A&D Weighing EJ-120, EJ-200, EJ-300, EJ-410, EJ-610 Instruction Manual
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1WMPD4001917D
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
CAUTION
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.
Please note that this equipment generates, uses and can radiate radio frequency energy.
(FCC = Federal Communications Commission in the U.S.A.)
Compliance with FCC rules
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.
Copyright 2010
A potentially hazardous situation, which if not avoided, could result
in death or serious injury.
A potentially hazardous situation, which if not avoided, may result in
minor or moderate injury.
Microsoft, Excel and Word are trademarks of Microsoft Corporation.
CONTENTS
1. INTRODUCTION .............................................................................................................3
2. UNPACKING ...................................................................................................................3
3. PART NAMES AND FUNCTIONS...................................................................................4
4. SETTING UP ...................................................................................................................5
4-1. Setting up your balance .................................................................................................................5
4-2. Power source.................................................................................................................................5
4-3. Breeze break .................................................................................................................................6
4-4. Storage ..........................................................................................................................................6
5. OPERATION....................................................................................................................7
5-1. Turn the power ON and OFF .........................................................................................................7
5-2. LCD backlight ................................................................................................................................7
5-3. Units ..............................................................................................................................................8
5-4. Selecting a weighing unit ...............................................................................................................9
5-5. Basic operation..............................................................................................................................9
5-6. Counting mode (pcs) ...................................................................................................................10
5-7. Percent mode (%)........................................................................................................................ 11
6. COMPARATOR .............................................................................................................12
6-1. Setting example...........................................................................................................................12
7. CALIBRATION ..............................................................................................................14
7-1. Calibration using a weight............................................................................................................14
7-2. Gravity acceleration correction ....................................................................................................16
8. FUNCTIONS..................................................................................................................17
8-1. Key operation ..............................................................................................................................17
8-2. Entering the function setting mode ..............................................................................................17
8-3. Setting example...........................................................................................................................18
8-4. Storing weighing units..................................................................................................................19
8-5. Function list .................................................................................................................................20
9. OPTIONS.......................................................................................................................22
9-1. EJ-02 USB interface ....................................................................................................................22
9-2. EJ-03 RS-232C serial interface ...................................................................................................22
9-3. EJ-07 / EJ-08 Underhook ............................................................................................................26
9-4. EJ-11 Breeze break .....................................................................................................................26
9-5. EJ-12 Carrying case ....................................................................................................................26
9-6. EJ-13 Density determination kit ...................................................................................................27
10. ID NUMBER AND GLP................................................................................................30
10-1. Setting the ID number................................................................................................................30
10-2. Output example .........................................................................................................................31
10-3. Calibration test using a weight...................................................................................................32
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11. MAINTENANCE ..........................................................................................................34
11-1. Notes on maintenance ...............................................................................................................34
11-2. Error codes ................................................................................................................................34
12. SPECIFICATIONS.......................................................................................................36
12-1. EJ series balances.....................................................................................................................36
12-2. Other weighing units ..................................................................................................................37
12-3. Options ......................................................................................................................................38
12-4. Dimensions................................................................................................................................38
GRAVITY ACCELERATION MAP .....................................................................................39
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1. INTRODUCTION
This manual describes how this balance works and how to get the most out of
it in terms of performance.
The EJ series balances have the following features:
The EJ series are high-resolution type electronic balances having a display
resolution of 1/12,000 ~ 1/60,000.
The balance has a counting function, a percent function and a comparator
function.
The LCD backlight will help with use in a dimly lighted place.
The balance can be operated with an AC adapter, or 4 x “AA” size dry-cell
batteries for cordless operation.
The optional RS-232C serial interface can be connected with a printer or personal
computer, and Good Laboratory Practice (GLP) data can be obtained.
The optional USB interface is available for connection to a personal computer.
