A&D EJ-123 User manual

1WMPD4002746E
EJ
EJ-123/EJ-303 -123/EJ-303
EJ-1202/EJ-3002
EJ-1202/EJ-3002
EJ-54D2
EJ-54D2
Compact Precision Balance
Compact Precision Balance

This Manual and Marks
All safety messages are identified by the following, “WARNING” or “CAUTION”, of ANSI
Z535.4 (American National Standard Institute: Product Safety Signs and Labels). The
meanings are as follows:
WARNING A potentially hazardous situation, which if not avoided, could result
in death or serious injury.
CAUTION A potentially hazardous situation, which if not avoided, may result
in minor or moderate injury.
This is a hazard alert mark.
Note This manual is subject to change without notice at any time to improve the product. No
part of this manual may be photocopied, reproduced, or translated into another language
without the prior written consent of the A&D Company.
Product specifications are subject to change without any obligation on the part of the
manufacturer.
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 the equipment is
operated in a commercial environment. If this unit is operated in a residential area it may
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.)
Copyright 2019
Microsoft, Excel and Word are trademarks of Microsoft Corporation.

1
CONTENTS
1. INTRODUCTION ....................................................................................................................3
2. UNPACKING...........................................................................................................................4
3. PART NAMES AND FUNCTIONS ......................................................................................... 5
4. SETTING UP ..........................................................................................................................8
4.1. Setting Up Your Balance...................................................................................................................................8
4.2. Power Source....................................................................................................................................................9
4.3. Breeze Break (For the EJ-123 / EJ-303) ....................................................................................................... 11
4.4. Breeze Break (For the EJ-54D2) ...................................................................................................................12
5. OPERATION .........................................................................................................................14
5.1. Turn the Power ON and OFF .........................................................................................................................14
5.2. LCD Backlight .................................................................................................................................................14
5.3. Units.................................................................................................................................................................15
5.4. Selecting a Weighing Unit ..............................................................................................................................16
5.5. Basic Operation (Gram Mode) .......................................................................................................................16
5.6. Weighing Range (EJ-54D2 only) ...................................................................................................................17
5.7. Display Hold Function.....................................................................................................................................17
5.8. Counting Mode (pcs) ......................................................................................................................................18
5.9. Percent Mode (%)...........................................................................................................................................19
6. ACCUMULATION FUNCTION.............................................................................................20
6.1. Indicators and Keys ........................................................................................................................................20
6.2. Selecting a Weighing Unit ..............................................................................................................................21
6.3. Adding the Accumulation Data .......................................................................................................................21
6.4. Displaying the Accumulation Data .................................................................................................................21
6.5. Deleting the Accumulation Data.....................................................................................................................21
7. CALIBRATION ......................................................................................................................22
7.1. Calibration Using a Weight .............................................................................................................................22
7.2. Gravity Acceleration Correction......................................................................................................................23
8. FUNCTIONS.........................................................................................................................24
8.1. Key Operation .................................................................................................................................................24
8.2. Entering the Function Setting Mode ..............................................................................................................24
8.3. Setting Example..............................................................................................................................................25
8.4. Storing Weighing Units ...................................................................................................................................26
8.5. Function List ....................................................................................................................................................27
9. OPTIONS..............................................................................................................................29
9.1. EJ-02 USB Interface .......................................................................................................................................29
9.2. EJ-03 RS-232C Serial Interface.....................................................................................................................30
9.3. Data Format ....................................................................................................................................................31
9.4. EJ-13 Density Determination Kit ....................................................................................................................33
10. ID NUMBER AND GLP.........................................................................................................36

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10.1. Setting the ID Number ................................................................................................................................36
10.2. GLP Report .................................................................................................................................................37
11. MAINTENANCE ...................................................................................................................41
11.1. Notes on Maintenance ...............................................................................................................................41
11.2. Error Codes.................................................................................................................................................42
12. SPECIFICATIONS................................................................................................................44
12.1. Generals......................................................................................................................................................44
12.2. Other Weighing Units..................................................................................................................................46
12.3. Options ........................................................................................................................................................47
12.4. Dimensions .................................................................................................................................................47
13. GRAVITY ACCELERATION MAP ........................................................................................50

