AD-4212C-300
AD-4212C-600
AD-4212C-3000
AD-4212C-6000
AD-4212C-301
AD-4212C-3100

Production Weighing Unit
AD-4212C Series

1WMPD4001992H

© 2016 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 thismanual are subject to change for improvement without notice.

Windows and Excel are registered trademarks of Microsoft Corporation.

Contents
1.

2.

3.

4.

Introduction ..................................................................................................................................... 4
1.1.

Features ............................................................................................................................................. 4

1.2.

Compliance......................................................................................................................................... 7

Unpacking the Balance ................................................................................................................... 8
2.1.

Unpacking ........................................................................................................................................... 8

2.2.

Installing the Balance ....................................................................................................................... 10

Precautions .................................................................................................................................... 12
3.1.

About dustproof / waterproof performance ....................................................................................... 12

3.2.

Before Use........................................................................................................................................ 12

3.3.

When Building Into a System ........................................................................................................... 13

3.4.

During Use........................................................................................................................................ 17

3.5.

After Use ........................................................................................................................................... 17

3.6.

Power Supply ................................................................................................................................... 17

Operation of WinCT-AD4212C ...................................................................................................... 18
4.1.

Changing the Weighing Speed Using WinCT-AD4212C ........................................................................ 19

4.2.

Sensitivity Adjustment....................................................................................................................... 19

4.3.

Changing the Baud Rate Using WinCT-AD4212C ................................................................................. 21

5.

Smart Range Function .................................................................................................................. 22

6.

Communication Specifications .................................................................................................... 23

7.

Maintenance .................................................................................................................................. 31

8.

Troubleshooting ............................................................................................................................ 32

9.

8.1.

Checking the Balance Performance and Environment .................................................................... 32

8.2.

Asking For Repair ............................................................................................................................. 33

Specifications ................................................................................................................................ 34

10. External Dimensions ..................................................................................................................... 36
11. Options........................................................................................................................................... 37
12. Terms .............................................................................................................................................. 39

3

1.

Introduction

This manual describes how the AD-4212C series balance works and how to get the most out of it in termsof performance.
Read this manual thoroughly before using the balance and keep it at hand for future reference.

1.1. Features
 A Weighing Unit, suitable for building into a production line system. The weighing unit is compact,with a width of 59 mm.
 A Super Hybrid Sensor (SHS) is used to provide high resolution and high response speed.
Model

Weighing
capacity

Readability

AD-4212C-300

320 g

0.001 g0.5 second (0 - 30 g), 1.0 second (30 - 320 g)

AD-4212C-600

620 g

0.001 g0.5 second (0 - 30 g), 1.0 second (30 - 620 g)

AD-4212C-3000

3200 g0.01 g0.5 second (0 - 300 g), 1.0 second (300 - 3200 g)

AD-4212C-6000

6200 g0.01 g0.5 second (0 - 300 g), 1.0 second (300 - 6200 g)

51 g*20.0001 g

1.3 seconds

320 g

0.001 g

1.0 second

510 g*20.001 g

1.3 seconds

3200 g0.01 g

1.0 second

AD-4212C-301
AD-4212C-3100

Stabilization time*1*1

With FAST selected under good environment*2

Smart range (Refer to “5. Smart Range Function”.)

 The AD-4212C series can output the weighing digital data directly. Therefore, the AD-4212C series(the weighing unit) can be connected to a personal computer or a PLC directly.
 Dust-protected and Protected Against Splashing Water (Complying with IP65). The AD-4212C series
has a patented shock absorber under the weighing pan and can cope with movement in all directions,protecting the weighing unit from an actuator malfunction.
 Windows Communication Tools (WinCT-AD4212C), allows easy confirming of the weighing data byusing a Windows-based personal computer.
Windows is a registered trademark of the Microsoft Corporation.
 When connected to an optional remote controller, an AD-8922A, AD-8923-BCD or AD-8923-CC, theremote controller can receive the weighing data and manually perform re-zero and sensitivity
adjustment.
The AD-8922A can output the data using BCD, comparator or analog out by selection of the option
installed in the AD-8922A.
The AD-8923-BCD outputs the data using BCD and the AD-8923-CC outputs the data using CC-Link.
Note: CC-Link is a high-speed field network able to simultaneously handle both control andinformation data.
 When connected to an optional AD-8526 Ethernet converter, it can convert the AD-4212C RS-232C
data, for output to a local area network (LAN).

4

Example 1 (Connecting to a personal computer or an AD-8922A)

AD-4212C

Communication
software“ WinCT-AD4212C”

Accessory
RS-232C cable (10 m)
USB converter(Option: AX-USB-9P)

PersonalcomputerUSB port

AD-8922A“ WinCT”

AD-4212C

USB converter(Option: AX-USB-9P)

Accessory
RS-232C cable (10 m)

PersonalcomputerCommunications cable(Option: AX-KO1786-200)

AD-4212C“ WinCT-Plus”
Accessory
RS-232C cable (10 m)
AD-8526

Crossover
LAN cable

5

PersonalcomputerExample 2 (Connecting to a PLC)

AD-4212C

D-sub 9-

Accessory
RS-232C cable (10 m)

PLC
AD-8922A-01
Connection cable*

BCD input

AD-4212C

AD-8922A
PLC
BCD output board(Option AD-8922A-01)

BCD cable(Fabricate locally)* Specify the AD-8922A-01 connection cable when ordering the AD-8922A-01.
AX-KO3705-200
AX-KO3705-500
AX-KO3705-1000

2m
5m
10 m
AD-8923-CC6

1.2. Compliance

Compliance with FCC Rules
Please note that this equipment generates, uses and can radiate radio frequency energy. Thisequipment has been tested and has been found to comply with the limits of a Class A computing
device pursuant to Subpart J of Part 15 of FCC rules. These rules are designed to provide reasonable
protection against interference when the equipment is operated in a commercial environment. If thisunit 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 toeliminate the interference.
(FCC = Federal Communications Commission in the U.S.A.)

