A&D BM-20 User manual

Analytical Balance
BM-20
BM-22
BM-252
BM-200
BM-300
BM-500
1WMPD4002195B

© 2013A&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 ofA&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.
Windows, Word and Excel are registered trademarks of the Microsoft Corporation.

BM series 1
Contents
Basic Operation
1. Introduction..............................................................................................................................3
1.1. Features...............................................................................................................................4
1.2. Compliance..........................................................................................................................5
2. Unpacking The Balance..........................................................................................................6
3. Installing The BalanceAnd Precautions.................................................................................8
3.1. Installing The Balance .........................................................................................................8
3.2. Precautions Before Use (Environmental ConditionAnd Preparations)............................10
3.3. Cautions During Use (For Precision Weighing)................................................................ 11
3.4. CautionsAfter Use (Management Of The Balance) .........................................................12
3.5. Cautions For Power Supply...............................................................................................12
4. Display SymbolsAnd Key Operation....................................................................................13
5. Weighing Units......................................................................................................................14
5.1. Units...................................................................................................................................14
5.2. StoringActive Units............................................................................................................17
5.3. Selecting UnitAnd Weighing Mode...................................................................................18
6. Weighing................................................................................................................................20
6.1. Basic Operation (Gram Mode)..........................................................................................20
6.2. Smart Range For BM-22...................................................................................................21
6.3. Counting Mode (PC)..........................................................................................................22
6.4. Percent Mode (%)..............................................................................................................24
6.5. Built-in DC Static Eliminator (Neutralization Device).........................................................25
6.6. Monitoring Clock and Environmental Sensors..................................................................27
6.7. Repeatability Test...............................................................................................................28
Adapting To The Environment
7. ResponseAdjustment...........................................................................................................29
7.1. Automatic ResponseAdjustment......................................................................................29
7.2. Manual ResponseAdjustment ..........................................................................................30
8. Calibration (ToAdjust The Weighing Value)..........................................................................31
8.1. Calibration Group...............................................................................................................31
8.2. Automatic Self Calibration (For variation of ambient temperature)...................................32
8.3. One-Touch Calibration (For Common Use)......................................................................32
8.4. Calibration Test Using the Internal Mass...........................................................................33
8.5. Calibration UsingAn External Weight ...............................................................................34
8.6. Calibration Test UsingAn External Weight........................................................................35
8.7. Correcting The Internal Mass Value..................................................................................36
9. Function SwitchAnd Initialization..........................................................................................37
9.1. Permit Or Inhibit.................................................................................................................37
9.2. Initializing The Balance......................................................................................................38
Selecting Functions
10. Function Table.......................................................................................................................39
10.1. Setting The Function Table................................................................................................39
10.2. Details Of The Function Table...........................................................................................41

2 BM series
10.3. Description Of The Class "Environment, Display".............................................................43
10.4. Description Of The Item "Data Output Mode"...................................................................45
10.5. Description Of The Item "Data Format".............................................................................46
10.6. Data Format Examples......................................................................................................49
10.7. ClockAnd Calendar Function............................................................................................51
11. ID NumberAnd GLP Report.................................................................................................52
11.1. Setting The ID Number......................................................................................................52
11.2. GLP Report........................................................................................................................53
12. Data Memory.........................................................................................................................58
12.1. Notes On Using Data Memory..........................................................................................58
12.2. Data Memory For Weighing Data......................................................................................59
12.3. Data Memory For CalibrationAnd Calibration Test...........................................................62
13. Underhook.............................................................................................................................63
14. Density Measurement (Specific gravity)..............................................................................64
15. Password Function................................................................................................................67
15.1. Using Password Function..................................................................................................67
15.2. Changing Password..........................................................................................................68
15.3. Inputting Password When Turning On The Balance.........................................................69
15.4. Missing Password..............................................................................................................69
Interface And Communication
16. Standard InputAnd Output Interface.....................................................................................70
16.1. RS-232C Interface.............................................................................................................70
16.2. Connection To Peripheral Equipment................................................................................71
16.3. Commands........................................................................................................................74
Maintenance
17. Maintenance..........................................................................................................................79
17.1. Treatment Of The Balance................................................................................................79
17.2. Error Codes .......................................................................................................................79
17.3. Other Display.....................................................................................................................81
17.4. Checking The Balance PerformanceAnd Environment ...................................................82
17.5. Asking For Repair..............................................................................................................82
18. Specifications ........................................................................................................................83
18.1. External Dimensions..........................................................................................................84
18.2. OptionsAnd Peripheral Equipment...................................................................................85
19. Terms/Index...........................................................................................................................89
19.1. Terms.................................................................................................................................89
19.2. Index..................................................................................................................................90

BM series 3
1. Introduction
This manual describes how the BM series balances work and how to get the most out of them in
terms of performance. Read this manual thoroughly before using the balance and keep it at hand
for future reference.
About This Manual
This manual consists of the following five parts:
Basic operation .............................. Describes precautions, the balance's construction and basic
operation.
Adapting to the environment........... Describes response (and stability) adjustment to adapt to the
environment where there is vibration or drafts, the way to
maintain weighing precision in a variation of ambient
temperature, calibration and calibration test.
Selecting functions.......................... Describes functions of the balance.
Interface and communication.......... Describes the serial interface used for communicating with a
computer that requests weighing data and controls the
balance, and for use with a printer
Maintenance .................................. Describes maintenance, error codes, troubleshooting,
specifications and options.

