AND GR Series Manual de usuario

GR-120

GR-200

GR-300

GR-202

1WMPD4000280A

Th is a hazard alert mark.

NOTE

This manual and/or the GR series balances may be changed at any time to improve the product without

notice.

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 this manual are subject to

change for improvement without notice.

Product names and company names mentioned in this manual are trademarks or registered trademarks of

their respective companies in Japan or other countries and regions.

Contents

1. Introduction ..........................................................................................................................................5

1.1. Features ............................................................................................................................................5

1.2. Compliance with FCC Rules.............................................................................................................5

2. Caution.................................................................................................................................................6

2.1. Precautions for Installing the Balance ..............................................................................................6

2.2. Cautions during Use (To Get Best Performance) .............................................................................7

2.3. Take Care of Your Balance ...............................................................................................................8

2.4. Power Supply....................................................................................................................................8

3. Unpacking Your Balance......................................................................................................................9

3.1. Installing Your Balance ...................................................................................................................10

3.2. Display Symbols and Key Operation ..............................................................................................10

4. Weighing Units ...................................................................................................................................11

5. Weighing ............................................................................................................................................12

5.1. Basic Operation (Gram Mode)........................................................................................................12

5.2. Counting Mode (PCS).....................................................................................................................13

5.3. Percent Mode (%) ...........................................................................................................................13

6. Response Adjustment ........................................................................................................................14

6.1. Automatic Response Adjustment....................................................................................................14

6.2. Manual Response Adjustment ........................................................................................................15

7. Calibration ..........................................................................................................................................15

7.1. Automatic Self Calibration ..............................................................................................................17

7.2. Calibration Using the Internal Weight .............................................................................................17

7.3. Calibration Test Using the Internal Weight......................................................................................18

7.4. Calibration Using an External Weight .............................................................................................19

7.5. Calibration Test Using an External Weight .....................................................................................20

7.6. Correcting the Internal Weight Value ..............................................................................................21

8. Function Switch and Initialization.......................................................................................................22

8.1. Permission or Prohibition................................................................................................................22

8.2. Initializing the Balance ....................................................................................................................23

9. Function Table....................................................................................................................................24

9.1. Display and Keys of the Function Table..........................................................................................24

9.2. Details of the Function Table ..........................................................................................................25

9.3. Explanation of Item "Environment, Display" ...................................................................................27

9.4. Explanation of Item "Data output mode".........................................................................................28

9.5. Explanation of Item "Data format"...................................................................................................29

9.6. Examples of Data Format .............................................................................................................31

10. ID Number and GLP Report...............................................................................................................33

10.1. Main Objectives ..............................................................................................................................33

10.2. Setting the ID Number ....................................................................................................................33

10.3. GLP Output .....................................................................................................................................34

11. Data Memory Function.......................................................................................................................39

11.1. Use and the Method of Storing Data ..............................................................................................39

11.2. Preparation of the Function Table...................................................................................................40

11.3. Enabling data memory function ......................................................................................................40

11.4. Output of Data from Memory ..........................................................................................................40

11.5. Deleting All Data at One Time.........................................................................................................41

12. Underhook .........................................................................................................................................41

13. Specific Gravity (Density) Measurement ...........................................................................................42

14. Input and Output Interface .................................................................................................................46

14.1. RS-232C Interface ..........................................................................................................................46

14.2. External Contact Input ....................................................................................................................47

15. Connection to Equipment...................................................................................................................48

15.1. Connection to AD-8127 Printer .....................................................................................................48

15.2. Connection to AD-8121B Printer...................................................................................................48

15.3. Connection to Computer ...............................................................................................................50

16. Commands.........................................................................................................................................52

16.1. Command List.................................................................................................................................52

16.2. Commands to Request Weighing Data ..........................................................................................53

16.3. Commands to Control the Balance.................................................................................................54

16.4. Commands to Request Memory Data ............................................................................................55

16.5. Acknowledge Code and Error Codes .............................................................................................56

16.6. Control using CTS and RTS ...........................................................................................................56

16.7. Related Settings..............................................................................................................................56

16.8. Command Examples.......................................................................................................................57

17. Maintenance ......................................................................................................................................60

17.1. Treatment of the Balance................................................................................................................60

17.2. Error codes .....................................................................................................................................60

17.3. Other Display ..................................................................................................................................61

18. Specifications.....................................................................................................................................62

18.1. External Dimensions .......................................................................................................................63

18.2. Optional Accessories ......................................................................................................................64

1.Introduction

THANK YOU FOR YOUR A&D PURCHASE

This manual will tell you in simple language how this balance works and how to get the most out of it in

terms of performance.