7

2.

Unpacking the Balance

2.1. Unpacking
 The balance is a precision instrument. Unpack the balance carefully. Keep the packing material to
be used for transporting the balance in the future.
 When unpacking, see the illustration below to confirm that everything is included.
Serial No.
Weighing
pan

Screws(Flat head: M4 X 6)

Pan
supportRS-232C
connector

AC adapter
jack
AC adapter
plug

Groundingterminal(See note below.)

Arrow markface upPan
supportboss

RS-232C cable (10 m)

Breezebreak

Weighing
unit

Calibration weight 200 g
OIML, Class E2 or equivalent

Leveling footAccessories

Class F1 Calibration weight(Accuracy : Class E2 ) 200 g

AC adapter *1*2● RS-232C cable (10 m)● Weighing pan● Pan support●

Identification labels
Attach to the AC adapter,
cable,etc.

AC adapter
ID labelAC adapter labels

Screws (Flat head: M4 X 6)

*1 Please confirm that the AC adapter type is correct for your local voltage andreceptacle type.
*2 2-m and 5-m cables are available as options. Refer to “"11.
OPTIONS".
11. Options
”.

8

Note
When the AD-4212C series weighing unit is incorporated into a system, be sure to earth groundthe weighing unit using the grounding terminal.
CautionUse the specified dedicated AC adapter for the balance.
Use the included AC adapter, and do not connect an AC adapter that is not compatible.
If using the wrong AC adapter, the balance and other equipment may not work properly.

Attaching the AD-4212C series weighing unit directly on the mounting base
When the AD-4212C series weighing unit is built into a system, remove the three leveling feet anduse the screw holes to secure the weighing unit to the base.

Attachment Procedure
1.

Remove the three leveling feet.

Caution
Do not remove any other screws from thebottom of the weighing unit. Doing so could
damage the weighing sensor.

Weighing
unit
2.

Secure the weighing unit from above. (Prepare
appropriate screws with a size corresponding toan M5 screw. The screw hole diameter: 6 mm).

Leveling footIn case of securing the weighing unit from theunder side, use M6 screws with 1-mm pitch.
Notes
The screws to secure the weighing unit to themounting base are not provided.

To secure

For the position of the holes, refer to“10. External Dimensions”.

When the leveling adjustment is difficult to perform due to the installation conditions, place a shim
between the lower surface of the weighing unit and the securing surface, or use two nuts. If theadjustment is still difficult to perform, perform sensitivity adjusutment before use. Then, the balance
will function normally.

92.2. Installing the Balance
Install the balance as follows:
1. Refer to “3. Precautions” for installing the balance.
2. Refer to "2.1. Unpacking", to attach the pan support and the weighing pan on the weighing unit.
3. Insert the RS-232C cable into the jack located on the rear of the weighing unit.

Rear of theweighing unit

When confirming the performanceof the weighing unit using WinCTAD4212C, connect the cable into
RS-232C terminal of the computer.

Arrow markface upD-sub 9-pin

RS-232C cable

How to disconnect the cable from the weighing unit
Slide the connector sleeve in the direction of the arrow to unlock and gently pull the connector out.

Unlocked
Slide the connector sleevein the direction of the arrow
4. Confirm that the AC adapter type is correct for the local voltage and power receptacle type.
5. Plug the AC adapter plug into the AC adapter jack located on the rear of the weighing unit and plug
the AC adapter into the electrical outlet. Warm up the balance for 30 minutes or more with nothing
on the weighing pan.
6. Set the pan unit and I/O unit to adapt to the peripheral system. Set the following for the I/O unit.
 RS-232C (Refer to“6. Communication Specifications”)
Set the weighing speed to adapt to the ambient conditions.
Note
Make sure that the personal computer is in operation before connecting to the AD-4212C.
7. After the balance has been installed, adjust the sensitivity of the balance using the 200 g calibration
weight provided with the balance. For details, refer to “4.2. Sensitivity Adjustment”.
(The AD-4212C-3000/6000/3100 can be adjust the sensitivity of the balance using the 200 g weight.)
8. By removing the provided weighing pan, a locally fabricated weighing pan can be attached to the AD-4212C
series by using the four screw holes (M4 screw x pitch 0.7 mm) on the pan support.
10

Mass of the locally fabricated weighing pan
Design the weighing pan so that the mass falls within the ranges shown in the table below:
StatusMass ofthe weighing pan (g)Pan support is used (with weighing pan removed)

20 to 130

Pan support boss is used (with the weighing pan
and pan support removed)

70 to 180

Pan support is used (with weighing pan removed)

20 to 410

Pan support boss is used (with the weighing pan
and pan support removed)

70 to 460

Pan support is used (with weighing pan removed)

20 to 3010

Model
AD-4212C-300/301

AD-4212C-600

AD-4212C-3000/3100 Pan support boss is used (with the weighing pan
and pan support removed)
AD-4212C-6000

Pan support is used (with weighing pan removed)

20 to 6010

Pan support boss is used (with the weighing pan
and pan support removed)

