

ON/OFF

Sum

ON/OFF

High

ON/OFF

Low

ON/OFF

Difference

ON/OFF

End, Statistics

Net

ON/OFF

Auto Tare (Net/Gross)

ON/OFF
44

 MENUS

Setup Menu Protection

The Setup menu may be locked out to

prevent unauthorized personnel from

changing the settings. If -SAFE- is

displayed, the Setup menu has been locked

out. Settings may be viewed but not

changed. To lock out the Setup menu,

refer to the section titled Menu Lock-Out

Protection on page 34.

Reset

This submenu enables you to reset all

Setup menu selections to the factory

default settings shown in the table. Reset

does not appear if the menu has been

locked out.

NOTES:

1. Default settings of the Lockswitch menu

 only appear if the hardware Lock-out

 switch is set to the locked position.

2. Function related options shown in itailics

 in the table only appear if that function

 is enabled.

 SETUP MENU

FACTORY DEFAULTS

Unit Selection grams

Functions None

Statistics All-Off

Net Off

Auto Tare Off

Conversion Factor

Mantissa 1.000000

Exponent 0

LSD 1

Density Off

GLP Off

Animal Weighing* AW1

PC Error Level* OFF

Check Weighing*

Reference Ref Wt.

Display Normal

Fill Options*

Reference Ref Wt.

Target To Ref

Time U.S.

Date U.S.

Lockswitch Menu

Cal Yes

User No

Setup Yes

Print No

1. .

2. .

3. .

4. .

5. or .

6. . If is selected, the

balance signals a double short beep.
45

 MENUS

1. Access the submenu.

2. .

3. or .

4. .

Type Approved/LFT

LFT can be set to ON or OFF. Selecting ON automatically sets the parameters shown

in the table to conform to type approved requirements. For sealing method, refer to

Type Approved Sealing section. Default setting are shown as follows:

Auto Zero .5 d

Lockswitch Menu Setup & Calibration

Stable Data Only Locked ON

Auto-Tare Locked OFF

Net/Gross Enabled

IMPORTANT NOTICE

Unit Selection

The Unit Selection (SEL) submenu permits the selection of weighing units for use

during operation. The balance can display

weights in every unit of measure listed in

table. The default setting is shown in bold

type.

NOTE:

If Taels is enabled, see next page before

exiting the menu.

 Weighing Units

g Grams

dwt Pennyweight

ct Carats

oz Ounces

ozt Troy ounces

UNIT1 Grains

t Taels (see note)

UNIT2 Mommes

lb Pounds

UNIT3 Custom

United States Legal for Trade

All balances which contain the suffix "E" after the model number are

Type Approved/Legal for Trade. In accordance with the Marking

Requirements of Handbook 44, these products are designed for

use in the Net Weigh mode. Users who do not enable the Net Weigh

mode must attach the "RE-ZERO" label below switch marked "ON"

and ">O/T<". Refer to the Setup Menu, Net Weigh mode in this

Instruction Manual for directions on enabling Net Weigh mode.

For label location, see page 29.
46

 MENUS

Unit Selection (Cont.) Unit Selection (Cont.)

Functions

The Functions submenu permits the selection of only one function. These functions

are: Percent, Parts Counting. Check Weighing, Animal Weighing, FillGuideTM, High

Point or None. The default setting is none. Only one function at a time can be

selected for balance operation. Selection of a function, other than None or Percent,

requires additional selections to that function be reviewed in the section titled Setup

Options.

1. Access the submenu.

2. .

3. , ,

, , ,

.

4. .

Taels

If taels are enabled, choose one of three different taels: Hong Kong, Singapore, or

Taiwan.

1. .

2. (Hong Kong),

(Singapore), or (Taiwan).

3. .

To view or change the various weighing units:

1. Access the submenu.

2. .

3. or .

4. for next unit status.

5. Repeat steps 2 through 4 for each unit.

6. .
47

 MENUS

Statistics

Statistics provides printed display data of: Standard Deviation either population or

sample, Mean, Sum, High, Low and Difference readings. Each can be individually set

ON or OFF.

1. Access menu.

2. .

3. . Enable allows the statistics feature to be

 turned off without losing the individual settings programmed into memory.

4. .

5. or .

6. .

7. .

8. .

9. , ,

 .

 10. .

 11. .

 12. .

 13. or .

 14. .

 15. Continue the same procedure to set Sum, High, Low and Difference para-

 meters and finish by selecting .
48

 MENUS

Net

Weight shown on the display can be referred to as a zero value (gross value) or tare

value (net value). When enabled the display value also has GROSS/NET Indicator

turned ON, this feature will allow you to obtain a zero value by a long press on .

A short press is a tare.

Net Weight Net Weight - the weight of a material or sample after deducting the weight of its

packaging or container with which it had previously been weighed.

Gross Weight Gross Weight - the weight of object or sample (Net Weight) including container or

packaging.

NOTE: When in a weighing mode, switches between Gross weight and

Net weight.

The Net function can be set either ON or OFF.

1. Access the menu under the Setup Options menu.

2. .

3. or .

4. .

Auto Tare

NOTE: Auto Tare is disabled for LFT.

To set Auto Tare feature ON or OFF, proceed as follows:

1. Remove any material from the platform.

2. Access the Auto Tare submenu under Setup Options

menu.

3. .

4. or .

5. .
49

 MENUS

Custom Unit or Volume Selection

Custom Unit is enabled when Unit 3 under Unit Selection is selected. This feature can

be used to create your own custom weighing unit. It permits entering a conversion

factor which the balance will use to convert grams to the desired unit of measure.

Conversion Weight Weight

Factor x in = in

grams custom unit

Conversion factors are expressed in scientific notation and entered into the balance

in three parts:

• a number between 0.1 and 1.999999

called the mantissa

• a power of 10 called the exponent

• a least significant digit (LSD)

SCIENTIFIC NOTATION

Number

Between

Conv. 0.1 and Power ManFactor 1.999999 of 10 tissa Exp.

