GX SERIES
GX-200/GX-300/GX-400
GX-600/GX-800/GX-1000
GX-2000/GX-3000/GX-4000/GX-6100
GX-6000/GX-8000

Multi-Function Balance
INSTRUCTION MANUAL

1WMPD4000087E

© 2014 A&D Company Ltd. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated
into any language in any form by any means without the written permission of A&D
Company Ltd.

The contents of this manual and the specifications of the instrument covered by thismanual are subject to change for improvement without notice.

Windows, Word and Excel are registered trademarks of the Microsoft Corporation.

CONTENTS
Basic Operation
1. INTRODUCTION .............................................................................................................................3
1-1 About This Manual.............................................................................................................................. 3
1-2 Features ............................................................................................................................................. 3
1-3 Compliance......................................................................................................................................... 4

2. UNPACKING THE BALANCE ........................................................................................................6
2-1 Unpacking........................................................................................................................................... 6
2-2 Installing the Balance ......................................................................................................................... 7

3. PRECAUTIONS ..............................................................................................................................8
3-1 Before Use.......................................................................................................................................... 8
3-2 During Use.......................................................................................................................................... 9
3-3 After Use ........................................................................................................................................... 10
3-4 Power Supply ................................................................................................................................... 10

4. DISPLAY SYMBOLS AND KEY OPERATION..............................................................................11
5. WEIGHING UNITS ........................................................................................................................12
5-1 Units.................................................................................................................................................. 12
5-2 Storing Units ..................................................................................................................................... 15

Adapting to the Environment
6. WEIGHING ....................................................................................................................................17
6-1 Basic Operation (Gram Mode) ......................................................................................................... 17
6-2 Counting Mode (PC)......................................................................................................................... 18
6-3 Percent Mode (Pct)........................................................................................................................... 20
6-4 Animal Weighing Mode (Hold Function) ........................................................................................... 21

7. RESPONSE ADJUSTMENT / SELF CHECK FUNCTION ............................................................22
7-1 Automatic Response Adjustment / Self Check Function .................................................................. 22
7-2 Manual Response Adjustment.......................................................................................................... 23

8. CALIBRATION ..............................................................................................................................24
8-1 Calibration Group ............................................................................................................................. 24
8-2 Automatic Self Calibration (Calibration due to changes in temperature) ................................... 25
8-3 Calibration Using the Internal mass (One-Touch Calibration) .................................................... 25
8-4 Calibration Using an External Weight............................................................................................... 26
8-5 Calibration Test Using an External Weight ....................................................................................... 28
8-6 Correcting the Internal Mass Value .................................................................................................. 30

Functions9. FUNCTION SWITCH AND INITIALIZATION.................................................................................32
9-1 Permit or Inhibit ................................................................................................................................ 32
9-2 Initializing the Balance...................................................................................................................... 33

10. FUNCTION TABLE .....................................................................................................................34
10-1 Structure and Sequence of the Function Table .............................................................................. 34
10-2 Display and Keys............................................................................................................................ 341

10-3 Details of the Function Table .......................................................................................................... 35
10-4 Description of the Class “Environment, Display” ............................................................................ 38
10-5 Description of the Item “Data output mode” ................................................................................... 40
10-6 Description of the Item “Data format” ............................................................................................. 41
10-7 Description of the Data Format Added to the Weighing Data ............................................................... 43
10-8 Data Format Examples ................................................................................................................... 44
10-9 Clock and Calendar Function ......................................................................................................... 46
10-10 Comparator Function .................................................................................................................... 48

11. ID NUMBER AND GLP REPORT................................................................................................50
11-1 Setting the ID Number .................................................................................................................... 50
11-2 GLP Report ..................................................................................................................................... 51

12. DATA MEMORY ..........................................................................................................................54
12-1 Notes on Using Data Memory ........................................................................................................ 54
12-2 Memory for Weighing Data ............................................................................................................. 55
12-3 Memory for Calibration and Calibration Test Data.......................................................................... 58
12-4 Memory for Unit Mass in the Counting Mode ................................................................................. 59

13. UNDERHOOK .............................................................................................................................60
14. PROGRAMMABLE-UNIT ...........................................................................................................61

RS-232C Serial Interface
15. DENSITY MEASUREMENT ........................................................................................................62
16. RS-232C SERIAL INTERFACE / EXTERNAL INPUT ................................................................65
17. CONNECTION TO PERIPHERAL EQUIPMENT ........................................................................67
17-1 Connection to the AD-8121B Printer .............................................................................................. 67
17-2 Connection to a Computer.............................................................................................................. 67
17-3 Using Windows Communication Tools (WinCT) ............................................................................. 68

18. COMMANDS ...............................................................................................................................70
18-1 Command List................................................................................................................................. 70
18-2 Acknowledge Code and Error Codes ............................................................................................. 71
18-3 Command Example ........................................................................................................................ 72
18-4 Control Using CTS and RTS .......................................................................................................... 76
18-5 Settings Related to RS-232C ......................................................................................................... 76

Maintenance
19. MAINTENANCE ..........................................................................................................................77
20. TROUBLESHOOTING ................................................................................................................77
20-1 Checking the Balance Performance and Environment................................................................... 77
20-2 Error Codes .................................................................................................................................... 78
20-3 Asking For Repair ........................................................................................................................... 81

21. SPECIFICATIONS.......................................................................................................................82
22. OPTIONS ....................................................................................................................................84
23. EXTERNAL DIMENSIONS .........................................................................................................87
24. TERMS/INDEX............................................................................................................................882

1. INTRODUCTION
This manual describes how the GX series balance works and how to get the most out of it in termsof performance.
Read this manual thoroughly before using the balance and keep it at hand for future reference.

1-1 About This ManualThis manual consists of the following five parts:
Basic operation ...............................Describes precautions on handling the balance, balance
construction and basic balance operation.
Adapting to the environment ...........Describes response adjustment, calibration and calibration
test.
Functions ........................................Describes various functions of the balance.
RS-232C serial interface.................Describes the interface which transmits data and controls thebalance.
Maintenance ...................................Describes maintenance,
specifications and options.

error

codes,

troubleshooting,

1-2 Features
 Built-in Calibration Weight (hereinafter referred to as internal mass), allows easy calibration,
adjustment and maintenance of the balance.
 Automatic Self Calibration, using the internal mass, adapting to changes in temperature.
 Self Check Function, provided to self-check the balance using the internal mass.
 Automatic Response Adjustment, adapting to vibration and drafts in the environment.
 Stabilization time of one second. When FAST is selected for the response rate, a stabilization
time of one second, to read a displayed value after a sample is placed on the pan, has beenachieved.
 Data Memory Function, storing weighing data, calibration data or unit mass in the counting
mode. (About weighing data, 200 sets of data can be stored.) Interval Memory Mode isprovided to weigh a sample and store the weighing data periodically.
 Good Laboratory Practice (GLP) data output using the standard RS-232C serial interface.
 Windows Communication Tools (WinCT), allows easy communication with a Windows-based
personal computer.
Windows is the registered trademark of the Microsoft Corporation.
 Clock and Calendar Function, adding the time and date to the output data.
 Comparator Indicators, displaying the comparison results.
 Capacity Indicator, displaying the weight value in percentage relative to the weighing capacity.

3 Hold Function, provided for weighing a moving object such as an animal.
 Underhook, for measuring density and weighing magnetic materials.
 Density Mode, for calculating the density of a solid.
 Multiple Weighing Units, with most of the common units used around the world.
 Reference Card, provided for a quick reference to the balance operation.
 Breeze Break, provided for GX-200/300/400/600/800/1000, for more accurate weighing.

1-3 Compliance
Compliance with FCC Rules
Please note that this device generates, uses and can radiate radio frequency energy. This
device has been tested and has been found to comply with the limits of a Class A computing
device pursuant to Subpart J of Part 15 of FCC rules. These rules are designed to provide
reasonable protection against interference when this device is operated in a commercial
environment. If this unit is operated in a residential area, it may cause some interference andunder these circumstances the user would be required to take, at his own expense, whatevermeasures are necessary to eliminate the interference.
(FCC = Federal Communications Commission in the U.S.A.)

Compliance With Directives of CE markThis device features radio interference suppression, safety regulation and restriction ofHazardous Substances in compliance with the following Council Directives
Council directive 2004/108/EC EN61326 EMC directive
Council directive 2006/95/EC
EN60950 Safety of Information Technology Equipment
Council directive 2011/65/EU
EN50581 Restriction of the use of certain Hazardous Substances
The CE mark is an official mandatory European marking.
Please note that any electronic product must comply with local laws and regulations when soldor used anywhere outside Europe.

45

2. UNPACKING THE BALANCE
2-1 Unpacking
 The balance is a precision instrument. Unpack the balance carefully. Keep the packing
material to be used for transporting the balance in the future.
 The packing contents depend on the balance model. See the illustrations to confirm thateverything is contained.

GX-200/300/400/600/800/1000

Note
Please confirm that the AC adapter type is correct
for your local voltage and receptacle type.

6

GX-2000/3000/4000/6100/6000/8000

Note
Please confirm that the AC adapter type is correct
for your local voltage and receptacle type.

2-2 Installing the Balance
Install the balance as follows:
1. Refer to “3. PRECAUTIONS” for installing the balance. Place the balance on a solid weighingtable.
2. GX-200/300/400/600/800/1000
Assemble the breeze break on the balance as shown in the illustration above.
GX-2000/3000/4000/6100/6000/8000
Assemble the breeze ring and weighing pan on the balance as shown in the illustration above.
3. Adjust the leveling feet to level the balance. Confirm it using the bubble spirit level.
4. Confirm that the adapter type is correct for the local voltage and power receptacle type.
5. Connect the AC adapter to the balance. Warm up the balance for at least 30 minutes withnothing on the weighing pan.

7

3. PRECAUTIONS
To get the optimum performance from the balance and acquire accurate weighing data, note thefollowing:

3-1 Before Use
 Install the balance in an environment where the temperature andhumidity are not excessive. The best operating temperature isabout 20°C / 68°F at about 50% relative humidity.
 Install the balance where it is not exposed to direct sunlight andit is not affected by heaters or air conditioners.
 Install the balance where it is free of dust.
 Install the balance away from equipment which produces
magnetic fields.
 Install the balance in a stable place avoiding vibration andshock. Corners of rooms on the first floor are best, as they areless prone to vibration.
 The weighing table should be solid and free from vibration,
drafts and as level as possible.
 Level the balance by adjusting the leveling feet and confirm itusing the bubble spirit level.
 Ensure a stable power source when using the AC adapter.
 Warm up the balance for at least 30 minutes. Plug in the AC
adapter as usual.
 Calibrate the balance before use or after having moved it toanother location.

Caution
Do not install the balance where flammable or corrosive gas is present.

83-2 During Use
 Discharge static electricity from the material to beweighed (hereinafter referred to as sample). When asample could have a static charge, the weighing data is
influenced. Ground the balance and try the following:
Eliminate the static electricity by AD-1683 as an accessory.
Or try to keep the ambient humidity above 45%RH.
Or use a metal shield case.
Or wipe a charged plastic sample with the wet cloth.
 This balance uses a strong magnet as part of thebalance assembly, so please use caution whenweighing magnetic materials such as iron. If there is aproblem, use the underhook on the bottom of thebalance to suspend the material away from theinfluence of the magnet.
 Cancel the temperature difference between a sample and the environment. When a sample iswarmer (cooler) than the ambient temperature, the sample will be lighter (heavier) than thetrue weight. This error is due to a rising (falling) draft around the sample.
 Make each weighing gently and quickly to avoid errors due to changes in the environmental
conditions.
 Do not drop things upon the weighing pan, or place a sample on the pan that is beyond thebalance weighing capacity. Place a sample in the center of the weighing pan.
 Do not use a sharp instrument such as a pencil to press the keys. Use your finger only.
 Press the RE-ZERO key before each weighing to prevent possible errors.
 Calibrate the balance periodically so as to prevent possible errors.
 Take into consideration the affect of air buoyancy on a sample when more accuracy isrequired.
 Keep the balance interior free of dust and foreign materials.
The breeze break (GX-200/300/400/600/800/1000 only) and the clear main unit cover areprovided as accessories. The breeze break components may be charged with static electricity
when they are unpacked or when the humidity is low. If the weighing value is unstable or thebalance has a problem with repeatability, remove the breeze break. Or wipe the clear plateswith a moistened cloth, use an accessory DC static eliminator, AD-1683, or apply an anti-static
spray.

9

3-3 After Use Avoid mechanical shock to the balance.
 Do not disassemble the balance. Contact the local A&D dealer if the balance needs service orrepair.
 Do not use organic solvents to clean the balance. Clean the balance with a lint free cloth thatis moistened with warm water and a mild detergent.
Avoid dust and water so that the balance weighs correctly. Protect the internal parts from liquid
spills and excessive dust.

3-4 Power Supply
Do not remove the AC adapter while the internal mass is in motion, for example, right after the
AC adapter is connected, or during calibration using the internal mass.
If the AC adapter is removed under the conditions described above, the internal mass will beleft unsecured, that may cause mechanical damage when the balance is moved.
Before removing the AC adapter, press the ON:OFF key and confirm that zero is displayed.
When the AC adapter is connected, the balance is in the standby mode if the standby indicatoris on (refer to “4. DISPLAY SYMBOLS AND KEY OPERATION”). This is a normal state anddoes not harm the balance. For accurate weighing, warm up the balance for at least 30 minutes
before use.

10

4. DISPLAY SYMBOLS AND KEY OPERATIONKey operation
Key operation affects how the balance functions. The basic key operations are:
 “Press and release the key immediately” or “Press the key”
= normal key operation during measurement
 “Press and hold the key”

Display symbols
Response indicators(Displayed for about 30 seconds
when weighing starts.)

・Displays data stored in memory
・Displays the weighing data relative to theweighing capacity, in percentage, in theweighing mode (Capacity indicator)

Animal mode indicator
Comparator
indicators

Processing indicator
Stabilization indicatorStandby indicator

Units

Weighing dataor stored data

Interval memory
standby indicator

Data number of thedata currently displayed
Processing indicator
Blinking indicators

Interval memory
active indicator

Prior notice indicator of
automatic self calibration
Each key, when pressed or when pressed and held, functions as follows:
Key

When pressed

When pressed and held

Turns the display on and off. The standby indicator is displayed when the display isturned off. The weighing mode is enabled when the display is turned on.
This key is available anytime. Pressing the key during operation will interrupt theoperation and turn the display off.
In the weighing mode, turns the minimum Enters the function table mode. Refer toweighing value on and off.
“10. FUNCTION TABLE”.
In the counting or percent mode, enters
the sample storing mode.
Switches the weighing units stored in the Performs response adjustment and self
function table. Refer to “5. WEIGHING check.
UNITS”.
Performs calibration of the balance using Displays other items of the calibration
the internal mass.
menu.
Stores the weighing data in memory or
outputs to a printer or personal computer
using the RS-232C interface (Factory
setting), depending on the function tablesettings.
Sets the display to zero.

