A&D EW-12Ki User Manual
x
1WMPD4000465B
© 2011 A&D Company, Limited. 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, Limited.
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.
CONTENTS
1. INTRODUCTION .............................................................................................................3
2. UNPACKING ...................................................................................................................3
3. PART NAMES AND FUNCTIONS...................................................................................4
4. SETTING UP...................................................................................................................5
4-1. Setting up your balance.................................................................................................................5
4-2. Power source.................................................................................................................................5
5. OPERATION ....................................................................................................................6
5-1. Turning 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-i series...............................................................................................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....................................................................................................16
8. FUNCTIONS..................................................................................................................17
8-1. Key operation ..............................................................................................................................17
8-2. Entering the function setting mode ..............................................................................................17
8-3. Setting example...........................................................................................................................18
8-4. Storing weighing units..................................................................................................................19
8-5. Function list .................................................................................................................................20
9. RS-232C SERIAL INTERFACE.....................................................................................22
9-1. Interface specifications................................................................................................................22
9-2. Data format..................................................................................................................................23
9-3. Data output mode........................................................................................................................23
9-4. Command mode..........................................................................................................................24
10. ID NUMBER AND GLP................................................................................................25
10-1. Setting the ID number................................................................................................................25
10-2. GLP report.................................................................................................................................26
1
11. OPTIONS.....................................................................................................................30
11-1. OP-04 Comparator relay output and buzzer ..............................................................................30
11-2. OP-07 Underhook assembly......................................................................................................31
11-3. OP-09 Rechargeable battery pack (Ni-MH) ...............................................................................32
11-4. OP-12 Carrying case .................................................................................................................32
12. MAINTENANCE ..........................................................................................................33
12-1. Notes on maintenance...............................................................................................................33
12-2. Error codes................................................................................................................................33
13. SPECIFICATIONS.......................................................................................................35
13-1. EK-i series................................................................................................................................35
13-2. EW-i series...............................................................................................................................36
13-3. Other weighing units..................................................................................................................37
13-4. Dimensions................................................................................................................................38
GRA VITY ACCELERATION MAP.....................................................................................39
2
1. INTRODUCTION
This manual describes how this balance works and how to get the most out of
it in terms of performance.
The EK-i and EW-i series balances have the following features:
The EK-i series are high resolution type electronic balances having a resolution of
1/6,000 ~ 1/60,000.
The EW-i series are triple range balances and each range has a resolution of
1/3,000.
The balance has a counting function, % function and a comparator function.
The backlight LCD will help with use in a dimly lighted place.
The standard RS-232C serial interface can be connected to a printer or personal
computer.
Using the serial interface, Good Laboratory Practice (GLP) data can be output.
The optional rechargeable battery pack (OP-09) is easy to install for cordless
operation.
2. UNPACKING
When unpacking, check whether all of the following items are included:
Weighing pan
Pan support
Main unit
EW-150i
EK-120i / EK-200i / EK-300i
EK-410i / EK-610i
Please confirm that the AC adapter
is correct for your local voltage and
receptacle type.
AC adapter
Weighing pan
Main unit
EW-1500i / EW-12Ki
EK-600i / EK-1200i / EK-2000i
EK-3000i / EK-6000i / EK-12Ki
EK-4100i / EK-6100i
Instruction Manual
3
3. PART NAMES AND FUNCTIONS
Turns the power on or off.
Held down to enter the function
setting mode.
Weighing mode (EW-i only):
Changes the weighing range
(when rng 0 is selected).
pcs mode:
Enters the sample unit weight
storing mode.
% mode:
Enters the 100% weight
storing mode.
Outputs the weight data to
a printer or computer, or
enters a unit weight, 100%
weight or other setting
values to the balance.
Switches the weighing unit
(the weighing mode).
Clears the display to zero.
4
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:
Do not install the balance in locations that are subject to excessive dust, breezes,
vibration, large temperature fluctuations, condensation, or that may have
magnetic fields.
Do not install the balance on a surface that is soft or that may cause the balance
level to shift.
Do not install the balance in direct sunshine.
Do not install the balance near heaters or air conditioners.
Do not use an unstable AC power source.
Do not install the balance in a place where combustible or corrosive gases may exist.
Allow the balance to reach equilibrium with the ambient temperature before use.
Switch the power ON at least half an hour before use so that the balance can
warm up.