123.4 = .1234 x 1000 = .1234 x 103

12.34 = .1234 x 100 = .1234 x 102

1.234 = .1234 x 10 = .1234 x 101

.1234 = .1234 x 1 = .1234 x 100

.01234 = .1234 x .1 = .1234 x 10-1

.001234 = .1234 x .01 = .1234 x 10-2

.000123 = .123 x .001 = .123 x 10-3

EXPONENTS

E-3 Moves decimal point 3

places to the left.

E-2 Moves decimal point 2

places to the left.

E-1 Moves decimal point 1

place to the left.

E0 Leaves decimal point in

normal position.

E1 Moves decimal point 1

place to the right.

E2 Moves decimal point 2

places to the right.

E3 Moves decimal point 3

places to the right.

1. Access the submenu under the Setup Options menu.

2. .

3. .

 The mantissa of the current conver

 sion is displayed. The mantissa of

the current conversion factor is dis

played. This is a number between

0.1 and 1.999999 with the first digit

 flashing. For conversion factors

 outside of this range, the exponent

 will be used to move the decimal

 point.

4. changes first digit.

5. .

next digit flashes.

6. Repeat steps 4 and 5, and set

 value of all digits.

7. to backup for errors.
50

 MENUS

Custom Unit or Volume Selection (Cont.) Custom Unit or Volume Selection (Cont.)

8. After the last digit is entered, the display indicates the current exponent

 preceded by the letter . There are 7 exponent values

 which you can choose from (see table).

9. to change the exponent.

 10. . When released, the display shows the current least significant

 digit. The least significant digit is the digit in the last decimal place on the

 display. The selection you make causes the balance to count by 1’s, 2’s or 5’s

 in this position. There are 6 LSD settings you can choose from (see table).

 11. to change the LSD.

 12. .

 13. .

 Density permits the selection of the

 density of a liquid by measuring the

 volume by weight. If the Factor is

 the density of a liquid, the approp-

 riate unit of volume can be selected

 for printing.

 14. .

 15. , ,

 , . Selecting NONE disables

the volumetric units.

 16. .

NOTE: To use this function the printer must be on and all communication

parameters must be set first.

Operating Procedure

1. Place a container on the platform, to tare the container .

2. Fill the container.

3. , printer will now print out quantity of selected unit of measurement.

LSD’s

LSD .5* Adds one decimal place

display counts by 5’s.

LSD 1 Display counts by 1’s.

LSD 2 Display counts by 2’s.

LSD 5 Display counts by 5’s.

LSD 10 Display counts by 10’s.

LSD 100 Display counts by 100’s.

* Sensitivity to vibration is increased

with this LSD setting.
51

 MENUS

Good Laboratory Practices

Good Laboratory Practices (GLP) submenu allows the selection of Time, Balance

Identification Number, Identification Number, Project Number, Calibration and Name

data to be printed. The purpose of this submenu is to permit the printing of the above

selected items. These items are not displayed. The default setting is off.

When an external printer is used, and all items are set ON and the balance is

calibrated, the printer will print out calibration data for audit trail purposes and will

indicate date, and time. (It should be noted that the ID number and Project number

must be entered in the Print/GLP submenu before printed data is available). Since all

of the settings for the GLP submenu are done in a similiar manner, only one example

is shown.

1. Access the submenu under SETUP Options menu.

2. .

3. .

4. or .

5. .

6. Repeat steps above for Balance ID#, ID#, Project#, Calibration and Name.

Parts Counting Error

Parts counting Error is enabled only when the Parts Counting Function is selected.

The parts counting error level is the level of accuracy you consider acceptable for

parts counting results. The adjacent table lists error levels that you can choose from.

The default setting is shown in bold type.

EXAMPLE: With 5 Pct selected, 100 parts on the platform may yield a displayed count

from 95 to 105 parts.

To view, change or disable the PC Error Level:

1. Access the submenu under the Setup Option submenu.
52

 MENUS

Parts Counting Error (Cont.) Parts Counting Error (Cont.)

2. indicates percentage of acceptable error.

 Settings are shown in table.

3. to to change the

 percentage error limits,

4. when the desired setting is reached.

5. .

6. . ERROR LEVELS

OFF Disables error level limits.

.1 % ±0.1% acceptable error.

.25 % ±0.25% acceptable error.

.5 % ±0.5% acceptable error.

1 % ±1.0% acceptable error.

2.5 % ±2.5% acceptable error.

5 % ±5.0% acceptable error.

Check Weighing Options

Check Weighing is enabled only when the Check Weighing Function is selected. This

feature may be used for check weighing or package weight control in any one of the

available weighing units. When in use, the display will show the relationship between

the load on the plartform, and the selected target weight. The bar graph will visibly

display where the weight of the load falls in relationship to the under, acceptable, and

over limits. The balance also displays UNDER, ACCEPT, and OVER messages as

appropriate. The default settings are: Reference = Reference weight, Display = normal.

Two choices are provided for programming the Reference Weight. One choice is the

use of a mass (package, container, etc,) and the other is a number which can be

entered as a high and low limit.

Three choices are provided for programming the display: normal, none, and sign.

Sample displays are shown on the next page.
53

 MENUS

NORMAL DISPLAYS

NONE DISPLAYS

SIGN DISPLAYS

NOTE: Samples of the displays for check weighing are shown as follows using a

reference weight of 50 grams. The over limit was set at 55 grams, and the lower limit

was set at 45 grams.

SAMPLE DISPLAYS

When normal is selected, the display indicates the actual weight.

When none is selected, the numeric section of the display is blank if the values

exceed the limits. Numbers appear only

if they are within the limits.