70 to 6060

AD-4212C-300/301

When the weighing pan
is removed

320 g

20 g

Mass range
210 g
to be weighed

130 g
Mass
of locallyfabricated pan

AD-4212C-600

When the weighing pan andpan support are removed

320 g

When the weighing pan
is removed

Mass range
210 g
to be weighed

620 g

180 g
Mass oflocally
70 gfabricated pan

20 g

AD-4212C-3000/3100

When the weighing pan
is removed

3200 g

20 g

Mass range
210 g
to be weighedMassof locallyfabricated pan

70 to 3060

Mass oflocally
70 gfabricated pan

410 g

Mass oflocally
fabricated pan

Mass oflocally
70 gfabricated pan

When the weighing pan
is removed

Mass range
210 g
to be weighed

3010 g

620 g

Mass range
210 g
to be weighed

460 g

AD-4212C-6000

When the weighing pan andpan support are removed

3200 gMass range
210 g
to be weighed

When the weighing pan andpan support are removed

6200 gMass range
210 g
to be weighed

When the weighing pan andpan support are removed

6200 gMass range
210 g
to be weighed

6010 g3060 g
20 g

Mass oflocally
fabricated pan

6060 gMass oflocally
70 g fabricated
pan

Notes
If the balance is to be used in a range other than shown above, contact the local A&D dealer.
To avoid the effects of static electricity or magnetism, use materials other than resin ormagnetic materials when designing a weighing pan.
When a locally fabricated weighing pan is used, the zero point may be shifted greatly rightafter the AC adapter is plugged in. Perform re-zero before weighing to cancel the amount ofzero drift as necessary.
113.

Precautions

To get the optimum performance from the balance and acquire accurate weighing data, note the following:

3.1. About dustproof / waterproof performance The dustproof / waterproof level IP65 of the balance means "not affected by direct jets of water".
Washing with strong water pressure, submersion in water, etc. may cause water to enter the balanceand cause a malfunction.
 When installing the balance in a dustproof / waterproof environment, make sure that the AC adapter
plug is firmly inserted into the AC adapter input jack and that the RS-232C output cable is attached.
 When not using the AC adapter or RS-232C output cable, attach the rubber caps affixed to thepacking rings.

Rear of the weighing unit
Rubber cap

RS-232C
output connector

AC adapter
input jackAC adapter
plug

Ground terminal
Rubber cap

Install with the arrowfacing up
RS-232C
output cable

3.2. Before Use
 Install the weighing unit in an environment where the temperature and humidity are not excessive.
The best operating temperature is about 20°C / 68°F at about 50% relative humidity.
 Install the weighing unit where it is not exposed to direct sunlight and it is not affected by heaters
or air conditioners.
 Install the weighing unit where it is free of dust.
 Install the weighing unit away from equipment which produces magnetic fields.
 Install the weighing unit in a stable place avoiding vibration and shock. Corners of rooms on thefirst floor are best, as they are less prone to vibration.
 Ensure a stable power source when using the AC adapter.
 Plug in the AC adapter as usual, and warm up the balance for 30 minutes or more.
 Adjust the sensitivity of the balance before use or after having moved it to another location.
In addition, adjust the sensitivity of it periodically to maintain the accuracy.

Caution

Do not install the balance where flammable or corrosive gas is present.
12

3.3. When Building Into a System
The AD-4212C is a precision balance. When it is built into a system, errors such as unstable weightvalues may occur due to static electricity, vibration, sample temperature and magnetism of thematerials weighed or used for the devices near the balance.
When using the balance as part of a system, take the following precautions:Precautions when not performing the weighing at the center of the weighing pan

If not performing the weighing at the center of the weighing pan, design the weighing system so thatthe total moment of the support device and the object to be weighed will be the value specified in thetable below. Even a load, with a moment of less than the specified value, when applied to the balance,
may cause the overload protection mechanism to function slowly, to tilt the weighing pan.
Allowable eccentric load for each model
Model
AD-4212C-300/600/301
AD-4212C-3000/6000/3100

Allowable eccentric load
0.1 Nm or less
0.3 Nm or lessAD-4212C-300/600/301
Example of a system where the total moment of the device and the object is 0.1 Nm or less:

200 g X 0.05 m

AD-4212C-3000/6000/3100
Example of a system where the total moment of the device and the object is 0.3 Nm or less:

300 g X 0.1 m

Note:

The values above are for reference and may be different from actual specifications.
Although the overload protection mechanism is built in, please avoid giving impact
shock to the weighing pan while weighing.
If a heavy weighing material is placed on the weighing pan, it may bend downward
slightly. When you make a jig, consider it.

13 Errors due to a static charge and measures to take

When the ambient humidity is less than 45% RH, insulators such as plastic or glass are prone tostatic electricity. When charged material comes close to the balance, a pulling force is generated bystatic induction between the charged material and the weighing pan. This causes an unstable weightvalue.
To protect the balance against a discharge generated by charged material when it comes close to
the balance, be sure to earth ground the weighing unit and the display unit.
Note that static electricity generated by static induction will not be canceled by earth-grounding. Usea humidifier or the AD-1683 DC static eliminator,
Charged plastic breeze break
Charged sample

The pulling force
causes an unstableweight value

A pulling force generated between
the charged sample and the balancecauses an unstable weight value.

Measures to take (Plastic is used in the examples below. They can be applied to glass, too.)
When the sample or devices are plastic
Charged Use a static eliminator that generates no air blow such as the AD-1683,
material
DC static eliminator, to remove static electricity.
Metal case
 Place the sample in a container that is made of a conductive material
such as metal and that can be sealed, and then weigh it.
When the sample is powdery When the balance is used in combination with a feeder for batchweighing of powdery samples, samples may be charged by rubbing
sample particles against each other.
Use a static eliminator and perform weighing while removing static
electricity.

