1WMPD4003076

2015.05.11

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 indeath 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 inminor or moderate injury.

This is a hazard alert mark.

NoteThis 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 aredesigned 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 mightcause some interference and under these circumstances the user would be required totake, at his own expense, whatever measures are necessary to eliminate the interference.
(FCC = Federal Communications Commission in the U.S.A.)

Copyright

2015

CONTENTS
1. INTRODUCTION .............................................................................................................3
2. UNPACKING ...................................................................................................................3
3. PRECAUTIONS...............................................................................................................4
3-1. Precautions on Explosion-Proof 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 (Zone)..................................................................................................................8
5-4. FM (Division) .............................................................................................................8
6. PART NAMES AND FUNCTIONS ...................................................................................97. OPERATION..................................................................................................................10
7-1. Turn the Power ON and OFF...................................................................................10
7-2. LCD Backlight..........................................................................................................10
7-3. Units ........................................................................................................................ 11
7-4. Selecting a Weighing Unit........................................................................................127-5. Basic Operation .......................................................................................................12
7-6. Counting Mode (pcs) ...............................................................................................13
7-7. Percent Mode (%)....................................................................................................15
8. COMPARATOR .............................................................................................................168-1. Setting Example ......................................................................................................16
9. CALIBRATION ..............................................................................................................18
9-1. Calibration Using a Weight ......................................................................................18
9-2. Gravity Acceleration Correction ...............................................................................20
10. FUNCTIONS................................................................................................................21
10-1. Key Operation........................................................................................................21
10-2. Entering the Function Setting Mode ......................................................................21
10-3. Setting Example ....................................................................................................22
10-4. Storing Weighing Units ..........................................................................................23
10-5. Function List ..........................................................................................................24
11. OPTION .......................................................................................................................25
12. MAINTENANCE ..........................................................................................................26
12-1. Notes on Maintenance...........................................................................................261

12-2. Error Codes ...........................................................................................................26
13. SPECIFICATIONS .......................................................................................................28
13-1. Specifications.........................................................................................................28
13-2. Option....................................................................................................................28
13-3. External Dimensions..............................................................................................28
13-4. Other Weighing Units.............................................................................................29
GRAVITY ACCELERATION MAP .....................................................................................30

2

1. INTRODUCTION
This manual describes how this balance works and how to get the most out of it interms of performance.
The EK-EP series balances have the following features:
The EK-EP series are intrinsically safe electronic balances complying withinternational standards such as IECEx and ATEX or FM requirements.
The EK-EP series balances can be used in areas where explosive atmospheres arepresent. (For details on the explosion-proof structure, refer to “5. CONFORMING
STANDARDS.”) The EK-EP 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

Pan support

Main unit
EK-300EP

Main unit
EK-3000EP
EK-12KEP

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 therectangle-shaped weighing pan is used in this manual.

3

3. PRECAUTIONS
3-1. Precautions on Explosion-Proof 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.”
The enclosure of the balance contains accessible metal parts and could besusceptible to electrostatic charges that could be a source of ignition. The user
must consider a value of 170pF capacitance when considering suitability for use.
Refer to IEC TS60079.32-1 for guidance.
Part of the enclosure is constructed of plastic. To prevent the risk of electrostatic
sparking, clean the non-metallic surface 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)
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.

4

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 explosion-proof performance of the EK-EP series balance isguaranteed by using the batteries described above. Do not use othertypes 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 othermanufacturers. It may cause the batteries to leak or burst, or cause thebalance 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 oftime. The batteries may leak and cause a malfunction.
Observe the precautions written on the batteries.
Damage caused by battery leakage will void the warranty.

5

4. SETTING UP
Read “3. PRECAUTIONS” carefully and install the balance as described below.

4-1. Setting up Your Balance
1. Set up the balance as shown below.
EK-300EP: Install the pan support and the weighing pan on the main unit.
EK-3000EP/EK-12KEP: Install the weighing pan on the main unit.
Weighing pan

Weighing pan

Pan support

EK-300EP

EK-3000EP
EK-12KEP

2. Place the balance on a solid and level surface. Adjust the level of the balance using
the leveling feet. Use the spirit level to confirm. The bubble should be in the centerof 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 thebattery 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.