When sign is selected, the display spells

in words; HIGH, LOW or ACCEPT with no

weight values showing.
54

 MENUS

Check Weighing Options (Cont.) Check Weighing Options (Cont.)

The following procedure describes how to set up the balance for all choices. Before

starting, the Check Weighing option must have been selected under the Functions

submenu.

1. Access the submenu under the Setup Options sub

 menu.

2. (reference).

3. (reference weight).

4. .

 If REF WT is selected, a sample reference is used later to set the weight

 parameter into the balance. If NUMBER is selected, a number representing

 the sample weight has to be entered manually. See section titled Check

 Weighing.

5. .

6. .

7. .

8. , ,

.

9. .

 10. .

 11. .

 12. .

 13. .

48
55

 MENUS

Animal Weighing Options

Animal Weighing Options is enabled only when Animal Weighing Function is

selected. Animal weighing settings allow the balance to compensate for animal

activity.

Four settings are available: AW OPT levels, 0 through 3. AW0 should be used for

an inactive subject, where AW3 should be used for an active subject. The default

setting is AW1.

1. Access the submenu under the Setup Option submenu.

2. .

3. , ,

, for desired sensitivity.

4. .

5. .

6. .

Fill Option

Fill Option provides two choices for a reference weight (similar to check weighing).

Either a mass can be placed on the platform and used as a reference weight or a

number can be entered to establish the weight value. Both methods are used to

establish a reference for a 100% bar graph reading. Target parameter provides two

choices, one is fill to the reference, the other to zero. The following procedure

describes how to set up the balance for all choices. Before starting, the Fill Function

must have been selected.

1. to select the desired weighing unit, g, dwt, oz, etc.

2. Access the submenu under the Setup Options sub

menu.

3. (reference).

4. (reference weight).
56

 MENUS

Fill Option (Cont.) Fill Option (Cont.)

5. .

 If REF WT is selected, a sample reference weight is used later to set the

weight parameter into the balance. If NUMBER is selected, a number

representing the desired sample weight has to be entered. Select either REF WT

or NUMBER.

6. .

7. . When target is selected, the balance will

 show the normal weight of the object on the pan.

8. .

9. or . When

zero is selected, the balance indicates the weight as a negative number after

the reference is set in the main menu. When an object is placed on the

balance that weighs exactly what the reference was set to, the display shows

zero with a full bar graph.

 10. .

 11. .

 12. .

 13. .

 14. .

Time

Time is a feature which enables the balance to be set to the current time in either

U.S.A. standards (12 hour periods) or European/Military standards (24 hour periods).

The default setting is US Standard. To enter time, proceed as follows:

1. Access the submenu which is under the Setup menu.

2. .

3. .

4. or .

5. .
57

 MENUS

Time (Cont.) Time (Cont.)

6. .

7. first two digits are flashing.

8. or to change flashing digits to current local hour.

9. flashes the last two digits.

 NOTE: will back up display.

 10. or changes minutes display.

 11. to accept. AM or PM is flashing, A for AM, P for PM.

 12. to select AM or PM

 13. .

Date

Date is a feature which enables the balance to be set to a U.S.A. date standard or

European date standard. U.S. standard has the month, date followed by the year

each separated by (/) in the printout. The European date standard has the day first,

followed by the month and then the year each separated by a period. The default

setting is US Standard.

1. Access the submenu which is under Setup menu.

2. .

3. .

4. or .

5. .

6. .

7. flashes first two digits.

8. to change the first flashing digit to current month for US or day

 for European standard.

9. .
58

 MENUS

Date (Cont.) Date (Cont.)

10. to change flashing digit.

11. .

12. to change year.

13. .

14. .

15. .

NOTE: At power up, if Time in the GLP submenu is set to ON, the display flashes

for about 1.5 seconds to prompt setting of time and date .

Lockswitch

Lockswitch enables you to lock out one or more menu selections. Each menu can be

individually locked on or off after all functions have been set. The Calibration,

User, Setup and Print menus can be individually locked on or off by selecting the

appropriate menu and then locked by the switch located under the front of the control

panel. See Menu Lockout Section. Cal Test under Calibration remains functional with

the Lockswitch On or Off. Before performing the lockout procedure, decide which

functions of the balance are to be locked on or off.

 1. Access the submenu which is under the Setup menu.

 2. to access either Calibration, User, Setup or Print menus.

 3. to access selected desired menu.

 4. to select or .

YES = locked, NO = not locked. YES = locked, NO = not locked.

 5. to accept.

 6. to change to other menus.

 7. To change other menus, repeat steps 2 through 5.
59

 MENUS

List

This submenu can be used to output a listing of current menu settings via the RS232

interface. When selected, all menu settings for the User, Setup and Print menus will

be output either to an external printer or computer. To use this feature, your balance

must be connected to a computer or printer.

1. Access the submenu under the Setup or Print menus.

2. . . The display

indicates a series of dots traveling right to left when the balance is sending

information.

Exit Setup Menu

1. .

NOTE: If any Setup parameter is different from previous settings, indicator SETUP

in the display flashes while the balance is storing new settings. Proceed with next step.

2. .
60

 MENUS

PRINT MENU

The Print menu provides a number of options which includes: reset, communications,

good laboratory practices, and list. Reset sets all submenus contained in the Print

submenu to factory default settings. Communication specifies baud rate, number of

data bits, parity bit type and stop bits. GLP Good laboratory practices permits the

entering of your own identification number and project number which shows up on

printing. Print Options Enables/disables Auto print feature, specifies time interval for

automatic output of displayed data and/or a range of displayed weight values that

cannot be output. The following items can be turned on or off: Stable data-only

feature, numeric only or full display data for output, time, date. Also prints reference

weight value when using FillGuideTM or Parts Counting functions. Difference feature

indicates the difference between weight value currently being used and reference

value set into the balance. Items shown in bold type are default settings. Items shown

in italics in the print menu below appear only if the appropriate Functions are turned

on. Shaded areas only appear in the menu if the appropraite options are selected

in the Setup menu. Items shown in bold type are the default settings.

