728 Magnetic Stirrer
Manual
8.728.8001EN
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
728 Magnetic Stirrer
8.728.8001EN
Manual
03.2013 fpe
Teachware
Metrohm AG
CH-9100 Herisau
teachware@metrohm.com
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.
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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
Table of contents
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
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5.5 Electromagnetic compatibility (EMC) ................................ 12
5.6 Ambient temperature ......................................................... 12
5.7 Reference conditions .......................................................... 12
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III
Table of contents
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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
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IV
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Table of figures
Figure 1 Front ................................................................................................. 6
Figure 2 Rear with stand ................................................................................. 7
Table of figures
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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:
1 Introduction
Each version includes different accessories according to its use (see Chapter 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.
2.728.0010
2.728.0021 728 Magnetic Stirrer With 115 V US power
2.728.0024 728 Magnetic Stirrer With 230 V EURO power
2.728.0031 728 Magnetic Stirrer With 115 V US power
2.728.0034 728 Magnetic Stirrer With 230 V EURO power
2.728.0040 728 Magnetic Stirrer Complete for Titrino/Dos-
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supply unit
supply unit
supply unit and stand
supply unit and stand
ino
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.
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1.2 About the documentation
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 operation 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 second to the instrument part in the figure.
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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.
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2
Caution
This symbol draws attention to a possible damage of
instruments or instrument parts.
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1.3 Safety instructions
1.3.1 General notes on safety
WARNING
This instrument may only be operated in accordance with the specifications 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.
1 Introduction
Note
This symbol marks additional information and tips.
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.
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Only operate this instrument with a mains voltage specified for it (see
rear panel of the instrument).
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1.3 Safety instructions
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.
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Check the connections regularly for leakage. If the instrument is used
mainly in unattended operation, then weekly inspections are mandatory.
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.
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The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.
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1 Introduction
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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2 Overview of the instrument
1
2
3
4
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Sample space
1
On/off switch
3
Figure 1 Front
On/off signal light
2
Shift rate controller
4
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6
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1 2 3 4
2 Overview of the instrument
Connector plug
1
Stand
3
Figure 2 Rear with stand
Stand clamping screw
2
Cable cut-out
4
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3.1 Setting up the instrument
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 complete 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.
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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 fluctuations 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 connector.
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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 connection socket) should be protected from contamination.
CAUTION
Although this is extensively prevented by design measures, the connection 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 Operation and maintenance
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 maintenance interval could be necessary.
Metrohm Service offers every form of technical advice for maintenance
and service of all Metrohm instruments.
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4.2 Quality Management and qualification with Metrohm
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4.2 Quality Management and qualification with
Metrohm
Quality management
Metrohm offers you comprehensive support in implementing quality management 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 qualification of instruments and software. The Installation Qualification (IQ)
and Operational Qualification (OQ) are offered by Metrohm representatives as a service. They are carried out by trained employees using standardized 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.
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5 Technical specifications
5.1 Magnetic stirrer
5 Technical specifications
Direction of rota-
Counterclockwise
tion
Rotational speed 200 - 1,900 rpm
5.2 Power supply
Power supply
Power consumption
5 - 12 V DC
≤ 2.5 VA
5.3 Interfaces and connectors
The 728 Magnetic Stirrer does not have any control interfaces. It is operated 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.
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5.5 Electromagnetic compatibility (EMC)
5.5 Electromagnetic compatibility (EMC)
Emission
Standards fulfilled
Immunity
Standards fulfilled
￭ EN/IEC 61326-1
￭ EN/IEC 61000-6-3
￭ EN 55011 / CISPR 11
￭ 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
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5.6 Ambient temperature
Nominal function
range
Transport and
storage
+5 - +45 °C
–40 - +70 °C
5.7 Reference conditions
Ambient temperature
Relative humidity ≤ 60%
+25 °C (± 3 °C)
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5.8 Dimensions/material
Width 90 mm
Height 76 mm
Depth 150 mm
Weight 660 g (without accessories)
Material
Housing, upper
part
Housing, bottom part
PBT
Steel sheet, stove-enameled
5 Technical specifications
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6 Warranty (guarantee)
Metrohm guarantees that the deliveries and services it provides are free of
defects in materials, design or manufacturing.