Battery coverBattery coversecuring screws(Allen bolt M3X6)

6

Four batteries (AA, LR6 or AM3 size)

Battery coverBattery coversecuring screws

4. Attach the battery cover and secure it to thebalance 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 balanceusing the grounding screw hole. Grounding
will reduce the influence of static electricity.
A grounding wire or a screw is not provided andmust be prepared by the user.
Use an M3 screw with a nominal length of 12mm or less.

7

Grounding screw hole

5. CONFORMING STANDARDS
5-1. IECEx
Ex ia B T3 Ga
Ex:
ia:
B:
T3:
Ga:

Ex Component
Type of Protection
Gas Classification
Temperature Class
Equipment Protection Level

5-2. ATEX
 1G Ex ia B T3 Ga
Ex:
ia:
B:
T3:
Ga:

Ex Component
Type of Protection
Gas Classification
Temperature Class
Equipment Protection Level

5-3. FM, FMc (Zone)
Class , Zone 0, AEx / Ex ia B T3
Class:
Zone:
Ex:
(AEx:
ia:
B:
T3:

Permitted Class
Permitted Zone
Ex Component
American National Standard)Type of Protection
Gas Classification
Temperature Class

5-4. FM, FMc (Division)
Intrinsically Safe for Class , Division 1, Groups C, D T3C
Intrinsically Safe: Type of Protection
Class:
Permitted Class
Division: Permitted Division
Groups: Permitted Groups
T3C:
Temperature Class8

6. PART NAMES AND FUNCTIONS
Weighing pan(EK-300EP: round pan)
Bubble spirit level

SAMPLE key
LCD

Rating plate
ZERO
ON:OFF key
Battery compartment
Bubble spirit level

MODE key
TARE key
ENTER key

Leveling
footCalibration switch
cover

Grounding screw hole

LCD
Battery indicator
STABLE indicator
NET indicatorZERO indicator

ACAI indicator

Comparator results

STABLE

Weighing
units

NET
ZERO

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.
ENTER key
Sets a unit weight, 100% weight or other setting values.
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.

9

7. OPERATION
7-1. Turn the Power ON and OFF
 Place nothing on the weighing pan.
1. Press theZERO/ON:OFF

key to turn the power ON.

STABLE

Weighing
units

NET
ZERO

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 thecalibrated 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 thetare value.
2. Press and hold theZERO/ON:OFF

key to turn the power OFF.

 Auto power-off function
The auto power-off function automatically turns the power OFF whenzero 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 acertain period of time, the backlight will automatically turn off. There is also a settingthat the backlight is always on or off. For details, refer to the function setting “ltUp” of“10-5. Function List.”* d=minimum display division, refer to “13. SPECIFICATIONS.”
e.g.: “d” for the EK-300EP is 0.01 g. Therefore, 4d is 0.04 g.

10

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:
Pound

Ounce (avoir)

Troy ounce
Metric carat

Percent mode

Momme

Counting mode

Pennyweight

Gram

Grain
NewtonDensity(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.
 NoteIt is possible to store only the units that will be actually used fromthe units available. It is also possible to specify the unit that willappear first when the power is turned ON. For details, Refer to “8-4.
Storing Weighing Units.”
Conversion table
Units
oz
lb
ozt
ct
mom
dwt
GN
t
tl
tl
tl

Name
Ounce (avoir)
Pound (UK)
Troy ounce
Metric caratmomme
Pennyweight
Grain (UK)tolatael (Hong Kong general, Singapore)
tael (Hong Kong jewelry)tael (Taiwan)

Conversion to gram028.349523125 g
453.59237 g
031.1034768 g
000.2 g003.75 g
001.55517384 g
000.06479891 g
011.6638038 g
037.7994 g
037.4290 g
037.5 g “Newton” is the value calculated by “(g value) 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.

11

7-4. Selecting a Weighing Unit
Press theMODE

key to select a unit.

Each pressing switches theunits available in the order
described on the previous
page.

