Micro Analytical Balances

BMSeries

Built-in Fanless Ionizer!

www.aandd.jp

How to Eliminate the Greatest Enemyof Precision Weighing
The performance of micro analytical balances can be worsened by even the slightest
of disturbances, and among others, static electricity is known to be especiallytroubling for many users. The BM series from A&D provides various means to help
you perform such sensitive measurements with simplicity and accuracy, including abuilt-in fanless ionizer for quick and easy removal of static electricity.

Problems due to static electricity
An electrostatically charged object induces the opposite charge in nearby objects.
The resulting attraction will make stable measurement extremely diﬃcult.

1

Error when weighing a charged object
The object will appear heavier. The value then changes
as static is dissipated into the air or via the weighing pan.

2Error when a charged object approaches
Static attraction can pull the weighing pan in theopposite direction and cause values to drift.

Filter papers, disposable weigh boats, and plastic centrifuge containers can all
become charged just from normal handling. Charged powders can be displaced,causing cross-contamination.

Built-in fanless ionizer ◆◆ Patented

Simply hold the sample in front of the ionizer for a second or two to make sure that it is free ofstatic before starting measurement.
■ Direct-current (DC) method
The ionizer of the BM series doesn’t use a fan to deliver ions and thus causes no breeze, which allows
neutralization of even extremely ﬁne powders without disturbance.
■ Long life and high maintainability
The discharge electrode pins of the ionizer can be used continuously for approx. 10,000 hours. Each pin
also has a protector for safe cleaning or replacement.

Built-in fanless ionizer
1Discharge electrode units

The green LED is lit
while the ionizer is ON.

•••••••••••••••••••••••••••

•••••

•••••

••••

Antistatic glass panes

Coated with transparent
evaporated metal to block
static from outside, such as
charged clothing in dry
winter conditions••••••••••••••••••••

Just press the ION key toswitch on the ionizer. The“ION” mark blinks on thedisplay.

The plate in the middle canbe removed to create a larger
space (not advisable for 0.001
mg models).

Making the world of micrograms accessible to all users ..............
The BM series includes four models that display weight values with a readability of 0.001 mg;
namely, BM-5, BM-5D, BM-20 and BM-22. These models are ideally suited for weighing samples
for componential (quantitative, elemental, etc.) analyses, environmental analyses, or otherapplications that similarly require extremely ﬁne weight measurements.

BM-5 5.2 g × 0.001 mg (σ = 0.0012 mg*1)
Of the four models, the BM-5 features the highest
stability and repeatability, and is therefore
recommended for most users. With an adequateinstallation environment and operation, it canrealize the minimum weight of no more than 2 mg
in accordance with the United States Pharmacopeia(USP), Chapter 41.

BM-20 22 g × 0.001 mg (σ = 0.0025 mg*1)
The BM-20 is suitable for users who require a larger capacity for weighing samples directly into
heavy receptacles. Its stability and repeatability are also excellent, though not as high as those ofthe BM-5.

*1 Repeatability speciﬁcation for 1 g weight2

BM-22 5.1 g/22 g × 0.001 mg/0.01 mg (σ = 0.004 mg*1)
The BM-22 is a smart-range model.*2 While being slightly lower instability and repeatability (and therefore more aﬀordable) thanthe BM-20, it still provides suﬃcient room for tare.

BM-5D 2.1 g/5.2 g × 0.001 mg/0.01 mg (σ = 0.004 mg*1)
The BM-5D, another smart-range model,*2 has the same
repeatability speciﬁcation as the BM-22, but a smaller capacity.
Accordingly, it is the most budget-friendly model of the four.
speciﬁcation for 1 g weight*12 Repeatability
The readability will switch to 0.01 mg automatically when the display value exceeds* 2.1 g (BM-5D) or 5.1 g (BM-22) but returns to 0.001 mg by pressing the RE-ZERO key.

Ensuring accuracy and precision ...................................................
Motor-driven internal weight
All the models in the BM series are equipped with an internal weight for sensitivity adjustment,
which allows any user to make certain that the balance always stays accurate and precise
without any hassles.
■ One touch sensitivity adjustment
You can adjust sensitivity quickly and correctly any time with just one key press. For the 0.001 mg
models, it can also be useful for a simple check of the environmental conditions at the time.*3■ AD-Just – Automatic self-sensitivity adjustment
The balance can be set to start internal adjustment automatically when it detects a change in ambient
temperature to prevent errors due to sensitivity drift.
■ Calibration test report
For daily accuracy checks and documentation, the balance is capable of testing for errors (without
making any sensitivity adjustment) using its internal weight, and outputting the result.
■ Internal weight value correction
In cases such as where the internal weight value varied over time, it can be corrected using an external
weight that you have as a reference.
■ Automatic repeatability test
It is possible to have the balance measure the mass of its internal weight 10 times and calculate thestandard deviation to show repeatability under the given environment. This can also be easily included
in your balance management SOPs for daily precision check.
If internal sensitivity adjustment takes longer than usual, it is a sign that there is something wrong*3 withthe measurement environment, and it would be best to delay the measurement until a later time.