The general warranty period is 36 months (exclusions below) from the
date of delivery or 18 months in the event of continuous operation. The
warranty remains valid on the condition that the servicing is provided by a
service organization authorized by Metrohm at defined intervals and with
a defined scope.
The warranty period for anion suppressors of the type "MSM" is 120
months from the date of delivery or 60 months in the case of continuous
operation.
The warranty period for IC separation columns is 90 days after start-up.
For third-party components that are recognizable as such, the manufacturer's warranty regulations apply.
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Consumables and materials with limited storage life and glass breakage in
the case of electrodes or other glass parts are excluded from the warranty.
Warranty claims cannot be asserted if the ordering party has failed to
meet its payment obligations according to schedule.
During the warranty period, Metrohm undertakes either to replace free of
charge or to credit the purchaser for any modules or components that can
be shown to be faulty. Any transport or customs fees that may apply are
the ordering party’s responsibility.
The precondition for this is that the ordering party has to specify the article number, the article designation, an adequate error description, the
delivery date and (if applicable) the serial number or chip data in the Support Tracker. Metrohm then decides whether a replacement or a credit
note is to be issued or whether the faulty part has to be returned using
the Return Material Authorization (RMA). If a replacement or credit note is
issued, the ordering party undertakes to store the faulty part for at least
24 months in accordance with the current storage directives (in compliance with ESD guidelines) and to hold it in readiness for onsite inspection
or for return shipment to Metrohm. Metrohm reserves the right to invoice
the ordering party for these articles, including retroactively, in the event of
noncompliance with these preconditions.
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14
The same warranty periods that are specified for a corresponding new
part apply to parts that are replaced or repaired within the above-mentioned warranty periods. However, replacement or repair of a part does
not extend the warranty period of the entire system.
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6 Warranty (guarantee)
Deficiencies arising from circumstances that are not the responsibility of
Metrohm, such as improper storage or improper use, etc., are expressly
excluded from the warranty.
Metrohm also offers a 120 month spare parts availability guarantee and a
60 month PC software support warranty, calculated from the date on
which the product is withdrawn from the market. The content of this warranty is the ability of the customer to obtain functioning spare parts or
appropriate software support at market prices during the time of the warranty period.
If Metrohm AG is unable to meet this obligation due to circumstances
beyond the control of Metrohm AG, then the ordering party shall be
offered alternative solutions at preferential conditions.
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7.1 Scope of delivery per model version
7 Accessories
NOTE
Subject to change without notice.
7.1 Scope of delivery per model version
NOTE
After receiving the instrument, check the shipment to ensure that it is
complete. In doing so, check the version (order number) of your 728
Magnetic Stirrer.
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2.728.0010
Qty.
Order no. Description
1 1.728.0010 Magnetrührer
For mounting on a stand rod 10 mm dia.; without base plate (or
holder) and without stand rod; without power adapter, with fixed
connecting cable.
1 6.1903.030 Stirring bar / 25 mm
Stirring bar with magnetic core, PTFE covering, length 25 mm.
Material: PTFE
Outer diameter (mm): 5
Length (mm): 25
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Qty. Order no. Description
1 6.2108.100 Connection cable for 622/649/703/728, 0.5
m
For supplying power to 622, 649, 728 Stirrers and 703 Ti Stand from
control instruments and corresponding Dosimats
Length (m): 0.5
1 6.2108.110 Cable 622/649/703/728 / 1 m
For supplying power to 622, 649, 728 Stirrers and 703 Ti Stand from
control instruments and corresponding Dosimats
Length (m): 1
1 8.728.8001EN 728 Magnetic Stirrer Manual
7 Accessories
7.1.2 728 Magnetic Stirrer with 115 V US power supply unit
2.728.0021
Qty.