The following sections are a description of thethree common units: g (gram mode), pcs (countingmode), and % (percent mode).
ZERO

0.0
STABLE indicator

7-5. Basic Operation

Container

1. Select a weighing unit.
2. When the display does not show zero, press theZERO/ON:OFF key to set the display to zero.

Weighing pan

3. When using a tare (container), place thecontainer on the pan, and press the TARE
key to set the display to zero.
4. Place the object to be weighed on the pan orin the container.
Wait for the STABLE indicator to turn on andread the value.

NET
ZERO

0.0

5. Remove the object from the pan.
The
ZERO/ON:OFF
key will zero thebalance if the weight is within ±2% of theweighing capacity around the power-on zero NET
turns on. Whenpoint. The ZERO indicator
the weight exceeds ±2% of the weighing
STABLE indicator
capacity, the balance will not be zeroed.
The TARE key will tare the balance up to the positive value corresponding to theweighing 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 tarevalue.
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.

150.3

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.”)12

7-6. Counting Mode (pcs)
The balance weighs the sample pieces and calculates the unit weight. Using thesample 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 turnedOFF.
Selecting the counting mode
1. Press the MODE key to select.
(:pieces)0

Storing the sample unit
2. Press the SAMPLE key to enter the sample
unit weight storing mode.

10 0

3. To select the number of samples, press the
1SAMPLE key. It may be set to 5, 10, 25, 50,
or 100.

Each pressing switches
the number of samples.

 When zero (0) is not displayed to the right sideof the number of samples, as in the figure on
the right, press the ZERO/ON:OFF key to
set it to zero.

25 Container

4. Place a tare container on the weighing pan, andpress the TARE key. Confirm that zero isdisplayed to the right side of the number ofsamples.

Weighing pan

Confirm the zero display
ZERO

5. Place the number of samples specified on thepan. In this example, 25 pieces.
6. Press the ENTER key to calculate and store
the unit weight. Remove the sample.
The balance has been set to count objects withthis sample unit weight.

13

25 0
Samples(25 pcs)

To store25

 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 ENTER key.
Refer to “12-2. 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 theprevious 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 forreference only.

50 The displayed number
will be stored as thenumber of samples.

loObjects to be counted

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 theaccuracy 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.)

ACAI indicator
ACAI

30

9. The balance re-calculates the unit weight while the ACAI indicator is blinking. Do nottouch 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 theabove operation is performed, a more accurate unit weight will be obtained. There isno definite upper limit of ACAI range for the number of samples exceeding 100. Try
to add the same number of samples as displayed.

14

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.

0.0

%

100 -

%

100 0

%

3. With nothing on the pan, press theZERO/ON:OFF key to display 100 0%.
When using a tare (container), after the above
operation, place the container on the pan andpress the TARE key to display 100 0%.

ZERO

Weighing pan
4. Place the sample to be set as the 100%
reference weight on the pan.
Sample corresponding
to the 100% weight
5. Press the ENTER key to store the 100%
reference weight. Remove the sample.

To store

100.0
 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 displayedpercentage is based on the 100% reference
weight.

lo%

Object to becompared

75.8

15

%

%

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 orless than -5d).
 Compares stable data except those near zero (stable data greater than
+5d or less than -5d).
d = minimum display division.
e.g.: “d” for the EK-300EP is 0.01 g. Therefore, 5d is 0.05 g.
The minimum display 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.
ExampleUpper limit 001010
Lower limit 000990

EK-300EP
EK-3000EP
10.10 g / 1010 pcs / 101.0% 101.0 g / 1010 pcs / 101.0%
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 theupper and lower limit values.”)
2. Press the ENTER(X=0 or 1.)

key to display

3. Press the SAMPLE
display Cp
X.
(X=0 to 6.)

Press and holdfunc

poff X .

poff 1
key several times to

Pressseveral times

Cp
16

0

4. Press the TARE
Cp
3.

Press
several times

key several times to display

5. Press the ENER key to store the setting.
Cp Hi
appears after end.

Cp

3
To storeEntering the upper and lower limit values
6. With Cp Hi displayed, press the ENTER key.
Enter the upper limit value using the following keys.
SAMPLE
TARE

key

ENTER
MODE

key

key
key

To select the digit to change
the value (blinking).
To change the value of theblinking digit. Hold down the
key to switch the polarity.
(“N” means negative.)
To store the value andproceed to the next step.
To cancel the operation andproceed to the next step.