2. UNPACKING
When unpacking, check whether all of the following items are included:
Weighing pan Weighing pan
Main unit Main unit
EJ-120 / EJ-200 / EJ-300 EJ-1500 / EJ-2000 / EJ-3000
EJ-410 / EJ-610 EJ-4100 / EJ-6100
Instruction Manual
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3. PART NAMES AND FUNCTIONS
STABLE indicator
NET indicator
ZERO indicator
ON:OFF key
Calibration
switch cover
(bottom)
Spirit level
UNITS key
RE-ZERO key
Battery indicator ACAI indicator Comparator results Density
(Specific gravity)
STABL
Weighing
NE
ZER
units
Weighing pan
Round pan for
EJ-120 / EJ-200 / EJ-300 / EJ-410 / EJ-610.
LCD
Leveling foot
SAMPLE key
PRINT key
AC adapter jack
EJ-02 / EJ-03 slot
Batter
cove
Security slot
(Use a security cable commercially available.)
Turns the power ON or OFF.
Held down to enter the
function setting mode.
Clears the display to zero
(combined zero and tare).
Outputs the weight value to a
printer.
4
Enters the sample unit
weight storing mode.
% mode:
Enters the 100% weight
storing mode.
pcs mode:
Stores a unit weight, 100%
weight or other setting values
to the balance.
Switches the weighing units.
4. SETTING UP
4-1. Setting up your balance
1. Place the weighing pan on the main unit.
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.
3. Calibrate your balance before use. (See “7. CALIBRATION”)
Balance location
To measure correctly, to keep the balance in good condition, and to prevent hazards,
observe the following:
Do not install the balance in locations that are subject to excessive dust, breezes,
vibration, large temperature fluctuations, condensation, or that may have
magnetic fields.
Do not install the balance on a surface that is soft or that may cause the balance
level to shift.
Do not install the balance in direct sunshine.
Do not install the balance near heaters or air conditioners.
Do not use an unstable AC power source.
Do not install the balance in a place where combustible or corrosive gases may exist.
Allow the balance to reach equilibrium with the ambient temperature before use.
Switch the power ON at least half an hour before use so that the balance can
warm up.
When the balance is installed for the first time, or the balance has been moved,
carry out calibration as described in “7. CALIBRATION”.
4-2. Power source
For the power source, the AC adapter or 4 x “AA” size dry-cell batteries can be used.
When using the AC adapter
Use a stable power source. To use the AC adapter,
insert the AC adapter plug into the AC adapter jack
on the rear side of the EJ.
When using the dry-cell batteries
Prepare 4 x AA size (LR6 / R6P) dry cell batteries. The batteries are not included with
the product.
CAUTION
Take great care with the polarity of the batteries. The polarity marks are shown in
the battery box.
Replace used batteries with four new ones when “lb0” is displayed.
Do not mix used and new batteries. Do not mix battery types. It may cause damage
to the batteries or the balance.
The battery life depends on the ambient temperature, how used and so on.
AC adapter jack
5
Remove batteries when the balance is not to be used for a long time. They may
leak and cause damage to the balance.
Damage due to battery leakage is not covered by the warranty.
Installing batteries
1. Turn off the balance and disconnect the AC adapter if used.
2. Slide the battery cover off.
3. Push the battery box up to unhook and pull it out.
4. Insert new four batteries (LR6 / R6P / AA size) into the
battery box, taking extreme care of the polarities.
5. Push the battery box into the balance as before.
6. Attach the battery cover.
Battery cover
Hook
Battery box
Hook
The battery indicator turns on when the balance is powered by the batteries. It will
change as the battery voltage decreases.
New Æ Æ Æ Coming close to “lb0”.
4-3. Breeze break
An optional breeze break is available. See “9-4. EJ-11 Breeze break”.
4-4. Storage
The EJ series balance can be stacked on top of another when not in use.
Do not stack more than 4 units.
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5. OPERATION
5-1. Turn the power ON and OFF
1. Press the ON:OFF key to turn the power ON.
2. Press the ON:OFF key again, and the power will be switched OFF.
It is possible to have the power automatically switched OFF, if zero is
STABL
NE
ZER
All of the symbols are displayed as shown above.