Order no. Description
1 1.728.0010 Magnetic Stirrer
1 6.1903.030 Stirring bar / 25 mm
Stirring bar with magnetic core, PTFE covering, length 25 mm.
Material: PTFE
Outer diameter (mm): 5
Length (mm): 25
1 6.2119.020 Mains adapter US 110V/9V DC
With US mains plug. Input: 220...240 V AC. For 622, 649, 722, 728
Stirrers or 727 Ti Stand. Output: 9 V DC/0.2 A
Length (m): 2
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7.1 Scope of delivery per model version
Qty. Order no. Description
1 8.728.8001EN 728 Magnetic Stirrer Manual
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7.1.3 728 Magnetic Stirrer with 230 V EURO power supply unit
2.728.0024
Qty. Order no. Description
1 1.728.0010 Magnetic Stirrer
1 6.1903.030 Stirring bar / 25 mm
Stirring bar with magnetic core, PTFE covering, length 25 mm.
Material: PTFE
Outer diameter (mm): 5
Length (mm): 25
1 6.2117.020 Power adapter EU 230 V / 9 V DC
With EU mains plug. Input: 220...240 V AC. For 622, 649, 722, 728
Stirrers, 727 Ti Stand or Spectrosense. Output: 9 V DC/0.2 A
Length (m): 2
1 8.728.8001EN 728 Magnetic Stirrer Manual
7.1.4 728 Magnetic Stirrer with 115 V US power supply unit and stand
2.728.0031
Qty.
Order no. Description
1 1.728.0010 Magnetic Stirrer
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728 Magnetic Stirrer
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Qty. Order no. Description
1 6.1903.030 Stirring bar / 25 mm
Stirring bar with magnetic core, PTFE covering, length 25 mm.
Material: PTFE
Outer diameter (mm): 5
Length (mm): 25
1 6.2013.010 Clamping ring
For support rods with a diameter of 10 mm.
Material: Metal
Width (mm): 20
Height (mm): 16
7 Accessories
1 6.2026.010 Support stand with support rod
Complete, with stand rod, total length 42 cm. Used with 649, 728
Magnetic Swing-out Stirrer alone (without Dosimat)
Width (mm): 166
Height (mm): 420
Outer diameter (mm): 10
Length (m): 166
1 6.2119.020 Mains adapter US 110V/9V DC
With US mains plug. Input: 220...240 V AC. For 622, 649, 722, 728
Stirrers or 727 Ti Stand. Output: 9 V DC/0.2 A
Length (m): 2
1 8.728.8001EN 728 Magnetic Stirrer Manual
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7.1 Scope of delivery per model version
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7.1.5 728 Magnetic Stirrer with 230 V EURO power supply unit and stand
2.728.0034
Qty. Order no. Description
1 1.728.0010 Magnetic Stirrer
1 6.1903.030 Stirring bar / 25 mm
Stirring bar with magnetic core, PTFE covering, length 25 mm.
Material: PTFE
Outer diameter (mm): 5
Length (mm): 25
1 6.2013.010 Clamping ring
For support rods with a diameter of 10 mm.
Material: Metal
Width (mm): 20
Height (mm): 16
1 6.2026.010 Support stand with support rod
Complete, with stand rod, total length 42 cm. Used with 649, 728
Magnetic Swing-out Stirrer alone (without Dosimat)
Width (mm): 166
Height (mm): 420
Outer diameter (mm): 10
Length (m): 166
1 6.2117.020 Power adapter EU 230 V / 9 V DC
With EU mains plug. Input: 220...240 V AC. For 622, 649, 722, 728
Stirrers, 727 Ti Stand or Spectrosense. Output: 9 V DC/0.2 A
Length (m): 2
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20
1 8.728.8001EN 728 Magnetic Stirrer Manual
728 Magnetic Stirrer
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7.1.6 728 Magnetic Stirrer complete for Titrino/Dosimat
2.728.0040
Qty. Order no. Description
1 1.728.0010 Magnetic Stirrer
1 6.1903.020 Stirring bar / 16 mm
Stirring Bar with magnetic core, PTFE coated, length 16 mm
Material: PTFE
Outer diameter (mm): 4
Length (mm): 16
7 Accessories
1 6.1903.030 Stirring bar / 25 mm
Stirring bar with magnetic core, PTFE covering, length 25 mm.