PRINT OPTIONS

Auto Print

Cont, interval,

on stb,off

Initialize Auto Print

Interval, non print lo,

non print hi

Stable Data

ON/OFF

Numeric Data

ON/OFF

Time

ON/OFF

Date

ON/OFF

Reference

ON/OFF/Current

Difference

ON/OFF

End, Print Opts.

LIST

END, PRINT

PRINT MENU

RESET**

YES/NO

COMMUNICATION

Baud

300, 1200, 2400, 4800, 9600

Data Bits

7 or 8

Parity Bit

Odd, Even, None,

1, 0

Stop Bits

1 or 2

End, Comm.

GLP

ID #

Project #

End,GLP

Print Menu Protection

The Print menu may be locked out to prevent unauthorized personnel from changing

settings. If SAFE is displayed, the Print menu has been locked out. Settings may be

viewed but not changed. To lock out the Print menu or unlock, refer to the section titled

Menu Lock-Out Protection.
61

 MENUS

Reset

This submenu enables you to reset all Print menu selections to the factory default

settings shown below. Reset does not appear if the menu has been locked out.

 Function Default

Baud Rate br2400

Data Bits 7 data

Parity None

Stop Bits 2 stop

Auto Print OFF

Autp Print interval 1 second

Non Print Low Limit 0

Non Print High Limit 0

Stable data Only OFF

Numeric Data Only OFF

Time OFF

Date OFF

Reference OFF

Difference OFF

1. .

2. .

3. .

4. .

5. or .

6. . If is selected, the

 balance signals a double short beep double short beep and all selections reset tp factory

 settings.

Communication

The Communication submenu contains submenus which permit the setting of: baud

rates, data bits, parity and stop bits necessary for communications to an external

printer or computer.

Access the submenu under the Print menu..
62

 MENUS

Baud Rate

This submenu is used to select the desired baud rate. There are five available baud

rates to choose from: 300, 1200, 2400, 4800 and 9600. The default setting is 2400

baud.

To view or change the baud rate:

1. Access the submenu.

2. .

3. , ,

, , ,

. Normal baud rate is 2400.

4. .

Data Bits

To set the number of data bits to 7 or 8:

1. Access the submenu.

2. .

3. or .

4. .

Parity

Parity can be set to Odd, Even or None. The default setting is None. To set parity,

proceed as follows:

1. Access the submenu.

2. .

3. , ,

 .

4. . .
63

 MENUS

Stop Bits

The number of stop bits can be set to 1 or 2. The default setting is 2. To set stop bits,

proceed as follows:

1. Access the submenu.

2. .

3. or .

4. .

Good Laboratory Practice (GLP) Good Laboratory Practice (GLP)

This submenu enables the storage of an identification number and/or a project

number. When entered into the balance, the identification number and project

number are available when printing. The reason the entries are made under the Print

submenu, is that when legal for trade operation (LFT) is enabled, the Setup submenu

is locked out, leaving the Print submenu free to make entries.

1. Access the submenu.

2. .

3. first digit is flashing.

4. changes the value of the first digit.

NOTE: allows going back to the previous digit for correction.

5. accepts value and moves to second digit.

6. to change next digit.

7. Repeat steps 4 through 6 to change all digits.

8. .

9. to enter project number.

 10. and repeat steps 3 through 7.

 11. .
64

 MENUS

Print Options

This submenu contains additional features which can be set and include Auto Print,

Initialize Auto Print, Stable Data only, Numeric Data only, Time, Date and Reference

data and Difference. To change any of the above listed options, enter the submenu.

Auto Print Feature

When enabled, the Auto Print feature causes the balance to automatically output

display data in one of three ways: continuously, at user specified time intervals, or

upon stability.

To select one of these Auto Print methods, or to turn the feature off:

1. Access the submenu.

2. .

3. , ,

 or .

4. .

NOTE: If you select interval to automatically output data at user specified time

intervals, the interval is entered in the Initialize submenu which follows.

Initialize

This submenu allows you to:

• Specify a time interval (in seconds) for automatic output.

• Exclude a range of weights from being output, or specify a range for output, by the

Auto Print feature.

It does not appear on the Print menu if Auto Print is set to OFF. Use the following

procedure to set these features:

1. Access the submenu under the Print Options submenu.

2. displays if Interval was selected in the Auto

Print submenu and you may continue with step 3. If interval was not selected,

 is displayed. Proceed to step 7.

3. to enter time interval for automatic data

output. The current interval from to

(in seconds) is displayed.
65

 MENUS

Initialize (Cont.)

4. to increase or to decrease the interval number.

5. .

6. to enter a range of non printing values.

7. , the

current value for the low end of the

range is displayed with the first digit

flashing.

8. to change the num

ber, start with the first digit (flashing).

Change the value to any number from

-9 to +9. A minus sign will light to

indicate a negative value.

9. to accept it and the next digit

will begin flashing.

 10. Set all digits in the same manner. If an error is made, to backup

 to the desired digit and change it.

 11. After the last digit is entered, is displayed again.

 12. for the high limit.

 13. indicates current high end value.

 14. Repeat steps 8 through 10 to change the numbers as required.

 15. After the last digit is entered, displayed again.

 16. .

 17. .

To exclude data

WITHIN SELECTED RANGE:

SET non-PL < non-PH

Example:non-PL=7g, non-PH=11g

Values <7 OR >11 will be output.

