Thermo Scientific VARIOMAG MINI 07 User manual

Magnetic Stirrer
Operating Manual
50108226 Issue 02. 2007
TM
MINI 07 MINI 20
MICRO 07 MICRO 20
COMPACT 07 COMPACT 20
MAXI 07 MAXI 20 MAXI 40

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Contents
50108226 _02. 2007 3 Thermo Scientific
Page
Assembly drawings 4
User considerations 6
Correct use 6
Incorrect use
6
Pictographs 6
1 Safety considerations 7
2 Equipment description 9
3 Function
10
4 Startup procedure
11
4.1 Connecting the device
11
4.2 Stirring vessels
14
4.3 Magnetic stirring bars
14
5 Short operating manual for
TELEMODUL 20 C / 40 C
16
6 Stirring operation
18
6.1 Recommended rotation speed
ranges
18
6.2 Stirring using the TELEMODUL
control unit
18
6.3 Stirring using the TELEMODUL 20 C /
40 C
19
6.3.1 Selecting the language
19
6.3.2 Selecting a program
19
6.3.3 Stirring
20
6.3.4 Power adaptation
21
6.3.5 Mixing vertically (Shake)
21
6.3.6 Interval operation
21
6.3.7 Selecting the startup time
22
6.3.8 Terminating the stirring process
22
6.4 Tips on stirring
22
7 Remote operation
23
8 Maintenance and cleaning
25
9 Troubleshooting
26
10 Technical specifications
27
11 Warranty
31

Assembly drawings
Thermo Scientific 4 50108226 _02. 2007
Ass embly drawings
Figure 1: MINI, MICRO, COMPACT and MAXI stirring systems with TELEMODUL
and TELEMODUL 20 C / 40 C control units
Figure 2: TELEMODUL control unit as plug - in control unit (left) or with mains cable
(right)
1
2
4
1 Stirring point
2 Stirring drive
a) COMPACT
b) MICRO
c) MINI
d) MAXI
3 TELEMODUL control unit
4 Control cable
5
TELEMODUL 20 C / 40 C
control unit
(c)
(d)
(b) (a)
2 Stirring drive
3 TELEMODUL control unit
4 Control cable
6 Rotation speed control
button
7 Magnetic stirrer outlet
6
3
7
3
5
2
4

Assembly drawings
50108226 _02. 2007 5 Thermo Scientific
Figure 3: Control unit TELEMODUL 20 C / 40 C with power supply unit
TELEMODUL 20 C TELEMODUL 40 C
15 Power supply unit intake
16 Magnetic stirrer outlet
17 RS 232C port
Figure 4: Control unit TELEMODUL 20 C (left) and TE LEMODUL 40 C (right),
back view
9
10
11
8
12
13
14
5 TELEMODUL 20 C / 40
C control unit
8 Adjusting wheel
9 Program keys
10 Display
11 START/STOP key
12 Power supply unit
connecting cable
13 Power supply unit
14 Mains cable
15
16
15
17
16
without
function
5

User considerations
Thermo Scientific 6 50108226 _02. 2007
User considerations
Correct use
The remote - controlled single magnetic stirring systems MINI, MICRO, COMPACT and
MAXI are designed for stirring or vertical mixing of liquids. The MICRO, COMPACT and
MAXI stirring drives ar e ideally suited for submerged operation. The single magnetic
stirring systems can be employed for chemical, microbiological, pharmaceutical or
medical purposes.
The stirrers are suited to operation in the following areas:
On the laboratory bench
In incuba tors and gas incubators wit h or without air humidification
In cold chambers
MICRO, COMPACT and MAXI: In water bath
In laminar flow equi pment
In safety laboratories and sterile rooms
In measuring equipment (e. g. photospectromet ers)
Incorrect use
The magnet ic stirring systems MINI, MICRO, COMPACT and MAXI must not be
operated in hazardous locations.
Do not stir or shake flammable liquids with a low boiling point.
The magnetic stirring system MINI must not be operated in a water bath.
Do not heat liquids in p ressure sealed vessels (e.g. storage flasks, Erlenmeyer flasks).
Pictographs
You will find the following pictographs in this operating manual:
DANGER
This sign refers to dangerous voltages.
DANGER
This sign refers to hazardous situations.
Hazards to h uman life are indicated by "LIFE HAZARD".
CAUTION
This sign indicates danger to equipment and machinery.
INFORMATION
This sign indicates easier working practices.
Indicates an operating step.
Indicates alternatives.

1 Safety considerations
50108226 _02. 2007 7 Thermo Sc ientific
1 Safety considerations
For your own safety, you should observe the following safety warning signs.
The warning signs indicate potential sources of danger.
They also inform on how correct action can avert danger. You will find these warning
signs wherever there is a risk of dangerous situations.
DANGER
Supply voltage and supply frequency must be within the range
specified for the control unit (3, 5).
The control unit (3, 5) must only be connected to a grounded socket.
DANGER
Magnetism.
Magnetic or metallic parts (e.g. data carriers, pacemaker s, watches)
can be affected by magnetic fields.
Keep such parts away from the stirring drive (2) and the magnetic
stirring bars.
CAUTION
The equipment must not be operated in hazardous locations.
CAUTION
Permissible ambient conditions:
Cf. Technical specifications.
Avoid extreme temperature changes.
The control unit (3, 5) must not be run in humid rooms, or set up in
water splash zones!
CAUTION
Connect only the appro priate power supply unit to the
TELEMODUL 20 C (cf. Technical specifications, contr ol units).
Connect only the appropriate power supply unit to the
TELEMODUL 40 C (cf. Technical specifications, control units).
Connection to another power supply unit may cause damage to the
control unit.
CAUTION
Before connecting the stirring drives ( 2) to the TELEMODUL 20 C / 40 C
control unit (5), please note the connection options as listed in Table 1.
Do not connect a single MINI, MICRO or COMPACT stirring drive to the
TELEMODUL 40 C control unit. This may result in overload and damage
the stirring drives.
You may connect only stirring drives of the same type to the benchtop
distributors, and you may only connect them in pairs.