3
1. INTRODUCTION
This manual describes how the compact precision balances work and how to get the
most out of them in terms of performance.
The EJ-123, EJ-303, EJ-1202, EJ-3002 and EJ-54D2 balances have the following features:
The EJ-123, EJ-303, EJ-1202 and EJ-3002 are high-resolution type electronic balances
having a display resolution of 1/120,000 to 1/300,000.
The EJ-54D2 is a dual-range balance as shown below:
Gram mode Weighing capacity 22 g/Minimum display division 0.0002 g
Weighing capacity 52 g/Minimum display division 0.001 g
The EJ-123, EJ-303 and EJ-54D2 are equipped with a breeze break which is provided
as standard for more accurate weighing.
The EJ-54D2 is equipped with a carat pan for weighing jewelry which is provided as
standard.
The balances have a counting function, a percent function, a hold function and an
accumulation function.
The LCD backlight will help with use in a dimly lighted place.
The balances can be operated with an AC adapter, or 4 x size “AA” batteries for
cordless operation.
An optional USB interface is available for connecting the balance to a personal
computer.
An optional RS-232C serial interface is available for connecting the balance to a
printer or personal computer and outputting Good Laboratory Practice (GLP) data.

4
Protective film
2. UNPACKING
When unpacking the balance, check whether all of the following items are included and
remove the protective film for the breeze break and the weighing pan before use:
Main unit Main unit
EJ-123 / EJ-303 EJ-1202 / EJ-3002
Weighing pan
Weighing pan
Wind shield cap
(EJ-123 / EJ-303 only)
Main unit
EJ-54D2
Carat pan
Weighing pan
Pan support
Instruction Manual
AC adapter
Please confirm that the AC adapter
type is correct for your local voltage
and receptacle type

5
3. PART NAMES AND FUNCTIONS
EJ-123 / EJ-303 / EJ-1202 / EJ-3002
Breeze break
(EJ-123 / EJ-303 only)
Spirit level
ON:OFF key
Serial number
LCD
SAMPLE key
Calibration switch cover (bottom) PRINT key
RE-ZERO key
Leveling foot
UNITS key
EJ-02 / EJ-03 slot
Battery cover
Security slot AC adapter jack
(Use a security cable
commercially available.)
Weighing pan
(The shape of weighing pan of
the EJ-1202 / EJ-3002 is square.)
Wind shield ca
p
(Accessory)
(EJ-123 / EJ-303 only)

6
EJ-54D2
Breeze break
Weighing pan
Spirit level
Leveling foot
Serial number
LCD
SAMPLEkey
PRINT key
RE-ZERO key
UNITSkey
EJ-02 / EJ-03 slot
Battery cover
Security slot
(Use a security cable AC adapter jack
commercially available.)
ON : OFF key
Calibration switch cover (bottom)

7
Total indicator Measurement in air
for specific gravity
M+ indicator
Measurement in water
ACAI indicator for specific gravity
Battery indicator Density (Specific gravity)
Hold indicator
STABLE indicator
NET indicator
ZERO indicator
Turns the power ON or OFF.
Switches the weighing units and modes.
Clears the display to zero (zero and tare).
Weighing mode (EJ-54D2 only):
Changes the weighing range (when “rng 0” is selected.)
pcs mode: Enters the sample unit weight storing mode.
% mode: Enters the 100% weight storing mode.
Accumulation mode: Adds the weight value to total.
Held down to enter the function setting mode.
Outputs the weight value to a printer or personal computer.
Stores a unit weight, 100% weight or other setting values to the balance.
Weighing units
STABLE
NET
ZERO

8
4. SETTING UP
4.1. Setting Up Your Balance
1. Place the weighing pan on the balance.
2. Adjust the level of the balance using the leveling feet. Use the spirit level to confirm.
The bubble should be in the center of the circle.
For the EJ-123, EJ-303, EJ-1202 and EJ-3002 balances, the two leveling feet on the
front side have a two-tier structure. To adjust the height of the balance, turn the lower
leveling feet. Loosen the upper leveling feet if the lower leveling feet are not easy to
turn.
Loosen the upper leveling foot if the
lower leveling foot is not easy to turn.
Adjust the height of the balance by
turning the lower leveling foot.
After adjusting the height of the balance,
tighten the upper leveling feet
if a rattling of the leveling feet occurs.
3. Calibrate your balance before use. (Refer to “7. CALIBRATION”)
About the wind shield cap (EJ-123 / EJ-303 only)
Should the displayed weight value be unstable due to a draft, attach the accessory wind
shield cap to the hole located on the top of the breeze break.
It is possible to reduce the entry of a draft into the breeze break to some extent.
If attached, it may take time for the STABLE indicator to be displayed due to a variance
in air pressure as a result of the closure of the breeze break.
Wind shield cap (accessory)