11

No function at the factory setting
By changing the function table:
Outputs “Title block” and “End block” for
GLP report.
Displays the data memory menu.

5. WEIGHING UNITS
5-1 Units
With the GX series balance, the following weighing units and weighing modes are available :
g

PC

Pct

OZ

Lb

L OZ

OZt

ct

mm

dwt

GN

TL

t

MS

DS

Counting mode
Percent mode
Density mode (To use this mode, it must be stored in the function table as described on
page 15. For details about this mode, refer to "15. DENSITY MEASUREMENT".
To select this mode, press the MODE key until the processing indictor
blinks with the unit "g" displayed. "DS" appears only when the density
value is displayed.)
Programmable-unit (No unit displayed. For details, refer to "14. PROGRAMMABLE-UNIT".)A unit or mode can be selected and stored in the function table as described on page 15.
If a weighing mode (or unit of weight) has been turned off, that mode or unit will be missing in thesequence. Tael has four varieties, one of which can be selected and installed at the factory.
To select a unit or mode for weighing, press the MODE key.
For details about the units and modes, see the table below:
Function table
Conversion factor
Name (unit, mode)
Abbrev.
Display(Storing mode)
1g=
Gram
g
1g
Counting mode
PC
Percent mode
Pct
Ounce (Avoir)
OZ
28.349523125 g
Pound
Lb
453.59237 g
Pound/Ounce
L OZ
l0
1Lb=16 oz,
1 oz=28.349523125 g
Troy Ounce
OZt
31.1034768 g
Metric Carat
ct
0.2 g
Momme
mm
3.75 gPennyweightdwt
1.55517384 g
Grain (UK)GN
0.06479891 g
Tael (HK general, Singapore)
37.7994 g
Tael (HK jewelry)
37.429 g
TL
Tael (Taiwan)
37.5 gTael (China)
31.25 gTola (India)t
11.6638038 g
MessghalMS
4.6875 g
Density mode
DS
(See note below)
is used toshow the density.
Programmable-unit (Multi-unit)

Mlt

Note: The blinking processing indicator with “g” indicates that the density mode is selected.

12

The tables below indicate the weighing capacity and the minimum display for each unit, dependingon the balance model.

Unit

GX-200

GX-300

GX-400GX-600GX-800

GX-1000

Minimum
display

1100

0.001

Capacity
Gram

210

310

410

610

810

Ounce (Avoir)

7.40

10.93

14.46

21.51

28.57

38.80

0.00005

Pound

0.462

0.683

0.903

1.344

1.785

2.425

0.000005

0Lb 7.41oz

0Lb 10.93oz

0Lb 14.46oz

1Lb 5.52oz

1Lb 12.57oz

2Lb 6.80oz

0.01ozTroy Ounce

6.75

9.96

13.18

19.61

26.04

35.36

0.00005

Metric Carat

1050

1550

2050

3050

4050

5500

0.005

Momme

56.0

82.6

109.3

162.6

216.0

293.3

0.0005

Pennyweight

135

199

263

392

520

707

0.001

Grain (UK)

3240

4784

6327

9413

12500

16975

0.02

Tael (HK general,
Singapore)

5.55

8.20

10.84

16.13

21.42

29.10

0.00005

Tael (HK jewelry)

5.61

8.28

10.95

16.29

21.64

29.38

0.00005

Tael (Taiwan)

5.60

8.26

10.93

16.26

21.60

29.33

0.00005

Tael (China)

6.72

9.92

13.12

19.52

25.92

35.20

0.00005

Tola (India)

18.0

26.5

35.1

52.2

69.4

94.3

0.0001

Messghal

44.8

66.1

87.4

130.1

172.8

234.6

0.0005

GX-6100

Minimum
display

6100

0.01

Pound/Ounce

Unit

GX-2000

GX-3000

GX-4000

Capacity
Gram

2100

3100

4100

Ounce (Avoir)

74.0

109.3

144.6

215.1

0.0005

Pound

4.62

6.83

9.03

13.44

0.00005

4Lb 10.08oz

6Lb 13.35oz

9Lb 0.62oz

13Lb 7.17oz

0.01ozTroy Ounce

67.5

99.6

131.8

196.1

0.0005Metric Carat

10500

15500

20500

30500

0.05

Momme

560

826

1093

1626

0.005

Pennyweight

1350

1993

2636

3922

0.01

Grain (UK)

32408

47840

63272

94137

0.2

Tael (HK general,
Singapore)

55.5

82.0

108.4

161.3

0.0005

Tael (HK jewelry)

56.1

82.8

109.5

162.9

0.0005

Tael (Taiwan)

56.0

82.6

109.3

162.6

0.0005

Tael (China)

67.2

99.2

131.2

195.2

0.0005

Tola (India)

180

265

351

522

0.001

Messghal

448

661

874

1301

0.005

Pound/Ounce

13

Unit

GX-6000

GX-8000

Capacity
Gram

6100

Minimum
display8100

0.1

Ounce (Avoir)

215

285

0.005

Pound

13.4

17.8

0.0005

13Lb 7.17oz

17Lb 13.72oz

0.01ozTroy Ounce

196

260

0.005

Metric Carat

30500

40500

0.5

Momme

1626

2160

0.05

Pennyweight

3922

5208

0.1

Grain (UK)

94136

125002

2

Tael (HK general,
Singapore)

161

214

0.005

Tael (HK jewelry)

162

216

0.005

Tael (Taiwan)

162

216

0.005

Tael (China)

195

259

0.005

Tola (India)

522

694

0.01

Messghal

1301

1728

0.05

Pound/Ounce

145-2 Storing Units
The units or modes can be selected and stored in the function table. The sequence of displaying theunits or modes can be arranged to fit the frequency of use.
The units stored are maintained in non-volatile memory, even if the AC adapter is removed.
Select a unit or mode and arrange the sequence of display as follow s:
1 Press and hold the SAMPLE key until ba5fnc of
the function table is displayed, then release the key.

Press and hold

2 Press the SAMPLE key several times to display
1Unit .

Press
several times

3 Press the PRINT key to enter the unit selection mode.

4 Specify a unit or mode in the order to be displayedusing the following keys.
SAMPLE key

To sequentially display the units.

RE-ZERO key

To specify a unit or mode. The
stabilization indicatorappears when the displayed unit
or mode is specified.

SelectDisplays the units
sequentially.

Specify

5 Press the PRINT key to store the units or modes. Thebalance displays end and then displays the next
menu of the function table.
6 Press the CAL key to exit the function table. Then thebalance returns to the weighing mode with the selected unit.

7 To select other unit or mode for weighing, press the MODE key.

15

Store

Unit setting example
The example below sets the units in the order with g (gram) as the first unit followed by pc(counting mode).
1

Press and hold the SAMPLE key until ba5fnc of
the function table is displayed, then release the key.

Press and holdPressseveral times

2

Press the SAMPLE key several times to display
1Unit .

3

Press the PRINT key to enter the unit selection mode.

4

Press the RE-ZERO key to specify the unit of g
The stabilization indicatorappears when theunit is specified.

Specify

5

Press the SAMPLE key to display 1Unit pC .

Select6

Press the RE-ZERO key to specify the unit of pc
The stabilization indicatorappears when theunit is specified.

Specify

7

Press the PRINT key to store the units.
The balance displays end and then displays thenext menu item of the function table.

Store

8

Press the CAL key to exit the function table. Then thebalance returns to the weighing mode with g,the unit
selected first.

9

Press the MODE key to switch between g and pc(gpc).

16

6. WEIGHING
6-1 Basic Operation (Gram Mode)
1 Place a container on the weighing pan, if necessary.
Press the RE-ZERO key to cancel the weight (tare). Thebalance displays 0.00 g. (The decimal point position
depends on the balance model.)Weighing
panContainer

Sample2 Place a sample on the pan or in the container.

3 Wait for the stabilization indicator
Read the value.

to be displayed.

4 Remove the sample and container from the pan.
Notes

Remove thesampleTo use other units, press the MODE key and select anappropriate unit.
Press the SAMPLE key to turn on or off the minimum
weighing value.
The weighing data can be stored in memory. For details,
refer to “12. DATA MEMORY”.

When the ON:OFF key is pressed with a container placedon the weighing pan and weighing is started, the balance
automatically cancels the weight (tare) and displays 0.00 g.

(Display off)
Weighing
panContainer17

6-2 Counting Mode (PC)This is the mode to determine the number of objects in a sample based on the standard sample unitmass. Unit mass means the mass of one sample. The smaller the variables in each sample unit
mass is, the more accurate the counting will be. The GX series balance is equipped with theAutomatic Counting Accuracy Improvement (ACAI) function to improve the counting accuracy.
Notes
For counting, use samples that have a unit mass at least ten times greater than that of theminimum display in grams.
If the sample unit mass variable is too large, it may cause a counting error.
To improve the counting performance, use the ACAI function frequently or divide the samples
into several groups and count each group.

Selecting the counting mode
1 Press the MODE key to select pC (counting mode).

Storing a sample unit mass
2 Press the SAMPLE key to enter the sample unit massstoring mode.
Even in the storing mode, pressing the MODE key willswitch to the next mode.
3 To select the number of samples, press the SAMPLE key
several times. It may be set to 10, 25, 50 or 100.
Note
A greater number of samples will yield more accurate
counting result.

Weighingpan
4 Place a container on the weighing pan, if necessary.
Press the RE-ZERO key to cancel the weight (tare). The
number specified in step 3 appears.
e.g.:
25 0 pC is displayed if 25 is selected in step 3.

5 Place the number of samples specified on the pan. In thisexample, 25 pieces.
to be displayed.
6 Wait for the stabilization indicator
Press the PRINT key to calculate and store the unit mass.
The balance displays 25 pC (counting mode) and is
set to count samples with this unit mass. (The sample unit
mass is stored in non-volatile memory, and is maintainedeven if the AC adapter is removed.)
To improve the accuracy of the unit mass, proceed tostep 8.

18

Container

Sample(25 pieces)

NotesIf the balance judges that the mass of the samples is toolight and is not adequate to be used as the unit mass, it
displays lo . Do not use the samples.
If the balance judges that the mass of the samples is toolight to aquire accurate weighing, it displays an error
requiring the addition of more samples to the specified
number. In the example above, 150- pC appears,
requiring 25 more samples. Add 25 samples and press
the PRINT key. When the unit mass is stored correctly,
the balance proceeds to the counting mode.

Place sample
to be counted

Counting operation
7 Place the samples to be counted on the pan.

Note

The counting result

Up to 20 unit masses can be stored in memory for themultiple sample. For details, refer to “12. DATA MEMORY”.

Counting mode using the ACAI function
The ACAI is a function that improves the accuracy of the unit
mass automatically by increasing the number of samples as
the counting process proceeds.
8 If a few more samples are added, the processing indicator turns on. To prevent an error, add
three or more. The processing indicator does not turn on if overloaded. Try to add the same
number of samples as displayed.
9 The balance re-calculates the unit mass while the processing indicator is blinking. Do nottouch the balance or samples on the pan until the processing indicator turns off.
10 Counting accuracy is improved when the processing indicator turns off.
Each time the above operation is performed, a more accurate unit mass will be obtained.
There is no definite upper limit of ACAI range for the number of samples exceeding 100. Try
to add the same number of samples as displayed.
11

Remove all the samples used in ACAI and proceed with the counting operation using theimproved unit mass.

196-3 Percent Mode (Pct)This is the mode to display the weight value in percentage compared to a 100% reference mass andis used for target weighing or checking the sample variable.

Selecting the percent mode
1 Press the MODE key to select pct (percent mode). If thepercent mode can not be selected, refer to “5.
WEIGHING UNITS”.

Storing the 100% reference mass
2 Press the SAMPLE key to enter the 100% reference
mass storing mode.
Even in the storing mode, pressing the MODE key willswitch to the next mode.
3 Place a container on the weighing pan, if necessary.
Press the RE-ZERO key to cancel the weight (tare). Thebalance displays 100 0 pct .

4 Place the sample to be set as the 100% reference masson the pan or in the container.

Weighing
panContainer

Sample(100%)

5 Press the PRINT key to store the reference mass. Thebalance displays 100.00 pct . (The decimal point position
depends on the reference value. The reference massstored is stored in non-volatile memory, and is maintainedeven if the AC adapter is removed.)
Note
If the balance judges that the mass of the sample is toolight to be used as a reference, it displays lo. Do notuse the sample.
6 Remove the sample.

Place sample
to be weighed

Reading the percentage
7 Place a sample to be compared to the reference mass on
the pan. The displayed percentage is based on the 100%
reference mass.

Weighing resultcompared to 100%
reference mass20

6-4 Animal Weighing Mode (Hold Function)
This is the mode to weigh a moving object such as an animal, even when the display of the weighing
data fluctuates. The hold function allows the average weight of the animal to be displayed.
To use the hold function, set the function in the function table. For details, refer to “10. FUNCTIONTABLE” and “10-4 Description of the Class “Environment, Display””.

21

7. RESPONSE ADJUSTMENT / SELF CHECK FUNCTION
This function detects the influence on weighing that is caused by drafts and/or vibration at the place
where the balance is installed and sets the response characteristic automatically. When this function
is selected, the balance self-checks the performance at the same time.
Two modes of response adjustment are available: automatic andmanual.

Response indicators
The function has three rates as follows:

Changing the response rate changes the display refresh rate.
Indicator
FAST
MID.
SLOW

Parameter
Cond 0Cond 1
Cond 2

Response characteristic
Fast response, Sensitive value
Slow response, Stable value

Display refresh rate
If the response rate is changed as follows:
MID. or SLOWFAST =10 times/second
FAST
MID. or SLOW = 5 times/second

Note
To set the refresh rate of 5 times/second when the response rate is FAST or 10 times/second
when the response rate is MID. or SLOW, change the “Display refresh rate (5pd)” parameterof “Environment, Display (ba5fnc)” in the function table. For details, refer to “10. FUNCTIONTABLE”.

7-1 Automatic Response Adjustment / Self Check Function
This function automatically updates the response adjustment by analyzing the influence of theenvironment on the weighing data and also self-checks the balance performance using the internal
mass.

Operation
1 Press and hold the MODE key until RESPONSE isdisplayed, then release the key.

2 The balance automatically starts to check the balance
performance and sets the response characteristic.

Press and holdthe key
Release the key

Caution
Do not allow vibration or drafts to affect the balance
during adjustment.
3 After automatic adjustment, the balance displays the
updated response indicator and returns to theweighing mode. The response indicator remains
displayed for about 30 seconds.
e.g. “ MID. OK

Displays the results.