Automatic response characteristics adjustment
The BM series automatically selects and sets the optimal combination of weighing speed andstability*4 (FAST, MID or SLOW) by analyzing the inﬂuence of external disturbances such asdrafts and vibrations on the stability of the display value at the location. Alternatively, the setting
can be conﬁgured manually.
weighing speed and stability are in a trade-oﬀ relationship. The slower*4 Thethe weighing speed, the more stable the display becomes.

3Managing data and compliance ......................................................
User access control (UAC) and key lock to prevent misuse
The balance can be password-protected in two ways: The ﬁrst way is to limit use to authorizedindividuals (up to 11 including one administrator—the administrator can perform all operations
while other users are limited to measurements and sensitivity adjustments*5 only) by setting apassword for each user. The second way is to set a password just for the administrator, allowing
anyone else to use the balance without entering a password, but for measurements andsensitivity adjustments*5 only.
Meanwhile, upon receiving a command to disable its keys, the balance becomes operable only bysending commands from an external device such as a PC.

*5 The administrator can also restrict sensitivity adjustment so that others can perform measurements only.

GLP/GMP/GCP/ISO compliant output

For documentation requirements, the balance manufacturer, model, serial number, ID number(eight alphanumeric characters set by the user), date + time,*6 space for signature for calibration
report, calibration test report, and title & end blocks for a series of weighing results can be output.
the AD-8127 compact printer is used, it is possible to use its clock & calendar function*6 Wheninstead of the balance's to print date + time. This allows you to prevent falsiﬁcation of theData memory

timestamp using the password lock function on the printer side as you prefer.

The BM series can store up to 200 weighing results (or 100 with timestamp) or the 50 latest
sensitivity adjustment/calibration test results without requiring external memory devices such asa PC. The stored data can be output to a printer or PC in one batch.

Quick USB and RS-232C as standard interfaces
Quick USB enables readily sending data to Microsoft Excel, Word, Notepad, etc., in the samemanner as keyboard input, requiring no driver software installation.* 7 RS-232C allows
bi-directional serial communication (i.e. sending data and receiving commands) with a PC,*8
printer or other peripheral device. Via these interfaces, two diﬀerent devices (e.g. PC and remotecontroller) can be connected simultaneously.
An Ethernet (TCP/IP) interface (BM-08) is available as an option and can be installed in place ofQuick USB.
7 The communication is from the balance to the PC only. A USB cable (approx. 1.8 m) is also provided as standard.

*8 For connection to a USB port, an RS-232C/USB converter with cable (AX-USB-9P) is separately available.
*Providing simple but practical solutions for usability ................
Reverse backlit LCD display
The contrast of the black and white display
provides excellent visibility even in dim light andprevents eye fatigue.

Interlockable sliding doors
It is possible to slide a door open using the handle
on the opposite side. Eﬀective use of both hands
lets you perform weighing more eﬃciently.
••••••••••••••••••••••••••••••••••••••••••The “door” sign will not
disappear until the two side
doors are completely closed.

4

Standard & highly recommended accessories
The BM series comes standard with various accessories that facilitate your workﬂows. There arealso optional accessories that greatly help improve the stability of microgram weighing and are
therefore suggested especially for the BM-5/5D/20/22.
■ Standard for all models

Micro spatula

Cleaning brushes (large and small)

Dust cover for storage (AX-BM-033)■ Standard for the 0.001 mg models (BM-5/5D/20/22)
The AD-1676 shields the balance from air and/or
temperature disturbances caused by air conditioning,people passing by, the operator's breath, body heat, etc.
The panes are made of antistatic acrylic. Strongly
recommended for even the 0.01 mg models.
Tabletop breeze break (AD-1676)

368 (W) × 514 (D) × 350 (H) mm (incl. the handles)

Aluminum analytical pans
(10 pcs each)*9

Weighing pans for particulatematter (PM) ﬁlters

Ø8 mm (0.05 ml) / Ø12 mm (0.3 ml) / Ø15 mm (0.8 ml)

Ø50 mm / Ø95 mm

Microtube holder (AX-BM-032)*10
Ø12 mmEach size can also be purchased separately (in a set of 100).
*910 Theof this holder is heavier than the standard weighing pan by approx.
* 2 g, weightleaving only approx. 3 g for weighing (including both the microfuge tube

Tweezers for calibration weight(AX-TWEEZERS-25)

and sample) with the BM-5/5D. For the BM-252/200/300/500, please use theseparately-sold AX-BM-034.

