GXA-25 External Fanless Ionizer

1WMPD4003577B

© 2019 A&D Company, Limited. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated into any language inany form by any means without the written permission of A&D Company, Limited.

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

ContentsIntroduction ........................................................................................................................................................ 2
1. Features ......................................................................................................................................................... 2
1.1. Part Names ............................................................................................................................................. 3
1.2. Installing the Ionizer ................................................................................................................................ 3
1.3. Using the Ionizer ..................................................................................................................................... 4
1.4. Controlling the Ionizer Externally ............................................................................................................ 6
2. Function Settings of the Balance ................................................................................................................... 7
2.1. Display Symbol and Operation Keys ...................................................................................................... 7
2.2. Function Table......................................................................................................................................... 8
3. Maintenance of the Electrode Unit ................................................................................................................ 9
4. Specifications................................................................................................................................................. 9
5. Options ........................................................................................................................................................ 101

Introduction
This manual describes how the GXA-25 External Fanless Ionizer (static eliminator) works and how to
get the most out of it in terms of performance. Read this manual thoroughly before using the ionizer
and keep it at hand for future reference.

1. Features□The fanless ionizer (static eliminator) can eliminate static electricity from the weighing sample
before weighing, reducing errors.
(Bipolar ions are generated by corona discharge and the weighing sample is irradiated by thoseto neutralize it.)□Each electrode unit of the ionizer is designed to be removed, cleaned and replaced.

□

An IR (touchless) switch is attached to the ionizer, and neutralization can be started without
touching the ionizer.

□

Power is supplied from the balance to allow the ionizer to be operated without using an AC adapter.

□PRINT or RE-ZERO or the neutralization function for the ionizer can be operated by using theoptional foot switch (AX-SW137-PRINT or AX-SW137-REZERO).

Static electricity
In general, when the ambient humidity is less than 45% RH, nonconductors such as powders, paper,and plastics easily become charged with static electricity. The influence of the static electricity may
cause a weighing error of several milligrams. The ionizer effectively neutralizes the electrical charge.

21.1. Part Names
External input
connector

Connector for theionizer

IR (touchless) switch

Connector for the option board

Electrodes

Connector for theexternal IR switch

LED(Not to be used)

Ionizer (rear side)

Ionizer (front side)

Option board

Double-sided tape
(To secure the ionizer)

Electrodes

Connection cable (60 cm)

Stand

1.2. Installing the Ionizer
CautionDisconnect the AC adapter before installing the ionizer to thebalance.

1. Remove the two screws, and then gently pull the option panel
with the cable connector from the balance.
Balance rear side
2. Peel off the connector that is secured to the panel with double-sided
tape and insert it into the socket of the option board.
3. Attach the option board to the balance.
Secure the board with the two screws removed in step 1.
Balance rear side
4. Using the connection cable (60 cm), connect between theoption board and the ionizer.
Balance rear side

Ionizer (rear side)
35. Place the ionizer on the stand and set it up on the side of
the balance.
(Secure the ionizer to the stand using the double-sided
tape if necessary)

Double-sided tapeStand

1.3. Using the Ionizer
Note:

Keep the weighing sample away from the electrodes while neutralizing. Placing the sample too
close to the electrodes may cause the sample to become charged.
Remove any obstacle between the electrodes and the weighing sample.
The electrodes must not be touched with tweezers, etc., while neutralizing.

1. Place the weighing sample to be neutralized in front of the ionizer.
At this time, the weighing sample to be neutralized must be kept in a range of approx. 10 cm to 30 cm
from the electrodes as shown in the figure below.
Neutralization ion generation distribution

Electrodes

Top view

Side view

Weighing sample

42. Bring your hand close to the IR (touchless) switch located at the center of the ionizer.
When the IR switch responds to the hand, the ION mark on the balance’s display and the ionizer’s
LED light up and neutralization starts. When an interval (three seconds at factory settings) set in
the balance’s function settings beforehand has passed, neutralization stops automatically. Whileneutralizing, make sure that the weighing sample is lifted up approx. 2 cm or more and isneutralized until the ionizer’s LED turns off.
ION mark

IR (touchless) switchLEDWeighing sample

Lift up the weighingsample approx.
2 cm or more.

