5 Stirring operation
50108213_02.2007
15
Thermo Scientific
5.3 Recommended rotation speed ranges
We recommend the following rotation speed ranges for various applications:
Application
Speed range
Microbiological and biotechnical applications:
(rpm)
Aeration of bacteria cultures
Growth of bacteria cultures
Dissolving nutrient media, intensive aeration of
bacteria cultures
200-350
300-450
350-500
Routine laboratory work:
Prevent accretion of suspended matter
Titration
Dissolving solids
150-250
250-400
350-700
5.4 Stirring
CAUTION
Do not place hot stirring vessels on top of the magnetic stirrer (5).
Maximum temperature: +56 °C.
Fill stirring vessels no more than half full (high rotation speed range), or
three-quarters full (low rotation speed range).
Place a magnetic stirring bar into every stirring vessel.
Centre the stirring vessel onto the stirring point (6).
Press the START/STOP key
(1).
The magnetic stirrer has a soft-start feature that first centres the magnetic stirring
bars within the vessels and then slowly accelerates them to the desired speed.
MAXI DIRECT and MULTIPOINT 6 / 15:
With these magnetic stirrers you have a choice of four different stirring power settings
(5/10/15/20 watts). After startup, the digital display (7) shows the Mode setting last
selected.
Press the MODE key (4).
The digital display (7) shows the set power (e.g. P 20 => 20 watt).
Set the desired power with the
key (2) and with the
key (3).
After the stirring power has been selected, the digital display (7) changes
automatically to the rotation speed selection after approximately 5 seconds.
MAXI DIRECT, POLY 15 and MULTIPOINT 6 / 15:
Set the desired rotation speed with the
key (2) and with the
key (3).
The digital display (7) shows the currently set rotation speed. You can set the speed
in increments of 10 rpm.
Selectable speed range:
MAXI DIRECT and MULTIPOINT 6 / 15:
80 to 2,000 rpm
POLY 15:
130 to 990 rpm