1 Safety considerations
Thermo Scientific 8 50108226 _02. 2007
CAUTION
Do not place hot stirring vessels on top of the magnetic stirrer (2).
Maximum temperature: +56°C (except MICRO: max. +100°C).
CAUTION
TELEMODUL 20 C / 40 C:
If you selected the shake mode (vertical mixing):
Select the minimum speed setting a nd then increase it slowly.
Depending on the magnetic stirring bar used, you may be able to
perform vertical stirring only at lower speeds.
CAUTION
In case of repair, the equipment must only be opened by an authorized
service agent.
CAUTION
Do not a llow AlNiCo5 type magnetic stirring bars to remain in an
alternating magnetic field if they cannot rotate freely. Do not subject
the magnetic stirring bar to a strong inverse magnetic field. This may
result in destruction of the magnetic stirring bar.
INFORMATION
In the case of circular and triangular magnetic stirring bars, the length
must not exceed 50 mm. The leng th of the magnetic stirring bars
should not exceed 80 % of the vessel diameter.
Do not use cylindrical stirring bars with a center ring, o r elliptical
stirring bars with a round cross - section.
INFORMATION
Some magnetic stirring bars (especially triangular bars) may have a
critical resonance frequency at lower rotation speeds. This may cause
the magnetic stirring bar to wander away from the turning center and
carry out periodic oscillations. Av oid this rotation speed setting when
the problem occurs. Quickly travel through this problem range when
adjusting the rotation speed.

2 Equipment description
50108226 _02. 2007 9 Thermo Sc ientific
2 Equipment description
Figures 1 to 4 show the components together with their position numbers.
Every magnetic stirring s ystem MINI, MICRO, COMPACT and MAXI is equipped with
one stirring point (1). The drive is inside the housing of the stirring drive (2), which is
completely watertight. This prevents germs from penetrating into the inside of the
stirring drive (2). The stirring drive (2) is cleared for use in safety laboratories and sterile
rooms. The drive is constructed without the use of moving parts and therefore totally
wear - free.
The stirring drive (2) gets its power either from the TELEMODUL control unit
(3; Figure 2 ) or the TELEMODUL 20 C / 40 C control unit (5; Figure 3).
On the budget -priced equipment incorporating the TELEMODUL control unit (3), the
rotation speed can be preselected continuously. This is done using the rotation speed
control button (6). The TELEMO DUL control unit (3) can be of the plug - in type, or be
fitted with a mains cable.
The TELEMODUL 20 C / 40 C (5) is available in two models, 20 C and 40 C. These two
models differ with regard to maximum speed and to stirring power (for details see the
tech nical specifications). The TELEMODUL 40 C control unit is additionally equipped
with a RS 232C port. The RS 232C interface can be used to remote- control the control
unit from a PC.
The TELEMODUL 20 C / 40 C (5) interface is menu - driven. The display (10) sh ows the
selected speed (rpm) and gives an overview over the functions selected.
You may preset speed and stirring power as well as change the stirring mode. The
adjusting wheel (8) is used for selecting the appropriate menu and for adjusting the
desired v alue. The three program keys (9) can be individually defined.
After the startup time (soft start) the stirring bar turns or mixes at the selected speed.
The TELEMODUL 20 C / 40 C (5) can be equipped with a four - way or eight - way
benchtop distributor (access ory), allowing you to control 2, 4, 6 or 8 stirring drives
simultaneously.
Stirring vessels and magnetic stirring bars do not fall within the scope of delivery.

3 Function
Thermo Scientific 10 50108226 _02. 2007
3 Function
The magnetic stirring systems MINI, MICRO, COMPACT and MAXI are used for
chemical, mic robiological, biotechnical or medical purposes, e.g.:
Growing microorganisms (e.g. aerating and growing bacteria cultures),
Dissolving nutrient media and solids,
To prevent the settling of suspended matter,
Titration,
Integration in measurement equipment f acilitating concurrent measurement
and stirring.
The MINI stirring system is designed for very small vessels such as cuvettes. It is
extremely small and flat, has a highly flexible flat - strip cable, and is suitable for
integration in measurement equipment.
The powerful and handy MICRO stirring system with its completely sealed stainless
steel body can be used for extended temperature ranges. This stirring system can be
attached to analyzers, experimental set - ups, or stands. For this purpose it is fitted wit h
an M4 thread at the bottom of the device.
The COMPACT and MAXI stirring systems are particularly suited for routine laboratory
tasks and larger stirring quantities. Thanks to their robust stainless steel bodies they
can also be used in water baths.
Liqui ds may be stirred in vessels of various shapes (e.g. cuvettes, conical (Erlenmeyer)
flasks, beakers and test tubes). As the rotation speed can be variably adjusted, liquids
can be both moved gently as well as vigorously mixed.
When the stirring vessel is p laced on the stirring point (1), an electromagnetic field will
move the magnetic stirring bar.
When using the TELEMODUL 20 C / 40 C ( 5 ), you have a choice of stirring or vertically
mixing the liquid. During stirring operation, the liquid will rotate in the vessel. During
vertical mixing (shake mode), the current inside the vessel will be directed upwards and
downwards. The liquid will not rotate. The rotation or shaking frequency can be adjusted
continuously. The speed display shows the current rotating or oscillating speed of the
magnetic stirring bars. All magnetic stirring bars will be moving at the same frequency.