Grounding

When the sample container is made of material that is prone to static electricity such as plastic
 Cover the outside of the container with a metal such as aluminum foil.
 Apply an anti-static agent onto the container.
When making a breeze break using plastic
 Apply an anti-static agent onto the breeze break.
 Use a conductive acrylic fiber.
When plastic exists in the balance installation site Cover the plastic with a grounded conductive material.
 Apply an anti-static agent onto the plastic.
When an operator is static charged
If an operator’s clothes are static charged, especially in winter, it may be a cause for unstable weightvalues.
 Wear an anti-static wrist strap.
14



Errors due to airflow and measures to take

Where the influence of ambient airflow is great such as: close to an
air conditioner, door or passage way. Even very subtle airflow thatis hard to be detected may influence the weighing operation.
 Avoid those areas as a weighing site.
 If weighing is to be performed in such an area, use a breeze
break or take other appropriate measures.

Draft
Where the influence of heat or drafts is great
40 C
 Eliminate temperature differences between a sample and the
20 C
environment.
When a sample is warmer (cooler) than the ambient
temperature, the sample will be lighter (heavier) than the true
weight. This error is due to a rising (falling) draft around thesample.
 Do not touch the sample directly with your hand. Use tweezers
or other tools.
If you touch the sample, the same type error described above
will occur.
 Do not perform weighing where it is exposed to direct sunlight. Weighing errors may occur due
to sudden temperature change or drafts.



Errors due to vibration and measures to take

Where the influence of vibration is great, such as:(1) Soft ground (2) Second or higher floor (3) Near center of a floor far from pillars (4) Seismic
isolated structures (5) Near tall buildings.
In the areas listed above, the scale may yield unstable weight values on windy days or after anearthquake. Especially in case of (4) and (5), weight values may be unstable for a long period of time
because of long lasting low-frequency vibration after strong winds or an earthquake.

15



Errors due to moving the weighing unit

The performance of this device is guaranteed when it is not moving.
When incorporating the weighing unit into a system that moves the main body, pay sufficient attention
to the following and perform a thorough preliminary check.
 If moving the weighing unit, it may be damaged by impact.
Also, the measured value will not be stable immediately after moving.
Avoid sudden movement, stopping, and impact, and provide a sufficient waiting time for themeasurement value to stabilize when acquiring measurement data.
 The moving device should have a structure where the weighing unit can be kept level.
 In order to avoid the influence of vibration, the moving table should have a structure that is lesssusceptible to vibration, such as reducing the play of moving parts.

Errors due to other causes and measures to take

Change in temperature or humidity
A sudden change in temperature or humidity can generate a draft and cause the balance to absorb or
exude moisture, which leads to unstable displays.
 Avoid sudden change in temperature or humidity.
 Use an air conditioner or humidifier to control the temperature or humidity.

Magnetic material
The balance uses a strong magnet as part of the balance assembly, so use much care whenweighing magnetic materials.
 Place a non-magnetic object such as aluminum or brass between the sample and the balance
to keep an appropriate distance between them while weighing.

16

3.4. During Use
 To minimize the affect by electrical noises, earth ground the weighing
unit and the display unit (option).
 Do not drop things upon the weighing pan, or place a sample on the
pan that is beyond the balance weighing capacity. Place a sample inthe center of the weighing pan to minimize corner-load errors.
 To prevent possible errors, before each weighing, perform re-zerousing the RS-232C command, or calculate the difference between theweight value before and after weighing.
 Take into consideration the affect of air buoyancy on a sample when measuring the absolute value
with the Readability of 0.1 mg.
 Even though the scale is dust-protected and protected against splashing water, complying with IP65,
be sure to clean the weighing pan and keep the conditions around the pan clean after weighing
powdery, fluid samples or metallic strips.

3.5. After Use Avoid mechanical shock to the weighing unit.
 Periodically adjust the sensitivity of the balance, using a calibration weight.
 Do not disassemble the weighing unit. Contact the local A&D dealer if the balance needs service orrepair.
 Do not use organic solvents to clean the weighing unit. Clean the weighing unit with a lint free cloththat is moistened with warm water and a mild detergent.
 Avoid dust and water so that the weighing unit weighs correctly. Protect the internal parts from liquid
spills and excessive dust.

3.6. Power Supply When the AC adapter is connected, the balance is in the standby mode if the standby indicator is on(refer to “4. Operation of WinCT-AD4212C”). This is a normal state and does not harm the balance.
For accurate weighing, plug in the AC adapter and warm up the balance for the appropriate duration
before use.

17

4.

Operation of WinCT-AD4212C

The software has the following functions:- Set the weighing speed- Set the readability value- Sensitivity Adjustment- Set the baud rate
• The parameters set using these functions, are stored in non-volatile memory, and maintained,even if the AC adapter is removed.
A data logging function, allows confirmation of the weighing data after weighing

Before use

Download the software from the A&D website noted below.
Software download:
https://www.aandd.jp/products/software/software.html(This URL is subject to change. If it has changed, please access Support from https://www.aandd.jp/)
1. Install WinCT-AD4212C on the computer. For details, refer to Readme of WinCT-AD4212C.
2. Connect one end of the RS-232C cable to the weighing unit RS-232C connector and connect theother end of the RS-232C cable (D-sub 9-pin) to the personal computer RS-232C terminal.
3. Set the COM port of WinCT-AD4212C on the personal computer, and then press the START
button. The personal computer will display the weight value.

Function of display symbols and buttons
Weighing speed indicators
Processing indicator
Stabilization indicatorStandby indicator
Unit (g)Weighing data or stored data

ButtonWhen pressed

ON/OFF

Switches between the weighing mode and the standby mode. With the standby mode,
only the standby indicator is displayed. The ON/OFF button is available anytime.
Therefore, if you press the ON/OFF button when operating, the balance switches to thestandby mode.

SAMPLEIn the weighing mode, switches the Readability.

MODE

Changes the weighing speed.