When the balance is installed for the first time, or the balance has been moved,
carry out calibration as described in “7. CALIBRATION.”
4-2. Power source
For the power source, the AC adapter or 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.
If “Lb0” is displayed when using the battery pack, immediately stop
using it, and recharge the battery pack or use the AC adapter.
See “11-3 OP-09 Rechargeable battery pack”, for instructions to
install and charge the battery pack.
Be sure to charge the battery pack before using it for the first time.
5
5. OPERATION
5-1. Turning 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 weight 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.
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
poff
set the function “
”.
5-2. LCD backlight
The LCD backlight will turn on when the weight data 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 “ltUp” of
“Function list”.
6
5-3. Units
The most common unit of weight used around the world is the gram, but there is often
a need to shift to alternative units specific to the country where the balance is used or
to select modes such as counting or percent.
The units and the order they appear in the display are as follows:
Ounce (avoir)
Percent mode
Counting mode
Gram
Tael
Grain
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”
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. Storing 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
Note
The unit “tl (tael)” is for special versions only.
Pound
Troy ounce
Metric carat
Momme
Pennyweight
7
5-4. Selecting a weighing unit
r
r
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).
Each pressing switches the
units available in the orde
described on the previous
page.
ZERO
0.0
Stability mark
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.
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
Make sure that the stability mark 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 keep weighing accuracy. (See ”7.
CALIBRATION”.)
NET
ZERO
0.0
NET
150.3
Containe
Weighing pan
Object to
be weighed
Stability mark
8
5-6. Weighing range for the EW-i series
The EW-i series have three weighing ranges, and the display shows which range
the weight value belongs to with the mark R1, R2 or R3.
There is a function setting to select how the weighing range changes.
Select from automatic range (rng 1), manual range (rng 0) or fixed range (rng 2
to 4).
Operation
Function setting Operation
Automatic range
When the weight value exceeds the maximum value of
the range, the weighing range changes automatically
from a lower to a higher weighing range.
When there is nothing on the weighing pan and the
rng 1
display shows zero with the ZERO mark, the weighing
range changes from a higher to the lowest range.
When the RE-ZERO key is pressed in a higher range,
the balance will be tared to zero and the weighing range
changes to the lowest range.
Manual range
Press 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.
Press the SAMPLE key to change from a higher to the
lowest range, when there is nothing on the weighing pan
and the display shows zero with the ZERO mark.
rng 0
When the RE-ZERO key is pressed in a higher range,
the balance will be tared to zero and the weighing
range changes to the lowest range. If the weight of the
object is not more than 2% of the weighing capacity, the
RE-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.
Fixed range (*)
rng 2 to 4
The weighing range is fixed. Set the function to the
weighing range according to the purpose.
(*)
This function will not be available for some of legally certified models.
9
5-7. Counting mode (pcs)
r
A
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
1SAMPLE key. It may be set to 5, 10, 25, 50,
or 100.
4. Place a tare container on the weighing pan, and
press the RE-ZERO key. Confirm that the
right side of the number of samples shows zero.
5. Place the number of samples specified on the
pan. In this example, 25 pieces.
6. Press the PRINT key to calculate and store
the unit weight. Remove the sample. The
balance is set to count objects with this unit
weight.
When a unit weight is too light to store, the
display shows lo for a moment and
returns to the former display. When the sample
weight is light and the counting error could
become large, the balance will prompt you to
use a larger number of samples. Place the
displayed number of samples on the pan and
press the PRINT key to calculate and store
the unit weight.
See also “Sample quantity notice” and “Unit
weight error” of “12-2. Error codes”.
Counting the objects
7. Place the objects to be counted on the pan.
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.
.
0
10 -
25 -
ZERO
25 0
25
25
Switches the
number of
samples.
Containe
Weighing pan
Confirm the display
Samples
(25 pcs)
To store
CAI mark
ACAI
10
8. After setting the unit weight at step 6, add a few more samples on the pan. Then,
the ACAI mark will turn on. (Add more than three pieces. The mark will not turn on
for the number of samples beyond the ACAI range.)
9. The ACAI mark will blink and the balance re-calculates the unit weight. 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.
ZERO
0.0
100 -
100 0
Weighing pan
Sample corresponding
to the 100% weight
To store
%
%
%
When the reference weight is too light, the
display shows lo for a moment and
returns to the former display.
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.
11
100.0
Object to be
compared
75.8
%
%
Loading...