”

The example above indicates that the result of the self check is good and MID. is selected as
the response rate.

22

NotesIf improper performance is found in the self check, thebalance displays CH no . Contact the local A&D
dealer for repair.
If the automatic response adjustment fails, thebalance displays CH ng . Check the ambientconditions such as breeze and vibration, also checkthe weigning pan. Then, perform the adjustment again.
To return to the weighing mode, press the CAL key.
If the automatic response adjustment is awkward, try
to refine it using the manual response adjustment.

7-2 Manual Response Adjustment
This function manually updates the response adjustment.

Operation
1 Press and hold the MODE key until RESPONSE isdisplayed, then release the key.

Press and holdthe key

Press the MODE key again quickly.

Release the key
and press again

2 Press the MODE key to select a rate of the response
adjustment. Either FAST, MID. or SLOW can beselected.
3 After a few seconds of inactivity the balance displays
eend . Then, it returns to the weighing mode anddisplays the updated response indicator. The
response indicator remains displayed for about 30
seconds.
Note
The response adjustment can be changed at “Condition(Cond)” of “Environment, Display (ba5fnc)” in thefunction table. For details, refer to “10. FUNCTIONTABLE”.

23

Each pressing
switches
the indicators
After a while

8. CALIBRATION
8-1 Calibration GroupThe GX series balance has the following modes as a calibration group.
Calibration
 Automatic self calibration (calibration due to changes in temperature
 Calibration using the internal mass (one-touch calibration)
 Calibration using an external weight
Calibration test
 Calibration test using an external weight (Calibration test does not perform calibration.)
Correction of the internal mass value

Terms
The following terms are defined as follows:
Internal mass
= Built-in calibration weight
External weight= A weight that you have. Referred to as a calibration weight when used for calibration.
Calibration weight = A weight used for calibration
Target weight= An external weight used for calibration test

Caution Calibration adjusts the balance for accurate weighing.
Besides periodic calibration and before each use, perform calibration when:• the balance is installed for the first time.
• the balance has been moved.
• the ambient environment has changed.
 Do not allow vibration or drafts to affect the balance during calibration.
 To output the data for GLP using the RS-232C interface, set “GLP output ( info )” of “Data output( dout )”. For details, refer to “10. FUNCTION TABLE”. Time and date are added to GLP report. If thetime or date is not correct, adjust them. For details, refer to “10-9 Clock and Calendar Function”.
 Calibration test is available only when “GLP output ( info )” of “Data output ( dout )” is set to “1” or “2”, The calibration and calibration test data can be stored in memory. To store them, set “Datamemory ( data )” to “3”. For details, refer to “12. DATA MEMORY”.

Caution on using an external weight The accuracy of an external weight can influence the accuracy of weighing. Select anappropriate weight as listed below:
Model
Usable calibration weight
Adjustable range
GX-200200 g, 100 g
GX-300300 g, 200 g, 100 g
GX-400400 g, 300 g, 200 g-0.015 g to +0.015 g
GX-600600 g, 500 g, 400 g, 300 g, 200g
GX-800800 g, 700 g, 600 g, 500 g, 400 g, 300 g, 200g
GX-1000 1000g, 900g, 800 g, 700 g, 600 g, 500 g, 400 g, 300 g, 200g
GX-2000 2000 g, 1000 g
GX-3000 3000 g, 2000 g, 1000 g-0.15 g to +0.15 g
GX-4000 4000 g, 3000 g, 2000 g
GX-6100 6000 g, 5000 g, 4000 g, 3000 g, 2000g
GX-6000 6000 g, 5000 g, 4000 g, 3000 g, 2000g-1.5 g to +1.5 g
GX-8000 8000 g, 7000 g, 6000 g, 5000 g, 4000 g, 3000g, 2000g
The calibration weight in bold type: factory setting
The calibration weight value can be adjusted within the range above.

DisplayThis indicator means “the balance is measuring calibration data”. Do notallow vibration or drafts to affect the balance while this indicator is displayed.

24

8-2 Automatic Self Calibration (Calibration due to changes in temperature)
This function automatically calibrates the balance when the balance detects an ambient temperaturechange. If GLP output is selected in the function table, the balance outputs the calibration report or storesthe data in memory. Automatic self calibration functions even if the display is turned off (standby state). ,CautionIf something is on the weighing pan, the balance judges that it is in use and does not perform
automatic self calibration. To maintain the calibrated state, keep the weighing pan clear while
not in use.
The displays shown below are related to the automatic self calibration.
Indicates that the balance detects a change in ambient temperature andautomatic self calibration will start. If the balance is not used for a few
minutes with this indicator blinking, the balance performs automatic selfcalibration. The blinking duration depends on the environment.
Indicates that the balance is measuring calibration data. Do not allow
vibration or drafts to affect the balance while this indicator is displayed. Aftercalibration, the balance returns to indicate the previous display.
Note
The balance can be used while the indicator blinks. But, it is recommended that to maintainthe accuracy, stop using the balance and confirm that there is nothing on the pan and allow
the balance to perform self calibration.

8-3 Calibration Using the Internal mass (One-Touch Calibration)
This function calibrates the balance using the internal mass. The only operation required is to press
the CAL key

Operation
1 Connect the AC adapter and warm up the balance for at least 30 minutes with nothing on theweighing pan.
2 Press the CAL key.
3 The balance displays Calin and performs calibration using the internal mass. Do not allow
vibration or drafts to affect the balance.
4 The balance displays end after calibration. If the “GLP output (info)” parameter of thefunction table is set to “1” or “2”, the balance displays glp and outputs “Calibration Report”
using the RS-232C interface or stores the data in memory. For details on the calibration reportformat, refer to “11-2 GLP Report”.
5 The balance will automatically return to the weighing mode after calibration.

About the internal mass
The mass of the internal mass (approximately 500 g) may change due to corrosion or otherdamage caused by the operating environment, or due to aging. Check the internal mass
periodically. Correct the internal mass value as necessary. For details, refer to “8-6 Correcting theinternal mass value”.
To maintain the weighing accuracy, perform the calibration using an external weight periodically,
as described below.

258-4 Calibration Using an External WeightThis function calibrates the balance using an external weight.

Operation
1 Connect the AC adapter and warm up the balance
for at least 30 minutes with nothing on the pan.
2 Press and hold the CAL key until
displayed, then release the key.

3 The balance displays

CaloutPress andhold the key

isReleasethe key

Cal 0 .

 If you want to change the calibration weight (alist of usable weights is shown on page 24),press the SAMPLE key and proceed to step 4.
 If you use the calibration weight value stored in
the balance, proceed to step 5.

Select aweight4 Specify the calibration weight value as follows:
SAMPLE key

To
switchthedisplay
condition to: “All of thesegments
blinking”(calibration weight selectionmode) or “The last two digits
blinking” (value adjustmentmode).

RE-ZERO key

To select the calibration
weight or adjust the value. In
the value adjustment mode,-15 digits appear after +15
digits.

PRINT key

To store the new weightvalue. Even if the AC
adapter is removed, the data
is maintained in non-volatilememory.

CAL key

To cancel the operation andreturn to 1Cal 0 .

Note
Digit, when used for the GX series balance,
indicates a unit of minimum weighing value.

26

To next pagee.g. Calibration
weight value
1000.12 g

From previous page
5 Confirm that there is nothing on the pan and press
the PRINT key. The balance measures the zero
point. Do not allow vibration or drafts to affect thebalance.
The balance displays the calibration weight value.

6 Place the displayed calibration weight on the pan
and press the PRINT key. The balance measuresthe calibration weight. Do not allow vibration ordrafts to affect the balance.

7 The balance displays
from the pan.

end . Remove the weight

8 If the “GLP output (info)” parameter, of thefunction table, is set to “1” or “2”, the balancedisplays glp and outputs “Calibration Report”
using the RS-232C interface or stores the data inmemory. For details on the calibration report format,
refer to “11-2 GLP Report”.
9 The balance will automatically return to theweighing mode.
10

Calibration
weightPlace the calibration weight on the pan and confirm
that the value displayed is within 2 digits of thespecified value. If it is not within the range, checkthe ambient conditions such as breeze andvibration, also check the weighing pan. Then,
repeat steps 1 to 10.

27

GLP output

8-5 Calibration Test Using an External WeightThis function tests the balance weighing accuracy using an external mass and outputs the result.
This is available only when the “GLP output (info)” parameter is set to “1” or “2”. (Calibration test
does not perform calibration.)

Operation
1 Connect the AC adapter and warm up the balance
for at least 30 minutes with nothing on the pan.
2 Press and hold the CAL key until
displayed, then release the key.

CCout

Press andhold the key

is

3 The balance displays CC 0 .
 If you want to change the target weight (a list of
usable weights is shown on page 24), press the
SAMPLE key and proceed to step 4.
 If you use the target weight value stored in thebalance, proceed to step 5.

Releasethe key

Select aweight4 Specify the target weight value as follows:
SAMPLE key
To
switchthedisplay
condition to: “All of thesegments blinking” (target
weight selection mode) or“The last two digits blinking”(value adjustment mode).
RE-ZERO key

PRINT key

CAL key

To select the target weight or
adjust the value. In the value
adjustment mode, -15 digits
appear after +15 digits.
To store the new weightvalue. Even if the AC
adapter is removed, the data
is maintained in non-volatilememory.
To cancel the operation andreturn to 1CC 0 .

Note
Digit, when used for the GX series balance,
indicates a unit of minimum weighing value.

28

e.g. Target
weight value
1000.12 g
To next page

From previous page
5 Confirm that there is nothing on the pan and press the
PRINT key. The balance measures the zero point anddisplays the measured value. Do not allow vibration ordrafts to affect the balance.
The balance displays the target weight value.

6 Place the displayed target weight on the pan and press
the PRINT key. The balance measures the target weightand displays the measured value. Do not allow vibration
or drafts to affect the balance.

7 The balance displays
pan.

Target weightend . Remove the weight from the

8 The balance displays glp and outputs “Calibration
Test Report” using the RS-232C interface or stores the GLP output
calibration test data in memory. For details on thecalibration test report format, refer to “11-2 GLP Report”.
9 The balance will automatically return to the weighing
mode.

29

8-6 Correcting the Internal Mass ValueThe GX series balance can correct the internal mass value within the range shown below. Thisfunction corrects the internal mass value to conform to an external weight. The corrected mass value
is maintained in non-volatile memory even if the AC adapter is removed.
The internal mass value is corrected as follows:
Model
GX-200
GX-300
GX-400GX-600GX-800
GX1000
GX-2000
GX-3000
GX-4000
GX-6100
GX-6000
GX-8000

Correction reference value

Correction range

200.000 g
400.000 g-0.020 g to +0.020 g

500.000 g

2000.00 g-0.20 g to +0.20 g

2000.0 g-2.0 g to +2.0 g

Example: Using the GX-400

Use the same weight200 g

Correct the internal mass
by +0.012 g in 400.000 g.
Calibrate the balance withthe corrected internal mass.

200 g

Operation
1 Calibrate the balance using the internal mass (one-touch
calibration). Then, place an external weight and confirm
the value to be corrected.
In the example, the value is off by -0.006 gram and thecorrection reference value of the GX-400 is 400 grams. So,
the value is to be corrected by 0.012 gram in 400.000 grams.
2 Press the ON:OFF key to turn off the display.
3 While pressing and holding the PRINT key and the
SAMPLE key, press the ON:OFF key. The balancedisplaysp5 .

30With these keys
held down

Press the key

4 Press the PRINT key. Then the balance displays thefunction switches.

Set the function table switch and internal mass correction
switch to “1” as shown above using the following keys.
SAMPLE key To select the switch to change the value.
RE-ZERO key To change the parameter of the switch
selected.
5 Press the PRINT key to store the new setting. Thebalance returns to the weighing mode.
6 Press and hold the SAMPLE key to enter the function
table and release the key when ba5fnc is displayed.

7 Press the SAMPLE key several times until
displayed.

C5in

Press andhold

is

8 Press the PRINT key to enter the procedure for correcting
the internal mass value.
9 Correct the internal mass value using the following keys.
RE-ZERO key
PRINT key
CAL key

To select the value.
(-20 digits appear after +20 digits.)
To store the new value and display thenext menu of the function table.
To cancel the correction and display
the next menu of the function table.

10

Press the CAL key. The balance returns to the weighing mode.

11

Press the CAL key to calibrate the balance using theinternal mass.

12

Place the external weight on the pan and confirm that the correction has been performed
properly. In this example, confirm that the value displayed is within 2 digits of 200.000 grams,
or within 0.002 gram.
If the internal mass value has not been corrected properly, repeat the procedure, starting atstep 6 and adjust the correction value.

31

9. FUNCTION SWITCH AND INITIALIZATION
9-1 Permit or Inhibit
The balance stores parameters that must not be changed carelessly (e.g. Calibration data for
accurate weighing, Data for adapting to the operating environment, Control data for the RS-232C
interface). There are five switches for the purpose of protecting these parameters. Each switch canselect either “permit” or “inhibit”. “Inhibit” protects parameters against careless operations.

Switches

Operation
1 Press the ON:OFF key to turn off the display.
2 While pressing and holding the PRINT key and the SAMPLE key, press the ON:OFF key. Thebalance displays p5 .
3 Press the PRINT key. Then the balance displays the function switches.
4 Set the switches using the following keys.
SAMPLE key

To select the switch to change the parameter.

RE-ZERO key

To change the parameter of the switch selected.
0:To inhibit changes.

1:To permit changes

PRINT key

To store the new parameter and return to the weighing mode.

CAL key

To cancel the operation. (Clris displayed.)

To return to the weighing mode, press CAL key once again.

32

9-2 Initializing the BalanceThis function returns the following parameters to factory settings.
 Calibration data Function table The sample unit mass value (counting mode), 100% reference mass value (percent mode) The data that is stored in the balance using the data memory function
 External calibration weight and target weight value
 Function switch settings Liquid density and temperature in the density modeNote
Be sure to calibrate the balance after initialization.

Operation
1 Press the ON:OFF key to turn off the display.
2 While pressing and holding the PRINT key and the
SAMPLE key, press the ON:OFF key. The balancedisplays p5 .

3 Press the SAMPLE key to display

Clr .

4 Press the PRINT key.
To cancel this operation, press the CAL key.

5 Press the RE-ZERO key.

6 Press the PRINT key to initialize the balance.
The balance will automatically return to the weighing
mode.

33

With these keys
held down

Press the key

10. FUNCTION TABLE
The function table reads or rewrites the parameters that are stored in the balance. These parameters
are stored in non-volatile memory, and are maintained even if the AC adapter is removed.