CAL

Enters the sensitivity adjustment mode.

PRINT(Usually no function. Used in the sensitivity adjustment mode.)

RE-ZERO Sets the display to zero.
18

4.1. Changing the Weighing Speed Using WinCT-AD4212C
The weighing speed can be selected from the following three rates to minimize the influence on weighingthat is caused by drafts and/or vibration at the place where the balance is installed.
Indicator
FAST
MID.
SLOW

Speed
Fast

Stability
Sensitive value

Slow

Stable value

Weighing speed setting

Operation

MODE

1. Press the MODE button.

2. Press the MODE button to select a weighing speed.
Either FAST, MID. or SLOW can be selected.

MODE Each pressing
switches
the indicators

4.2. Sensitivity Adjustment
Sensitivity adjustment

Adjust the sensitivity of the balance using a calibration weight.
Sensitivity adjustment is possible without removing the special plate or jig attached to the measuring
plate.
(However, the total of the special plate and jig and the calibration weight used must not exceed thecapacity of the balance.)

Caution Do not allow vibration or drafts to affect the balance during sensitivity adjustment.

Caution on using an external calibration weight The accuracy of the weight can influence the accuracy of weighing. Select an appropriate weight aslisted below. A calibration weight (conforming to OIML, Class E2 or equivalent) is provided with thebalance as a standard accessory.
Model

Usable calibration weight

Calibration weightprovided

AD-4212C-300
AD-4212C-600
AD-4212C-3000
AD-4212C-6000
AD-4212C-301
AD-4212C-3100

50g, 100g, 200 g, 300g
50g, 100g, 200 g, 300g, 400 g, 500 g, 600 g
50g, 100g, 200 g, 300g, 500 g, 1000 g, 2000g, 3000g
200 g, 500 g, 1000 g, 2000g, 3000g, 4000 g, 5000 g, 6000 g
50g, 100g, 200 g, 300g
50g, 100g, 200 g, 300g, 500 g, 1000 g, 2000g, 3000g

200 g

The calibration weight in bold type: factory setting

19

Display This indicator means “the balance is measuring sensitivity adjustment
data”. Do not allow vibration or drafts to affect the balance while thisindicator is displayed.

Sensitivity adjustment procedure

This function adjust the sensitivity of the balance using the calibration weight.
(Display example: AD-4212C-300)

Operation

1. Plug in the AC adapter and warm up the balance for 30 minutes or morewith nothing on the pan.

2. Press the CAL button.

Cal 0

is displayed.

 If you want to cancel sensitivity adjustment, press the CAL button. Thebalance will return to the weighing mode.

Press CAL If you want to change the calibration mass value, press the SAMPLE
button. Press the RE-ZERO button to select the mass value, and press
the PRINT button to store it. Cal 0
is displayed.

3. Confirm that there is nothing on the pan and press the PRINT button.
The balance measures the zero point. Do not allow vibration or drafts
to affect the balance.
The balance displays the calibration weight value.

4. Place a calibration weight, of the weight value displayed, on the
pan and press the PRINT button. The balance measures thecalibration weight. Do not allow vibration or drafts to affect thebalance.

5. The balance displays

Calibration
weightend . Remove the weight from the pan.

6. The balance will automatically return to the weighing mode.

7. Place the calibration weight on the pan and confirm that sensitivity
adjustment was performed correctly. If not, check the ambient conditions
such as drafts or vibration, and repeat steps 2 through 7.

20

Press PRINT

Press PRINT

4.3. Changing the Baud Rate Using WinCT-AD4212C
Operation
1. Click the [Settings] tab.

2. Select the baud rate to be used and click the

Set[Settings] tabSetbutton

3. “Completed” appears when the setting is complete.

21

button. (Factory setting: 2400)

5.

Smart Range Function

The AD-4212C-301/3100 are equipped with two ranges. The precision range has a higher resolution.
The standard range has a normal resolution.
The range switches automatically, depending on the value displayed. Sending the R command allows
weighing in the precision range, regardless of the tare value.
The range can be fixed to the standard range by changing the Readability using the SMP command.
1 Send the R command
The balance will start weighing, using the precision
range.
2 Place a container on the weighing pan.
The weight value exceeds the precision range
value and the balance will switch to the standard
range.

Display example: AD-4212C-301
Weighing
pan

Precision range

Container

Standard range

3 Send the R command
The balance will switch to the precision range.

Precision range

4 Place a sample in the container.
The weight value is within the precision range
value and the balance will perform a weighing,using the precision range.

SamplePrecision range

Precision range/standard range
Model
AD-4212C-301
AD-4212C-3100

Range used
Precision range*1
Standard range
Precision range*2Standard range

Weighing range
0 g to51 g
51 g to 320 g
0 g to 510 g
510 g to 3200 g

Readability
0.0001 g
0.001 g0.001 g0.01 g• The factory setting is the precision range.
*1 When the weight value exceeds 51 g while the Readability of 0.0001 g (precision range) is used, thebalance will switch to the Readability of 0.001 g (standard range). By sending the R command, thebalance can weigh from that point up to 51 g, using the Readability of 0.0001 g (precision range).
*2 When the weight value exceeds 510 g while the Readability of 0.001 g (precision range) is used, thebalance will switch to the Readability of 0.01 g (standard range). By sending the R command, thebalance can weigh from that point up to 510 g, using the Readability of 0.001 g (precision range).

22

6.