Cp Hi
HI

000000Set using therelevant keys
HI001234To store

7. With Cp lo displayed, press the ENTER key.
Enter the lower limit value using the following keys.
SAMPLE
TARE

key

key

To select the digit to change
the value (blinking).
To change the value of theblinking digit. Hold down the
key to switch the polarity.
(“N” means negative.)

ENTER

key

To store the value andproceed to the next step.

MODE

key

To cancel the operation andproceed to the next step.

8. Press theafter end

ENTER.

9. Press theMODEweighing mode.

key.

Unit

Cp lo
LO

000000Set using therelevant keys
LO001230appears

To storeend
key to return to the

Unit
Returns to
the weighing mode17

9. CALIBRATIONThis function adjusts the balance for accurate weighing.
Perform calibration in the following cases.
 When the balance is first used.
 When the balance has been moved.
 When the ambient environment has changed.
 For regular calibration.

Press and slide the calibration
switch cover down.

Calibration (CAL)
switch9-1. Calibration Using a Weight Prepare a calibration weight (sold separately) in advance.
A calibration weight with a value of 1/2 of the weighing capacity or more isrecommended.
1. Warm up the balance for at least half an hourwith nothing on the pan.

Press and holdthe CAL switch.

2. Press and hold the calibration (CAL) switch until
Cal
appears, and release the switch.

Cal

3. The balance displays

Cal 0

Release the CAL switch.

.

To change the calibration weight value, proceed
to step 4.

Cal 0

To use the calibration weight value in thebalance memory, proceed to step 5.
4. Press the
SAMPLE
key. The balancedisplays the calibration weight value in “gram”
that is stored in the balance. Use the following
keys to change the value.
SAMPLE
TARE

key

key

To select the digit to change
the value (blinking).
To change the value of theblinking digit

ENTER

key

To store the value andproceed to step 5.

UNITS

key

To cancel the operation andreturn to step 3.

18

03000.0
Set the weight using
the relevant keys.

Cal 0

Weighingpan

5. With Cal 0 displayed, press the ENTER key
to calibrate the zero point. Do not touch the panduring zero calibration.
When zero calibration has been completed, thebalance displays the calibration weight value.

With nothing
on the pan

If span calibration is not to be performed, press the
MODE key or CAL switch to return to theweighing mode.

To store

Cal 0
6. Place a calibration weight with the same value
as displayed on the pan. Press the ENTER
key to perform span calibration. Do not touch
the pan during span calibration.

2000.0Calibration
weightTo store

2000.07.

end
appears.
Remove the weight from the pan.
Press the CAL switch or MODE key to returnto the weighing mode.

end
Returns to
the weighing mode

 NoteThe value set in step 4 is stored in memory even after the power isturned OFF.
If the balance is to be moved to other places, set the gravity
acceleration value of the area where calibration using a weight is tobe performed, and calibrate the balance according to the procedure
above. Refer to the next section to set the gravity acceleration value.

199-2. Gravity Acceleration Correction
When the balance is first used or has been moved to a different place, it should becalibrated using a calibration weight.
But if a calibration weight is not available, the gravity acceleration correction willcompensate the balance. Change the gravity acceleration value of the balance to thevalue of the area where the balance will be used. Refer to the gravity acceleration map
appended to the end of this manual.
 NoteGravity acceleration correction is not required when the balance iscalibrated using a calibration weight at the place where the balance
is to be used.

1. Press and hold the calibration (CAL) switch until
Cal
appears, and release the switch.
2. The balance displays

Cal 0

Press and holdthe CAL switch.

Cal.

Release the CAL switch.
3. Press the TARE key.
The balance displays the gravity acceleration
value stored in the balance.
Use the following keys to change the value.
SAMPLE
TARE

key

key

Cal 0

To select the digit to change
the value (blinking).
To change the value of theblinking digit.

9.7985
Set the value using
the relevant keys.

ENTER

key

To store the value andproceed to step 4.