□When a balance with a minimum display of 0.001g or 0.0001g is used, the balance operates
using a minimum display of 0.01g while the ionizer is being operated. The balance automatically
returns to the previous weighing mode a certain amount of time after neutralization is completed.

□While neutralizing, make sure that the weighing sample is lifted up and is neutralized until theionizer’s LED turns off. Failure to do so may result in the weighing sample not being sufficiently
neutralized and cause weighing errors.

□The neutralization interval (ionizer operating interval) can be changed using the balance’s
function settings. (Refer to “2. Function Settings of the Balance”)(Reference) at 4kV electrical charge
Distance (distance between the ionizer and the 10 cm
20 cm
30 cm
statically charged weighing sample)
Neutralization interval (ionizer operating interval)

1 second

3 seconds

10 seconds□

If the IR switch is kept at ON after neutralizing, the ionizer indicates a warning by flashing theLED.

□When the neutralization interval is set to “manual”, the ionizer can only be controlled externally.
The “manual” neutralization interval is up to 10 minutes.

□ While the balance is outputting data other than the weighing data (GLP data, statistical data,
data stored in memory), do not perform neutralization or operation using the foot switch (AXSW137-PRINT or AX-SW137-REZERO).
Doing so may prevent the balance from updating the display. If the balance’s display is not
updated, reset the balance by unplugging the AC adapter and plugging it back in.
For details about the balance data output (function settings), refer to the balance instruction manual.

5

・1.4. Controlling the Ionizer Externally
By using the foot switch (AX-SW137-PRINT or AX-SW137-REZERO), PRINT or RE-ZERO or theneutralization function for the ionizer can be operated.
□ Connect the foot switch to the external input connector.
□ By selecting “Functions for the external input connector ()” or “Functions for theexternal input connector ()” for “Ionizer function ()” in the balance’s function
settings, key functions can be assigned to the terminal for the AX-SW137-PRINT (soldseparately) or AX-SW137-REZERO (sold separately).
□ Press the foot switch while the ionizer is operated to stop neutralization.
For balance software version 1.200 to 1220
When the AX-SW137-PRINT is connected to the balance
Parameter
ClassItem0

ION key

Description

Assigns a neutralization starting key to the AXSW137-PRINT.
(The ionizer’s IR switch is disabled.)

・ 1

PRINT key

Assigns the function of the balance’ PRINT key.

When the AX-SW137-REZERO is connected to the balance
Parameter
ClassItem
Description
0

ION key

Assigns a neutralization starting key to the AXSW137-REZERO.
(The ionizer’s IR switch is disabled.)

・ 1

RE-ZERO key

Assigns the function of the balance RE-ZERO key.

For balance software version 1.300 or later
ClassItem

Parameter
0EX 5W

・1Description
Assigns a neutralization starting key.

ION key(The ionizer’s IR switch is disabled.)

PRINT keyorRE-ZERO key

When the AX-SW137-PRINT (sold separately),assigns the function of the balance’ PRINT key.
When the AX-SW137-REZERO (sold separately),assigns the function of the balance’ RE-ZERO key.

・indicates factory settings.
Connector for the ionizer

External input connector

Connector for theexternal IR switch□The connector for the external IR switch is not used with the GXA-25.

62. Function Settings of the BalanceThe function table stores parameters that specify how to operate the balance, and it is used to monitor
or update the parameters. In the function settings, specify the GXA-25 operations. The parameters are
stored in memory even if the AC adapter is removed and are retained until updated.
The function table menu consists of two layers as shown in the diagram below. The first layer is the“Class” and the second layer is the “Item”. Each item stores a "parameter". The last displayedparameter is in effect. After the PRINT key is pressed, these updated parameters are applied tooperations of the balance.
Example of settings and menu structure「データメモリ機能」を「計エThe following
example is when “External input connector(AX-SW137-REZERO)” is set to the ION key.

