Metrohm 728 User manual
728 Magnetic Stirrer
Manual
8.728.8001EN / 2019-11-29
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
www.metrohm.com
728 Magnetic Stirrer
Manual
8.728.8001EN / 2019-11-29
Technical Communication
Metrohm AG
CH-9100 Herisau
This documentation is protected by copyright. All rights reserved.
This documentation has been prepared with great care. However, errors
can never be entirely ruled out. Please send comments regarding possible
errors to the address above.
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 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
5 Technical specifications 10
5.1 Magnetic stirrer .................................................................. 10
5.2 Power supply ...................................................................... 10
5.3 Interfaces and connectors ................................................. 10
5.4 Ambient temperature ......................................................... 10
5.5 Reference conditions .......................................................... 10
5.6 Dimensions/material ........................................................... 11
6 Accessories 12
Index 13
Table of figures ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 728 Magnetic Stirrer
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/
Dosino
Each version includes different accessories according to its use (see chap-
ter 6, page 12).
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-threat-
ening 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 possible damage to
instruments or instrument parts.
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
728 Magnetic Stirrer ￭￭￭￭￭￭￭￭ 3
NOTE
This symbol highlights additional information and
tips.
1.3 Safety instructions
1.3.1 General notes on safety
WARNING
Operate this instrument only according to the information contained in
this documentation.
This instrument 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.
Supply voltage
WARNING
An incorrect supply voltage can damage the instrument.
Only operate this instrument with a supply 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 power cord out of the power 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 con-
nections. 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 2012/19/EU, WEEE – Waste
Electrical and Electronic Equipment.
The correct disposal of your old instrument will help to prevent negative
effects on the environment and public health.
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