(About units: Only the available units will be displayed.)
The display turns off except for a weighing unit and the decimal point.
The balance waits for the weight value to become stable, and then, zero will be
displayed with the ZERO indicator (power-on zero).
The range for power-on zero is within ±10% of the weighing capacity around the
calibrated zero point.
If the power is switched ON while there is a load beyond this range, the balance will
be tared to zero and the NET indicator and the ZERO indicator turn on.
Auto-power off function
displayed for approximately 5 minutes. See “8-5. Function list” and
poff
set the function to “
”.
Weighing
units
5-2. LCD backlight
The LCD backlight will turn on when the weight value changes more than 4d (4 x min.
display division) or any key operation is done. When the weight value becomes and
stays stable for some moments, the backlight will automatically turn off. There is also a
setting that the backlight is always on or off. For details, see the function setting “ltUp”
of “Function list”.
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5-3. Units
The most common unit of weight used around the world is the gram, but there is often
a need to shift to alternative units specific to the country where the balance is used or
to select modes such as counting or percent.
The units and the order they appear in the display are as follows:
Pound
Troy ounce
Ounce (avoir)
Percent mode
Metric carat
Momme
Counting mode
Pennyweight
Gram
Grain
Density
Newton
(specific gravity)
Among the units, those available for the user have been set at the factory before
shipping.
The unit can be selected in the function setting mode. The order of the units available
is the same as above.
Note
It is possible to store only the units that will be actually used from
the units available. It is also possible to specify the unit that will be
shown first when the power is switched ON. For details, see “8-4.
Storing weighing units”.
Conversion table
Units Name Conversion to gram
oz Ounce (avoir) 028.349523125 g
lb Pound (UK) 453.59237 g
ozt Troy ounce 031.1034768 g
ct Metric carat 000.2 g
mom momme 003.75 g
dwt Pennyweight 001.55517384 g
GN Grain (UK) 000.06479891 g
t tola 011.6638038 g
tl tael (Hong Kong general, Singapore) 037.7994 g
tl tael (Hong Kong jewelry) 037.4290 g
tl tael (Taiwan) 037.5 g
“Newton” is the value calculated by “(weight in grams) x (9.80665 m/s2) / 1000”.
The unit “t (tola)” and three kinds of “tl (tael)” are for special versions only.
One of them can be selected and installed at the factory.
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5-4. Selecting a weighing unit
Press the UNITS key to select a unit.
The following sections are a description of the
three common units: g (gram mode), pcs (counting
mode), and % (percent mode).
Each pressing switches the
units available in the orde
described on the previous
page.
ZERO
0.0
STABLE indicator
5-5. Basic operation
1. Select a weighing unit.
2. When the display does not show zero, press the
RE-ZERO key to set the display to zero.
3. When using a tare (container), place the
container on the weighing pan, and press the
RE-ZERO key to subtract the tare weight.
4. Place the object to be weighed on the pan or in
the container.
Wait for the STABLE indicator to be displayed
and read the value.
5. Remove the object from the pan.
The RE-ZERO key will zero the balance if
the weight is within ±2% of the weighing
capacity around the power-on zero point.
The ZERO indicator
weight exceeds +2% of the weighing
capacity, it will be subtracted from zero as a
tare weight. In this case the ZERO and NET
indicators turn on.
turns on. When the
NET
ZERO
0.0
NET
150.3
STABLE indicato
Precautions during operation
Make sure that the STABLE indicator is on whenever reading or storing a
value.
Do not press the keys with a sharp object such as a pencil.
Do not apply a shock or a load to the pan that is beyond the weighing
capacity.
Keep the balance free from foreign objects such as dust or liquid.
Calibrate the balance periodically to maintain weighing accuracy. (See “7.
CALIBRATION”.)
Containe
Weighing pan
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5-6. Counting mode (pcs)
The balance weighs the sample pieces and calculates the unit weight. Using the
sample unit weight, the scale counts the number of items in the sample.
As for the minimum unit weight acceptable, see the function setting “Umin”.
