A&D EK-AEP Series User manual

1WMPD4003520A 2019.03.27

This Manual and Marks
All safety messages are identified by the following, “DANGER”, “WARNING” or
“CAUTION”, of ANSI Z535.4 (American National Standard Institute: Product Safety Signs
and Labels). The meanings are as follows:
An imminently hazardous situation which, if not avoided, will result in
death or serious injury.
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.
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 A&D Company, Limited.
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 this 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.)
Copyright 2019

1
CONTENTS
1. INTRODUCTION .............................................................................................................3
2. UNPACKING ...................................................................................................................3
3. SAFETY INSTRUCTIONS AND PRECAUTIONS ...........................................................4
3-1. Safety Instructions on Intrinsically Safe Structure......................................................4
3-2. Precautions on Installation.........................................................................................4
3-2. Precautions on Power Source ...................................................................................5
4. SETTING UP ...................................................................................................................6
4-1. Setting up Your Balance ............................................................................................6
4-2. Installing/Replacing the Batteries ..............................................................................6
4-3. When Weighing Objects that are Prone to Static Electricity.......................................7
5. CONFORMING STANDARDS.........................................................................................8
5-1. IECEx ........................................................................................................................8
5-2. ATEX .........................................................................................................................8
5-3. FM, FMc (Zone).........................................................................................................8
5-4. FM, FMc (Division) ....................................................................................................8
6. PART NAMES AND FUNCTIONS.................................................................................10
7. OPERATION..................................................................................................................11
7-1. Turn the Power ON and OFF................................................................................... 11
7-2. LCD Backlight.......................................................................................................... 11
7-3. Units ........................................................................................................................12
7-4. Selecting a Weighing Unit........................................................................................13
7-5. Basic Operation .......................................................................................................13
7-6. Counting Mode (pcs) ...............................................................................................14
7-7. Percent Mode (%)....................................................................................................16
8. COMPARATOR .............................................................................................................17
8-1. Setting Example ......................................................................................................17
9. CALIBRATION ..............................................................................................................19
9-1. Calibration Using a Weight ......................................................................................19
9-2. Gravity Acceleration Correction ...............................................................................21
10. FUNCTIONS................................................................................................................22
10-1. Key Operation........................................................................................................22
10-2. Entering the Function Setting Mode ......................................................................22
10-3. Setting Example ....................................................................................................23
10-4. Storing Weighing Units ..........................................................................................24
10-5. Function List ..........................................................................................................25
11. DATA OUTPUT VIA OPTICAL SIGNAL ......................................................................27

2
12. ID NUMBER AND GLP................................................................................................30
12-1. Setting the ID Number ...........................................................................................30
12-2. Output Example.....................................................................................................31
12-3. Calibration Test Using a Weight.............................................................................32
13. OPTION .......................................................................................................................34
14. MAINTENANCE ..........................................................................................................35
14-1. Notes on Maintenance...........................................................................................35
14-2. Error Codes ...........................................................................................................35
15. SPECIFICATIONS .......................................................................................................37
15-1. Specifications.........................................................................................................37
15-2. Option....................................................................................................................37
15-3. External Dimensions..............................................................................................37
15-4. Other Weighing Units.............................................................................................38
GRAVITY ACCELERATION MAP .....................................................................................39

3
Pan support
1. INTRODUCTION
This manual describes how this balance works and how to get the most out of it in
terms of performance.
The EK-AEP series balances have the following features:
 The EK-AEP series are intrinsically safe electronic balances complying with
international standards such as IECEx and ATEX or FM requirements.
 The EK-AEP series balances can be used in areas where explosive atmospheres
are present. (For details on the intrinsically safe structure, refer to “5.
CONFORMING STANDARDS.”)
The EK-AEP series are high-resolution type electronic balances having a display
resolution of 1/12,000 or 1/30,000.
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.
As a power source, four “AA”, “LR6” or “AM3” batteries are used.
2. UNPACKING
When unpacking, check whether all of the following items are included:
Weighing pan Weighing pan
Main unit Main unit
EK-300AEP EK-3000AEP
EK-12KAEP
Instruction Manual Allen wrench (nominal 2.5 mm)
 Keep the packing material to be used for transporting the balance in the future.
 The weighing pan shape depends on the balance model. The operational procedure is
the same for all the balance models. Unless specially required, the illustration of the
rectangle-shaped weighing pan is used in this manual.