■ Standard for the 0.01/0.1 mg models (BM-252/200/300/500)

Weigh boat (10 pcs)
Antistatic, 10 ml

Tweezers for calibration weight(AD-1689)■ Optional
The AD-1671 isolates the balance from minute vibrations caused by
nearby traﬃc, movement of people, handcarts, etc., which are often
imperceptible to humans but can seriously destabilize measurements.
Anti-vibration table (AD-1671)
460 (W) × 400 (D) × 71 (H) mm

5

Speciﬁcations
Models

BM-5

BM-5D

BM-20

BM-22

Capacity

5.2 g

2.1 g / 5.2 g*i

22 g

5.1 g / 22 g*i

Readability
Repeatability (standard deviation)
Minimum weight*ii (typical)
Linearity
Stabilization time (typical when set to FAST)

0.001 mg0.001 mg / 0.01 mg

0.001 mg0.001 mg / 0.01 mg

0.0012 mg (for 1 g)

0.004 mg (for 1 g)/ 0.01 mg

0.0025 mg (for 1 g)

0.004 mg (for 1 g)/ 0.01 mg

2.0 mg5.0 mg

3.0 mg5.0 mg±0.010 mg±0.010 mg / ±0.02 mg±0.010 mg±0.010 mg / ±0.02 mg

Approx. 10 secs / 8 secs

Approx. 10 secs

Approx. 10 secs / 8 secs

Approx. 10 secs

Sensitivity drift±2 ppm/°C (10 to 30 °C/50 to 86 °F, when automatic self calibration is OFF)

Operating environment

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

Display refresh rate
Units of measure*iii
Counting mode
Percent mode

5 times/sec or 10 times/sec
mg (milligram), g (gram), oz (ounce), ozt (troy ounce), ct (metric carat), mom (momme), dwt (pennyweight), gr (grain),pcs (counting mode), % (percent mode), and SG (density mode)

Minimum unit mass

0.1 mgNumber of samples

10, 25, 50 or 100 pieces

Minimum 100% reference mass

10.0 mg% readability

0.01%, 0.1%, 1% (depends on the reference mass stored)

Communication interface

Applicable weight value for sensitivity
adjustment

RS-232C and Quick USB
20 g

20 g

5g

5g

10 g

10 g

2g

2g

5g

5g

1g

1g

2g

2g

1g

1g

Weighing pan size

Ø25 mmExternal dimensions

259 (W) × 466 (D) × 326 (H) mm

Net weightApprox. 10 kg

Power supply / consumption

AC adapter / approx. 30 VA
AD-1676 tabletop breeze break (medium) × 1, Special pans (Ø50 mm and Ø95 mm) for weighing PM ﬁlters × 1

Standard accessories

each, Three sizes of aluminum analytical pans × 10 each, AX-BM-032 microtube holder × 1, AX-TWEEZERS-25
tweezers for calibration weight × 1, AX-BM-033 dust cover for storage × 1, Micro spatula × 1, Large and small
cleaning brushes × 1 each

Models

BM-252

BM-200BM-300BM-500Capacity

250 g

220 g

320 g

520 g

Readability

0.01 mg

Repeatability (standard deviation)
Minimum weight*ii (typical)
Linearity

0.1 mg
120 mg20 mg±0.2 mg±0.10 mg

Stabilization time (typical when set to FAST)±0.5 mg±2 ppm/°C (10 to 30 °C/50 to 86 °F, when automatic self calibration is OFF)

Operating environment

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

Display refresh rate
Units of measure*iii

Percent mode

±0.3 mgApprox. 3.5 secs

Approx. 8 secs

Sensitivity drift

Counting mode

0.2 mg

0.1 mg0.03 mg (for 100 g)

5 times/sec or 10 times/sec
mg (milligram), g (gram), oz (ounce), ozt (troy ounce), ct (metric carat), mom (momme), dwt (pennyweight), gr (grain),pcs (counting mode), % (percent mode), and SG (density mode)

Minimum unit mass

0.1 mgNumber of samples

10, 25, 50 or 100 pieces

Minimum 100% reference mass

10.0 mg% readability

0.01%, 0.1%, 1% (depends on the reference mass stored)

