A&D EK-i Series User manual

x
WM:PD4000465

© 2002 A&D Company Ltd. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated
into any language in any form by any means without the written permission of A&D
Company Ltd.
The contents of this manual and the specifications of the instrument covered by this
manual are subject to change for improvement without notice.
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 Class A computing device pursuant to Subpart J of Part 15 of FCC rules. These
rules are designed to provide reasonable protection against interference when the
equipment is operated in a commercial environment. If this unit is operated in a
residential area it may cause some interference and under these circumstances the
user would be required to take, at his own expense, whatever measures are
necessary to eliminate the interference.
(FCC = Federal Communications Commission in the U.S.A.)
Note
Under some ambient electromagnetic conditions, this equipment may be affected by
the electromagnetic interference.
This is a hazard alert mark.

1
CONTENTS
1. INTRODUCTION ..........................................................................................................................3
2. UNPACKING.................................................................................................................................3
3. PART NAMESAND FUNCTIONS.............................................................................................4
4. SETTING UP .................................................................................................................................5
4-1. Setting up your balance .............................................................................................................. 5
4-2. Power source.............................................................................................................................. 5
5. OPERATION ..................................................................................................................................6
5-1. Turn the power ON and OFF....................................................................................................... 6
5-2. LCD backlight ............................................................................................................................. 6
5-3. Units ........................................................................................................................................... 7
5-4. Selecting a weighing unit ............................................................................................................ 8
5-5. Basic operation........................................................................................................................... 8
5-6. Weighing range for the EW-iseries ............................................................................................. 9
5-7. Counting mode (pcs)................................................................................................................. 10
5-8. 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.................................................................................................. 15
8. FUNCTIONS................................................................................................................................16
8-1. Key operation............................................................................................................................ 17
8-2. Entering the function setting mode............................................................................................ 17
8-3. Setting example ........................................................................................................................ 17
8-4. Storing weighing units ............................................................................................................... 18
8-5. Function list .............................................................................................................................. 19
9. RS-232C SERIAL INTERFACE...............................................................................................21
9-1. Interface specifications .............................................................................................................. 22
9-2. Dat a format ............................................................................................................................... 22
9-3. Data output mode ..................................................................................................................... 23
9-4. Command mode ....................................................................................................................... 24
10. ID NUMBER AND GLP ...........................................................................................................24
10-1. Setting the ID number ............................................................................................................. 25
10-2. Output example ...................................................................................................................... 25

2
10-3. Output procedure for the “Calibration report” ........................................................................... 27
10-4. Output procedure for the “Calibration test report” .................................................................... 28
10-5. Output procedure for the “Start block” and “End block”............................................................ 30
11. OPTIONS ...................................................................................................................................31
11-1. OP -04 Comparator relay output and buzzer ............................................................................ 32
11-2. OP -07 Underhook assembly ................................................................................................... 33
11-3. OP -09 Rechargeable battery pack (Ni -MH) ............................................................................. 33
11-4. OP -12 Carrying case............................................................................................................... 34
12. MAINTENANCE .......................................................................................................................34
12-1. Notes on maintenance............................................................................................................ 34
12-2 Error codes .............................................................................................................................. 35
13. SPECIFICATIONS....................................................................................................................36
13-1. EK-iseries .............................................................................................................................. 36
13-2. EW-iseries ............................................................................................................................. 37
13-3. Other weighing units ............................................................................................................... 38
13-4. Dimensions ............................................................................................................................. 39
GRAVITY ACCELERATION MAP................................................................................................39

3
1. INTRODUCTION
This manual describes how this balance works and how to get the most out of
it in terms of performance.
EK-iand EW-iseries balances have the following features:
qThe EK-iseries are high resolution type electronic balances having a resolution of
1/6,000 ~ 1/30,000.
qThe EW-iseries are triple range balances and each range has a resolution of
1/3,000.
qBoth series have similar functions like a counting function, % function and a
comparator function.
qThe backlight LCD will help with use in a dimly lighted place.
qThe standard RS-232C serial interface can be connected with a printer or
personal computer.
qUsing a serial interface, Good Laboratory Practice (GLP) data can be obtained.
qWith the optional rechargeable battery pack (OP-09), the balance can be used for
cordless operation.
2. UNPACKING
When unpacking, check whether all of the following items are inc luded:

4
3. PART NAMES AND FUNCTIONS
Turns the power on or off.
Held down to enter the function
setting mode.
Weighing mode (EW-ionly):
Changes the weighing range
(when r ng 0 is selected).
pcs mode:
Enters the sample unit weight
storing mode.
% mode:
Enters the 100% weight
storing mode.
Outputs the weight value to
printer.
Switches the weighing unit
(the weighing mode).
Clears the display to zero.