To exclude data

OUTSIDE SELECTED RANGE:

Set non-PL > non-PH

Example:non-PL=11g, non-PH=7g

Values >7 AND <11 will be output.
66

 MENUS

Print Stable Data Only

When enabled, this feature permits only stable display data to be output. To set the

feature ON or OFF, proceed as follows:

1. Access the submenu under the Print Options menu.

2. .

3. or .

4. .

Time

When the Time function is set ON, allows the balance to output the current time to the

printer. To set the Time feature ON or OFF, proceed as follows:

1. Access the submenu under the Print Options menu

2. .

3. or .

4. .

Print Numeric Data Only

This submenu is used to select numeric data only, or full display data for RS232

output. Set this feature ON to output numeric display data only, or OFF to output full

display data as follows:

1. Access the submenu under the Print Options menu.

2. .

3. or .

4. .
67

 MENUS

Reference

When the Reference function is set ON, prints the value of weight used as a reference

in either Check Weighing, Fill Guide, Percent and Parts Counting modes. When set

to Current, the printer prints the current reference immedediately.

1. Access the submenu under the Print Options menu

2. .

3. , or

.

4. .

Date

When the Date function is set ON, allows the balance to output the current date to

the printer. To set the Date feature ON or OFF, proceed as follows:

1. Access the submenu under the Print Options menu

2. .

3. or .

4. .

NOTE: With Print Time or Date set to ON, if either current Time or Date has not been

set in Setup menu, "Set Time/Date !" is sent through the RS232 Interface with each

press of button.

Difference

Difference data is only output to the printer when Check Weighing or Fill GuideTM mode

was selected.

1. Access the submenu under the Print Options menu

2. .

3. or .

4. .
68

 MENUS

List

This submenu can be used to output a listing of current menu settings via the RS232

interface. When selected, all menu settings for the User, Setup and Print menus will

be output either to an external printer or computer. To use this feature, your balance

must be connected to a computer or printer.

1.Access the submenu under the Setup or Print menus.

2. The display indicates a series of dots traveling right to left when the balance is sending

information.
69

 MAINTENANCE

CARE AND MAINTENANCE

To keep the balance operating properly, the housing and platform should be kept

clean and free from foreign material. If necessary, a cloth dampened with a mild

detergent may be used. Keep calibration masses in a safe dry place.

PROBABLE CAUSE(S)

Power cord not plugged in

or properly connected to

balance.

Balance was not rezeroed before weighing.

Balance not properly

calibrated.

Desired unit/mode not

set to ON in Unit Selection

of Setup menu.

End not being used to exit

menus.

Print menu settings not

properly set up.

Cable connections.

Microprocessor locks up.

Lock set ON.

(LFT set ON)

Vibration on table surface.

SYMPTOM

Unit will not turn on.

Incorrect weight reading.

Cannot display weight in

desired unit or cannot

access desired weighing

mode.

Unable to store menu

settings/changes.

RS232 interface not

working.

Random segments

displayed or display

locks up.

Unable to change

settings.

Unstable readings.

Error message display.

TROUBLESHOOTING

REMEDY

Check power cord

connections.

Press with no

weight on the platform,

then weigh item.

Recalibrate correctly.

See Unit Selection section

of Setup menu.

You MUST use End to exit

menus and save settings.

Verify interface settings in

Print menu correspond to

those of peripheral device.

Check cable connections.

Turn power off, then turn

on again. If condition

persists, unit must be

serviced.

Set Lock switch to OFF.

Place balance on a stable

surface or change

averaging level.

See Error Codes list.
70

 MAINTENANCE

Error Codes List Error Codes List

The following list describes the various error codes and which can appear on the

display and the suggested remedy.

Data Errors

0.0 Transient error (hardware error, probably static discharge). If error persists,

the balance must be serviced.

Tare Errors

2.0 Balance is unable to stabilize within time limit after taring. Environment is too

hostile or balance needs recalibration.

2.1 Power on load out of specification.

Calibration Errors

3.0 Incorrect or no calibration weight used for calibration. Recalibrate with correct

weights.

RS232 Errors

4.0 Bad RS232 frame. Check RS232 menu parameters and correct.

4.4 RS232 buffer is full (if installed). May occur if no printer or computer is

connected to the interface. To clear buffer, turn balance off or enter Print menu

and select END.

4.5 Function is disabled by the Lock switch.

User Errors

7.0 User entry out of bounds.

7.1 Bad percent (%) mode, sample too low.

7.2 Number outside of display capacity.

Over-Under Load Errors

8.0 Hardware error causing an internal weight signal which is too low. Check if

platform or platform support is off. If not, the balance must be serviced.

8.1 Hardware error caused by an internal weight signal which is too high. Check

load on the platform which may be excessive. If error persists, the balance

must be serviced.
71

 MAINTENANCE

Error Codes List (Cont.) Error Codes List (Cont.)

CheckSum Errors

8.2 Power-on load out of specification: Balance was turned on with load on platform

or platform off balance. No load may be on platform when turned on and

platform must be in place.

8.3 Rated capacity exceeded. Remove excessive weight from platform.

8.4 Underload condition on balance. Check that the proper platform and platform

support are installed.

9.0 Bad factory checksum. If error persists, have the balance serviced.

9.5 Bad factory calibration checksum. If error persists, have the balance serviced.

9.6 Bad mode checksum. Turn the balance off using the front panel controls. If

the error persists, have the balance serviced.

9.7 Invalid setup data checksum. Check Setup, User and Print menus (when

RS232 is installed) settings. If possible, try to enter menus and exit using END

to restore menu settings. May be caused by a faulty component, or in rare

cases, a severe static charge. If error persists, balance must be serviced.

9.8 Hardware error causing invalid calibration data checksum. Balance may need

recalibration - particularly linearity calibration. If error persists, balance must be

serviced.