Starts and entersweighing mode

Item
“Functions for the external inputconnector”

Press andholdlon

3PresstwiceClassParameters
Press one timeexrR
ion fnc
Items

Bba5fbc

Ends and entersweighing mode

Note: The balance may not function properly depending on the settings and the operating environment.
Be sure to set parameters correctly.

2.1. Display Symbol and Operation Keys
The 〇 indicates that the parameter displayed is in effect.
Enters the function table when pressed and held in the weighing mode.
Selects the class or item in the function table.
Changes the parameter.
Moves to an item in the class when a class is displayed.
Stores the new parameter and displays the next class when an item is displayed.
Cancels the new parameter and displays the next class when an item is displayed.
Exits the function table and returns to the weighing mode when a class is displayed.

7

2.2. Function Table
Note: Functions available differ by the balance model.
Classba5fnc
Environmentdisplay
CladjJ
Clock adjustment
Cp fncComparator

Item

Description

Parameter

Comparator
value
Cp beepEEP
Comparator
buzzerdout
Data output
5if
Serial interface
U5bUSB interface

Refer to the balance instruction manual.

ap fncApplication
Minimum weighing
warning function
Unit
Unit
d5 fncSpecific gravity
measuring
function
id
ID number setting
Password lockauto Cal*
Auto calibration
ion
Neutralization interval

0・1
2
3

ion fnc
Ionizer function

Functions for theexternal input connector⋆1
Functions for theexternal input connector⋆2EX 5W

Functions for theexternal input connector

0・10・10・11 second
3 seconds
10 seconds
Manual for up to 10 minutes (Only external control isenabled. The ionizer’s IR switch is disabled.)
ION key (The ionizer’s IR switch is disabled.)
PRINT key
ION key (The ionizer’s IR switch is disabled.)
RE-ZERO key
ION key (The ionizer’s IR switch is disabled.)
PRINT key (When the AX-SW137-PRINT is connected.)
RE-ZERO key (When the AX-SW137-REZERO is connected.)

C5in*Internal mass value correction

Refer to the balance instruction manual.

* Applies only to the GX-A series.
・indicates factory settings.
⋆ 1 For balance software version 1.200 to 1220
⋆ 2 For balance software version 1.300 or later83. Maintenance of the Electrode Unit
When using the ionizer for a long time, dust and stains may
stick to the electrodes. Clean them periodically to maintainperformance.

1

2

When needles of the electrodes are worn down andneutralization ability is not restored after cleaning them,
replace both electrode units with new ones.
The standard life of an electrode unit is approximately

Cleaning
Electrode needle

10,000 hours.

Electrode unitReplacing the Electrode Units
1

Turn the electrode units 45 degrees counterclockwise and remove
them from the ionizer.

2

Replace both electrode units with new ones.

3

Turn the electrode units 45 degrees clockwise and insert them into theionizer.

Note: Do not replace, remove and clean the electrode units while the ionizer is operating as there isdanger of electrical shock.
(Replace the balance with the power supply disconnected or with the connection cabledisconnected.)

4. Specifications
Static neutralization method

Corona discharge

Effective neutralization range

Approx. 10 cm to 50 cm from the electrode needle

Neutralization performance

1 second (at a distance of approx. 10 cm and 4 kV electrical charge)

Ambient temperature andhumidity

10 to 40 °C, 85% RH or less (no condensation)

Electrode needle

Tungsten (with a life of approx. 10,000 hours)

MassApprox. 300 g (including the stand)95. Options
Electrode Unit

AX-BM-NEEDLESET(4 pieces)□Replacement electrode units□

Replace both units with new ones at the same time.

□Refer to "3. Maintenance of the Electrode Unit " for thereplacement method.

Foot switch with a plug (PRINT)□AX-SW137-PRINT

Controls the balance PRINT operation and the ionizer
operations.

Foot switch with a plug (REZERO)□AX-SW137-REZERO

Controls the balance RE-ZERO operation and the ionizer
operations.

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MEMO

11

MEMO

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