Communication Specifications

The AD-4212C series can communicate interactively using RS-232C.
The AD-4212C series can continuously transmit the weighing data. (Approx.10 times/second* to 50
times/second)
The AD-4212C series is DCE. The AD-4212C series can connect directly to the RS-232C terminal of apersonal computer by using the accessory RS-232C cable.
* Factory setting

1. RS-232C specification
Transmission system
Transmission form
Transmission rate
Data format

EIA RS-232C
Asynchronous, bi-directional, half duplex
Approx.10 times/second* to 50 times/second
Baud rate
2400bps* to 19200bps
Data bits
7 bitsParityEVEN
Stop bit
1 bitsCode
ASCII
Terminator<CR><LF>* Factory setting

LSB

Start bit

MSB

Data bits

Stop bit
Parity bit

Relation between baud rate and transmission rate of weighing data
Baud rate
2400bps
4800bps
9600bps
19200bps

Transmission rate of weighing data
12.5 times/second
25.0 times/second
50.0 times/second
50.0 times/second

23

1-5V to -15V0

+5V to +15V

2. Pin position

Pin position of the RS-232C cable (D-Sub 9-pin side, female)

5

1

Inch screw

96

Pin No. Signal name

Direction

Description

Internally used*(Power supply GND terminal for external equipment)
2
TXD
OutputTransmit data
3
RXD
Input
Receive data
4
N.C.
5
SG
Signal ground
6
Internally used*
7
RTS
Input
Request to send
8
CTS
OutputPermission to send
Internally used*
9(Va)(Power supply output terminal for external equipment)
CTS and RTS are internally connected in the balance.
The AD-4212C can communicate by connecting TXD, RXD and SG.
* When connecting to a PLC such as the external equipment, do not connect to the internally usedsignal line.
1

(Vs)

-

3. Data output format- This format consists of fifteen characters excluding the terminator<CR><LF>.
- A header of two characters indicates the balance condition.
- The polarity sign is placed before the data with the leading zeros. If the data is zero, the plus sign is applied.
Example of output
1

2

3

4

5

6

7

8

9

10

11

12

S

T

,

+

0

0

1

2

.

3

4

5

Header

13

14

15
g

Data

Unit

When stable
S

T

,

+

0

0

1

2

.

3

4

5

g

,

+

0

0

0

5

.

4

3

2

g

9

9

9

9

9

9

E

+

1

9

9

9

9

9

9

9

E

+

1

9

When unstable
U

S

When over state (plus over)
O

L

,

+

9

When over state (minus over)
O

L

,

-

9

means “space”

24

4. Command
The balance can be controlled by the following commands.
When transmitting, add the terminator <CR><LF> to each command.
Commands to query weighing data
When the display is turned on, the AD-4212C series outputs the weighing data continuously.
To use the Q or S command, send the C command to stop the continuous data output, then request
the weighing data using the Q or S command.
CommandC
Q
S
SIR

Description
Cancels the SIR command.
Requests the weighing data immediately. (Outputs data regardless of the display
condition, stable or unstable. Use this command while the continuous output is stopped.)
Requests the weighing data when stabilized. (After the weighing data has stabilized,
outputs the data. Use this command while the continuous output is stopped.)
Requests the weighing data continuously.
Starts the continuous output of the weighing data. (The C command stops thecontinuous output.)

Commands to control the balance
Command
Description*1Entersthesensitivity
adjustment
mode.
CAL
OFF
ON
P
PRT
R
SMP
U

Turns the display off. The weighing unit is in the standby mode.
Turns the display on. The weighing unit is in the weighing mode.
Switches between the weighing mode and the standby mode.
Confirms the sensitivity adjustment value.
Sets the display to zero (tare). *2
Changes the readability.
Changes the weighing speed. *1*1 When changing the weighing speed or in the sensitivity adjustment mode, the balance outputs
the control character starting with “@”.
*2 When setting the display to zero, the command waits for the weight value to become stable.
When the command waits for the weight value to become stable, the balance stops sending theweighing data.

25

Example of the R command
Personal computer

Time

Weighing unit
S

R command

T , + 0

0 0

0

. 0 1

2

g

0

g

R CR LF(Stops the data output)

S T , +

00 0means “space”

26

0 . 0

0

Example of the CAL commandmeans “space”
27

Example of the SMP command
Personal computer

Time

Weighing unit
S T , +

SMP command
S M P CR LF

S

T ,

0 0

+ 0

0 0

0 0

. 0 1

0 0

. 0

2

g

1

g

Example of the R command when the precision range is used
Personal computer

Time

Weighing unit
S T , +

0 0

0 . 0

0 0

0

g

4

g

The weight value exceeds 51 g.
S T , +

R command

0 0

5 1

. 2 3

R CR LF(While waiting for the weight value to become stable,
stops the data output)

S

T ,

+ 0

0 0

. 0

0 0

0

g

1 . 2

3 4

5

g

Place a sample.
S T , +

0 0means “space”

28

S command when old versions of the AD-4212C series balances are used

For AD-4212C balances with a software version 1.40 or earlier, the S command must be enabledusing the procedure described below.
For AD-4212C balances with a software version 1.41 or later, the S command is enabled by sending
the C command to stop the continuous data output.
Enabling the S command
Download the “WinCT” software on our website, https://www.aandd.co.jp/.
Carry out the following procedure using the “RsCom” software in the “WinCT”.
1. Send the C command to stop the continuous data output.

2. Changing the setting
Send the PR:00 command to the balance.
The balance enters the command mode. This enables
the S command. This setting is maintained in memory
even if the AC adapter is removed.

29

3. Confirming whether the PR:00 command has been
carried out correctly.
Send the “?PRT” command.
When the response is “Pr,00”, the setting is correct.
Because the setting is in the command mode, thebalance does not output the weighing data continuously.

4. Returning the setting value to the default value
Send the “PR:03” command to the balance.
The balance enters the continuous output mode.
When the “SIR” command is sent to the balance, the balance outputs the weighing data
continuously.