10-1 Structure and Sequence of the Function Table
The function table menu consists of two layers. The first layer is the “Class” and the second layer is
the “Item”. Each item stores a parameter.

ExampleThis example sets “Stores weighing data” for “Data memory” and “Every 1 minute” for “Interval time”.

10-2 Display and Keys
Display/Key

Description
The symbol “” indicates that the parameter displayed is in effect.

When pressed and held in the weighing mode, enters the function table mode.
Selects the class or item in the function table mode.
Changes the parameter.
When a class is displayed, moves to an item in the class.
When an item is displayed, stores the new parameter and displays the next class.
When an item is displayed, cancels the new parameter and displays the nextclass.
When a class is displayed, exits the function table mode and returns to theweighing mode.

34

10-3 Details of the Function TableClass

Parameter

Item

Cond
Condition

5t-b
Stability band width

Hold

Hold function

ba5fncEnvironment
Displaytrc

Zero tracking

5pd

Display refresh rate

pnt
Decimal point

p-on

Auto display-ON

poff

Auto display-OFF

g5i

Capacity indicator

Cl adjOFF
ON
OFF
NormalStrongVery strong
5 times/second
10 times/second
Point (.)
Comma (,)
OFF
ON
OFF
ON (10 minutes)
OFFON

See "10-9 Clock and Calendar
Function"Clock

Cp fnc

0
1
2
0
1
2
0
1
0
1
2
3
0
1
0
1
0
1
0
1
0
1

Description
Fast response, sensitive value FAST Can be changed byresponse adjustment.
MID.
With "Hold 1", sets the
Slow response, stable value SLOW averaging time.
The stabilization indicator
Stable when within 1 digit
illuminates with the display
fluctuation within the range.
With "Hold 1", sets the
Stable when within 3 digits
stabilization range.

Cp
Comparator mode

Comparator

0
1

Period to refresh thedisplay
Decimal point format
Turns on the weighing
mode display when AC
adapter is connected.
Turns off the display after
10 minutes of inactivity.
Capacity indicator.
Zero: 0%Maximum capacity: 100%
Confirms and sets the timeand date.The time and dateare added to output data.

No comparison
Comparison, excluding "near zero"
when stable value or overloaded

0
1
2
3

Weighing input, upper/lower
selected.
limitsDigital input, reference value Cp ref,Cp l t can be
Weighing input, reference value selected.

3
4

Cp Hi
Upper limit

Keeps zero display bytracking zero drift.

Comparison, including "near zero"
when stable value or overloaded
Continuous comparison,
excluding "near zero"Continuous comparison,
including "near zero"
Digital input, upper/lower limits

2

Cp in
Input method

Holds the display whenstable in animal mode. With
"Hold 1", ANIMAL turns on.

See "10-10 Comparator Function"

Cp lo

Cp Hi,Cp lo can be

Displayed when Cpin 0
or Cpin 1 is selected.

Lower limit

Cp ref
Reference value

See "10-10 Comparator Function" Displayed when Cpin 2

or Cpin 3 is selected.

Cp lmtTolerance
Factory setting

Note: "Digit" is a unit of miminum weighing value.

35

ClassItem

Parameter

0
dout

prt

Data output

Data output mode

ap-pAuto print polarity

ap-b
Auto print differencedata
Data memory

intInterval timed-no
Data number output

5-td
Time/Date output

5-id
ID number output

pU5e
Data output pause

at-fAuto feedinfo
GLP output

ar-d
Zero after output

Key mode

Description
Accepts the PRINT key only
when the display is stable.

Auto print mode A

1(Reference = zero)

Outputs data when the
dispaly is stable andconditions of ap-p, ap-b

2

Auto print mode B(Reference = last stable value)

and the reference value aremet.

3Stream mode /Interval memory mode

With data 0, outputs data
continuously; with data 2,

Plus only
Minus onlyuses interval memory.
Displayed value>Reference
Displayed value<Reference

0
1
2
0
1
2
0
1
2
3
0
1
2
3
4
5
6
7
8
0
1
0
1
2
3
0
1
0
1
0
1
0
1
2
0
1

Both
10 digits
100 digits
1000 digits
Not used

Regardless of displayed value
Difference between
reference value anddisplayed valueStores unit mass in counting mode Related items: prt, int,

Stores weighing datad-no, 5-td, info

Stores calibration data

Every measurement
Every 2 seconds
Every 5 seconds
Every 10 seconds
Every 30 seconds
Every 1 minuteInterval time in the interval
memory mode(with prt 3, data 2)

Every 2 minutes
Every 5 minutes
Every 10 minutes
No output
OutputSee "12. DATA MEMORY".

No output
Time only
Date only

Selects whether or not thetime or date is added to theweighing data.
For details, see "10-9 Clockand Calendar Function".

Time and date
No output
OutputNo pause
Pause (1.6 seconds)

Not usedUsed
No output
AD-8121 format
General data format
Not used
Used

Factory setting

36

Selects whether or not the
ID number is output.
Selects the data output
interval.
Selects whether or not auto
feed is performed.
Selects GLP output method.
For how to set time anddate to be added, see "10-9
Clock and Calendar
Function".
Adjusts zero automaticallyafter data is output.

Class5if

Item

Descriptioneter*600 bps

CTS, RTS control

0
1
2
3
4
0
1
2
0
1
0
1
2
3
4
5
0
1
0
1
0
1

ldin

0

Water temperature

1

Liquid density

bp5

Serial interface Baud rate

btpr
Data bit, parity bit

Crlf
Terminator

type
Data format

t-Up
Timeout

erCd
AK, Error code

Ct5
d5 fncParam-

Density function Liquid density input

mlt
Programmable-unit (Multi-unit)

Unit

Unit

C5 in

1200 bps
2400 bps
4800 bps
9600 bps
7 bits, even7 bits, odd
8 bits, none
CR LF

CR: ASCII code 0Dh

CR

LF: ASCII code 0Ah

A&D standard format
DP format

See "10-6 Description of

KF format

Item "Data Format".

MT format
NU format
CSV format
No limit
1 second

Selects the wait time toreceive a command.

No output

AK: ASCII code 06h

OutputNot usedControls CTS and RTS.

Used
Available only whendensity mode is selected.
See "15. DENSITYMEASUREMENT".

Sets an arbitrary coefficient.
See "14. PROGRAMMABLE-UNIT".

Available only when
programmable-unit modeis selected.

See "5. WEIGHING UNITS".
Displayed only when theinternal mass value
correction switch is set to 1.

Internal mass value correction

See "8. CALIBRATION".

id

See "11. ID NUMBER AND GLP REPORT".

ID number setting

Factory setting

CautionThe balance may not transmit the data completely at the specified refresh rate, depending on
the baud rate or data added to the weighing data such as time, date and ID number.

37

10-4 Description of the Class “Environment, Display”
Condition ( Cond )Cond 0Cond 2This parameter is for sensitive response to the fluctuation of a weight value.
Used for powder target weighing, weighing a very light sample or whenquick response weighing is required.
After setting, the balance displays FAST.
This parameter is for stable weighing with slow response. Used to prevent aweight value from drifting due to vibration or drafts.
After setting, the balance displays SLOW.
Notes
In automatic response adjustment, the response rate is selected
automatically.
With “Hold function (Hold)” set to “ON (1)”, this item is used to set
the averaging time.

Stability band width ( 5t-b )This item controls the width to regard a weight value as a stable value. When the fluctuation persecond is less than the parameter, the balance displays the stabilization indicator and outputs orstores the data. The parameter influences the “Auto print mode”

5t-b 0This parameter is for sensitive response of the stabilization indicator. Usedfor exact weighing.

5t-b 2This parameter ignores slight fluctuation of a weight value. Used to preventa weight value from drifting due to vibration or drafts.
NoteWith “Hold function (Hold)” set to “ON (1)”, this item is used to set thestabilization range.

Hold function ( Hold ) (Animal weighing mode)This function is used to weigh a moving object such as an animal.
When the weighing data is over the weighing range from zero and the display fluctuation is within thestabilization range for a fixed period of averaging time, the processing indicator illuminates and thebalance displays the average weight of the animal. When the animal is removed from the weighingpan, the display returns to zero automatically.
This function is available only when the hold function parameter is set to “1” (the animal modeindicator ANIMAL illuminates) and any weighing unit other than the counting mode is selected.
Weighing range
GX-200/300/400/600/800/1000 0.200 g or over
GX2000/3000/4000/6100
2.00 g or over
GX-6000/8000
10.0 g or overNote
The Animal Weighing Bowl Kit (GX-12) is available
as an option for all models except GX-200.

The averaging time and stabilization range are set in “Condition (Cond)” and “Stability band width (5t-b)”.
Averaging time
Stabilization range
Cond 0 2 seconds
5t-b 0 About ±6% of the weight value
Faster|Cond 1 4 seconds
5t-b 1 About ±12% of the weight value
More accurate
Cond 2 8 seconds
5t-b 2 About ±25% of the weight value38

Zero tracking ( trc )This function tracks zero point drift caused by changes in the environment and stabilizes the zero
point. When zero has difficulty stabilizing, select a greater value. When the weighing data is only a
few digits, turn the function off for accurate weighing.

trc 0
trc 1
trc 2
trc 3

The tracking function is not used. Used for weighing a very light sample.
The tracking function is used. Normal zero tracking.
The tracking function is used. Strong zero tracking.
The tracking function is used. Very strong zero tracking.

Note
Digit, when used for the GX series balance, indicates a unit of minimum weighing value.

Display refresh rate ( 5pd )Period to refresh the display. This parameter influences “Baud rate”, “Data output pause” and“Stream mode”.
NoteThis item is selected automatically in the automatic response adjustment.

Decimal point ( pnt )The decimal point format can be selected.

Auto display-ON ( p-on )When the AC adapter is connected, the display is automatically turned on without the ON:OFF key
operation, to display the weighing mode. Used when the balance is built into an automated system.
30-minute warm up is necessary for accurate weighing.

Auto display-OFF ( poff )When the AC adapter is connected and no operation is performed (inactivity state) for 10 minutes,
the display is automatically turned off and the standby indicator is illuminated.

Capacity indicator ( g5i )In the weighing mode, the indicator displays the weighing data relative to the weighing capacity inpercentage. (Zero = 0%, maximum capacity = 100%)
When the “Data memory ( data )” parameter is set to “1” (to store unit mass in the counting mode) or
to “2” (to store the weighing data), the indicator displays the information stored in memory, such as
the amount of memory data or data number.

39

10-5 Description of the Item “Data output mode”
The parameter setting of the “Data output mode ( prt )” applies to the performance when the “Datamemory ( data )” parameter is set to “2” (to store the weighing data)and when the data is transmittedusing the RS-232C interface.

Key mode
When the PRINT key is pressed with the stabilization indictor turned on, the balance outputs orstores the weighing data and the display blinks one time.
Required setting

dout

prt 0

Key mode

Auto print modes A and B
When the displayed value is stable and the conditions of “Auto print polarity”, “Auto print difference”
and reference value are met, the balance outputs or stores the weighing data.
When the PRINT key is pressed with the stabilization indictor turned on, the balance outputs orstores the data and the display blinks one time. ,Mode A: Required setting

ExampleMode B:Required setting

Example

dout
dout
dout

prt 1
ap-p
ap-b

Auto print mode A (reference = zero)
Auto print polarity
Auto print difference“For weighing each time a sample is placed and removed.”

dout

prt 2

dout
dout

ap-p
ap-b

Auto print mode B (reference =last stable value)
Auto print polarity
Auto print difference“For weighing while a sample is added.”Stream mode
The balance outputs the weighing data continuously regardless of the display condition. The display
does not blink in this mode. This mode is not available and the interval memory mode is used whenthe “Data memory ( data )” parameter is set to “2” (to store the weighing data).
Required setting

dout
dout
ba5fnc5if

prt 3
data 05pd
bp5

Example“For monitoring data on a computer”

Stream mode
Data memory function is not used.
Display refresh rate
Baud rate

CautionThe balance may not transmit the data completely at the specified refresh rate, dependingon the baud rate or data added to the weighing data such as time, date and ID number.

40

Interval memory mode
The weighing data is periodically stored in memory.
Required setting

Optional setting
Example

dout
dout
dout
dout

prt 3
data 2

Interval memory mode
Data memory function is used.
Stores weighing data.
intInterval time
5-td1, 2, or 3 Adds the time and date.

“For periodical weighing without a computer command andoutputting all of the data to a computer at one time”

10-6 Description of the Item “Data format”
5if type 0

A&D standard format

This format is used when the peripheral equipment can receive the A&D format. If an AD-8121B isused, set the printer to MODE 1 or 2.
 This format consists of fifteen characters excluding the terminator.
 A header of two characters indicates the balance condition.
 The polarity sign is placed before the data with the leading zeros. If the data is zero, the plus
sign is used.
 The unit, consisting of three characters, follows the data.
S T , +

0 0

HeaderDP (Dump print) format

0 1

Data

2 . 7

8 8

8

Unit

g CR LF

Terminator

5if type 1

This format is used when the peripheral equipment can not receive the A&D format. If an AD-8121B
is used, set the printer to MODE 3.
 This format consists of sixteen characters excluding the terminator.
 A header of two characters indicates the balance condition. No overload header is used.
 The polarity sign is placed before the data, with spaces in place of leading zeros, if the data is
not zero or overloaded.
 The unit, consisting of three characters, follows the data.

41

KF format

5if type 2

This is the Karl-Fischer moisture meter format and is used when the peripheral equipment can only
communicate using this format.
 This format consists of fourteen characters excluding the terminator.
 This format has no header characters.
 The polarity sign is placed before the data, with spaces in place of leading zeros, if the data is
not zero or overloaded.
 This format outputs the unit only for a stable value.
CR LF+
1 2 . 7 8g

Data

MT format

Terminator

Unit

5if type 3

 A header of two characters indicates the balance condition.
 The polarity sign is used only for negative data.
 The weighing data uses spaces in place of the leading zeros.
 The character length of this format changes dependent upon the unit
S

1

Header

2 . 7

Data

NU (Numerical) format

g CR LF

8

Unit Terminator

5if type 4

This format outputs only numerical data.
 This format consists of nine characters excluding the terminator.
 The polarity sign is placed before the data with the leading zeros. If the data is zero, the plus
sign is used.

CSV format

5if type 5

 Separates the data of A&D standard format and the unit by a comma (,).
 Outputs the unit even when the data is overloaded.
 When the ID number, data number, time and date are added, outputs the ID number, data
number, date, time and weighing data in this order and separates each item by a comma andtreats all the items as one group of data.

Note
To add the ID number, data number, time and date, the function settings must be changed.

4210-7 Description of the Data Format Added to the Weighing Data
Data number

dout d-no 1

This format outputs the data number just before the data is transmitted using the RS-232C interface.
 This format consists of six characters excluding the terminator.
 When CSV format (5if type 5) is selected, the period ( . ) is replaced with a comma ( , ).