9.9 Invalid temperature compensation checksum. Balance will work with default

temperature compensation data, however, error will occur each time balance

is turned on. Have balance serviced.
72

 MAINTENANCE

SERVICE INFORMATION

If the Troubleshooting section does not resolve or describe your problem, you will

need to contact an authorized Ohaus Service Agent. For Service assistance in the

United States, please call Ohaus Corporation toll-free at (800) 526-0659. An Ohaus

Product Service Specialist will be available to help you.

REPLACEMENT PARTS

Description Ohaus Part No.

In-Service Cover Kit 76901-00

In-Service Cover (GT8000) 76657-02

In-Service Cover Plate 76815-01

Power Cord, 120 V, U.S. 6569-00

Fuses 100/120 V .315 AT 90167-45

220/240 V .160 AT 90167-42

ACCESSORIES

Description Ohaus Part No.

Calibration Masses - ASTM Class 1 Tolerance:

4kg 49046-11

2kg 49026-11

1kg 49016-11

400g 49045-11

200g 49025-11

100g 49015-11

Security Device (GT210, GT410, GT410D, GT2100, GT4100, GT4100D) 76288-00

Animal Container Kit (GT2100, GT4000, GT4100 and GT4100D) 76290-01

Animal Container (GT2100, GT4000, GT4100 and GT4100D) 76431-01

Animal Container Cover (GT2100, GT4000, GT4100 and GT4100D) 3052-00

Glass Draft Shield Kit (GT210, GT400, GT410 and GT410D) 76510-01

Scoops

Aluminum - 1-1/2" x 2' x 7/16" 5076-00

Aluminum - 2-1/4" x 3' x 3/4" 5077-00

Footed Stainless Steel 1078-03

Footed Polypropylene 1011-20
73

 MAINTENANCE

MODEL GT210 GT410 GT410D GT400 GT2100

Capacity (g) 210 410 100/410* 410 2100

dwt 135 263 60/263* 263 1350

c 1000 2000 500/2000* 2000 10000

oz avd 7 14 3.5/14* 14 74

oz t 6 13 3.2/13* 1 3 67.5

gn 3240 6327 1543/6327* 6327 32407

mommes 56 109 26.6/109* 109 560

lb avd 0.44 0.88 0.22/0.88* 0.88 4.6

Readability (g) 0.001 0.001 0.001/0.01* 0.01 0.01

dwt 0.001 0.001 0.001/0.01* 0.01 0.01

c 0.005 0.005 0.005/0.05* 0.05 0.05

oz avd 0.00005 0.00005 0.00005/0.0005* 0.0005 0.0005

oz t 0.00005 0.00005 0.00005/0.0005* 0.0005 0.0005

gn 0.02 0.02 0.02/0.2* 0.2 0.2

mommes 0.0005 0.0005 0.0005/0.005* 0.005 0.005

lb avd 0.000002 0.000002 0.000002/0.00002* 0.00002 0.00002

Weighing modes g, dwt, ct, oz , oz t, gn, taels, mommes, lb, 1 custom unit

Functions percent, parts counting, check weighing, animal weighing, FillGuideTM, high point

Options GLP,statistics, net/gross, auto tare, volume determination, time, date,

lockswitch, LFT (U.S.)/type approved

Repeatability 0.001 0.001 0.001/0.005* 0.007 0.01

(Std. dev.) (g)

Linearity (g) +0.002 +0.002 +0.002/0.01* +0.01 +0.02

Tare range Full Capacity by Subtraction

Stabilization time 2 seconds

Sensitivity drift 4 ppm/ °C 3 ppm/°C 4 ppm/ °C 4 ppm/ °C 4 ppm/ °C

(10°- 30°C)

Operating 50° to 104°F/10° to 40°C (Non-type approved)

temperature 50° to 86°F/10° to 30°C (Type Approved)

Calibration Auto-calibration

Power requirements 100, 120, 220, 240 V ac, 50/60 Hz

Display (in/cm) Vacuum fluorescent (0.4/1 high)

Platform size (in/cm) 4.9/12.4 diameter 6.6/16.8 diameter

Dimensions

(WxHxD) (in/cm) 7.5 x 3.75 x 12.75/19 x 9.5 x 32.4 without draft shield

Net Weight (lb/kg) 11/5 8/4 11/5

Shipping Weight (lb/kg) 17.1/8 17.5/8 17.5/8 13.3/6 17.8/8

*Moveable FineRangeTM

SPECIFICATIONS

NOTICE: These specifications are for non-type approved balances.
74

 MAINTENANCE

MODEL GT4100 GT4100D GT4000 GT8000 GT8000T

Capacity (g) 4100 1000/4100* 4100 8100 8100

dwt 2630 643/2630* 2630 5200 5200

c 20000 5000/20000* 20000 40000 40000

oz avd 144 35/144* 144 285 285

oz t 131 32/131* 131 260 260

gn 63272 15432/63272* 63272 125002 125002

mommes 1093 266/1093* 1093 2160 2160

lb avd 9 2.2/9* 9 17.8 17.8

Readability (g) 0.01 0.01/0.1* 0.1 0.1 0.1

dwt 0.01 0.01/0.1* 0.1 0.1 0.1

c 0.05 0.05/0.5* 0.5 0.5 0.5

oz avd 0.0005 0.0005/0.005* 0.005 0.005 0.005

oz t 0.0005 0.0005/0.005* 0.005 0.005 0.005

gn 0.2 0.2/2* 2 2 2

mommes 0.005 0.005/0.05* 0.05 0.05 0.05

lb avd 0.00002 0.00002/0.0002* 0.0002 0.0002 0.0002

Weighing modes g, dwt, ct, oz , oz t, gn, taels, mommes, lb, 1 custom unit

Functions percent, parts counting, check weighing,animal weighing,FillGuideTM, high point

Options GLP,statistics, net/gross, auto tare, volume determination, time, date,

lockswitch, LFT (U.S.)/type approved

Repeatability 0.01 0.01/0.05* 0.07 0.07 0.07

(Std. dev.) (g)

Linearity (g) +0.02 +0.02/0.1* +0.1 +0.1 +0.