UNITS

key

To cancel the operation andreturn to step 2.

4. Press the ENTER key to store the value.
Cal 0
appears.
5. If it is necessary to calibrate the balance using acalibration weight, proceed to step 3 of 8-1.
6. To finish the setting, press the MODE key.
The balance returns to the weighing mode.

20

To store

Cal 0
Returns to
the weighing mode

10. FUNCTIONS
10-1. Key Operation
Cancels the operation and turns the balance
OFF.
Item key
Selects a class and an item.
In the weighing mode, press and hold the key
to enter the function setting mode.
Enter key
Proceeds to the selected class.
Stores the settings per class and proceeds tothe next class.
Parameter key
Selects a parameter.
Cancel key
Cancels the operation, and proceeds to thenext class or returns to the weighing mode.

10-2. Entering the Function Setting ModeIn the weighing mode, press and hold the
SAMPLE key to enter the function setting
mode and display func.
Each time the SAMPLE key is pressed, theclasses appear one after another.

Press and holdfunc
Each pressing
switches theclass

For details on functions, refer to “10-5. Function
List.”Cp Hi•••
Set using therelevant keys

21

10-3. Setting Example
To set the auto power-off function to “Disabled”, and the ACAI function to “Disabled.”
1. Press and hold thefunc.

SAMPLE

key to display
Press and holdfunc
2. Press the

ENTER

key to displaypoff 1 .

poff 1
3. Press theTARE

key to display

4. Press the SAMPLE
display aCai 1 .

5. Press theTAREpoff 0 .

key several times to

Each pressing
switches theparameters

poff 0To confirm

key to selectaCai 0 .

aCai 1Each pressing
switches theparameters

6. Press the ENTER key to store the parameter.
Cp Hi
appears after end.

aCai 0To storeend
7. Press theMODEweighing mode.

key to return to the

Cp Hi
Returns to
the weighing mode22

10-4. Storing Weighing Units
It is possible to store the weighing units that will actually be used from the units
available. For the units available, Refer to “7-3. Units.”
Select and store the weighing units as described below:
1. Press and hold thefunc.

SAMPLE

key to display
Press and holdfunc
2. Press the SAMPLE
Unit.

key several times to display

Pressseveral times

Unit
3. Press the

ENTER

key.

Unit
4. Press theunit.

SAMPLE

key to select a weighing
Each pressing switches
the units available in theorder described in 7-3.

Unit
5. Press the
unit.

TARE

key to confirm the weighing
To confirm

6. Repeat steps 4 and 5 to confirm all the weighing
units to be used.
7. Press the ENTER key to store the confirmed
weighing units in memory.
func
appears after end.

To store

end
func

8. Press theMODEweighing mode.

key to return to the NoteWhen the balance is turned ON, it starts
with the unit that was confirmed first in
step 5.
23

Returns to
the weighing mode

10-5. Function List
Class
func

CpHi
Cplo
Unit

Item

Parameter
Description
Turns the power
Auto power-off disabledpoff
0
OFF automaticallyAuto power-off
 1
Auto power-off enabled
Good environment/
Fast / sensitive
Cond0
Response
Target weighing
1
 2
3
Priority on stability
Slow / stable
4
Stable when within ± 0.5d/0.5 s Conditions to turnst-b
0
the STABLE
Stability band 1
Stable when within ± 1d/0.5 s
indicator on
width
Stable when within ± 2d/0.5 s
2Tracks the zero
Disabled
trc
0
drift
Zero tracking
 1Enabled
Decimal point
 0
Point (.)
pnt
formatDecimal point
Comma (,)
1
Conditions to 0Comparator function disabledCp
compare.
Comparison mode
Compares all data1
d = minimum
Compares all stable data2
display division
Compares plus data > +5d
3Compare stable plus data > +5d
4Compares data > +5d or < -5d5Compares stable data > +5d or < -5d
6ACAI disabledaCai
0
0: no additional
ACAI function
samples 1
ACAI enabled
d = minimum
Umin 0Unit weight  1d
display division
Minimum unit
1
Unit weight  1/10d()
weight acceptable
2
Total sample weight  5d *The number of 0
10 pcssmpl
samples displayed
Number of samples
25 pcs1
first when entered
50 pcs2
into the unit weight
100 pcs
3
storing mode
5 pcs
4Conditions to turn the
Always off
ltUp0
LCD Backlight
Turns off 3 seconds after stable LCD backlight on/ off.
1
control
Turns off 10 seconds after stable Weight change or2
 3
Turns off 30 seconds after stable key operation
Stable = STABLE
Turns off 60 seconds after stable indicator on
4
Always on
5
Refer toComparator upper limit
Sets the upper limit value“8. COMPARATOR”
Comparator lower limit
Sets the lower limit value
Weighing units to be displayed Sets units to be displayed
Refer to “10-4. Storing
Weighing Units”