Communication interface

RS-232C and Quick USB
200 g

Applicable weight value for sensitivity
adjustment

100 g

200 g

50 g

100 g

20 g

50 g

300 g
200 g
100 g
50 g

10 g
Weighing pan size

Ø90 mmExternal dimensions

259 (W) × 466 (D) × 326 (H) mm

Net weight

300 g
200 g
100 g
50 g

Approx. 10 kg

Power supply / consumption
Standard accessories

500 g

AC adapter / approx. 30 VA
Weigh boat (antistatic, 10 ml) × 10, AD-1689 tweezers for calibration weight × 1,AX-BM-033 dust cover for storage × 1, Micro spatula × 1, Large and small cleaning brushes × 1 eachfunction: The readability will switch to 0.01 mg automatically when the display value exceeds 2.1 g (BM-5D) or 5.1 g (BM-22)*i Smart-range
but returns to 0.001 mg by pressing the RE-ZERO key.
Pursuant to the United States Pharmacopeia (USP), Chapter 41*iiiii Either
tael (Singapore/HK jewelry/Taiwan/China) or tola can be added upon request.
*6

Options||||||||||||||||||||||||||||||||||||||||||||
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BM-08
BM-014

Ethernet (TCP/IP) interface*iv
Pipette accuracy testing kit*v
BM-08 and Quick USB (standard) cannot be used at the same time.
*ivv Cannot
be used with the BM-5/5D.
*BM-014 pipette accuracy testing kit
The kit includes everything required for testing pipetteaccuracy (systematic error) and reproducibility(random error) quickly and easily by yourself.

Accessories|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

AD-1653
AD-1671
AD-1676
AD-1682
AD-1684A
AD-1687
AD-1688
AD-1689
AD-8127
AD-8526
AD-8920A
AD-8922A
AX-BM-031
AX-BM-032AX-BM-033
AX-BM-034
AX-BM-035
AX-BM-NEEDLESET
AX-CLEANING-SET
AX-HOLDER-SET-B
AX-ROUND-PAN-L
AX-ROUND-PAN-M
AX-ROUND-PAN-S
AX-SPATULA
AX-SW137-PRINT
AX-SW137-REZERO
AX-TRAY-10ML
AX-TWEEZERS-25
AX-USB-9P

Density determination kit (for the BM-252/200/300/500 only)
Anti-vibration table for balances
Tabletop breeze break (medium)
Rechargeable battery unit
Electrostatic ﬁeld meter
Weighing environment logger
Weighing data logger
Tweezers for calibration weight*vi
Compact printerRS-232C/Ethernet (TCP/IP) converter
Remote display
AD-1687 weighing environment logger
Remote controller
The AD-1687 simultaneously logs temperature,
Display covers (5 pcs)
humidity, barometric pressure, and vibration with
Microtube holder for the BM-5/5D/20/22*vii
weighing data from the balance.
Dust cover for storage
Microtube holder for the BM-252/200/300/500
Slide breeze break (for the BM-5/5D/20/22 only)
Discharge electrode units for the ionizer (a set of 4 pcs)
Balance cleaning set (large and small brushes and a chamois leather)
Sample cup holder set (antistatic)
Round aluminum analytical pans (Ø15 mm, 0.8 ml, 100 pcs)
Round aluminum analytical pans (Ø12 mm, 0.3 ml, 100 pcs)
Round aluminum analytical pans (Ø8 mm, 0.05 ml, 100 pcs)
Micro spatulas (5 pcs)
Foot switch for PRINT (with connector)
Foot switch for RE-ZERO (with connector)
Weigh boats (antistatic, 10 ml, 250 pcs)
Tweezers for calibration weight (recommended for use with the BM-5/5D/20/22)
RS-232C/USB converter with cable
is recommended for the BM-5/5D/20/22.
*vivii AX-TWEEZERS-25
The weight of this holder is heavier than the standard weighing pan by approx. 2 g, leaving only
* approx. 3 g for weighing (including both the microfuge tube and sample) with the BM-5/5D.

Internal Weight

ReverseBacklit LCD

Bi-directional/
Quick USB

RS-232C
Interface

User AccessControl

GLP
Compliant

Date & Time

Data Memory
Function

Optional
Countingwith ACAI

Percentage
Function

AutoPower ON

Underhook

StaticEliminator

Ethernet(TCP/IP)Interface

A&D Company, Ltd. (JAPAN)

A&D Korea Ltd. (South Korea)

A&D Engineering, Inc. (USA)A&D Rus Co., Ltd. (Russia)

A&D Australasia Pty Ltd. (Australia)

A&D Instruments India (P) Ltd. (India)

A&D Instruments Ltd. (United Kingdom)

A&D Scientech Taiwan Ltd. (Taiwan)<German Sales Office>A&D Instruments Thailand Ltd. (Thailand)

URL: aandd.jp

URL: andonline.com

URL: andaustralasia.com.au
URL: andprecision.com
URL: andprecision.com

URL: andk.co.kr
URL: and-rus.ru

URL: aanddindia.in

URL: aandd.com.tw

URL: thai.andprecision.com* BM-ADCC-08-PR8-242