30

7.

Maintenance If the balance becomes dirty, wipe it clean with a lint free cloth that is moistened with warm waterand a mild detergent.
 Do not use organic solvents or chemical wipes to clean the balance.
 Do not disassemble the balance.
 Use the original packing material for transport.
 The dustproof and waterproof specifications of the AD4212C series indicate waterproof performancein ordinary use, which allows you to wash the weighing pan with water while it is installed.
Note that if the balance is submerged in water or if water pressure is applied to the bottom of thebalance body, water may get inside.
 When installing the balance in a dustproof / waterproof environment, make sure that the AC adapter
plug is firmly inserted into the AC adapter input jack and that the RS-232C output cable is attached.
 When not using the AC adapter or RS-232C output cable, attach the rubber caps affixed to thepacking rings.
 If you wash the balance with hot water, condensation may form inside the balance. Be careful not toallow water vapor to enter inside.

Rear of the weighing unit
Rubber cap

RS-232C
output connector

AC adapter
input jackAC adapter
plug

Ground terminal
Rubber cap

Install with the arrowfacing up
RS-232C
output cable

31

8.

Troubleshooting

8.1. Checking the Balance Performance and Environment
The balance is a precision instrument. When the operating environment or the operating method isinadequate, performing accurate weighing will not be possible. If the balance seems to have a problem
with repeatability or to perform improperly, check as described below.
Also, visit our website, https://www.aandd.jp/, for “Information Library” and “FAQ”.
If improper performance persists, contact the local A&D dealer for repair.

Checking that the balance performs properly Check the balance repeatability using the calibration weight. Be sure to place the weight in the centerof the weighing pan. Pay attention to the airflow. Use the breeze break, or cover the balance ifnecessary.
 Check the balance repeatability, linearity and weighing value using external weights with a known
value.
 When the balance is built into a system, remove the balance from the system. Place it on a solid
table and perform checking.
When the balance proper performance is confirmed, refer to “3.3. When Building Into a System” to set
up the installation site.

Checking that the operating environment or weighing method is proper
Check each item below. Refer also to “3.3. When Building Into a System”.
Operating environment
 Is the weighing table solid enough?
 Is the operating environment free from vibration and drafts? Has the breeze break been installed?
 Is there a strong electrical or magnetic noise source such as a motor near the balance?
 Is there a heat source near the balance?
Weighing method Does the weighing pan touch the breeze break or anything? Is the weighing pan installed correctly?
 Has the weight value been set to zero by using an RS-232C command (R command) before placing
a sample on the weighing pan?
 Is the sample placed in the center of the weighing pan?
 Has the balance been warmed up for 30 minutes or more before weighing?
 Are the leveling feet of the weighing unit placed flat to the installation surface?
If not, the weight value will be unstable or the specified repeatability cannot be obtained.
Improve the installation condition, by securing the weighing unit or reducing the vibration that isconveyed to the weighing unit.

32

Sample and container
 Has the sample absorbed or lost moisture?
 Has the temperature of the sample, and the container if used, been allowed to equalize to theambient temperature? Refer to “3.3. When Building Into a System”.
 Is the sample charged with static electricity? Refer to “3.3. When Building Into a System”.
 Is the sample of magnetic material such as iron? Use much care when weighing magnetic
materials. Refer to “3.3. When Building Into a System”.

8.2. Asking For Repair

If the balance needs service or repair, contact the local A&D dealer.
The balance is a precision instrument. Use much care when handling the balance and observe thefollowing when transporting the balance.
 Use the original packing material.
 Remove the weighing pan from the weighing unit.

33

9.

Specifications

AD-4212C-300

AD-4212C-600

AD-4212C-301

Weighing capacity

320 g

620 g

320 g / 51 g*1

Maximum display

320.084 g

620.084 g

320.084 g / 51.0009 g

Readability(1 digit)

0.001 g0.001 g0.001 g / 0.0001 g

Repeatability(Standard deviation)

0.001 g0.001 g0.001 g / 0.0002 g

Linearity±0.002 g±0.005 g±0.002 g

Stabilization time in seconds(typical at FAST
under good environment)

0-30 g0.5 s0-30 g0.5 sWhen the Readability of
1.3 s*20.0001 g is selected30-320 g

1.0 s

30-620 g

1.0 s

When the Readability of
0.001 g is selected

Approx.10 times/second* to 50 times/second

Display refresh rate
I/O unit

1.0 s

Bi-directional, 2400 bps* to 19200 bps(WinCT-AD4212C communication software provided)

RS-232C

Sensitivity drift±2 ppm/°C (10°C to 30°C/50°F to 86°F )Operating environment

5°C to 40°C (41°F to 104°F), 85% RH or less (No condensation)

Allowable eccentric load

0.1 Nm or less (With the center of the weighing pan as a reference)

Calibration weight provided

200g (Conforming to OIML Class E2)External sensitivity
adjustment weight

50 g, 100 g,
200 g*, 300 g

50 g, 100 g,
200 g*, 300 g,
400 g, 500 g,
600 g

50 g, 100 g,
200 g*, 300g

Dimensions

59 (W) × 231 (D) × 91 (H) mm

Weighing pan

50 × 50 mm

Mass

Approx. 1.6 kg

Connection cable

Approx. 10 m

Unit display mode

Gg

Weighing
unit

AC adapter

Output voltage 12 V (Confirm that the adapter type is correct for the local
voltage and power receptacle type)

Power consumption

Approx. 10 VA (supplied to the AC adapter)*1

Smart range (Refer to “5. Smart Range Function”.)*2

When the precision range is used

* Factory setting

34

AD-4212C-3000

AD-4212C-6000

AD-4212C-3100

Weighing capacity

3200 g6200 g3200 g / 510 g*1

Maximum display

3200.84 g

6200.84 g

3200.84 g / 510.009 g

Readability(1 digit)