5
4. SETTING UP
4-1. Setting up your balance
1. Place the weighing pan on the main unit as shown on the previous page.
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:
qDo not install the balance in locations that are subject to excessive dust, breezes,
vibration, large temperature fluctuations, condensation, or that may have
magnetic fields.
qDo not install the balance on a surface that is soft or that may cause the balance
level to shift.
qDo not install the balance in direct sunshine.
qDo not install the balance near heaters or air conditioners.
qDo not use an unstable AC power source.
qDo not install the balance in a place where combustible or corrosive gases may exist.
qAllow the balance to reach equilibrium with the ambient temperature before use.
qSwitch the power ON at least half an hour before use so that the balance can
warm up.
qWhen 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 the rechargeable battery pack (OP-09:
Optional item) is available.
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 EK/EW-i.
When using the rechargeable battery pack (OP-09)
Insert the rechargeable battery pack into the main unit.
The balance can be used continuously for about 9 hours using the battery pack.
qq If “Lb0”is displayed when using the battery pack, immediately stop
using it, and recharge the battery pack or use the AC adapter.
qq See “11-3 OP-09 Rechargeable battery pack”, for instructions to
install and charge the battery pack.
qq Be sure to charge the battery pack before using it for the first time.

6
5. OPERATION
5-1. Turn the power ON and OFF
1. Press the ON/OFF key to turn the power ON.
All of the symbols are displayed as shown above.
(About units: Only the units available will be displayed.)
The display turns off except for a weighing unit and the decimal point.
The balance waits for the weighing data to become stable, and zero will be
displayed with the ZERO mark (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 mark and the ZERO mark turn on.
2. Pressing the ON/OFF key again, and the power will be switched OFF.
qq Auto-power off function
It is possible to have the power automatically switched OFF, if zero is
displayed for approximately 5 minutes. See “8-5. Function list”and
set the function “pof fpof f ”.
5-2. LCD backlight
The LCD backlight will turn on when the weight value changes more than 4 display
digits or any key operation is done. When the weight data becomes and stays stable
for some moment, 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 “l t up”of
“Function list”.

7
5-3. Units
The most common unit of weight used around the world is the gram, but there is often
aneed 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, while skipping the units that are not available.
Some units are not available for higher or lower capacity models. For details, see “13.
SPECIFICATIONS”
qq 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 display unit that
will be shown first when the power is switched ON. For details, see
“8-4. Storin g weighing units”.
Conversion table
Units Name Conversion to gram
oz Ounce (avoir) 28.349523125 g
lb Pound (UK) 453.59237 g
ozt Troy ounce 31.1034768 g
ct Metric carat 0.2 g
mom momme 3.75 g
dwt Pennyweight 1.55517384 g
GN Grain (UK) 0.06479891 g
tl tael (Hong Kong general, Singapore) 37.7994 g
qq Note
The unit “tl (tael)” is for special versions only.
Gram
Counting mode
Percent mode
Ounce (avoir)
Pound
Troy ounce
Metric carat
Momme
Pennyweight
Grain
Tael

8
5-4. 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).
5-5. Basic operation
1. Select a weighing unit.
2. When the display doesn’t 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 set the display to zero.
4. Place the object to be weighed on the pan or in
the container.
Wait for the stability mark ( ¡) to be displayed
and read the value.
5. Remove the object from the pan.
qq Note
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 mark turns on. When the
weight exceeds +2% of the weighing
capacity, it will be subtracted to zero as a
tare weight. In this case the ZERO and NET
marks turn on.
Precautions during operation
qq Make sure that the stability mark is on whenever reading or storing a value.
qq Do not press the keys with a sharp object such as a pencil.
qq Do not apply a shock or a load to the pan that is beyond the weighing
capacity.
qq Keep the balance free from foreign objects such as dust or liquid.
qq Calibrate the balance periodically to keep weighing accuracy. (See ”7.
CALIBRATION”.)
Stability mark
Container
Weighing pan
0.0
NET
ZERO
Each pressing switches the
units available in the order
desc
ribed on the previous
page.
0.0
ZERO
150.3
NET
Stability mark