4
3. SAFETY INSTRUCTIONS AND PRECAUTIONS
3-1. Safety Instructions on Intrinsically Safe Structure
 Do not disassemble or modify the balance.
 When determining the installation site, take the following into consideration.
Will explosive gases be generated? How often will they be generated?
Refer to “5. CONFORMING STANDARDS.”
 A portion of the enclosure is non-conducting and, under certain extreme conditions,
may generate an ignition-capable level of electrostatic charges. The user shall
ensure that the equipment is not installed in a location where it may be subjected
to external conditions (such as high-pressure steam) which might cause a build-up
of electrostatic charges on non-conducting surfaces. Additionally, cleaning of the
equipment should be done only with a damp cloth.
 Replace the batteries in non-hazardous areas.
 As a power source, only the four “AA”, “LR6” or “AM3” alkaline 1.5 V batteries
listed below can be used.
DURACELL MN1500, ENERGIZER E91, Panasonic LR6(XJ)
 All four batteries used in a single balance must be of the same type.
 When replacing the batteries, be sure to prevent foreign materials from entering
the battery compartment.
3-2. Precautions on Installation
 Do not install the balance where corrosive gases are present.
 Do not install the balance where the balance will get wet or soaked with water.
 Do not install the balance where the balance will be exposed to direct sunlight,
drafts, vibration, large temperature fluctuations, condensation or magnetism.
 Do not install the balance near air conditioners or heaters.
 Use a solid weighing table to keep the balance level.
 Level the balance by adjusting the leveling feet and confirm it using the bubble spirit level.
 Allow the balance to reach equilibrium with the ambient temperature before use.

5
3-2. Precautions on Power Source
As a power source, only the four “AA”, “LR6” or “AM3” alkaline 1.5 V batteries listed
below can be used.
DURACELL MN1500, ENERGIZER E91, Panasonic LR6(XJ)
 The intrinsically safe performance of the EK-AEP series balance is
guaranteed by using the batteries described above. Do not use other
types of batteries or rechargeable batteries.
 Replace the batteries in non-hazardous areas.
 Do not disassemble the batteries or short-circuit the battery electrodes.
 Install new batteries with terminals (+, -) aligned correctly.
 Do not mix old and new batteries, battery types or batteries of other
manufacturers. It may cause the batteries to leak or burst, or cause the
balance to malfunction.
 When “lb0” appears in the display during use, stop using the balance
immediately and replace all four batteries with new ones.
 The battery life depends on the ambient temperature and the use of the balance.
 Remove the batteries if the balance is not to be used for a long period of
time. The batteries may leak and cause a malfunction.
 Observe the precautions written on the batteries.
 Damage caused by battery leakage will void the warranty.

6
4. SETTING UP
Read “3. SAFETY INSTRUCTIONS AND PRECAUTIONS” carefully and install the
balance as described below.
4-1. Setting up Your Balance
1. Set up the balance as shown below.
EK-300AEP: Install the pan support and the weighing pan on the main unit.
EK-3000AEP/EK-12KAEP: Install the weighing pan on the main unit.
Weighing pan Weighing pan
Pan support
EK-300AEP EK-3000AEP
EK-12KAEP
2. Place the balance on a solid and level surface. Adjust the level of the balance using
the leveling feet. Use the bubble spirit level to confirm. The bubble should be in the
center of the circle.
3. When the balance is installed for the first time, or the balance has been moved,
carry out calibration as described in “9. CALIBRATION.”
4-2. Installing/Replacing the Batteries
As a power source, only the four “AA”, “LR6” or “AM3” alkaline 1.5 V batteries listed
below can be used.
DURACELL MN1500, ENERGIZER E91, Panasonic LR6(XJ)
 The batteries are not provided and must be prepared by the user.
 Install or replace the batteries in non-hazardous areas.
1. Using the Allen wrench provided, remove the
battery cover securing screws.
2. While pressing the battery cover, slide it in the
direction indicated by the arrow and remove
the cover. Remove the old batteries.
3. Insert four new batteries (AA, LR6 or AM3 size)
into the battery compartment, with the terminals
(+, -) aligned correctly.
(Allen bolt M3X6)
Battery cover
securing screws
Battery cover