Note
The data number is added only to the weighing data that is stored in memory.

Time

dout 5-td 1 or 3

 Outputs time in 24-hour format.

Date

dout 5-td 2 or 3

 The date output order can be changed in “Clock (Cl adj)”. Outputs the year in four-digit
format.

ID numberdout 5-id 1

The number to identify a specific balance.
 This format consists of seven characters excluding the terminator.

Note
When the data described above is added to the weighing data, the output is in the following
order: ID number, Data number, Date, Time and Weighing data.

43

10-8 Data Format Examples
StableA&D S T , + 0 0 0 0 1 . 2 7
g CR LF
g CR LF+ 1 . 2 7
DP W T
CR LF
KF
g
1 . 2 7+MT S
1 . 2 7
g CR LF
NU + 0 0 0 0 1 . 2 7 CR LF

Unstable

A&D U
DP U
KF MT S
NU -

S ,
S

-

0 0

1
D
0 0 1 8

1
8 3
- 1
3 .

8
1
.
8
6

3 . 6 98 3 . 6 96 9
3 . 6 99 CR LF

g CR LF
g CR LF
CR LF
CR LF

Overload
Positive error

A&D O L , + 9 9 9 9 9 9 9 E + 1 9 CR LF
CR LF
E
DP
CR LF
KF
H
MT S I + CR LF
NU + 9 9 9 9 9 9 9 9 CR LF

Overload
Negative error

A&D O L , - 9 9 9 9 9 9 9 E + 1 9 CR LF
CR LF
- E
DP
L
C
KF
L
R F
MT S I - CR LF
NU - 9 9 9 9 9 9 9 9 CR LF

C
R
L
F

Space, ASCII 20h
Carriage Return, ASCII 0Dh
Line Feed, ASCII 0Ah

44

Units

D.P.

A&D

KF

MT

g

g

p c s

P C S

%

%

%

o z

o z

o z

o z

Pound

l b

l b

l b

l b

Pound Ounce

o z

o z

o z

o z

Troy Ounce

o z t

o z t

o z t

o z t

Metric Carat

c t

c t

c t

c t

Momme

m o m

m o m

m o m

m o

Pennyweight

d w t

d w t

d w t

d w t

Grain
(HK general,
Tael Singapore)
Tael (HK, jewelry)

G N

G N

g r

G N

t l

t l

t l

s

t l

t l

t l

t l

h

t l

Tael (Taiwan)

t l

t l

t l

t

t l

Tael (China)

t l

t l

t l

c

t l

Tola (India)

t

t

t o l

t

Messghal

m e s

m e s

M S

m

Density

D S

D S

D S

D S

g

g

Counting mode

P C

P C

Precent mode%

Ounce (Avoir)

g

Multi

(Blank)Space, ASCII 20h

Note
When “Pound Ounce” is selected, the data is output with the unit of ounce (oz).

4510-9 Clock and Calendar Function
The balance is equipped with a clock and calendar function. When the “GLP output (info)”
parameter is set to “1” or “2” and the “Time/Date output (5-td)” parameter is set to “1”, “2” or “3”, thetime and date are added to the output data. Set or confirm the time and date as follows:

Operation
1 Press and hold the SAMPLE key until
the function table is displayed.

ba5fncof

2 Press the SAMPLE key several times to display
Cl adj .
3 Press the PRINT key. The balance enters the mode toconfirm or set the time and date.
Confirming the time
4 The current time is displayed with all the digits
blinking.
 When the time is correct and the date does notneed to be confirmed, press the CAL key andproceed to step 8.
 When the time is correct and the date is to be
confirmed, press the SAMPLE key and proceed tostep 6.
 When the time is not correct and is to be changed,
press the RE-ZERO key and proceed to step 5.
Setting the time (with part of the digits blinking)5 Set the time in 24-hour format using the following
keys.
SAMPLE key

RE-ZERO key
MODE key
PRINT key
CAL key

To select the digits to change
the value. The selected digits
blink.
To increase the value by one.
To decrease the value by one.
To store the new setting, display
end and go to step 6.
To cancel the new setting and
go to step 6.

46

Confirming the date
6 The current date is displayed with all the digits
blinking.
 To change the display order of year (y), month (n)and day (d), press the MODE key. The date is
output in the order as specified.
 When the date is correct and the operation is to befinished, press the CAL key and proceed to step 8.
 When the time is to be confirmed again, press the
SAMPLE key and go back to step 4.
 When the date is not correct and is to be changed,
press the RE-ZERO key and proceed to step 7.
Note
The year is expressed using a two-digit format. For
example, the year 2000 is expressed as “00”.

Setting the date (with part of the digits blinking)7 Set the date using the following keys.
SAMPLE key

To select the digits to change
the value. The selected digits
blink.

RE-ZERO key

To increase the value by one.

MODE key

To decrease the value by one.

PRINT key

To store the new setting, display
end and go to step 8.

CAL key

To cancel the new setting and
go to step 8.

Quitting the operation
8 The balance displays the next menu of the function
table. Press the CAL key to exit the clock andcalendar function and return to the weighing mode.
Notes
Do not enter invalid values such as a non-existing date when setting the time and date.
When the clock backup battery has been depleted, the balance displays rtc pf .
Under this condition, press any key and set the time and date. The dead battery only
affects the clock and calendar function. Even so, the function works normally as long as
the AC adapter is connected to the balance.

47

10-10 Comparator Function
The results of the comparison are indicated by HI OK LO on the display.
Operating conditions:  No comparison
 Comparison when the weighing data is stable or overloaded, excluding“near zero”
 Comparison when the weighing data is stable or overloaded, including“near zero”
 Continuous comparison, excluding “near zero”
 Continuous comparison, including “near zero”
 Upper limit value and lower limit value

To compare, use:

 Reference value and tolerance value
 Digital input

Input method: Weighing input
Note"Near zero" means within 10 digits of the minimum weighing value. For example, using a
GX-2000 in gram mode, near zero is within 0.10 g.
For the description of “Comparator mode (Cp fnc)”, refer to “10-3 Details of the Function Table”.

Setting example 1(Continuous comparison, excluding “near zero”, reference value and tolerance value, digital input)
Selecting a comparator mode
1 Press and hold the SAMPLE key until

ba5fnc2 Press the SAMPLE key several times to displayof the function table is displayed.
Cp fnc .

3 Press the PRINT key.
4 Press the RE-ZERO key several times to display

Cp 3 .

5 Press the SAMPLE key several times to display

Cp in .

6 Press the RE-ZERO key several times to display

Cp in 2 .

7 Press the PRINT key to store the selected mode.
Entering the reference and tolerance values
8 With Cp refdigits blinking.

displayed, press the PRINT key. The current setting is displayed with all the When the current setting is not to be changed, press the PRINT or CAL key to proceed to step 9.
 When the current setting is to be changed, press the RE-ZERO key. Change the setting
using the following keys.
SAMPLE key
RE-ZERO key
MODE key
PRINT key
CAL key

To select the digit to change the value.
To change the value of the digit selected.
To switch the polarity.
To store the new setting and go to step 9.
To cancel the new setting and go to step 9.

48

9 With Cp lnt displayed, press the PRINT key. The current setting is displayed. When thecurrent setting is to be changed, change the setting using the following keys. Enter thetolerance value in percentage to the reference value as 100%.

10

SAMPLE key

To select the digit to change the value.

RE-ZERO key

To change the value of the digit selected.

PRINT key

To store the new setting and go to step 10.

CAL key

To cancel the new setting and go to step 10.

Press the CAL key to exit the comparator function and return to the weighing mode.

Setting example 2(Comparison when the weighing data is stable or overloaded, including “near zero”, upper limit andlower limit, weighing input)
Selecting a comparator mode
1 Press and hold the SAMPLE key until

ba5fnc2 Press the SAMPLE key several times to displayof the function table is displayed.
Cp fnc .

3 Press the PRINT key.
4 Press the RE-ZERO key several times to display

Cp 2 .

5 Press the SAMPLE key several times to display

Cp in .

6 Press the RE-ZERO key several times to display

Cp in 1 .

7 Press the PRINT key to store the selected mode.
Entering the upper and lower limit values
8 WithCp Hi

displayed, press the PRINT key. The current setting is displayed with all of thedigits blinking. Press the RE-ZERO key to enter the weighing input mode.
9 Press the RE-ZERO key. The balance displays

0.00 g. Place a sample whose mass

corresponds to the upper limit value on the pan. Press the PRINT key to store the upper limit
value. Remove the sample. The balance displays
10 WithCp lo

Cp lo .

displayed, press the PRINT key. The current setting is displayed with all of thedigits blinking. Press the RE-ZERO key to enter the weighing input mode.
11

Press the RE-ZERO key. The balance displays

0.00 g. Place a sample whose mass

corresponds to the lower limit value on the pan. Press the PRINT key to store the lower limit
value. Remove the sample.
12

Press the CAL key to exit the comparator function and return to the weighing mode.

Notes
When Pound/Ounce is selected as a weighing unit, enter the values in ounces forcomparison.
In the density mode, comparison is performed to the density obtained.

49

11. ID NUMBER AND GLP REPORT The ID number is used to identify the balance when Good Laboratory Practice (GLP) is used.
 The ID number is maintained in non-volatile memory even if the AC adapter is removed.
 The GLP output format is selected at “GLP output (info)” of the function table and can be
output to a personal computer or printer using the RS-232C serial interface.
 The GLP output format includes the balance manufacturer, model, serial number, ID number,date, time and space for signature for weighing data, and the weight used and results forcalibration or calibration test data.
 The balance can output the following reports for GLP.
“Calibration report” of the calibration, using the internal mass (Calibration due to changes intemperature and one-touch calibration.)“Calibration report” of the calibration, using an external weight.
“Calibration test report” of the calibration test, using an external weight.
“Title block” and “End block” for the weighing data.
 Calibration and calibration test data can be stored in memory to output several reports at thesame time. Refer to “12. DATA MEMORY” for details.
 For details on confirming and setting the time and date, refer to “10-9 Clock and Calendar
Function”.

11-1 Setting the ID Number
1 Press and hold the SAMPLE key until

ba5fnc2 Press the SAMPLE key several times to displayof the function table is displayed.
id .

3 Press the PRINT key. Set the ID number using the following keys.
RE-ZERO key

To set the character of the digit selected. Refer to the display characterset shown below.

SAMPLE key

To select the digit to change the value.

PRINT key

To store the new ID number and display

ba5fnc .

CAL key

To cancel the new ID number and display

ba5fnc .

4 Withba5fncdisplayed, press the CAL key to return to the weighing mode.

Display character set
0 1 2 3 4 5 6 7 8 9 -

A BC D E F G H I J K L MNOPQRSTUVWXYZ

Space

50

11-2 GLP Report
Set the following parameters to output the report.
 To print the report, set the “GLP output ( info )” parameter to “1” and use MODE 3 of the
AD-8121B. For details on using the printer, refer to “17-1 Connection to the AD-8121B Printer”.
 To output the report to a personal computer using the RS-232C interface, set the “GLP output( info )” parameter to “2”.
 If the time and date are not correct, set the correct time and date in “Clock ( Cl adj )” of thefunction table.
Note
For operational details about calibration and calibration test, refer to “8. CALIBRATION”.

Calibration report using the internal mass
When the setting is “info 1”:

When the setting is “info 2”:51

Calibration report using an external weight
When the setting is “info 1”:

When the setting is “info 2”:

Calibration test report using an external weight(Calibration test does not perform calibration.)
When the setting is “info 1”:

When the setting is “info 2”:52Title block and end block
When a weight value is recorded as the GLP data, “Title block” and “End block” are inserted at the
beginning and at the end of a group of weight values, in the GLP report.

Note
To output the report to an AD-8121B , use MODE 3 of the AD-8121B.

CautionIf the data memory function is used, the “Title block” and “End block” can not be output.

Operation
1 With the weighing data displayed, press and hold the PRINT key until S5tart
The “Title block” is output.

is displayed.

2 The weighing data is output according to the parameter setting of the data output mode.
3 Press and hold the PRINT key until

recendWhen the setting is “info 1”:

is displayed. The “End block” is output.

When the setting is “info 2”:53

12. DATA MEMORY
Data memory is a function to store weighing data, calibration data and unit mass in memory. Of thedata in memory, the balance can only display the weighing data. The weighing data and calibration
data in memory are available for outputting at one time to a printer or personal computer.
One of the following data set can be stored: Weighing data (Up to 200 sets. 100 sets when the time and date are added.) Calibration and calibration test data (latest 50 sets)
 Unit mass in the counting mode (Up to 20 sets)

12-1 Notes on Using Data Memory
To use the memory function, set the “Data memory ( data )” parameter of the function table. In
addition, for weighing data, set the “Time/Date output (5-td)” parameter. For details on setting thedata memory, refer to “10. FUNCTION TABLE”.
For weighing data, the data contents to be stored and the storage capacity depend on the“Time/Date output (5-td)” parameter setting.

Releasing “Clr”
If a different type of data exists in memory when the data is stored, “Clr” appears blinking in theupper left of the display. For example, you want to store weighing data but calibration data or unit
mass data remains in memory.

Under such a condition, before storing data, delete the data in memory as follows:
1 Press and hold the PRINT key until SClr nowith “no” blinking is displayed.

2 Press the RE-ZERO key to display SClr gowith “go” blinking.

The type of data stored in memory appears on the upper left of the display as shown below:
Unit mass in the counting mode
Weighing data without time and date
Weighing data with time and date
Calibration or calibration test data

PC
-dd-t
Hi5

3 Press the PRINT key to delete all the data in memory.
4 The balance displays

end

and returns to the weighing mode.

54

12-2 Memory for Weighing Data
 The data memory function can store 200 sets of weighing data (100 set if time and date areadded). Even if the AC adapter is removed, the data is maintained in non-volatile memory.
 It is not necessary that the printer or computer be continually connected to the balance,
because the balance stores the weighing data in memory.
 The data in memory is available to be displayed on the balance for confirmation, or to output
several sets of data at one time to a printer or personal computer. In the function setting, what
data is to be added to the output data (ID number, data number, time and date) can beselected.

Storing the weighing data
Note
If “Clr” appears blinking in the upper left of the display, delete the data in memory.
1 Set the “Data memory ( data )” parameter to “2”.
2 Set the “Time/Date output (5-td)” parameter as necessary.
3 The storing operation depends on the “Data output mode ( prt )” parameter setting. Fourtypes of operating modes are available to store data.
Key mode

When the PRINT key is pressed and the displayed value isstable, the balance stores the weighing data.

Auto print modes A and B

When the displayed value is stable and the conditions of “Autoprint polarity”, “Auto print difference” and reference value aremet, the balance stores the weighing data.

