6 Stirring operation
Thermo Scientific
18
50108226_02.2007
6 Stirring operation
CAUTION
Do not place hot stirring vessels on top of the magnetic stirrer (2).
Maximum temperature: +56°C (except MICRO: max. +100°C).
For MINI and MICRO, please observe the correct orientation of the stirring drive (2) (Figure 9)
Bottom: Flat-strip cable
or M4 thread
Figure 9: Correct orientation of the stirring drives MINI (left) and MICRO (right)
6.1 Recommended rotation speed ranges
We recommend the following rotation speed ranges for various applications:
Application
Rotation speed range
Microbiological and biotechnical applications:
(rpm)
Aeration of bacteria cultures
Growth of bacteria cultures
Dissolving nutrient media
200-350
300-450
350-500
Routine laboratory work:
Prevent aeration of suspended matter
Titration
Dissolving solids
150-250
250-400
350-700
Table 5: Recommended rotation speed ranges
CAUTION
TELEMODUL 20 C / 40 C:
If you selected the shake mode (vertical mixing):
Select the minimum speed setting and then increase it slowly.
Depending on the magnetic stirring bar used, you may be able to
perform vertical stirring only at lower speeds.
6.2 Stirring using the TELEMODUL control unit
Fill stirring vessels no more than half full (upper rotation speed range) or three-
quarters full (lower rotation speed range).
Place a magnetic stirring bar into every stirring vessel.
Turn the rotation speed control button (6) to position OFF
(see also Figure 2).
Center the stirring vessel onto the marked stirring point (1).
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