1.1. Features

Built-in Calibration Weight (internal weight), used to calibrate and verify the calibration of your

balance.

Automatic Self Calibration, using the built-in weight, adapting to changes in temperature.

Automatic Response Adjustment, adapting to vibration and drafts in the environment.

Data Memory Function, storing 200 weighing data.

Interval Memory Mode, storing weighing data periodically.

Good Laboratory Practices (GLP) data output using a serial interface.

Under Hook, for measuring specific gravity and magnetic substances.

The balance is equipped with the specific gravity measuring mode to calculate the specific gravity

(density) of a solid.

Multiple Weighing Units, with most of the common units used around the world.

RS-232C serial interface, for transmitting data and controlling your balance.

Windows communication tools software (WinCT) to allow easy communication with a computer

using Windows. The current version of the WinCT can be downloaded from the A&D website.

Door Control Lever, a front mounted door control can easily open and close one of the side doors

if connected using the door joint.

1.2. Compliance with FCC Rules

Please note that this equipment generates, uses and can radiate radio frequency energy. This

equipment 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 equipment is operated in a commercial environment. If this unit is

operated in a residential area it might cause some interference and under these circumstances the user

would be required to take, at his own expense, whatever measures are necessary to eliminate the

interference.

(FCC = Federal Communications Commission in the U.S.A.)

2.Caution

2.1. Precautions for Installing the Balance

To ensure that you get the most from your balance, please try to follow these conditions as closely as

possible:

The best operating temperature is about 20°C / 68°F at about 50% Relative Humidity.

Try to ensure a stable power source when using the AC adapter.

Please warm-up the balance for at least one hour. Plug-in the AC

adapter as usual.

The weighing room should be free of dust.

The weighing table should be solid and free from vibration, drafts

(such as frequently opening doors or windows) and as level as

possible.

Keep the balance level by using the bubble spirit level.

Don’t install the balance near heaters or air conditioners.

Don’t install the balance in direct sunlight.

Don’t use the balance near other equipment which produces

magnetic fields.

Corners of rooms are best as they are less prone to vibrations.

Calibrate the balance before using and after moving it to another

location.

Do not place or use the balance where there is flammable or

corrosive gas present.

OK NG

Bubble

spirit

level

Leveling

foot

2.2. Cautions during Use (To Get Best Performance)

For precise and accurate weighing, please take notice of the following.

Weighing errors may occur due to the influence of static electricity.

Note that if the ambient humidity drops below 45%RH, insulators

such as plastics are liable to have static electricity. Ground the

balance and perform the following as needed.

Eliminate the static electricity using the optional AD-1683A.

Increase the relative humidity at the place where the balance

is installed.

Weigh the sample in a conductive metal container or the like.

Wipe off charged materials such as plastic with a damp cloth

to suppress static electricity.

Influence of magnetism may cause weighing errors. When

measuring magnetic materials (iron, etc.), keep the sample away

from the balance main body by means such as underhook weighing.

Weighing errors may occur if there is a difference between the

ambient temperature and temperature of the sample (and the

container). For example, when the room temperature is 20°C,

convection occurs around a Petri dish or watch glass that is 40°C and

the balance displays a value lighter than the actual weight. Before

weighing the sample and the container, try to acclimatize them to the

ambient temperature. Use tweezers when handling the sample.

Perform the weighing operation carefully and quickly. If

measurement takes a long time, error-inducing factors will

increase due to changes in temperature and humidity in the

weighing chamber, air turbulence or reaction/humidity absorption

by the sample. It is advisable to use long tweezers to avoid

inserting your hands into the weighing chamber.

For weighing with 0.01 mg readability using the GR-202, it is

adavisable to install the fine range breeze break ring in place of the

breeze break ring. (Refer to “3. Unpacking your balance”.) By installing

it, the influence of air flow can be minimized.

When placing a sample on the weighing pan, do not drop it, or do not

place a sample greater than the balance weighing capacity. Place the

sample in the center of the weighing pan.