Interval memory mode

Weighing data is stored at an interval specified in “Interval time(int)”. Press the PRINT key to start and stop this mode.

Caution When weighing data is being stored in memory, the data can not be output to a personal
computer using the RS-232C interface.
“fUl” indicates that memory is full or the memory capacity has been reached. More data can
not be stored unless the memory data is deleted.

 Automatic self calibration can not be used while the interval memory mode is active.

55

 The following commands can not be used during data storage.
Q
Query command for weighing data.
S

Query command for stable weighing data.

SI

Query command for weighing data.

SIR

Query command for continuous weighing data.

Setting the function table
Parameter settings for each output mode are as follows:
Item
Data output Auto print Datamemory Interval
modepolarity,
functiontime
Mode
difference
prt 0
Data 2
Key mode
Not usedNot usedprt 1
ap-a 0-2
Data 2
Auto print mode A
ap-b 0-2
prt 2
Data 2
Auto print mode B
prt 3
Data 2
int 0-8
Interval memory modeNot usedSet each item, depending on the situation, as follows:
d-no 05-td 0No
No
Data number
Time
and
date
d-no 15-td 1
Yes
Time only
5-id 05-td 2
ID number
No
Date only
5-id 15-td 3
Yes
Both
With 5-td 1, 5-td 2 or 5-td 3 selected, the amount of data to be stored is 100 sets.

Enabling the data memory function
1 Press and hold the SAMPLE key until

ba5fncof the function table is displayed.
dout

2 Press the SAMPLE key several times to display.

3 Press the PRINT key.
4 Press the SAMPLE key three times to display
5 Press the RE-ZERO key to change

data 0

data 0 .
todata 2 .

6 Press the PRINT key to save.
7 Press the CAL key to return to the weighing mode.

Recalling the memory data
Confirm that the “Data memory ( data )” parameter is set to “2”.
1 Press and hold the PRINT key until

recallis displayed.

2 Press the PRINT key to enter the memory recall mode. Recall the data in memory using the following keys
RE-ZERO key

To proceed to the next data set.

MODE key

To go back to the previous data set.

PRINT key

To transmit the current data using the RS-232C interface.

With SAMPLE held down, press the CAL key
To delete the data currently displayed.
Note: Deleting the data will not increase the number of data that can be stored.
CAL key

To exit the memory recall mode.

3 Press the CAL key to return to the weighing mode.

56

Transmitting all memory data at one time
Confirm that the “Serial interface ( 5if )” parameters are set properly. For details, refer to “10.
FUNCTION TABLE” and “17. CONNECTION TO PERIPHERAL EQUIPMENT”.
1 Press and hold the PRINT key until

reCall is displayed.

2 Press the SAMPLE key to displayout .

3 Press the PRINT key to display Sout no
5 Press the RE-ZERO key to display

with “no” blinking.

out gowith “go” blinking.

6 Press the PRINT key to transmit all data using the RS-232C interface.
7 The balance displays
weighing mode.

Clear when all data is transmitted. Press the CAL key to return to the

Deleting all memory data at one time
1 Press and hold the PRINT key until

reCall is displayed.

2 Press the SAMPLE key several times to display
3 Press the PRINT key to display SClr no

Clear .

with “no” blinking.

4 Press the RE-ZERO key to display SClr gowith “go” blinking.

5 Press the PRINT key to delete all data
6 The balance displays

end , thenreCall when all data is deleted.

7 Press the CAL key to return to the weighing mode.

57

12-3 Memory for Calibration and Calibration Test Data Calibration data (when and how it is performed) and calibration test data can be stored inmemory.
 All the data in memory is available to be output at one time to a printer or personal computer.
Up to 50 data sets of the latest calibration or calibration test can be stored. When the memory
capacity has been reached, “fUl” illuminates.

Storing the calibration and calibration test data
Note
If “Clr” appears blinking in the upper left of the display, delete the data in memory.
Store the calibration and calibration test data as follows:
1 Set the “Data memory ( data )” parameter to “3”.
2 Set the “GLP output (info)” parameter to “1” or “2”.
3 With the settings above, each time calibration or calibration test is performed, the data isstored automatically.

Transmitting the memory data
Confirm that the “Serial interface ( 5if )” parameters are set properly. For details, refer to “10.
FUNCTION TABLE” and “17. CONNECTION TO PERIPHERAL EQUIPMENT” and also confirm thatthe “Data memory ( data )” parameter is set to “3”.
1 Press and hold the PRINT key until out is displayed.
2 Press the PRINT key to display Sout no3 Press the RE-ZERO key to display

with “no” blinking.

out gowith “go” blinking.

4 Press the PRINT key to transmit all memory data using the RS-232C interface.
5 The balance displays Clear
to the weighing mode.

when all memory data is output. Press the CAL key to return

Deleting the memory data
1 Press and hold the PRINT key until out is displayed.
2 Press the SAMPLE key to display

Clear .

3 Press the PRINT key to display SClr nowith “no” blinking.

4 Press the RE-ZERO key to display SClr gowith “go” blinking.

5 Press the PRINT key to delete all data
6 The balance displays out
to the weighing mode.

when all the data has been deleted. Press the CAL key to return5812-4 Memory for Unit Mass in the Counting Mode The data memory function can store 20 sets of unit mass for the counting mode. Even if theAC adapter is removed, the data is maintained in non-volatile memory. Among the 20 sets,“p01” is the memory function for the standard counting mode.
 The unit mass in memory can be recalled and used for weighing.
 The unit mass in memory can be recalled and changed.

Recalling the unit mass
1 Set the “Data memory ( data )” parameter to “1”.
2 Press the MODE key to select PC (counting mode).
Notes
If the counting mode can not be selected, refer to “5. WEIGHING UNITS”.
If “Clr” appears blinking in the upper left of the display, delete the data in memory.
3 Press and hold the PRINT key until the balance enters
the sample unit mass selection mode as shown below.

4 Select the unit mass to be used using the following keys.
RE-ZERO key
MODE key
PRINT key
CAL key

To increase the unit mass number by one.
To decrease the unit mass by one.
To select the unit mass number to be used.
To cancel the operation and go to step 5.

5 To re-store the unit mass or perform Automatic Counting Accuracy Improvement (ACAI) on
the stored unit mass, follow the procedure described in “6-2 Counting Mode (PC)”.
Note
ACAI can not be performed on the recalled unit mass.

5913. UNDERHOOKThe underhook can be used for weighing large samples, magnetic materials or for measuring density.
The built-in underhook is revealed by removing the plastic cap on the bottom of the balance.
Use the underhook as shown below.

Caution
Do not apply excessive force to the underhook.
When not in use, attach the plastic cap to prevent dust from getting into the balance.

60

14. PROGRAMMABLE-UNIT
This is a programmable unit conversion function. It multiplies the weighing data in grams by anarbitrary coefficient set in the function table and displays the result.
The coefficient must be within the range between the minimum and maximum shown below. If thecoefficient set is beyond the range, an error is displayed and the balance returns to the coefficientsetting mode, prompting to enter an appropriate value. A coefficient of 1 was set at the factory.
Model
GX-200/300/400/600/800/1000
GX-2000/3000/4000/6100
GX-6000/8000

Minimum coefficient
0.000001

Maximum coefficient
1000
100
10

Operation
1 Press and hold the SAMPLE key until

ba5fnc2 Press the SAMPLE key several times to displayof the function table is displayed.
mlt .

3 Press the PRINT key. The balance enters the mode to confirm or set the coefficient.
Confirming the coefficient
4 The current coefficient is displayed with the first digit blinking.
 When it is not to be changed, press the CAL key and proceed to step 6.
 When it is to be changed, press the RE-ZERO key
and proceed to step 5.
Setting the coefficient
5 Set the coefficient using the following keys.
SAMPLE key
RE-ZERO key
MODE key

PRINT key
CAL key

To select a digit to change thevalue. The selected digit blinks.
To change the value.
To change the decimal point
position.
Each time the switch is pressed,
the decimal point positionchanges as follows:

To store the new setting, display
end and go to step 6.
To cancel the new setting and
go to step 6.

Quitting the operation
6 The balance displays Unit . Press the CAL key to exit the programmable-unit function andreturn to the weighing mode.
Using the function
Press the MODE key to select the programmable-unit (no display on the unit section). Perform
weighing as described in “6-1 Basic Operation (Gram Mode)”. After weighing, the balancedisplays the result (weighing data in grams x coefficient).

61

15. DENSITY MEASUREMENTThe GX series balance is equipped with a density mode. It calculates the density of a solid using theweight of a sample in air and the weight in liquid.
 The density mode was not selected for use when the balance was shipped from the factory. To
use the mode, change the function table and activate the density mode.
 Two ways to set the density of a liquid are available:
by entering the water temperature or by entering the density directly.
The density determination kit (GX-13) is available as an option for GX-200/300/400/600/800/1000.

Formula to obtain the density
The density can be obtained by the following formula.
Where

A:
A:
B:
B:

Density of a sample
Weight value of a sample in air
Weight value of a sample in liquid
Density of a liquid

Changing the function table(1) Selecting the density mode
The density mode is available as one of the weighing units. To use the mode, select it in thefunction table. For details, refer to “5-2 Storing Units”.
(2) Selecting a way to set the density of a liquid
Select the liquid density input method from the function table below. The function table isavailable only when the density mode is selected.
Class
d5 fncDensity function

Item
ld in
Liquid density input

Parameter
Description0
Water temperature
1
Liquid density
0 = Factory setting

Setting the density of a liquid
1. Press the MODE key as necessary to select the density mode. When the processing indicator
blinks with the unit “g” displayed, it indicates that the density mode is selected.
2. In the density mode, press and hold the MODE key to enter the mode to set the liquid density.
Note
In the normal weighing mode, the same procedure will activate the automatic response
adjustment. This function is not available in the density mode.

Entering the water temperature ( ldin 0 )In the density mode, press and hold the MODE key until the water temperature currently set (unit:C,
factory setting : 25C) is displayed. Use the following keys to change the value.
RE-ZERO key

To increase the temperature by one degree. (0-99)

MODE key

To decrease the temperature by one degree. (0-99)

PRINT key

To store the change, display

CAL key

To cancel the change and return to the density mode.

62

end

and return to the density mode.

The relation between the water temperature and density is shown below.

Entering the density directly ( ldin 1 )In the density mode, press and hold the MODE key until the density currently set(unit : g / cm3,
3
factory setting : 1.000g / cm ) is displayed. Use the following keys to change the value.

RE-ZERO key

To set the value of the digit selected.

SAMPLE key

To select the digit to change the value.

PRINT key

To store the change, display

CAL key

To cancel the change and return to the density mode.

end

and return to the density mode.

Note
The range to set the density is 0.0000 to 1.9999 g / cm3

Measuring the density
In the density measurement, the balance displays the weight of a sample in air, the weight in liquid
and then the density.
 Measuring the weight of a sample in air.

The processing indicator blinks with the unit “g” displayed.
 Measuring the weight of a sample in liquid.

The processing indicator illuminates with the unit “g” displayed.
 Displaying the density.

The processing indicator illuminates with “DS” displayed.
To cycle through the above three, press the SAMPLE key.
Note
The SAMPLE key can not be used to change the minimum weighing value. The density isdisplayed with three decimal places.

63

Measuring procedure
1 Confirm that the balance is in the mode to measure theweight of the sample in air. (“g” displayed and processing
indicator blinking)2 Confirm that the balance indicates zero. If it does notindicate zero, press the RE-ZERO to reset the displayed
value to zero.
3 Place the sample on the upper pan (in air). When thevalue displayed on the balance becomes stable, press
the SAMPLE key to confirm the value (the weight of thesample in air). The balance enters the mode to measure
the weight of the sample in liquid (“g” displayed andprocessing indicator illuminating).

"" blinks.

Note
If a negative value or E (error) is displayed, the SAMPLE
key is disabled.
4 Remove the sample from the upper pan and place it on
the lower pan (in liquid). When the value displayed on the" "illuminates.

balance becomes stable, press the SAMPLE key toconfirm the value (the weight of the sample in liquid). Thebalance enters the mode to display the density (“g”disappears).

Density mode
" " illuminates.

Note
If E (error) is displayed, the SAMPLE key is disabled.
5 To output or store the density, press the PRINT key. The
density output unit is “DS”. To measure the density of
another sample, press the SAMPLE key to return to themode to measure the weight in air and repeat theprocedure described above.
Note

If the liquid temperature or the type of liquid is changed during measurement, reset the valueof the liquid density as necessary. For details, refer to “Setting the density of a liquid”.

6416. RS-232C SERIAL INTERFACE / EXTERNAL INPUT
RS-232C
The balance is a DCE device. Connect the balance to a personal computer (DTE), using a straight
through cable or a modem cable.
Transmission system
Transmission form
Data format:::

EIA RS-232C
Asynchronous, bi-directional, half duplex
Baud rate: 600, 1200, 2400, 4800, 9600 bps
Data bits: 7 or 8 bits
Parity: Even, Odd (Data bits 7 bits)
None(Data bits 8 bits)
Stop bit: 1 bitCode: ASCII

Pin connections
Pin No.
1
2
3
4
5
6
7
18
19
8 – 25 (Excluding 18 and19)

Signal name Direction Description
FG
Frame ground
RXD
Input
Receive data
TXD
Output Transmit data
RTS
Input
Ready to send
CTS
Output Clear to send
DSR
Output Data set readySG
Signal ground
PRINT
Input
Same as the PRINT key
RE-ZERO
Input
Same as the RE-ZERO key
Not connected

Note
The signal names for the RS-232C are the same as those for the DTE side except TXD and
RXD.

Circuits

65

External input
Pin 18 and pin 19 perform the same function
as pressing the PRINT and RE-ZERO keys
respectively by connecting each pin to pin 7
for at least 100 m seconds.

Use of example

The
external
input(AX-HDB-25P/CTF) and the(AX-SW128) are sold separately.

66

connector
foot switch

17. CONNECTION TO PERIPHERAL EQUIPMENT
17-1 Connection to the AD-8121B PrinterSet the following parameters to use the AD-8121B printer.
Function setting
dout prt 0-3
dout ap-p 0-2
dout ap-b 0-2
dout pU5e 0,1
5if bp5 2
5if btpr 0
5if Crlf 0
5if Ct5 0

Factory setting
Factory setting
Factory setting
Factory setting

Description
Selects a print mode.
Selects the polarity for the auto print mode.
Selects the auto print difference.
Selects data output pause.
2400 bps
7 bits, Even parity check
CR, LFCTS and RTS control, not used

When “MODE 1” or “MODE 2” of the AD-8121B printer is used
dout 5-td 0
Factory setting
Not to output the time and date.
dout 5-id 0
Factory setting
Not to output the ID number.
dout at-f 0
Factory setting
Not to use auto feed.
5if type 0
Factory setting
A&D standard format
When “MODE 3” of the AD-8121B printer is used.
dout 5-td 0-3
Outputs the time and date as necessary.
dout 5-id 0,1
Outputs the ID number as necessary.
dout at-f 0,1
Uses auto feed as necessary.
5if type 1
DP format
When data is transmitted continuously.
When all memory data is transmitted at one time.
dout pU5e 1
Uses pause.
Note
The printer performs as follows, depending on the data memory setting.
Settingdata 0
data 2
data 3What is printed
The weighing data
The weighing data stored in memory
The calibration or calibration test data stored in memory

Refer to “11. ID NUMBER AND GLP REPORT” for a print sample.