0.01 g0.01 g0.01 g / 0.001 g

Repeatability(Standard deviation)

0.01 g0.01 g0.01 g / 0.002 g

Linearity±0.02 g±0.04 g±0.02 gStabilization time in seconds(typical at FAST
under good environment)

0.5 s

When the Readability of
0.001 g is selected

1.3 s*2

300-3200 g 1.0 s 300-6200 g 1.0 s

When the Readability of
0.01 g is selected

1.0 s0-300 g0-300 gApprox.10 times/second* to 50 times/second

Display refresh rate
I/O unit

0.5 sBi-directional, 2400 bps* to 19200 bps(WinCT-AD4212C communication software provided)

RS-232C

Sensitivity drift±2 ppm/°C (10°C to 30°C/50°F to 86°F )Operating environment

5°C to 40°C (41°F to 104°F), 85% RH or less (No condensation)

Allowable eccentric load

0.3 Nm or less (With the center of the weighing pan as a reference)

Calibration weight provided

200g (Conforming to OIML Class E2)External sensitivity
adjustment weight

50 g, 100 g,
200 g*, 300 g,
500 g,
1000 g, 2000 g,
3000 gDimensions
Weighing
Weighing pan
unit
Mass

200 g*, 500 g,
1000 g, 2000 g,
3000 g, 4000 g,
5000 g, 6000 g

59 (W) × 231 (D) × 91 (H) mm
50 × 50 mm
Approx. 1.6 kg

Connection cable

Approx. 10 m

Unit display modeGg

AC adapter

50 g, 100 g,
200 g*, 300 g,
500 g,
1000 g, 2000 g,
3000 gOutput voltage 12 V (Confirm that the adapter type is correct for the local
voltage and power receptacle type)

Power consumption

Approx. 10 VA (supplied to the AC adapter)*1

Smart range (Refer to “5. Smart Range Function”.)*2

When the precision range is used

* Factory setting

35

10. External Dimensions
Pan support
dimensions

91.9 1

50

4-M4

80.5

30

59
50
46 0.2

3-M6

When securing,use the M5 screws.

15.6

66

9.3

1

50
231

0.2

Size of whenconnected.
Approx.30

16

254

218

231

50

46

13

(6.5)

98

48.8

30
18.8

48.8

2- 4.3 hole

- AD-4212C-300 / 600 / 3000 / 6000 / 301 / 3100

Unit: mm36

11. Options
AX-KO3590-200 RS-232C cable
AX-KO3590-500 RS-232C cable
AX-KO3590-1000 RS-232C cable

2m
5m
10 m

(provided with the balance as a standard accessory.)

AX-USB-9P: USB converter/Cable set
 USB converter (D-Sub 9 pin - USB) RS-232C cable (D-Sub 9 pin - D-Sub 9-pin)* This RS-232C cable is not used with the AD-4212C series.

AD-8922A: Remote controller
 The AD-8922A can receive the weighing data, and performs
re-zero and sensitivity adjustment manually.
 The AD-8922A can output the data using BCD (AD-8922A01), comparator (AD-8922A-04), or analog out (AD-8922A06), by selection of the option installed in the AD-8922A.

AD-8923-BCD/CC: Remote controller
 The AD-8923-BCD or AD-8923-CC can receive the weighing
data, and performs re-zero and sensitivity adjustment
manually.
 The AD-8923-BCD can output the data using BCD.
The AD-8923-CC can output the data using CC-Link.

AD-8526: Ethernet converter The AD-8526 can convert the AD-4212C RS-232C data, for
output to a local area network (LAN).

AD-1683: DC static eliminator A compact design with efficient static elimination
 No air blowing from a fan allows precision weighing37

AD-1684A: Electrostatic field meter This option measures the amount of the static charge on the sample,
tare or peripheral equipment and displays the result.
If those are found to be charged, discharge them using the AD-1683
DC static eliminator.

AD-8127 Multi-Printer Small dot impact type printer that connects to a balance via an RS-232C interface.
 Statistical function, clock and calendar function, interval print function, graphic print function, dump
print mode.

38

12. Terms
Stable value

The weight value when the stabilization indicator appears.

Environment

Ambient conditions such as vibration, drafts, temperature, static electricity ormagnetic fields which affect the weighing operation.

Sensitivity adjustment Adjustment of the balance using the calibration weight so that it can weigh accurately.
OutputTo output the weighing data using the RS-232C interface.

Zero point

A weighing reference point or the zero display. Usually refers to the value displayedwhen nothing is on the weighing pan.

Digit

Unit of readability. Used for the balance, the minimum displayable weighing value.

Tare

To cancel the weight of a container which is not included in the weighing data.

Re-zeroTo set the display to zero.

GLP

Good Laboratory Practice.

Repeatability

Variation in measured values obtained when the same weight is placed and removed
repetitively. Usually expressed as a standard deviation.
e.g. Standard deviation=1 digit: This means that the measured values fall within ±1
digit at a probability of about 68%.

Stabilization time Time required after a sample being placed, until the stabilization indicator illuminates
and the weighing data is displayed.
Sensitivity drift

An affect that a change in temperature causes to the weighing data. Expressed as
temperature coefficient.
e.g. Temperature coefficient = 2 ppm/°C : If a load is 100 g and the temperaturechanges by 10°C, the value displayed changes by the following value.
0.0002%/°C x 10°C x 100 g = 2 mg

39

MEMO

40

MEMO

41

MEMO

42

THIS PAGE INTENTIONALLY LEFT BLANK.

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