Tare range Full Capacity by Subtraction

Stabilization time 2 seconds

Sensitivity drift 3 ppm/ °C 4 ppm/ °C 15 ppm/ °C

(10°- 30°C)

Operating 50° to 104°F/10° to 40°C (Non-type approved)

temperature 50° to 86°F/10° to 30°C (Type Approved)

Calibration Auto-calibration

Power requirements 100, 120, 220, 240 V ac, 50/60 Hz

Display (in/cm) Vacuum fluorescent (0.4/1 high)

Platform size 6.6/16.8 diameter 7 x 7/ 8.9 x 7/22.6 x 17.8

(W x H x D) (in/cm) 17.8 x 17.8

Dimensions 7.5 x 16.75 x 12.75/

(WxHxD) (in/cm) 7.5 x 3.75 x 12.75/19 x 9.5 x 32.4 without draft shield 19 x 42.5 x 32.38

Net Weight (lb/kg) 11/5 8/4 21/10

Shipping Weight (lb/kg) 17.8/8 14.6/7 24.9/11 29.9/14

* Moveable FineRangeTM

SPECIFICATIONS (Cont.) SPECIFICATIONS (Cont.)
75

LIMITED WARRANTY

Ohaus products are warranted against defects in materials and

workmanship from the date of delivery through the duration of the

warranty period. During the warranty period Ohaus will repair, or, at

its option, replace any component(s) that proves to be defective at no

charge, provided that the product is returned, freight prepaid, to

Ohaus.

This warranty does not apply if the product has been damaged by

accident or misuse, exposed to radioactive or corrosive materials,

has foreign material penetrating to the inside of the product, or as a

result of service or modification by other than Ohaus. The warranty

period shall begin at the date of installation, or three months from

shipment to the buyer, whichever occurs first. A properly completed

Warranty Registration Card must be received by Ohaus within 30

days from date of purchase to initiate coverage under the warranty.

No other express or implied warranty is given by Ohaus Corporation.

Ohaus Corporation shall not be liable for any consequential damages.

As warranty legislation differs from state to state and country to

country, please contact Ohaus or your local Ohaus dealer for further

details.
76

Ohaus Corporation

29 Hanover Road,

Florham Park, NJ 07932, USA

Tel: (973) 377-9000,

Fax: (973) 593-0359

With offices worldwide

P/N 76769-16 R1095 © Ohaus Corporation 1995, all rights reserved.
ENTER THE MAIN MENU

Press and hold , release when MENU is displayed. The calibration menu

CAL is automatically displayed after MENU. CAL is one of the four primary menus

used in the balance. The primary menus are: CAL, USER, SETUP and PRINT.

CHANGE PRIMARY MENUS

When the CAL menu is displayed, each press of places the balance in the

next menu as follows: USER, SETUP, PRINT, END and back to CAL.

ENTER THE SUBMENUS

Pressing when in a primary menu places the balance in the first parameter

which can be set in that submenu. For example, when in the USER primary menu,

the first parameter in that submenu is RESET. To access each of the remaining

parameters, simply press once for each parameter. Repeated pressing

of cycles through all of the parameters.

SET BALANCE PARAMETERS

After a parameter has been accessed in the submenu, for example RESET, press

 to display the Reset options Yes or No. Press to change the option

from Yes to No and back again. To accept the setting, press which brings the

balance back to the parameter heading, RESET in this case.

SAVE YOUR SETTINGS AND EXIT THE MENUS

After parameters have been set, press repeatedly until the end of the menu is

reached. End is displayed, press one time then press repeatedly until

EndMENU is displayed, and press to return to weighing.

H

O

W

T

O

HOW TO
PRINT

RESET

Yes/No

COMMUNICATION

Baud

300, 1200,

2400, 4800,

9600

Data Bits

7 or 8

Parity Bit

Odd, Even,

None, 1, 0

Stop Bits

1 or 2

End, Comm.

GLP

ID #

Project #

End

PRINT OPTIONS

Auto Print

Initialize Auto Pt.

Stable Data

Numeric Data

Time

Date

Reference

Difference

End, Print Opts.

LIST

END, PRINT

CAL

CAL SPAN

CAL LINEARITY

CAL USER

Enter #

CAL TEST

END, CAL

USER

RESET

YES/NO

AL

0, 1, 2, 3

STABILITY

.5d, 1d, 2d, 5d

AUTO ZERO

OFF, .5d, 1d,

3d

BEEP

ON/OFF

END, USER

GT MENU STRUCTURE

This illustration identifies the four Main menus and Submenus. The factory

default settings in the submenus are shown in bold type with the exception

of the Setup Options and Print options which are shown in their respective

menus in the manual. Shaded areas only appear in the menu if the

appropriate function or weighing unit is selected in the Setup menu.

SETUP OPTIONS

(Cont.)

PC Error

CW Option

Reference Type

Displays Type

End, CW Opts.

AW Option

Fill Option

Reference Type

Target Direction

End, Fill Opts.

End

TIME

Set

Enter #

Type

US, Euro

End, Time

DATE

Set

Enter #

Type

US, Euro

End, Date

LOCKSWITCH

Cal

YES/NO

User

YES/NO

Setup

YES/NO

Print

YES/NO

End, Lockswitch

LIST

END, SETUP

SETUP

RESET

YES/NO

LFT

ON/OFF

SELECT UNITS

g, dwt, ct, oz, oz t,

UNIT 1 (grain), t

UNIT 2 (mommes),

lb, UNIT 3 (custom)

FUNCTIONS

Percent

Parts Counting

Check Weighing

Animal Weighing

FillGuideTM

High Point

None

SETUP OPTIONS

Statistics

Enable

Standard Dev.