17-2 Connection to a Computer
The GX series balance is of the DCE type (Data Communication Equipment), which can beconnected to a personal computer using the RS-232C interface.
Before connection, read the personal computer manual thoroughly.
Use a standard DCE cable for connection (cable type: straight-through).

67

17-3 Using Windows Communication Tools (WinCT)
When Windows is used as an operating system in a personal computer, the WinCT can be used totransmit the weighing data to the personal computer.
The WinCT has two communication methods: “RsCom” and “RsKey”. For details on WinCT, refer tothe WinCT instruction manual.
The current version of the WinCT can be downloaded from the A&D website.

RsCom Can transmit commands to control the balance.
 Can make a bi-directional communication between the balance and a personal computer using
the RS-232C interface.
 Can display or store the data using a text file format. Can also print the data using a printerconnected to the personal computer.
 When several ports of a personal computer have balances connected, the personal computercan communicate with each balance simultaneously.
 Can share a personal computer with other application software.
 Can receive the balance GLP report.

RsKey Can transmit the weighing data output from the balance directly to other application software
such as Microsoft Excel.
 Can be used with most application software.
 Can receive the balance GLP report.
Note
Windows and Excel are the registered trademarks of the Microsoft Corporation.

Using the WinCT, the balance can do the following:
1 Analyzing the weighing data and the statistics input by “RsKey”
The weighing data can be input directly into an Excel worksheet. Then, Excel can analyze thedata to obtain total, average, standard deviation, maximum and minimum value, and display
them in a graph.
2 Controlling the balance using commands from a personal computer
By using “RsCom”, the personal computer sends commands such as “re-zero” or “sendweighing data” to the balance and controls the balance.
3 Printing the balance GLP report using your printerThe balance GLP report can be printed using a printer connected to the personal computer.
4 Receiving weighing data at a certain interval
The weighing data can be received at a certain interval and data characteristic with elapsed
time can be obtained.

68

5 Using the GX series balance memory function
The weighing data, instead of outputting it immediately to an external device, can be stored in
the balance’s memory. Later, all of the weighing data stored can be output to a personal
computer at one time.
6 Using a personal computer as an external indicator
With the “RsKey” test mode function, a personal computer can be used as an external weightindicator for the balance. (To do this, set the balance data output mode to stream mode.)6918. COMMANDS
18-1 Command List
Commands to query weighing data
C
Q
S
SI
SIR
E
SCP

Cancels the S or SIR command.
Requests the weighing data immediately.
Requests the weighing data when stabilized.
Requests the weighing data immediately.
Requests the weighing data continuously.
Requests the weighing data when stabilized.

Note: The “Q” and “SI” commands, the “S” and “ESCP” commands behave the same.

Commands to control the balance
CAL
MCL
MD:nnnOFF
ON
P
PT:. 

g

?PT
PRT
R
SMP
U
T
TR

Z
E

SCT

Same as the CAL key.
Deletes all data in memory.
Deletes weighing data with the data number nnn.
Turns the display off.
Turns the display on.
Same as the ON:OFF key
Sets the tare value.
The unit added is the unit that is output in the A&D standard format. For
the counting or percent mode, gram is used. Set the tare value so thatthe total value of the sample and the tare does not exceed the weighing
capacity. Negative values can not be used.
Requests the tare value.
Outputs the tare value set by the TR or PT: command.
Same as the PRINT key
Same as the RE-ZERO key
Same as the SAMPLE key.
Same as the MODE key
Same as the RE-ZERO key
Tares the balance (Cancels the container’s weight.)
Available only when the load on the weighing pan is greater than thezero point. The zero point is set by the R, T or Z command, by pressing
the RE-ZERO key, or using the external input.
Same as the RE-ZERO key
Same as the RE-ZERO key

Note: The “R”, “T”, “Z” and “ESCT” commands behave the same.

Commands to control the memory function?MA?MQnnn?MX
MCL
MD:nnn
UN:mm?UN
UW:. 
?UW
?ID
?SN
?TN

g

Outputs all data in memory.
Outputs weighing data with the data number nnn.
Outputs the number of weighing data in memory.
Deletes all data in memory.
Deletes weighing data with the data number nnn.
Changes the unit mass stored in memory with the number of mm (01-20).
Outputs the unit mass number of the selected unit mass.
Sets the unit mass value. e.g.,UW:+0.123
g (to set the unit mass to
0.123 g: represents a space.)
Outputs the unit mass value of the selected unit mass number.
Requests the ID number.
Requests the serial number.
Requests the model name.

70Commands to control the comparator function
HI:. g

LO:. 

g

?HI
?LO

Sets the upper limit value. e.g.,HI:+2.34
value to 2.34 g: represents a space.)
Sets the lower limit value. e.g.,LO:+1.23
value to 1.23 g: represents a space.)
Outputs the upper limit value.
Outputs the lower limit value.

g (to set the upper limitg (to set the lower limit

Notes“nnn” and “mm” indicate, respectively, three-digit and two-digit numerical values.
E
SC : 1Bh in ASCII code
Before transmitting a command, add the terminator (<CR><LF> or <CR>), that is specified in
the “Terminator (Crlf)” parameter of “Serial interface (5if)” in the function table, to thecommand.
To use a command to control the comparator function, set the “Input method (Cpin)” parameter to “0” or“1”.

18-2 Acknowledge Code and Error Codes
When the “Serial interface function ( 5if )” parameter is set to “erCd 1”, the balance outputs <AK>code or error code to each command as follows:<AK> (06h)Acknowledge in ASCII code.

 When the balance receives a command to request data and can not process it, the balancetransmits an error code (EC, Exx).
When the balance receives a command to request data and can process it, the balance
outputs the data.
 When the balance receives a command to control the balance and can not process it, thebalance transmits an error code (EC, Exx).
When the balance receives a command to control the balance and can process it, the balancetransmits the acknowledge code.
 When a communication error has occurred due to external noise, or a parity error has
occurred due to transmission error, the balance transmits an error code. In this case, send thecommand again.
Among commands to control the balance, the following transmit the acknowledge code bothwhen the balance receives the command and when the balance has accomplished thecommand. If the command can not be processed properly, the balance transmits an error code
(EC, Exx). This error can be released using the CAL command.
CAL command (Calibration command)

ON command (Display ON command)

P command (Display ON/OFF command)

R command (RE-ZERO command)

TR command (Tare command)71

18-3 Command Examples
ON command

Personal computer

Time

BalanceStandby mode

ON command
O N CR LF
AK CR LF

All segments

AK CR LF

Command received
All segments are displayed

Command completed
Zero display

R command

Personal computer

Time

Balance
Weighing mode

R command
R CR LF
AK CR LF

Command received
In process

AK CR LF

Command completed
Zero display

72

CAL command

Personal computer

Time

BalanceZero display

CAL command
C A L CR LF
AK CR LF

Command received

AK CR LF

Command completed
Zero display

Error code

Personal computer

Time

Balance
Weighing mode (unstable)

R command
R CR LF
AK CR LF

Command received
In process
When the R command can not be
achieved due to unstable weighing:E C ,E 1 1 CR LF

Error code

CAL command
When the CAL command isreceived, the balance returns to
the weighing modeC A L CR LF

AK CR LF

Command completed
Weighing mode73

Weighing with a tare
Personal computer

Time

Balance

R command

Sets the display to zero

R CR LF
AK CR LF

Command received
In process

AK CR LF

Command completed
Zero display

Place a container

TR command
Tares

T R CR LF
AK CR LF

Command received
In process

AK CR LF

Command completed
Zero display

S command
R CR LF

ＳＴ，＋００１００．００?PT commandｇ(Net value)? P T CR LF

ＰＴ，＋００１２６．８７(Tare value)74ｇSetting a negative target value and filling with a sample until the display becomeszero
Personal computer

Time

Balance
Place a container
Before commandexecution

R command
R CR LF
AK CR LF

Command received
In process

AK CR LF

Zero display

PT: command to set a target weight of 100 g
P T :1 0 0 .

0 0

Command completed

g CR LF
AK CR LF

Command received
Target weight display

Fill with sample until thedisplay becomes zero75

18-4 Control Using CTS and RTS
Depending on the “Ct5” parameter of “Serial interface ( 5if )”, the balance performs as follows:

Ct5 0
Regardless of whether the balance can receive a command or not, the balance keeps the CTS line
HI. The balance outputs data regardless of condition of the RTS line.

Ct5 1
The CTS line is kept Hi normally. When the balance can not receive the next command (e.g. while
the balance is processing last command), the balance sets the CTS line to Lo. The balance confirms
the level of the RTS line before outputting a set of data. If the RTS level is Hi, the balance outputs
data. If the RTS level is Lo, data is not output (The data is canceled).

18-5 Settings Related to RS-232C
Concerning the RS-232C, the balance has two functions: “Data output ( dout )” and “Serial interface( 5if )”. Set each function as necessary.

7619. MAINTENANCE
 Do not use organic solvents to clean the balance. Clean the balance with a lint free cloth thatis moistened with warm water and a mild detergent.
 The mass of the internal mass may change due to corrosion or other damage caused by theoperating environment, or due to aging. Check the internal mass using an external weight
periodically.
 Do not disassemble the balance. Contact the local A&D dealer if the balance needs service orrepair.
 Use the original packing material for transportation.

20. TROUBLESHOOTING
20-1 Checking the Balance Performance and Environment
The balance is a precision instrument. When the operating environment or the operating method isinadequate, correct weighing can not be performed. Place a sample on the pan and remove it, andrepeat this several times. If the balance seems to have a problem with repeatability or to perform
improperly, check as described below. If improper performance persists after checking, contact the
local A&D dealer for repair.

Checking that the balance performs properly Check the balance performance using the self-check function as described in “7-1 Automatic
Response Adjustment / Self Check Function”.
An error display appears when a malfunction is found.
 Check the balance repeatability using an external weight. Be sure to place the weight in thecenter of the weighing pan.
 Check the balance repeatability, linearity and calibrated value using external weights with aknown value.

Checking that the operating environment or weighing method is proper
Operating environment
 Is the weighing table solid enough (especially for GX-200/300/400/600/800/1000, the balancewith a minimum weighing value of 0.001 g)?
 Is the balance level? Refer to “3-1 Before Use”.
 Is
the
operatingenvironment
free
from
vibration
andGX-200/300/400/600/800/1000, has the breeze break been installed?

drafts?

For

 Is there a strong electrical or magnetic noise source such as a motor near the balance?

77

the

Weighing method Does the weighing pan touch the breeze ring or anything? Is the weighing pan installed
correctly?
 Is the RE-ZERO key pressed before placing a sample on the weighing pan?
 Is the sample placed in the center of the weighing pan?
 Has the balance been calibrated using the internal mass (one-touch calibration)?
 Has the balance been warmed up for 30 minutes before weighing?
Sample and container
 Has the sample absorbed or lost moisture due to the ambient conditions such as temperatureand humidity?
 Has the temperature of the container been allowed to equalize to the ambient temperature?
Refer to “3-2 During Use”.
 Is the sample charged with static electricity? Refer to “3-2 During Use”.
The GX-200/300/400/600/800/1000 is prone to be charged with static electricity when therelative humidity is low.
 Is the sample of magnetic material such as iron? Caution is required for weighing magnetic
materials. Refer to “3-2 During Use”.

20-2 Error Codes
Display

Error code
EC, E11

Description
Stability error
The balance can not stabilize due to an environmental
problem. Prevent vibration, drafts, temperaturechanges, static electricity and magnetic fields.
Refer to “3. PRECAUTIONS” for details on theoperatingenvironment
and“7.
RESPONSE
ADJUSTMENT” about adapting the balance to theenvironment.
To return to the weighing mode, press the CAL key.
Out of range error
The value entered is beyond the settable range.
Re-enter the value.

EC, E16

Internal mass error
Applying the internal mass does not yield a change inthe weighing value as specified.
Confirm that there is nothing on the pan and performthe weighing operation from the beginning again.

EC, E17

Internal mass error
The internal mass application mechanism does not
function properly.
Perform the weighing operation from the beginningagain.

78

Display

Error code
EC, E20

Description
Calibration weight error
The calibration weight is too heavy. Confirm thecalibration weight value.
Press the CAL key to return to the weighing mode.

EC, E21

Calibration weight error
The calibration weight is too light. Confirm thecalibration weight value.
Press the CAL key to return to the weighing mode.
Overload error
A sample beyond the balance weighing capacity has
been placed on the pan.
Remove the sample from the pan.
Weighing pan Error
The weight value is too light.
Confirm that the weighing pan is properly installed andcalibrate the balance.
Sample mass error
The balance can not store the sample for the counting
mode or for the percent mode because it is too light.
Use a larger sample.
Unit mass error
The sample unit mass for the counting mode is toolight. Storing and using it for counting will cause acounting error.
Add samples to reach the specified number and press
the PRINT key.
Pressing the PRINT key without adding samples will
shift the balance to the counting mode. But, for
accurate counting, be sure to add samples.
Automatic response adjustment zero error
The automatic response adjustment can not be
performed because there is something on the pan.
Clear the pan. Press the CAL key to return to theweighing mode.
Automatic response adjustment unstable error(CHECK NG)

The automatic response adjustment can not be
performed because the weight value is unstable.
Check the ambient conditions such as breeze,vibration and magnetic fields, also check the weighing
pan. Press the CAL key to return to the weighing mode.
Internal error(CHECK NO)

Indicates an internal error as the result of self-check
function.
Repair is required. Contact the local A&D dealer.

79

Display

Error code

Description
Clock battery error
The clock backup battery has been depleted.
Press any key and set the time and date. The clock andcalendar function works normally as long as the AC
adapter is connected to the balance. If this error appears
frequently, contact the local A&D dealer.
Memory full

(Blinking)

The amount of weighing data in memory has reachedthe maximum capacity.
Delete data in memory to store new data. For details,
refer to “12. DATA MEMORY”.
Memory full(Illuminated)

The amount of calibration or calibration test data inmemory has reached the maximum capacity (50 sets).
The data in memory will be deleted automatically tostore new data. For details, refer to “12. DATAMEMORY”.
Memory type error
Type of memory set in the function table and type ofdata stored are different.
For details, refer to “12. DATA MEMORY”.
EC, E00

Communications error
A protocol error occurred in communications.
Confirm the format, baud rate and parity.

