Metrohm 728 User manual

728 Magnetic Stirrer
Manual
8.728.8001EN

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
728 Magnetic Stirrer
Manual
8.728.8001EN 03.2013 fpe

Teachware
Metrohm AG
CH-9100 Herisau
[email protected]
This documentation is protected by copyright. All rights reserved.
Although all the information given in this documentation has been
checked with great care, errors cannot be entirely excluded. Should you
notice any mistakes please send us your comments using the address
given above.
Documentation in additional languages can be found on
http://documents.metrohm.com.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.1.1 Model versions ........................................................................ 1
1.1.2 Connectors .............................................................................. 1
1.1.3 Intended use ........................................................................... 1
1.2 About the documentation ................................................... 2
1.2.1 Symbols and conventions ........................................................ 2
1.3 Safety instructions ................................................................ 3
1.3.1 General notes on safety ........................................................... 3
1.3.2 Electrical safety ........................................................................ 3
1.3.3 Tubing and capillary connections ............................................. 4
1.3.4 Flammable solvents and chemicals ........................................... 4
1.3.5 Recycling and disposal ............................................................. 4
2 Overview of the instrument 6
3 Installation 8
3.1 Setting up the instrument .................................................... 8
3.1.1 Packaging ................................................................................ 8
3.1.2 Checks .................................................................................... 8
3.1.3 Location .................................................................................. 8
3.2 Installing the magnetic stirrer ............................................. 8
3.3 Connecting the magnetic stirrer .......................................... 8
4 Operation and maintenance 9
4.1 General notes ........................................................................ 9
4.1.1 Care ........................................................................................ 9
4.1.2 Maintenance by Metrohm Service ............................................ 9
4.2 Quality Management and qualification with Metrohm .. 10
5 Technical specifications 11
5.1 Magnetic stirrer .................................................................. 11
5.2 Power supply ...................................................................... 11
5.3 Interfaces and connectors ................................................. 11
5.4 Safety specifications ........................................................... 11
5.5 Electromagnetic compatibility (EMC) ................................ 12
5.6 Ambient temperature ......................................................... 12
5.7 Reference conditions .......................................................... 12

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
5.8 Dimensions/material ........................................................... 13
6 Warranty (guarantee) 14
7 Accessories 16
7.1 Scope of delivery per model version ................................. 16
7.1.1 728 Magnetic Stirrer .............................................................. 16
7.1.2 728 Magnetic Stirrer with 115 V US power supply unit .......... 17
7.1.3 728 Magnetic Stirrer with 230 V EURO power supply unit ..... 18
7.1.4 728 Magnetic Stirrer with 115 V US power supply unit and
stand ..................................................................................... 18
7.1.5 728 Magnetic Stirrer with 230 V EURO power supply unit
and stand .............................................................................. 20
7.1.6 728 Magnetic Stirrer complete for Titrino/Dosimat ................. 21
7.2 Optional accessories ........................................................... 22
7.2.1 728 Magnetic Stirrer .............................................................. 22
Index 24

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front ................................................................................................. 6
Figure 2 Rear with stand ................................................................................. 7

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 728 Magnetic Stirrer with base plate, support rod and electrode
holder supplements Titrino and Dosino units.
1.1.1 Model versions
The 728 Magnetic Stirrer is available in the following six versions:
2.728.0010 728 Magnetic Stirrer
2.728.0021 728 Magnetic Stirrer With 115 V US power
supply unit
2.728.0024 728 Magnetic Stirrer With 230 V EURO power
supply unit
2.728.0031 728 Magnetic Stirrer With 115 V US power
supply unit and stand
2.728.0034 728 Magnetic Stirrer With 230 V EURO power
supply unit and stand
2.728.0040 728 Magnetic Stirrer Complete for Titrino/Dos-
ino
Each version includes different accessories according to its use (see Chap-
ter 7, page 16).
1.1.2 Connectors
The 728 Magnetic Stirrer needs 5 to 12 V DC voltage.
The 728 Magnetic Stirrer is supplied with power via a direct connection to
a Titrino, Dosino or via a power supply unit.
1.1.3 Intended use
The 728 Magnetic Stirrer is designed for usage in analytical laboratories.
This instrument is suitable for stirring chemicals and flammable samples.
Usage of the 728 Magnetic Stirrer therefore requires the user to have
basic knowledge and experience in handling toxic and caustic substances.
Knowledge with respect to the application of the fire prevention measures
prescribed for laboratories is also mandatory.