Material: PTFE
Outer diameter (mm): 5
Length (mm): 25
1 6.2001.010 Support stand with support rod
For Dosimats and Titrinos
Width (mm): 58
Depth (mm): 143
Outer diameter (mm): 10
Length (mm): 420
728 Magnetic Stirrer
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21
7.2 Optional accessories
Qty. Order no. Description
1 6.2013.010 Clamping ring
For support rods with a diameter of 10 mm.
Material: Metal
Width (mm): 20
Height (mm): 16
1 6.2021.020 Electrode holder
Electrode holder for 4 electrodes and 2 buret tips
Material: Plastic
1 6.2723.130 Cover for 655/665/765
Dust cover for 655, 665, 765 Dosimats
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1 8.728.8001EN 728 Magnetic Stirrer Manual
7.2 Optional accessories
728 Magnetic Stirrer
2.728.0010
Order no.
6.2138.010 Cable 692/780/781 - 665/765 - 722/727/728
Connecting 692, 780, 781 pH/Ion Meters to 622, 649, 722 Stirrers or 727 Ti
Stand and 665, 765 Dosimats
Description
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22
728 Magnetic Stirrer
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Order no. Description
6.2138.020 Cable 692 - 765 - 776 - 722/727/728
Connecting 692 pH/Ion Meter to 622, 649, 722 Stirrers or 727 Ti Stand and
665, 765 Dosimats and 725, 776 Dosimats (for auxiliary solutions)
Length (m): 1.0
8.000.6077EN Determining the water content in biodiesel by Karl
Fischer titration as per EN ISO 12937 (english)
This poster describes the water determination in different biodiesel samples via
direct coulometric titration, the Karl Fischer oven method and an automated KF
pipetting system.
8.000.6078EN Water determination in pharmaceuticals using an
automated Karl Fischer Oven Technique (english)
The poster describes the water determination in pharmaceuticals using the Karl
Fischer oven technique.
7 Accessories
8.728.3003 Declaration of conformity for 728 Magnetic Stirrer
(English)
TP-kf-biod Determining the water content in biodiesel by Karl
Fischer titration as per EN ISO 12937
This poster describes the water determination in different biodiesel samples via
direct coulometric titration, the Karl Fischer oven method and an automated KF
pipetting system.
TP-kf-ot-pha Water determination in pharmaceuticals using an
automated Karl Fischer Oven Technique
The poster describes the water determination in pharmaceuticals using the Karl
Fischer oven technique.
728 Magnetic Stirrer
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23
Index
Index
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C
Connect
Magnetic stirrer .................... 8
D
Dimensions .............................. 13
E
Electrostatic charge .................... 4
G
GLP .......................................... 10
Guarantee ................................ 14
I
Instrument description ................ 1
M
Magnetic stirrer
Direction of rotation ........... 11
Rotational speed ................. 11
Mains voltage ............................. 3
Maintenance Agreement .......... 10
Material .................................... 13
Model versions ........................... 1
O
Optional accessories ................. 22
P
Power supply
Power consumption ........... 11
Supply voltage .................... 11
Q
Quality Management ................ 10
S
Safety instructions ...................... 3
Scope of delivery ...................... 16
Service ....................................... 3
Standards ........................... 11, 12
V
Validation ................................. 10
W
Warranty .................................. 14
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24
728 Magnetic Stirrer
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