Mean

Sum

High

Low

Difference

End, Statistics

Net

Auto Tare

Custom Units

Factor

Density

End

GLP

Time

S/N

BAL ID #

Proj. #

Cal

Name

End, GLP1

P/N76769-17
PRECISION Advanced

Electronic Balances

Models

GT210, GT400, GT410, GT480,

GT2100, GT4000, GT4000L,

GT100, GT4400G, GT4400L,

GT4800, GT8000, GT8000T

Precision Advanced

Electronic Balance

Model GT310

SUPPLEMENT

Preface

This supplement is intended to be used in conjunction with the Precision Advanced

Electronic Balances GT Series Instruction Manual. Unless otherwise specified in this

supplement, the Instruction Manual contains the necessary procedures for setting up,

calibrating, operating and maintaining the balance.

© Ohaus Corporation 1995, all rights reserved.
2

INTRODUCTION

This supplement describes the basic differences for Models GT310, GT310E and

GT310V which are not covered in the GT Series Instruction Manual.

UNPACKING

Your Precision Advanced balance was shipped with the following items:

• Platform

• Platform Support

• Power Cord

• Below Balance Weighing Hook

• Draft Shield

• Instruction Manual

• Warranty Card

• In-Service Cover

It is recommended to save the carton and packing material for storing, transporting the

balance or returning it for service.

Draft Shield

To install the Draft Shield:

1. Remove the two existing screws and

washers located on top of the balance.

2. Position the Draft Shield on top of the

balance as shown.

3. Insert the two screws, with washers

(supplied with the Draft Shield) though

the holes in the Draft Shield into the

balance. Tighten both screws securely.

Platform and Platform Support Platform 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.

DRAFT SHIELD

PLATFORM

PLATFORM

SUPPORT
3

MODEL GT310

Capacity (g) 310

dwt 195

ct 1550

oz avd 10

oz t 9.9

gn 4784

mommes 82

lb avd 0.68

Readability (g) 0.001

dwt 0.001

ct 0.005

oz avd 0.00005

oz t 0.00005

gn 0.02

mommes 0.0005

lb avd 0.000002

Weighing modes g, dwt, ct, oz , oz t, gn, taels, mommes, lb, 1 custom unit

Functions percent, parts counting, check weighing, animal weighing, FillGuideTM, high point

Options GLP,statistics, net/gross, auto tare, volume determination, time, date,

lockswitch, LFT (U.S.)/type approved

Repeatability 0.001

(Std. dev.) (g)

Linearity (g) +0.002

Tare range Full Capacity by Subtraction

Stabilization time 2 seconds

Sensitivity drift 4 ppm/ °C

(10°- 30°C)

Operating 50° to 104°F/10° to 40°C (Non-type approved)

temperature 50° to 86°F/10° to 30°C (Type approved)

Calibration Auto-calibration

Power requirements 100, 120, 220, 240 V ac, 50/60 Hz

Display (in/cm) Vacuum fluorescent (0.4/1 high)

Platform size (in/cm) 4.9/12.4 diameter

Dimensions

(WxHxD) (in/cm) 7.5 x 3.75 x 12.75/19 x 9.5 x 32.4 without draft shield

Net Weight (lb/kg) 11/5

Shipping Weight (lb/kg) 17.1/8

SPECIFICATIONS

NOTICE: These specifications are for non-type approved balances.
4

Calibration Masses

Before beginning calibration, make sure

masses are available. If you begin calibration and realize calibration masses are not

available, exit the menu. The balance will

retain previously stored calibration data.

Calibration should be performed as necessary to ensure accurate weighing. Masses

required to perform the procedures are

listed in the adjacent table.

CALIBRATION MASSES

LINEARITY SPAN ONLY

MODEL MASSES MASSES

GT310 200g, 300g 300g

Masses must meet or exceed ASTM Class 1

Tolerance. Calibration masses are available

as accessories.

PARTS INFORMATION

If you require replacement parts or would like to purchase accessories, please call

Ohaus Corporation toll-free at (800) 526-0659, an Ohaus Product Parts Specialist will

be available to help you.

REPLACEMENT PARTS

Description Ohaus Part No.

In-Service Cover Kit 76901-00

In-Service Cover Plate 76815-01

Power Cord, 120 V, U.S. 6569-00

Fuses 100/120 V .315 AT 90167-45

 220/240 V .160 AT 90167-42

ACCESSORIES

Description Ohaus Part No.

Calibration Masses - ASTM Class 1 Tolerance:

100g 49015-11

200g 49025-11

Security Device (GT310) 76288-00

 Glass Draft Shield Kit (GT310) 76510-01

P/N76769-18

Ohaus Corporation

29 Hanover Road,

Florham Park, NJ 07932, USA

Tel: (201) 377-9000,

Fax: (201) 593-0359

Ohaus Europe Ltd.

Cottenham, Cambridge, ENGLAND

Tel: +44 954 251343, Fax: +44 954 250205

Ohaus GmbH

Giessen, GERMANY

Tel: +49-(0) 641-71023, Fax: +49 (0) 641-71025

Ohaus de Mexico, S.A. de C.V.

Mexico, D.F. MEXICO

Tel: +52-5-586-4905, +52-5-752-5746, Fax: +52-5-754-7024

Ohaus Corporation

Mississauga, Ontario, CANADA

Tel: (905) 566-5859, Fax: (905) 277-1232

Ohaus s.a.r.l.

Viroflay, FRANCE

Tel: +33-1-39-24-0193, Fax: +33-1-39-24-0194

Ohaus Japan Division

Takarazuka, JAPAN

Tel: +81-797-74-2479, Fax: +81-797-74-2343

Ohaus Instrumentos S.A.

Barcelona, SPAIN

Tel: & Fax: +34 3 223 3440