1.2 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
1.2 About the documentation
CAUTION
Please read through this documentation carefully before putting the
instrument into operation. The documentation contains information
and warnings which the user must follow in order to ensure safe opera-
tion of the instrument.
1.2.1 Symbols and conventions
The following symbols and formatting may appear in this documentation:
Cross-reference to figure legend
The first number refers to the figure number, the sec-
ond to the instrument part in the figure.
Instruction step
Carry out these steps in the sequence shown.
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Next] Button or key
Warning
This symbol draws attention to a possible life hazard
or risk of injury.
Warning
This symbol draws attention to a possible hazard due
to electrical current.
Warning
This symbol draws attention to a possible hazard due
to heat or hot instrument parts.
Warning
This symbol draws attention to a possible biological
hazard.
Caution
This symbol draws attention to a possible damage of
instruments or instrument parts.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 3
Note
This symbol marks additional information and tips.
1.3 Safety instructions
1.3.1 General notes on safety
WARNING
This instrument may only be operated in accordance with the specifica-
tions in this documentation.
This instrument has left the factory in a flawless state in terms of technical
safety. To maintain this state and ensure non-hazardous operation of the
instrument, the following instructions must be observed carefully.
1.3.2 Electrical safety
The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.
WARNING
Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
WARNING
Never open the housing of the instrument. The instrument could be
damaged by this. There is also a risk of serious injury if live components
are touched.
There are no parts inside the housing which can be serviced or replaced
by the user.
Mains voltage
WARNING
An incorrect mains voltage can damage the instrument.
Only operate this instrument with a mains voltage specified for it (see
rear panel of the instrument).

1.3 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
Protection against electrostatic charges
WARNING
Electronic components are sensitive to electrostatic charges and can be
destroyed by discharges.
Do not fail to pull the mains cable out of the mains connection socket
before you set up or disconnect electrical plug connections at the rear
of the instrument.
1.3.3 Tubing and capillary connections
CAUTION
Leaks in tubing and capillary connections are a safety risk. Tighten all
connections well by hand. Avoid applying excessive force to tubing
connections. Damaged tubing ends lead to leakage. Appropriate tools
can be used to loosen connections.
Check the connections regularly for leakage. If the instrument is used
mainly in unattended operation, then weekly inspections are manda-
tory.
1.3.4 Flammable solvents and chemicals
WARNING
All relevant safety measures are to be observed when working with
flammable solvents and chemicals.
￭Set up the instrument in a well-ventilated location (e.g. fume cup-
board).
￭Keep all sources of flame far from the workplace.
￭Clean up spilled liquids and solids immediately.
￭Follow the safety instructions of the chemical manufacturer.
1.3.5 Recycling and disposal
This product is covered by European Directive 2002/96/EC, WEEE – Waste
from Electrical and Electronic Equipment.
The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 5
More details about the disposal of your old equipment can be obtained
from your local authorities, from waste disposal companies or from your
local dealer.

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6￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
2 Overview of the instrument
1
2
3
4
Figure 1 Front
1Sample space 2On/off signal light
3On/off switch 4Shift rate controller

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 7
12 3 4
Figure 2 Rear with stand
1Connector plug 2Stand clamping screw
3Stand 4Cable cut-out