7
Four batteries (AA, LR6 or AM3 size)
Battery cover
Battery cover
securing screws
4. Attach the battery cover and secure it to the
balance using the battery cover securing
screws.
 During use, the battery indicator changes as the battery voltage decreases, as shown
below.
New “lb0” Replace the batteries.
 When “lb0” appears in the display during use, stop using the balance immediately
and replace all four batteries with new ones.
4-3. When Weighing Objects that are Prone to Static Electricity
 When the ambient humidity is low, insulating
materials such as plastics are prone to static
electricity. Weighing those with a static
charge will result in unstable or incorrect
weight values.
Under such a situation, ground the balance
using the grounding screw hole. Grounding
will reduce the influence of static electricity.
 A grounding wire or a screw is not provided and
must be prepared by the user.
Use an M3 screw with a nominal length of 12
mm or less.
Grounding screw hole

8
5. CONFORMING STANDARDS
5-1. IECEx
Ex ia op is ΙΙB T3 Ga Tamb -25°C to +40°C (IECEx FMG 17.0033X)
Ex: Ex Component
ia: Type of Protection
ΙΙB: Gas Classification
T3: Temperature Class
Ga: Equipment Protection Level
5-2. ATEX
ΙΙ 1G Ex ia op is ΙΙB T3 Ga Tamb -25°C to +40°C (FM17ATEX0096X)
Ex: Ex Component
ia: Type of Protection
ΙΙB: Gas Classification
T3: Temperature Class
Ga: Equipment Protection Level
5-3. FM, FMc (Zone)
Class Ι, Zone 0, AEx / Ex ia op is ΙΙB T3 Tamb -25°C to +40°C
(FM17US0317X/FM17CA0162X)
Class: Permitted Class
Zone: Permitted Zone
Ex: Ex Component
(AEx: American National Standard)
ia: Type of Protection
ΙΙB: Gas Classification
T3: Temperature Class
5-4. FM, FMc (Division)
Intrinsically Safe for Class Ι, Division 1, Groups C, D T3C
Tamb -25°C to +40°C (FM17US0317X/FM17CA0162X)
Intrinsically Safe: Type of Protection
Class: Permitted Class
Division: Permitted Division
Groups: Permitted Groups
T3C: Temperature Class

9
Hazardous location labels on the balance
For IECEx/ATEX
For FM/FMc
Refer to the instruction manual
Ⅱ 1G Ex ia op is ⅡB T3 Ga FM17ATEX 96X
(
(
(
)
Ex ia op is ⅡB T3 Ga IECEx FMG 17. 33X
1WMPD4 352 A
)
)
1-243 Asahi, Kitamoto-shi, Saitama, Japan
Tamb -25℃ to +4 ℃ 28 9
JAPAN Tamb -25℃ to +40℃
Refer to the instruction manual
Class , Zone 0 , AEx / Ex ia op is ⅡB T3
(
IS / / 1 / C,D / T3C
(
FM17CA0162X
FM17US0317X
)
1WMPD4003520A )

10
6. PART NAMES AND FUNCTIONS
LCD
STABL
E
NE
T
ZER
O
Battery indicator ACAI indicator Comparator results
STABLE indicator
NET indicator
ZERO indicator
Weighing
units
ZERO/ON:OFF key
Turns the power ON. Sets the zero point in the weighing mode.
Turns the power OFF when held down while the power is ON.
TARE key
Tares the load on the weighing pan and clears the display to zero.
MODE key
Switches the weighing units.
PRINT key
Sets a unit weight, 100% weight or other setting values.
Outputs the weight value to a printer.
SAMPLE key
Held down to enter the function setting mode.
Counting mode (pcs).....Enters the sample unit weight storing mode.
Percent mode (%) ..........Enters the 100% weight storing mode.
LCD
Weighing pan
(EK-300AEP: round pan)
Leveling
foot
key
MODE key
TARE key
PRINT key
SAMPLE key
Bubble spirit level
Battery compartment
Calibration switch
cover
ZERO
ON:OFF
Bubble spirit level
Grounding screw hole
Optical
connector
Serial number label