 Factory setting( )* Even if the weight display is “5d”, the sample weight may not be accepted. This isbecause the weight display data is rounded off internally.

24

11. OPTIONAs an option, a carrying case (EJ-12) is available for carrying the balance by hand.
Please note that the balances are precision equipment and they, even placed in thecase, will not be able to withstand excessive shock, such as being dropped.
Therefore, use much care when carrying the balance.

2512. MAINTENANCE
12-1. Notes on MaintenanceDo not disassemble the balance. .
Use the original packing material for transportation.
Do not use organic solvents to clean the balance. Use a lint free clothmoistened with warm water and a mild detergent.

12-2. Error Codes
Overload error

eerror5

An object beyond the balance capacity has been placedon the pan.
Remove the object from the pan.
The balance has detected an erroneous loading
condition.
Remove the object from the pan or take other necessary
measures to set the balance condition to normal.

Range exceeding error-eThe balance has detected an excessive upward force.
Check if there is anything trapped under the edge of theweighing pan. There is a possibility that the weighing
sensor itself may have a failure.

Unit weight errorlo

The sample weight is too light to be used as the unit
weight in the counting mode or 100% reference weight in
the percent mode.

Sample quantity error

10 25 50 100 -When the total sample weight is light and the counting
error could become large, the balance prompts you to
use larger number of samples.
Place the displayed number of samples on the pan andpress the ENTER key to store the unit weight.
Note: Pressing the ENTER key without adding
samples is possible, but that will reducecounting accuracy.
When starting from the 100 samples, 100 may be displayed if the sample weight is light.
Under the situation, press the ENTER key
without adding any samples.
When the function setting “aCai 0” (ACAIdisabled) or “Umin 2” is selected, this error will
not appear.
26

CAL errors

Cal e-Cal eCalibration has been canceled because the calibration
weight is too heavy.
Calibration has been canceled because the calibration
weight is too light.
Check the weighing pan and the calibration weight.
To return to the weighing mode, press the MODE key.

Low battery error

lb0

The batteries are exhausted.
Stop using the balance immediately and replace all fourbatteries with new ones

Stability error

error1

The weight value is not stable and the balance cannot
perform the operation when keys such as
ZERO/ON:OFF or TARE are pressed.
Prevent vibration and drafts from influencing the balance.
Press the MODE key to return to the weighing mode.

Internal error (# = 2 to 6)

error#The balance has detected an error in the internal
processing.
Remove the object from the pan. Turn the power OFF,and ON again.
If the error persists, request service.

If you cannot resolve an error or other errors occur, request service from thestore where you purchased the balance or from your local A&D dealer.

27

13. SPECIFICATIONS
13-1. Specifications
MODEL
Explosion-proof structure
Ambient temperature range
Weighing capacity
Minimum display “d”
Repeatability(Std. deviation)
Linearity
Sensitivity drift
Number of samples
Maximum count *Minimum unit weight *Minimum % display
Minimum 100 % weight
Display
Display update
Operating temperature andhumidity range
Power source

EK-300EP

EK-3000EP
EK-12KEP
Ex ia IIB T3-25°C to 40°C / -13°F to 104°F
300 g
3000 g
12 kg
0.01 g0.1 g
1g
0.01 g0.1 g