3.1 Setting up the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
3 Installation
3.1 Setting up the instrument
3.1.1 Packaging
The instrument is supplied in highly protective special packaging together
with the separately packed accessories. Keep this packaging, as only this
ensures safe transportation of the instrument.
3.1.2 Checks
Immediately after receipt, check whether the shipment has arrived com-
plete and without damage by comparing it with the delivery note.
3.1.3 Location
The instrument has been developed for operation indoors and may not be
used in explosive environments.
Place the instrument in a location of the laboratory which is suitable for
operation, free of vibrations, protected from corrosive atmosphere, and
contamination by chemicals.
The instrument should be protected against excessive temperature fluctu-
ations and direct sunlight.
3.2 Installing the magnetic stirrer
The 728 Magnetic Stirrer is fastened to a support rod with a diameter of
10 mm.
3.3 Connecting the magnetic stirrer
Power supply
The 728 Magnetic Stirrer needs 5 to 12 V DC voltage.
It can be operated directly at a Metrohm instrument with a stirrer connec-
tor.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4 Operation and maintenance
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 9
4 Operation and maintenance
4.1 General notes
4.1.1 Care
The 728 Magnetic Stirrer requires appropriate care. Excess contamination
of the instrument may result in functional disruptions and a reduction in
the lifetime of the otherwise sturdy mechanics and electronics.
Spilled chemicals and solvents should be removed immediately. Above all,
the plug connections on the rear of the instrument (in particular the con-
nection socket) should be protected from contamination.
CAUTION
Although this is extensively prevented by design measures, the connec-
tion cable should be unplugged immediately if aggressive media have
found their way into the interior of the instrument to prevent serious
damage to the instrument electronics. In such cases, Metrohm Service
must be informed.
4.1.2 Maintenance by Metrohm Service
Maintenance of the 728 Magnetic Stirrer is best carried out as part of
annual service, which is performed by specialist personnel from Metrohm.
If working frequently with caustic and corrosive chemicals, a shorter main-
tenance interval could be necessary.
Metrohm Service offers every form of technical advice for maintenance
and service of all Metrohm instruments.

4.2 Quality Management and qualification with Metrohm ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
4.2 Quality Management and qualification with
Metrohm
Quality management
Metrohm offers you comprehensive support in implementing quality man-
agement measures for instruments and software. Further information on
this can be found in the brochure "Metrohm Quality Management"
available from your local Metrohm representative.
Qualification
Please contact your local Metrohm representative for support in qualifica-
tion of instruments and software. The Installation Qualification (IQ)
and Operational Qualification (OQ) are offered by Metrohm represen-
tatives as a service. They are carried out by trained employees using stan-
dardized qualification documents and in accordance with the currently
applicable requirements of the regulated industry. Further information on
this can be found in the brochure "Analytical Instrument Qualifica-
tion – Confidence in quality with IQ/OQ".
Maintenance
The electronic and mechanical functional groups of Metrohm instruments
can and should be checked by specialist personnel from Metrohm as part
of a regular preventive maintenance schedule. Please ask your local
Metrohm representative regarding the precise terms and conditions
involved in concluding a corresponding maintenance agreement. Further
information on this can be found in the brochure "Metrohm Care Con-
tracts – Protect your investment the smart way" available from your
local Metrohm representative.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Technical specifications
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 11
5 Technical specifications
5.1 Magnetic stirrer
Direction of rota-
tion
Counterclockwise
Rotational speed 200 - 1,900 rpm
5.2 Power supply
Power supply 5 - 12 V DC
Power consump-
tion
≤ 2.5 VA
5.3 Interfaces and connectors
The 728 Magnetic Stirrer does not have any control interfaces. It is oper-
ated and controlled via the power supply.
5.4 Safety specifications
This instrument fulfills the following electrical safety requirements:
CE marking in accordance with the EU directives:
￭2006/95/EC (Low Voltage Directive, LVD)
￭2004/108/EC (EMC Directive, EMC)
Design and testing ￭EN/IEC/UL 61010-1
￭CSA-C22.2 No. 61010-1
￭Protection class III
￭EN/IEC 60529
￭Degree of protection IP20
Safety instructions This document contains safety instructions which have to be followed
by the user in order to ensure safe operation of the instrument.

5.5 Electromagnetic compatibility (EMC) ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
5.5 Electromagnetic compatibility (EMC)
Emission
Standards ful-
filled
￭EN/IEC 61326-1
￭EN/IEC 61000-6-3
￭EN 55011 / CISPR 11
Immunity
Standards ful-
filled
￭EN/IEC 61326-1
￭EN/IEC 61000-6-2
￭EN/IEC 61000-4-2
￭EN/IEC 61000-4-3
￭EN/IEC 61000-4-4
￭EN/IEC 61000-4-5
￭EN/IEC 61000-4-6
￭EN/IEC 61000-4-11
￭EN/IEC 61000-4-14
￭EN/IEC 61000-4-28
5.6 Ambient temperature
Nominal function
range
+5 - +45 °C
Transport and
storage
–40 - +70 °C
5.7 Reference conditions
Ambient tempera-
ture
+25 °C (± 3 °C)
Relative humidity ≤ 60%