4 BM series
1.1. Features
A built-in DC static eliminator can eliminate static electricity from the weighing sample before the
measurement, reducing weighing error.
Each electrode unit of the eliminator is designed to be removed, cleaned and replaced.
Automatic self calibration, using the internal mass, adapting to changes to temperature changes.
Response adjustment adapting to drafts and/or vibration automatically.
Memory function to store weighing data and calibration data.
When only weighing data is stored, a maximum of 200 data can be stored.
Interval mode to store the weighing data periodically.
Good laboratory practice (GLP) / Good manufacturing practice (GMP) data can be output using
the RS-232C serial interface.
A built-in clock and calendar that can add the time and date to the output data.
Underhook, for measuring density and weighing magnetic materials.
Multiple weighing units with most of the common units used around the world.
Gram, Milligram, Counting mode, Percent mode, Ounce (Avoir), Troy Ounce, Metric carat, Momme,
Pennyweight, Grain (UK), Tael (preset in the factory), Tola (India), Messghal, Density mode
BM-22 is equipped with a smart range function to weigh with the precision range (a higher
resolution) when zeroing a tare weight within the weighing capacity.
The test tube holder is included in the accessories of BM-20 and BM-22.
Density mode for calculating the density of a solid.
BM series balances are equipped with an RS-232C serial interface and a USB interface to
communicate with a computer. When printing data using the RS-232C interface, by using the USB
interface, the data can be transmitted to a computer at the same time. Communications between
the BM series balance using the RS-232C interface and a Windows computer using the Windows
communication tools software (WinCT) make building a system very easy.
Connecting the USB interface of the balance, by cable to a Windows computer, allows
transmission of the weighing data to Excel or Word.
When multiple balances have the BM-08 Ethernet interface installed in place of the USB interface
and connected to a LAN, data can be acquired from each of them using the WinCT-Plus software.
The weighing data can be stored by connecting the accessory data logger (AD-1688) directly,
when not using a computer.

BM series 5
1.2. Compliance
1.2.1. Compliance With FCC Rules
Please note that this equipment generates, uses and can radiate radio frequency energy. This
equipment has been tested and has been found to comply with the limits of a Class A computing
device pursuant to Subpart J of Part 15 of FCC rules. These rules are designed to provide
reasonable protection against interference when 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.)
1.2.2. Compliance With EMC Directives
This device features radio interference suppression and safety regulation in compliance
with the following Council Directives
Council directive 2004/108/EC EN61326 EMC directive
Council directive 2006/95/EC EN60950 Safety of Information Technology Equipment
The CE mark is an official mandatory European marking.
Please note that any electronic product must comply with local laws and regulations when sold or
used anywhere outside Europe.

6 BM series
2. Unpacking The Balance
Unpack the balance carefully. Keep the packing material to be used for transporting the balance
in the future. See the illustrations to confirm that everything is contained.
Parts For Each Products
BM-22, BM-20
BM-252
BM-500, BM-300,
BM-200
Small weighing Large weighing
pan for filter pan for filter
Weighing pan Pan support
Test tube holder
Small fine range ring
Fine range ring
Tweezers
Dust plate AX-MX-36
φ15, 0.8 φ12, 0.3 φ8, 0.05
Large Medium Small
Round aluminum analytical pans ( each 10 pieces )
Weighing pan Pan support
Fine range ring
Breeze break ring
Dust plate
Weighing pan
Pan support
Breeze break ring
Dust plate
Common Parts
AC adapter AC adapter labels
Note Windows communication software (WinCT)
Please confirm that the AC adapter type is
correct for your local voltage and receptacle type.
Data logger
AD-1688
The weighing data can be
stored when connecting
the data logger directly.
USB cable Display cover
Separation plate
If unnecessary, remove it.
Tweezers
AD-1689
Tweezers for handling a weight.
Use it to avoid temperature changes
due to having your hand in the
weighing chamber, thus to perform
accurate calibration.
D-sub 9pins
Position of placing
AC adapter labels

BM series 7
Grounding terminal
Anti theft device
AC adaptor jack
USB interface
External key jack
Cap the terminal with accessory
rubber cap when it is not used.
Serial interface RS-232C
D-sub 9
p
ins
The DC Static eliminator
Electrode units of the
DC static eliminator
Separation plate
If unnecessary, remove it.
J
oint handle
When jointing the right (left) slide
door handle, the right (left) glass
door can be opened or closed
with the left (right) joint handle.
Bubble spirit level
Leveling foot
Glass door handle
The handle for the glass door.
The handle can be joined to the joint handle
Neutralization
area
Glass door handle
Display cover
LED of the static eliminator
Example of BM-20
Weighing
chamber
Display
Keys

8 BM series
3. Installing The Balance And Precautions
3.1. Installing The Balance
Step 1 Refer to "3.2. Precautions Before Use (Environmental Condition And Preparations)"
concerning the place to install the balance. Place the balance on a firm weighing table.
Step 2 Assemble the weighing pan and other parts in the weighing chamber, in accordance with the
product type and use.
BM-500, BM-300, BM-200 BM-252
BM-22, BM-20
Fine range ring
Weighing pan
Breeze break ring
Dust plate
Pan support
Use the fine range ring to avoid errors caused by drafts
when weighing with a minimum display of 0.01 mg.
Pan support
Weighing pan
Small fine range ring
Dust plate
Fine range ring
Large weighing pan for filter
Small weighing pan for filter
Choose the weighing pan to
adapt to the filter size.
Test tube holder
Use the holder for
micro tube or test
tube of φ12 mm
or less.