Selecting the counting mode
1. Press the UNITS key to select
Storing the sample unit
2. Press the SAMPLE key to enter the sample
unit weight storing mode.
3. To select the number of samples, press the
1SAMPLE key. It may be set to 5, 10, 25, 50,
or 100.
4. Place a tare container on the weighing pan, and
press the RE-ZERO key. Confirm that the
right side of the number of samples shows zero.
5. Place the number of samples specified on the
pan. In this example, 25 pieces.
6. Press the PRINT key to calculate and store
the unit weight. Remove the sample. The
balance is set to count objects with this unit
weight.
Counting the objects
7. Place the objects to be counted on the pan.
Counting mode using the ACAI function
ACAI
8. If a few more samples are added, the ACAI
TM
(Automatic Counting Accuracy Improvement) is a function that improves the
accuracy of the unit weight by increasing the number of samples as the counting
process proceeds.
indicator is displayed. (To prevent an error, add
three or more. The ACAI indicator will not be
displayed if overloaded.)
.
( :pieces)
Confirm the display
ZERO
0
10 -
Each pressing switches
the number of samples
25 -
Weighing pan
25 0
25
CAI indicato
ACAI
25
Containe
Samples
(25 pcs)
To store
10
9. The balance re-calculates the unit weight while the ACAI indicator is blinking. Do not
touch the balance or samples on the pan until the ACAI indicator turns off.
10. Counting accuracy is improved when the ACAI indicator turns off. Each time the
above operation is performed, a more accurate unit weight will be obtained. There is
no definite upper limit of ACAI range for the number of samples exceeding 100. Try
to add a similar number of samples as that displayed.
5-7. Percent mode (%)
Displays the weight value in percentage compared to a reference (100%) weight.
Selecting the percent mode
1. Press the UNITS key to select %. (%:percent)
Storing the reference (100%) weight
2. Press the SAMPLE key to enter the
reference weight storing mode.
3. Press the RE-ZERO key to display 100 0%.
4. Place the sample to be set as the reference
weight on the pan.
5. Press the PRINT key to store the reference
weight. Remove the sample.
Reading the percentage
6. Place the object to be compared to the
reference weight on the pan. The displayed
percentage is based on 100% of the reference
weight.
ZERO
0.0
100 -
100 0
Weighing pan
Sample corresponding
to the 100% weight
To store
100.0
Object to be
compared
75.8
%
%
%
%
%
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6. COMPARATOR
The results of the comparison are indicated by HI, OK or LO on the display.
The comparison is as follows:
LO < Lower limit value ≤ OK ≤ Upper limit value < HI
Operating conditions (see the function setting “Cp”):
No comparison (comparator function disabled).
Compares all data.
Compares all stable data.
Compares plus data except those near zero (plus data greater than +4d).
Compares stable plus data except those near zero (stable plus data
greater than +4d).
Compares all data except those near zero (all data greater than +4d or
less than -4d).
Compares stable data except those near zero (stable data greater than
+4d or less than -4d).
d = the smallest display division. e.g.: 4d = four display divisions
The upper limit and lower limit numerical values are common to each of the weighing,
counting and percent mode. The example for EJ-120/200/300/410/610 is as follows.
6-1. Setting example
This example will be “Compares plus data except
those near zero”.
Selecting a comparison mode
1. Press and hold the SAMPLE key to display
2. Press the PRINT key, then the balance displays
3. Press the SAMPLE key several times to display
4. Press the RE-ZERO key several times to display
5. Press the PRINT key to store the setting.
Upper limit value “001010”: “10.10g” “1010pcs” “101.0%”
Lower limit value “000990”: “9.90g” “990pcs” “99.0%”
func .
(If the comparison mode is already set, press the
SAMPLE key to go to “Entering the upper and
lower limit values”.)
poff X .
Cp X .
Cp 3 .
Cp Hi appears after end .
Press and hold
func
poff 0
Press
several times
Cp 0
Press
several times
Cp 3
To store
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