9
5-6. Weighing range for the EW-iseries
qThe EW-iseries have three weighing ranges, and the display shows which range
the weight value belongs to with the mark R1, R2 or R3.
qThere is a function setting to select how the weighing range changes.
qSelect from automatic range (r ng 1), manual range (r ng 0) or fixed range (r ng 2
to 4).
Operation
Function setting Operation
r ng 1
Automatic range
qWhen the weight value exceeds the maximum value of
the range, the weighing range changes automatically
from a lower to a higher weighing range.
qWhen the re is nothing on the weighing pan and the
display shows zero with the ZERO mark, the weighing
range changes from a higher to the lowest range.
qWhen the RE-ZERO key is pressed in a higher range,
the balance will be tared and zeroed and the weighing
range becomes the lowest range.
r ng 0
Manual range
qPress the SAMPLE key when the display shows a
weight value (neither counting nor % display). The
weighing range changes to a higher range at any load.
qPress the SAMPLE key to change from a higher to the
lowest range, when the re is nothing on the weighing pan
and the display shows zero with the ZERO mark.
qWhen the RE-ZERO key is pressed in a higher range,
the balance will be tared and zeroed and the weighing
range becomes the lowest range. If the weight of the
object is not more than 2% of the weighing capacity, the
1RE-ZERO key doesn’t tare, but zeroes the balance and
the weighing range doesn’t change.
Press the SAMPLE key to change the weighing range
at zero display.
r ng 2 to 4
Fixed range
qThe weighing range is fixed. Set the function to the
weighing range according to the purpose.

10
5-7. Counting mode (pcs)
Determines the number of objects in a sample. Calculates the reading, using the basic
sample unit weight,and determines how many pieces are contained.
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
SAMPLE 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
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.
8. If a few more samples are added, the ACAI
mark is displayed. (To prevent an error, add
three or more. The ACAI mark will not be
displayed if overloaded.)
0
1 0 -
25 -
Container
Weighing pan
25
ACAI
25
ACAI mark
Samples
(25 pcs)
Each pressing
switches the
number of
samples.
Confirm the display
25 0
ZERO
To store

11
To store
9. The balance re-calculates the unit weight while the ACAI mark is blinking. Do not
touch the balance or samples on the pan until the ACAI mark turns off.
10. Counting accuracy is improved when the ACAI mark 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 similar number of samples as displayed.
5-8. Percent mode (%)
Displays the weighing value in percentage compared to the reference (100%) weight.
Selecting the percent mode
1. Press the MODE 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.
Object to be
compared
0.0 %
100 -%
100.0 %
75.8 %
100 0 %
ZERO
Weighing pan
Sample
corresponding
to the 100%
weight

12
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”):
qNo comparison (comparator function disabled).
qCompares all data.
qCompares all stable data.
qCompares plus data greater than +4d.
qCompares stable plus data greater than +4d.
qCompares all data greater than +4d or less than -4d.
qCompares stable data greater than +4d or less than -4d.
d = the smallest display division
The upper limit and lower limit numerical values are common to each of the weighing,
counting and percent mode. The example for EK-1200i/2000i/3000iis as follows.
Upper limit value “001010”:“101.0g”“1010pcs”“101.0%”
Lower limit value “000990”: “99.0g”“990pcs”“99.0%”
6-1. Setting example
This example will be “Compares plus data greater than
+4d”.
Selecting a comparison mode
1.Press and hold the SAMPLE key to display
f unc .
(If the comparison mode is already set, press the
SAMPLE key to go to “Entering the upper and
lower limit values”.)
2. Press the PRINT key, then the balance displays
pof f X.
3. Press the SAMPLE key several times to display
Cp X.
4. Press the RE-ZERO key several times to display
Cp 3.
5. Press the PRINT key to store the settings.
Cp Hi appears after end .
f unc
pof f 0
Cp 0
Cp 3
Press and hold
Press
several times
Press
several times
To store

13
Cp l o
end
000000
Set using the
relevant keys
001230
To store
LO
LO
Uni t
Returns to
the weighing mode
Cp Hi
000000
Set using the
relevant keys
HI
001234
HI
To store
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 blinking to
change.
RE-ZERO key To set the value of the digit
selected. Hold down the key to
switch the sign “+”and “-“.
(“N”designates a negati ve
value.)
PRINT key To store the value and proceed
to the next step.
MODE key To cancel the value and proceed
to the next step.
7. With Cp l o displayed, press the PRINT key.
Enter the lower limit value using the following keys.
SAMPLE key To select the digit blinking to
change.
RE-ZERO key To set the value of the digit
selected. Hold down the key to
switch the sign “+”and “-“ (see
step 6).
PRINT key To store the value and proceed
to the next step.
MODE key To cancel the value and proceed
to the next step.
8. Press the PRINT key. Uni t appears after
end .
9. Press the MODE key to return to the weighing
mode.