When pressing keys, do not press with a sharp object such as a pen.

Instead, press the center of the key with your finger.

Be sure to press the RE-ZERO key before weighing in order to

eliminate measurement errors.

Measurement results include error from air buoyancy. The buoyancy

of air varies depending on the sample volume, atmospheric pressure,

temperature, and humidity. Correct the buoyancy for the most precise

measurement.

Prevent foreign substances such as powder, liquid, and metal pieces

from entering the balance.

Ground

Charged

material

Metal case

Magnetic

material

Convection

40°C

20°C

Fine range

breeze break

2.3. Take Care of Your Balance

Don’t disassemble the balance. Contact your local A&D dealer if your

balance needs service or repair.

Don’t use solvents to clean the balance. For best cleaning, wipe with a dry

lint free cloth or a lint free cloth that is moistened with warm water and a

mild detergent.

When you transport the balance, hold it as shown in the right illustration.

Never lift the balance using the weighing chamber frame.

Keep magnetic substance away from the balance.

Avoid mechanical shock to your balance.

Avoid dust and water so that the balance weighs correctly. Protect the

internal parts from liquid spills and excessive dust.

Remove and clean the floor plate of the weighing chamber.

Use the special shipping box supplied for transportation.

2.4. 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 be left

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 in

weighing mode.

When the AC adapter is connected, the balance is in the standby mode if the standby indicator is

on (see "3.2. Display Symbols and Key Operation "). This is a normal state and does not harm the

balance. We recommend that you plug in your balance for at least an hour before use so it can

warm up.

3.Unpacking Your Balance

Unpack the balance carefully and keep the packing material if you want to transport the balance again in the

future. In the carton you should find this manual plus:

Note

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

Please use the dedicated AC adapter specified for the balance.

If you use the wrong AD adapter, the balance and other equipment may not operate properly.

External

Contact Input

Serial Interface

(RS-232C)

Grounding Terminal

AC Adapter

Jack

Step

Card

Step

Card

Step Card

AC Adapter ID Lables

AC Adapter

Weighing

Chamber

Breeze

Break Ring

Dust Plate

Floor Plate

Door Control Lever

Door

Joint

Levelling

Foot

Bubble Spirit

Level

Display

Keys

A side door can be opened and closed

using the Door Control Lever when the

Door Joint is connected to a side door.

Weighing

Pan

3.1. Installing Your Balance

Step 1 Consider the section "2. Caution" for installing your balance.

Step 2 Assemble the "Dust Plate", "Breeze Break Ring / Fine Range Breeze Break Ring" and "Weighing Pan" on

your balance. There is a reference illustration on the previous page.

Step 3 Adjust the level of the balance using the leveling feet.

Step 4 Connect the AC adapter to the balance. Warm up the balance for at least one hour with nothing on the

weighing pan.

3.2. Display Symbols and Key Operation

There are two types of key operations: “press and release” and

“press and hold”. The function of each key changes depending

on how the key is pressed. Do not press and hold a key unless

necessary.

Key

Press (press and release) the key

Press and hold the key

Display ON / OFF key. The stand-by indicator is displayed, when the balance is turned off

with this key. Weighing data is displayed, when the balance is turned on with this key.

Readability of weighing data is

changed.

The function table menu is displayed. Refer to

section "9. Function Table".

Units are changed (selected from the

function table). Refer to section "4.

Weighing Units".

Response adjustment is performed.

This key performs calibration of the

balance using the internal weight.

Other items of the calibration menu are

displayed.

Weighing data is stored in the balance

(Factory setting) or is output to the RS-

232C interface. This key functions

according to the function table.

Data memory menu or GLP menu is

displayed. This key functions according to

the function table. Factory setting is "not

used".

The key sets the display to zero. This key returns a weighing value to the center of zero

when the weighing pan is empty, and can also tare (cancel) the weight of container and/or

sample. Please use this key before each weighing to cancel possible error.

Stand-by indicator of

interval memory function

Active indicator of interval

memory function

Displayed data number

Automatic self

calibration notice

Stabilization indicator

Stand-by indicator

The amount of stored data

with memory data function

Processing indicator

Response indicator

Weighing data or

stored data

Blinking indicators

Press

(Press and release)

Press and

hold

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