AND GXA-25 External Fanless Ionizer Instruction Manual
- June 7, 2024
- AND
Table of Contents
AND GXA-25 External Fanless Ionizer Instruction Manual
© 2019 A&D Company, Limited. 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, Limited.
The contents of this manual and the specifications of the instrument covered by this manual are subject to change for improvement without notice.
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 those
to 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 the optional 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.
1.1. Part Names
1.2. Installing the Ionizer
Caution
Disconnect the AC adapter before installing the ionizer to the balance.
1. Remove the two screws, and then gently pull the option panel with the cable connector from the balance.
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. 4. Using the connection cable (60 cm), connect
between the option board and the ionizer. Balance rear side
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)
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.
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. While neutralizing, make sure that the weighing sample is lifted up approx. 2 cm or more and is neutralized until the ionizer’s LED turns off.
□ 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 the ionizer’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
□ If the IR switch is kept at ON after neutralizing, the ionizer indicates a
warning by flashing the LED.
□ 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.
1.4. Controlling the Ionizer Externally
By using the foot switch (AX-SW137-PRINT or AX-SW137-REZERO), PRINT or RE-ZERO
or the neutralization function for the ionizer can be operated.
□ Connect the foot switch to the external input connector.
□ By selecting “Functions for the external input connector (Ex PRE)” or
“Functions for the external input connector (Ex R)” for “Ionizer function (ion
Fnc)” in the balance’s function settings, key functions can be assigned to the
terminal for the AX-SW137-PRINT (sold separately) 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
- indicates factory settings.
□ The connector for the external IR switch is not used with the GXA-25. 6
2. Function Settings of the Balance
The 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 displayed parameter is in effect. After the (PRINT) key is pressed, these updated parameters are applied to operations of the balance.
Example of settings and menu structure
The following example is when “External input connector (AX-SW137-REZERO)” is
set to the ION key.
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
2.2. Function Table
Note: Functions available differ by the balance model.
- 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 later
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 maintain performance.
□ When needles of the electrodes are worn down and neutralization ability is
not restored after cleaning them, replace both electrode units with new ones.
The standard life of an electrode unit is approximately 10,000 hours.
Replacing the Electrode Units
Electrode unit
- Turn the electrode units 45 degrees counterclockwise and remove them from the ionizer.
- Replace both electrode units with new ones.
- Turn the electrode units 45 degrees clockwise and insert them into the ionizer.
Note: Do not replace, remove and clean the electrode units while the ionizer is operating as there is danger of electrical shock. (Replace the balance with the power supply disconnected or with the connection cable disconnected.)
4. Specifications
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 the replacement 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.
MEMO
MEMO
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