11
7. OPERATION
7-1. Turn the Power ON and OFF
Place nothing on the weighing pan.
1. Press the ZERO/ON:OFF key to turn the power ON.
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 turned ON while there is a load beyond this range, the balance will
be tared to zero and the NET and ZERO indicators turn on.
The weighing range is from the zero point to the maximum weighing capacity.
When tared, weighing can be performed up to the weighing capacity minus the
tare value.
2. Press and hold the ZERO/ON:OFF key to turn the power OFF.
Auto power-off function
The auto power-off function automatically turns the power OFF when
zero is displayed for approximately 5 minutes.
Refer to “10-5. Function List” and set the function “poff.”
7-2. LCD Backlight
The LCD backlight will turn on when the weight value changes more than 4d*or any
key operation is performed. When the weight value becomes and stays stable for a
certain period of time, the backlight will automatically turn off. There is also a setting
that the backlight is always on or off. For details, refer to the function setting “ltUp” of
“10-5. Function List.”
* d=readability (scale interval or “division”), refer to “15. SPECIFICATIONS.”
e.g.: “d” for the EK-300AEP is 0.01 g. Therefore, 4d is 0.04 g.
STABL
E
NE
T
ZER
O
Weighing
units

12
Gram
Counting mode
Percent mode
Ounce (avoir)
Pound
Metric carat
Momme
Pennyweight
Grain
Troy ounce
7-3. 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:
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
appear first when the power is turned ON. For details, Refer to “10-4.
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
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.

13
7-4. Selecting a Weighing Unit
Press the MODE 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).
7-5. Basic Operation
1. Select a weighing unit.
2. When the display does not show zero, press the
ZERO/ON:OFF key to set the display to zero.
3. When using a tare (container), place the
container on the pan, and press the TARE
key to set the display to zero.
4. Place the object to be weighed on the pan or
in the container.
Wait for the STABLE indicator to turn on and
read the value.
5. Remove the object from the pan.
 The ZERO/ON:OFF key will zero the
balance if the weight is within ±2% of the
weighing capacity around the power-on zero
point. The ZERO indicator turns on. When
the weight exceeds ±2% of the weighing
capacity, the balance will not be zeroed.
 The TARE key will tare the balance up to the positive value corresponding to the
weighing capacity. In this case the NET and ZERO indicators turn on.
 The weighing range is from the zero point to the maximum weighing capacity.
When tared, weighing can be performed up to the weighing capacity minus the tare
value.
 When the ZERO/ON:OFF key (zero setting) or the TARE key is recognized,
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 performs each function.
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. (Refer to
“9. CALIBRATION.”)
Containe
r
Weighing pan
0.0
NET
ZERO
150.3
NET
STABLE indicato
r
Each pressing switches the
units available in the orde
r
described on the previous
page.
0.0
STABLE indicator
ZERO

14
Samples
(25 pcs)
7-6. Counting Mode (pcs)
The balance weighs the sample pieces and calculates the unit weight. Using the
sample unit weight, the balance counts the number of objects in the sample.
As for the minimum unit weight acceptable, refer to the function setting “Umin” of
“10-5. Function List.” Please note that “Umin 1” and “Umin 2” are for counting light
objects, not for improving counting accuracy.
The sample unit weight is stored in memory even if power to the balance is turned
OFF.
Selecting the counting mode
1. Press the MODE key to select .
(:pieces)
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.
When zero (0) is not displayed to the right side
of the number of samples, as in the figure on
the right, press the ZERO/ON:OFF key to
set it to zero.
4. Place a tare container on the weighing pan, and
press the TARE key. Confirm that zero is
displayed to the right side of the number of
samples.
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 has been set to count objects with
this sample unit weight.
Containe
r
Weighing pan
Confirm the ze
r
o display
Each pressing switches
the number of samples.
To store
0
10 0
25 -
25
25 0
ZERO

15
If the balance judges that the sample weight is
too light to acquire accurate weighing data, it
displays an error prompting the addition of more
samples to the specified number.
Add the specified number of samples and press
the PRINT key.
Refer to “14-2. Error Codes.”
If the balance judges that the sample unit weight
is too light and cannot be stored as the unit
weight, it displays lo and returns to the
previous display.
Even in this situation, the unit weight may be
stored using the function setting “Umin 1” or
“Umin 2.” However, the counting results are for
reference only.
Counting the objects
7. Place the objects to be counted on the pan.
The balance counts the objects using the stored
unit weight and displays the counting result.
Counting mode using the ACAI function
ACAITM (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.
8. If a few more samples are added to the sample
in step 6 after the unit weight is stored, the ACAI
indicator turns on.
Add the same number of samples as displayed.
(The ACAI indicator will not turn on if
overloaded.)
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 the same number of samples as displayed.
ACAI
30
A
CAI indicato
r
50 -
The displayed number
will be stored as the
number of samples.
lo
Objects to be counted