EC, E01

Undefined command error
An undefined command was received.
Confirm the command.

EC, E02

Not readyA received command can not be processed.
e.g. The balance received a Q command, but not in theweighing mode.
e.g. The balance received a Q command while
processing a RE-ZERO command.
Adjust the delay time to transmit a command.

EC, E03

Timeout error
If the timeout parameter is set to “t-Up1”, the balance
did not receive the next character of a command within
the time limit of one second.
Confirm the communication.

EC, E04

Excess characters error
The balance received excessive characters in acommand.
Confirm the command.

80

Display

Error code
EC, E06

Description
Format error
A command includes incorrect data.
e.g. The data is numerically incorrect.
Confirm the command.

EC, E07

Parameter setting error
The received data exceeds the range that the balance
can accept.
Confirm the parameter range of the command.

Other errors

If the errors described above can not be released orother errors are displayed, contact the local A&D dealer.

Other symbol
When this indicator blinks, automatic self calibration isrequired. The indicator blinks when the balance detects
changes in ambient temperature. If the balance is not
used for several minutes with this indicator blinking, thebalance performs automatic self calibration. The blinking
period depends on the operating environment.

20-3 Asking For Repair
If the balance needs service or repair, contact the local A&D dealer.
The balance is a precision instrument. Use much care when handling the balance and observe
the following when transporting the balance.
 Use the original packing material.
 Remove the weighing pan from the main unit.

8121. SPECIFICATIONS

Weighing capacity
Maximum display

GX-200

GX-300

GX-400GX-600GX-800

GX-1000

210 g

310 g

410 g

610 g

810 g

1100 g210.084 g 310.084 g 410.084 g 610.084 g 810.084 g 1100.084 g

Minimum weighing value (1 digit)

0.001 gRepeatability (Standard deviation)

0.001 g0.002 g

Linearity
Stabilization time (typical at FAST)

0.003 gApprox. 1 second

Sensitivity drift(10°C-30°C/50F-86F )Approx. 1.5 seconds±2 ppm/°C (When automatic self calibration is not used)0.010 g
The value above is to the weighing capacity.
5°C to 40°C (41°F to 104°F)
85%RH or less (No condensation)

Accuracy right after calibration using
the internal mass. See notes below
Operating environment
Display refresh rate

5 times/second or 10 times/second

Counting
mode

Minimum unit mass

0.001 gNumber of samples

10, 25, 50 or 100 pieces

Percent
mode

Minimum 100% reference mass

Minimum 100% display

External calibration weight

0.100 g0.001 g0.01%, 0.1%, 1% (Depends on the reference mass stored.)
200 g
100 g

300 g
200 g
100 g

400 g
300 g
200 g

600 g
500 g
400 g
300 g
200 g

Weighing pan

128 x 128 mm

Net weight

Approx. 4.6 kg

External dimensions
AC adapter
Power consumption

800 g
700 g
600 g
500 g
400 g
300 g
200 g

1000 g
900 g
800 g
700 g
600 g
500 g
400 g
300 g
200 g

210 (W) x 317 (D) x 88 (H) mm
Confirm that the adapter type is correct for the local voltage and power
receptacle type
Approx. 11VA (supplied to the AC adapter)

Interface

RS-232C

Notes
Accuracy right after calibration using the internal mass in good ambient conditions (within
the temperature range of 10C to 30C (50F to 86F) with no abrupt changes in temperatureor humidity, no drafts, no effect by magnetic fields or static electricity).
The internal mass has a mass of approximately 500 grams.
Check the internal mass periodically as described in “19. MAINTENANCE”.

82

GX-2000 GX-3000 GX-4000 GX-6100 GX-6000 GX-8000
Weighing capacity

2100 g

3100 g4100 g6100 g6100 g8100 gMaximum display

2100.84 g 3100.84 g 4100.84 g 6100.84 g

6108.4 g

8108.4 g

Minimum weighing value (1 digit)

0.01 g

0.1 g

Repeatability (Standard deviation)

0.01 g0.1 g

0.02 g0.03 g0.1 gApprox. 1 second

Approx.
1.5 sApprox. 1 second

Linearity
Stabilization time (typical at FAST)
Sensitivity drift(10°C-30°C/50F-86F )Accuracy right after calibration using
the internal mass. See notes below(When automatic self calibration is not used)0.10 gOperating environment

0.15 g0.5 g
The value above is to the weighing capacity.
5°C to 40°C (41°F to 104°F)
85%RH or less (No condensation)

Display refresh rate
Counting
mode

Minimum unit mass

Percent
mode

Minimum 100% reference mass

5 times/second or 10 times/second
0.01 gExternal calibration weight

0.1 g

10, 25, 50 or 100 pieces

Number of samples

Minimum 100% display±5 ppm/°C±2 ppm/°C1.00 g10.0 g0.01%, 0.1%, 1% (Depends on the reference mass stored.)2000 g1000 g3000 g2000 g1000 g4000 g3000 g2000 g4000 g3000 g2000 gWeighing pan

165 x 165 mm

Net weight

Approx. 5.1 kg

External dimensions
AC adapter
Power consumption

6000 g5000 g4000 g3000 g2000 g8000 g7000 g6000 g5000 g4000 g3000 g2000 g210 (W) x 317 (D) x 88 (H) mm
Confirm that the adapter type is correct for the local voltage and power
receptacle type
Approx. 11VA (supplied to the AC adapter)

Interface

RS-232C

Notes
Accuracy right after calibration using the internal mass in good ambient conditions (within
the temperature range of 10C to 30C (50F to 86F) with no abrupt changes in temperatureor humidity, no drafts, no effect by magnetic fields or static electricity).
The internal mass has a mass of approximately 500 grams.
Check the internal mass periodically as described in “19. MAINTENANCE”.

8322. OPTIONSGlass Breeze Break(GX-10)For GX-200/300/400/600
800/1000Glass Breeze Break(GX-11)For GX-2000/3000/4000/
6100/6000/8000

Animal Weighing Bowl Kit Density Determination(GX-12)
Kit (GX-13)
For all models except GX-200
Only for GX-200/300/400/600
The mass of the Animal Weighing
800/1000Bowl Kit is approx. 200g.

GX-02 USB interface (Applicable OS is Windows 98 OSR2 or later.)
To be installed in place of the RS-232C interface.
 May be used to transmit the balance weighing data to a personal computer.
 The balance weighing data can be transmitted to applications such as Excel, Word and memo
pad for Windows automatically.
 Driver installation is not necessary.
 To perform bi-directional communications using WinCT, to output the statistical data or GLP toa personal computer by using the personal computer USB interface, use the AX-USB-25P
USB converter.

AD-1682 Rechargeable battery
 Allows use of the balance in a place where AC power is not available.

AD-8121B Printer Compact dot-matrix printer Statistical function, clock and calendar function, interval
print function, graphic print function, dump print mode
 5 x 7 dots, 16 characters per line Print paper (AX-PP143, 45 (W) x 50 (L) mm , ø65 mm)
 AC adapter or alkaline battery.

AD-8526 LAN converter This option can be used to connect the RS-232C
interface of the balance to the Ethernet (LAN) port of acomputer. This allows management of the balance
weighing data with a computer connected to a network.

84AD-8920 Remote display
 Connected to the GX series using the RS-232C interface to display the weighing data awayfrom the balance.

AD-8922 Remote controller Connected to the GX series using the RS-232C interface to display the weighing data and toremotely control the balance.

AX-SW128 Foot switch
 Used to externally transmit a RE-ZERO or PRINT signal to the balance.

AX-USB-25P-EX USB converter Adds a COM port to a PC.
 Enables bi-directional communication between the PC and the balance when a USB driver isinstalled.
 Can use serial communication software such as WinCT on a PC without COM ports.
 An RS-232C cable is provided to connect the USB converter to the balance.
RS-232C
on the GX seriesbalance

USB serial
converter

RS-232C cable provided(D-sub 25-pin)

85

To USB port
on a PC

AD-1683 DC static eliminator Used to minimize weighing errors due to static electricity on the material.
AD-1684 Electrostatic field meter This option measures the amount of the static charge on the sample, tare or peripheral
equipment and displays the result.
If those are found to be charged, discharge them using the AD-1683 DC static eliminator.

AD-1689 Tweezers for calibration weight This option is used when calibrating the balance using an external weight.

Options installed at the factory before shipment:
GX-04 Comparator output with a buzzer / RS-232C / Current loop output
 Used to compare weighing data and output the results.

GX-06 Analog output / Current loop output
 Used to output the weighing data as an analog voltage.

8623. EXTERNAL DIMENSIONS
GX-200 / 300 / 400 / 600 / 800 / 1000

GX-2000 / 3000 / 4000 / 6100 / 6000 / 8000

87

24. TERMS/INDEX
Terms
Stable value

The weight data when the stabilization indicator appears.

Environment

Ambient conditions such as vibration, drafts, temperature, static electricity andmagnetic fields which affect the weighing operation.

Store

To save the weighing data, unit mass or calibration data using the data memory
function.

Calibration

Adjustment of the balance so that it can weigh accurately.

OutputTo output the weighing data using the RS-232C interface.

Zero point

A weighing reference point or the zero display. Usually refers to the value
displayed when nothing is on the weighing pan.

Data number

Numbers assigned sequentially when weighing data or unit weight is stored.

Digit

Unit of digital resolution. Used for the balance, a unit of minimum weighing value.

Tare

To cancel the weight of a container which is not included in the weighing data.

Mode

Balance operational function.

Re-zeroTo set the display to zero.

GLP

Good Laboratory Practice.

Repeatability

Variation in measured values obtained when the same weight is placed andremoved repetitively. Usually expressed as a standard deviation.
e.g. Standard deviation=1 digit: This means that measured values fall within 1
digit in the frequency of about 68%.

Stabilization time Time required after a sample being placed, until the stabilization indicatorilluminates and the weighing data is displayed.
Sensitivity drift

An affect that a change in temperature causes to the weighing data. Expressedas temperature coefficient.
e.g. Temperature coefficient = 2 ppm/C : If a load is 500 g and the temperaturechanges by 10C, the value displayed changes by the following value.
0.0002%/C x 10C x 500 g = 10 mg

88

Index-C-

Keys and symbols

Calibration..............................................24, 25
Calibration test .......................................24, 29
Capacity indicator .............................. 3, 11, 39
Comparator function ....................................48
CSV format ..................................................42

CAL key ...................................... 11, 15
MODE key ............................ 11, 12, 15
ON/OFF key ............................... 11, 32
PRINT key .................................. 11, 15
RE-ZERO key......................... 9, 11, 15
SAMPLE key .............................. 11, 15
Animal mode indicator ................... 11
Comparator indicators.................... 11Interval memory active indicator.... 11Interval memory standby indicator. 11
Prior notice indication of automatic
self calibration................................ 11
Processing indicator ...................... 11
Response indicators ............. 11
Stabilization indicator............... 11, 15
Standby indicator ........................... 11-DData memory ...............................................54
Data number ................................................43
Density determination kit..............................62
Digit.................................................28, 39
DP (Dump print) format ................................41-EEC, E00 .......................................................80
EC, E01 .......................................................80
EC, E02 .......................................................80
EC, E03 .......................................................80
EC, E04 .......................................................80
EC, E06 .......................................................81
EC, E07 .......................................................81
EC, E11 .......................................................78
EC, E16 .......................................................78
EC, E17 .......................................................78
EC, E20 .......................................................79
EC, E21 .......................................................79
External input ...............................................66-AA&D standard format ................................... 41
AC adapter ................................................ 6, 7
AC adapter ID label ................................... 6, 7
AC adapter jack ......................................... 6, 7
AC adapter plug......................................... 6, 7
ACAI....................................................... 19
AD-1682 Rechargeable battery ................... 84
AD-1683 DC static eliminator ...................... 86
AD-1684 Electrostatic field meter ................ 86
AD-1689 Tweezers for calibration weight .... 86
AD-8121 ...................................................... 67
AD-8121B Printer ........................................ 84
AD-8526 LAN converter .............................. 84
AD-8920 Remote display............................. 85
AD-8922 Remote controller ......................... 85
Animal mode indicator ................................. 11
Auto display-OFF......................................... 39
Auto display-ON .......................................... 39
Auto print mode ........................................... 40
Automatic Response Adjustment................. 22
Automatic Self Calibration ....................... 3, 25
AX-SW128 Foot switch................................ 85
AX-USB-25P-EX USB converter ................. 85

-F
FAST

.......................................................22-GGlass breeze break......................................84
GLP...................................................3, 50
Grounding terminal ....................................6, 7
GX-02 USB interface ...................................84
GX-04 .......................................................86
GX-06 .......................................................86
GX-10 .......................................................84
GX-11 .......................................................84
GX-12 .......................................................84
GX-13 .......................................................84-BBreeze ring .............................................. 7, 78
Bubble spirit level ...................................... 6, 7

-HHold function ..........................................21, 38

89

Repeatability .............................. 77, 82, 83, 88
RESPONSE ................................................22
Response characteristic ..............................22
RS-232C serial interface..............................65
RsCom .......................................................68
RsKey .......................................................68-IID number.................................................... 50
Inhibit ...................................................... 32
Initializing the Balance................................. 33
Interval memory mode................................. 41-KKey mode .................................................... 40
KF format..................................................... 42-SSelf check function.......................................22
Sensitivity drift........................................82, 83
SLOW .......................................................22
Stability band width ......................................38
Stabilization time..............................82, 83, 88
Stable value .....................................22, 38, 88
Static electricity ........................................9, 78
Stream mode ...............................................40-LLeveling foot .............................................. 6, 7
Linearity .......................................... 77, 82, 83lo................................................ 19, 20
LO...................................................... 48-MMain unit cover .......................................... 6, 7
Memory full.................................................. 80
MID.
...................................................... 22
MT format .................................................... 42

-U-

-N-

Underhook ...............................................9, 60
Unit mass.....................................................18
Units.......................................................12

NU (Numerical) format................................. 42

-W-

-O-

Warm up ........................................7, 8, 10, 39
Weighing capacity.............. 3, 9, 39, 79, 82, 83
Weighing pan.............................................6, 7
WinCT .......................................................68

100% reference mass ................................. 20-PPan support receptor ................................. 6, 7
Percent Mode .............................................. 20
Permit ...................................................... 32-ZZero point .................................. 27, 29, 39, 88
Zero tracking................................................39-RReference card...................................... 4, 6, 7

90

MEMO

91

MEMO

92

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Telephone: [81] (3) 5391-6132
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