14
7. CALIBRATION
This function adjusts the balance for accurate weighing.
Perform a calibration i n the following cases.
qWhen the balance is first used.
qWhen the balance has been moved.
qWhen the ambient environment has changed.
qFor regular calibration.
7-1. Calibration using a weight
1. Warm up the balance for at least half an hour with
nothing on the pan.
2. Press and hold the calibration (CAL) switch until
Cal appears, and release the switch.
3. The balance displays Cal 0.
To change the calibration weight value, proceed to
step 4.
To use the calibration weight value in the balance
memory, proceed to step 5.
4. Press the SAMPLE key. The display shows the
calibration weight value in “gram”that is stored in the
balance. Use the following keys to change the value.
SAMPLE key To select the digit blinking to
change.
RE-ZERO key To set the value of the digit
selected.
PRINT key To store the value and return to
step 3.
MODE key To cancel the value and return to
step 3.
Cal
Cal 0
01200.0
Cal 0
Press and hold
the CAL switch.
Set the weight using
the relevant keys.
Release
the CAL switch.

15
5.At step 3, pressing the PRINT key weighs the zero-
point value. Do not touch the pan during weighing.
6.Place the calibration weight with the same value as
displayed on the pan. Press the PRINT key to
weigh it. Do not touch the pan during weighing.
7.end appears.
Remove the weight from the pan, and press the CAL
switch or MODE key to return to the weighing mode.
qq Note
The value set in step 4 is stored in memory even after the power is
switched off.
If the balance is to be moved to other places, set the gravity
acceleration value of the area where the calibration using a weight is
to be done, and calibrate the balance according to the procedure
above. See the next section to set the value.
7-2. Gravity acceleration correction
1000.0
end
Weighing pan
With nothing
on the pan
To store
To store
Calibration
weight
Cal 0
1000.0

16
When the balance is first used or has been moved to a different place, it should be
calibrated using a calibration weight.
But if the calibration weight cannot be prepared, the gravity acceleration correction will
compensate the balance. Change the gravity acceleration value of the balance to the
value of the area where the balance will be used. See the gravity acceleration map
appended to the end of this manual.
qq Note
Gravity acceleration correction is not required when the balance is
calibrated 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.
3. Press the RE-ZERO key.
The display shows the gravity acceleration value
stored in the balance.
Use the following keys to change the value.
SAMPLE key To select the digit blinking to
change.
RE-ZERO key To set the value of the digit
selected.
PRINT key To store the value and return to
step 2.
MODE key To cancel the value and return to
step 2.
4. After setting the value, press the PRINT key.
Cal 0is displayed again.
5. If it is necessary to calibrate the balance using a
calibration weight, go to step 4 of 7 -1.
To finish the setting, press MODE key.
6. end appears and the balance returns to the
weighing mode.
8. FUNCTIONS
Cal
Cal 0
9.7980
Cal 0
Returns to
the weighing mode
To store
Release
the CAL switch.
Set the value using
the relevant keys.
Press and hold
the CAL switch.

17
8-1. Key operation
8-2. Entering the function setting mode
In the weighing mode, press and hold the
SAMPLE key to enter the function setting mode and
display f unc . Each time the SAMPLE
key is pressed, the class appears one after another.
Once the class is selected, the set items are
available for selection. (See “Function list”.)
8-3. Setting example
To set auto power-off function to “Enabled”, andthe ACAI function to “Disabled”.
Cancels the operation and turns off the
balance.
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.
St
ores the settings per class and goes to
the next class.
Parameter key
Selects a parameter.
Cancel key
Cancels the operation, and goes to the next
class or returns to the weighing mode.
f unc
Cp Hi
Press and hold
Each pressing
switches the
class
Set using the
relevant keys
•
•
•

18
1. Press and hold the SAMPLE key to display
f unc .
2. Press the PRINT key. The balance displays
pof f 0.
3. Press the RE-ZERO key to display pof f 1.
4. Press the SAMPLE key several times to display
aCai 1.
5. Press the RE-ZERO key to select aCai 0.
6. Press the PRINT key to store the parameters.
Cp Hi appears after end .
7. Press the MODE key to return to the weighing
mode.
8-4. Storing weighing units
It is possible to store the weighing units that will be actually used from the units
available. For the units available, see “5-3. Units”
f unc
pof f 0
pof f 1
aCai 1
Press and hold
Each pressing
switches the
parameter
To confirm
To store
Each pressing
switches the
parameter
aCai 0
end
Cp Hi
Returns to
the weighing mode