1g±0.02 g±0.2 g±1 g±20 ppm / °C (10°C to 30°C / 50°F to 86°F)
5, 10, 25, 50 or 100 pieces
30,000 pcs
30,000 pcs
12,000 pcs
0.01 g
0.1 g
1g
0.1 %
1g
10g
100 g
7 segment LCD with backlight (Character height 16mm)
Approx. 10 times per second
0°C to 40°C / 32°F to 104°F,
Less than 85% R.H. (non-condensing)
6.0 VDC, Four “AA”, “LR6” or “AM3” batteries
Operating hours: Approx. 250 hours with backlight off
110 mm ø
133 x 170 mm

Weighing pan size
WeightApprox. 1.2 kg(Excluding batteries)
Calibration weight300 g(factory setting)* In case of “Umin 0” (factory setting)Approx. 1.5 kg

Approx. 1.5 kg

3000 g

10 kg

13-2. Option
EJ-12

Carrying case

133

128.5

128.

218
200

218
200

71.5

71.5

13-3. External Dimensions

190

Φ110

170

54

53

190

EK-300EP

EK-3000EP / EK-12KEP
28

Unit: mm

13-4. Other Weighing Units
MODEL
Weighing capacityoz
Minimum display
Weighing capacitylb
Minimum display
Weighing capacity
ozt
Minimum display
Weighing capacity
ct
Minimum display
Weighing capacitymom
Minimum display
Weighing capacity
dwt
Minimum display
Weighing capacity
GN
Minimum display
Weighing capacity
tola**
Minimum display
Weighing capacitytl (HG)**
Minimum display
Weighing capacitytl (HJ)**
Minimum display
Weighing capacity
tl (T)**
Minimum display

EK-300EP
10.9350.001
0.68340.00019.967
0.001
1500.00
0.05
82.6650.005
199.330.01
4784.00.2
26.5780.001
8.20100.00058.28250.00058.26650.0005

EK-3000EP
109.35
0.01
6.834
0.001
99.67
0.01


826.650.05
1993.30.1
47840
2265.780.01
82.0100.005
82.8250.005
82.6650.005

EK-12KEP
423.3
0.1
26.46
0.01
385.8
0.1


3200
0.5
7716
1


1028.80.1
317.45
0.05
320.6
0.05
320
0.05

**The unit “tola” and three kinds of “tl” are for special versions only and one ofthem will be available.
tl (HG): Hong Kong General / Singapore taeltl (HJ): Hong Kong Jewelry tael
tl (T): Taiwan tael

29

GRAVITY ACCELERATION MAP
Values of Gravity at Various Locations
Amsterdam
AthensAuckland NZ
BangkokBirmingham
Brussels
Buenos Aires
Calcutta
Cape Town
ChicagoCopenhagen
CyprusDjakarta
Frankfurt
Glasgow
HavanaHelsinki
KuwaitLisbonLondon (Greenwich)
Los Angeles
Madrid

9.813 m/s2
9.807 m/s2
9.799 m/s2
9.783 m/s2
9.813 m/s2
9.811 m/s2
9.797 m/s2
9.788 m/s2
9.796 m/s2
9.803 m/s2
9.815 m/s2
9.797 m/s2
9.781 m/s2
9.810 m/s2
9.816 m/s2
9.788 m/s2
9.819 m/s2
9.793 m/s2
9.801 m/s2
9.812 m/s2
9.796 m/s2
9.800 m/s2

ManilaMelbourne
Mexico City
Milan
New York
Oslo
OttawaParis
Rio de Janeiro
Rome
San Francisco
Singapore
Stockholm
SydneyTaichung
TainanTaipeiTokyo
Vancouver, BC
Washington DC
Wellington NZ
Zurich30

9.784 m/s2
9.800 m/s2
9.779 m/s2
9.806 m/s2
9.802 m/s2
9.819 m/s2
9.806 m/s2
9.809 m/s2
9.788 m/s2
9.803 m/s2
9.800 m/s2
9.781 m/s2
9.818 m/s2
9.797 m/s2
9.789 m/s2
9.788 m/s2
9.790 m/s2
9.798 m/s2
9.809 m/s2
9.801 m/s2
9.803 m/s2
9.807 m/s2

World Map

31

MEMO

32

13

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Telephone: [81] (3) 5391-6132
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