16
7-7. Percent Mode (%)
Displays the weight value in percentage compared to the 100% reference weight.
Selecting the percent mode
1. Press the MODE key to select %. (%: percent)
Storing the 100% reference weight
2. Press the SAMPLE key to enter the 100%
reference weight storing mode.
3. With nothing on the pan, press the
ZERO/ON:OFF key to display 100 0%.
When using a tare (container), after the above
operation, place the container on the pan and
press the TARE key to display 100 0%.
4. Place the sample to be set as the 100%
reference weight on the pan.
5. Press the PRINT key to store the 100%
reference weight. Remove the sample.
If the balance judges that the sample weight is
too light and cannot be stored as the 100%
reference weight, it displays lo and returns
to the previous display.
Reading the percentage
6. Place the object to be compared to the 100%
reference weight on the pan. The displayed
percentage is based on the 100% reference
weight.
Weighing pan
Sample corresponding
to the 100% weight
To store
0.0 %
100 - %
100.0 %
75.8 %
100 0 %
ZERO
Object to be
compared
lo %

17
8. COMPARATOR
The results of the comparison are indicated by HI, OK or LO in the display.
The comparison is as follows:
LO <Lower limit value ≤OK ≤Upper limit value <HI
Comparison mode (Refer to 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 +5d).
Compares stable plus data except those near zero (stable plus data
greater than +5d).
Compares all data except those near zero (all data greater than +5d or
less than -5d).
Compares stable data except those near zero (stable data greater than
+5d or less than -5d).
d = readability (scale interval or “division”).
e.g.: “d” for the EK-300AEP is 0.01 g. Therefore, 5d is 0.05 g.
The readability for the counting mode is 1 piece, for the percent mode, 0.1%.
The upper limit and lower limit values are common to each of the weighing, counting
and percent mode.
Example EK-300AEP EK-3000AEP
Upper limit 001010 10.10 g / 1010 pcs / 101.0% 101.0 g / 1010 pcs / 101.0%
Lower limit 000990 9.90 g / 990 pcs / 99.0% 99.0 g / 990 pcs / 99.0%
8-1. Setting Example
To set “Compares plus data except those near zero
(plus data greater than +5d).”
Selecting a comparison mode
1. Press and hold the SAMPLE key to display
func .
(If the comparison mode is already set, press
the SAMPLE key to proceed to “Entering the
upper and lower limit values.”)
2. Press the PRINT key to display poff X .
(X=0or 1.)
3. Press the SAMPLE key several times to
display Cp X .
(X=0to 6.)
Press and hold
Press
several times
poff 1
func
Cp 0
Press
several times

18
To store
To store
4. Press the TARE key several times to display
Cp 3 .
5. Press the PRINT key to store the setting.
Cp Hi appears after end .
Entering the upper and lower limit values
6. With Cp Hi displayed, press the PRINT key.
Enter the upper limit value using the following keys.
SAMPLE key To select the digit to change
the value (blinking).
TARE key To change the value of the
blinking digit. Hold down the
key to switch the polarity.
(“N” means negative.)
PRINT key To store the value and
proceed to the next step.
MODE key To cancel the operation and
proceed to the next step.
7. With Cp lo displayed, press the PRINT key.
Enter the lower limit value using the following keys.
SAMPLE key To select the digit to change
the value (blinking).
TARE key To change the value of the
blinking digit. Hold down the
key to switch the polarity.
(“N” means negative.)
PRINT key To store the value and
proceed to the next step.
MODE key To cancel the operation and
proceed to the next step.
8. Press the PRINT key. Unit appears
after end .
9. Press the MODE key to return to the
weighing mode.
Returns to
the weighing mode
Set using the
relevant keys
Cp lo
end
Unit
001230
LO
000000
LO
Cp Hi
000000
HI
001234
HI
To store
Set using the
relevant keys
Cp 3