5 Stirring operation
Thermo Scientific
16
50108213_02.2007
End stirring operation:
Press the START/STOP key
(1).
The magnetic stirrer switches to standby. The digital display (7) goes out and the
magnetic stirring bars are stopped. However, the device is still live.
INFORMATION
If you are not using the magnetic stirrer (5) for a longer period of time,
disconnect it from mains supply. Only then the stirrer is completely
turned off.
5.4.1 Tips on stirring
If rotation of the magnetic stirring bar is uneven or jerky:
Reaction between the alternating magnetic field and the magnetic stirring bar is
too strong.
Increase the rotation speed, or
Reduce power, or
Use a smaller magnetic stirring bar.
If the magnetic stirring bar cannot be centred, or constantly wanders off
centre:
Reaction between the alternating magnetic field and the magnetic stirring bar
too weak, or the base of the stirring vessel is concave or too thick.
Move the stirring vessel a little back and forth and recentre it on the stirring
point (6).
Reduce the rotation speed, or
Increase power, or
Use a longer magnetic stirring bar or one with a larger diameter (e.g. the
elliptical or KOMET magnetic stirring bar), or
Use a smaller stirring vessel with a thin-walled, flat base, or
Reduce the filling level in the stirring vessel.
If the stirring action is too weak:
Increase power, or
Use a magnetic stirring bar of the KOMET series, or
Use a longer magnetic stirring bar, or a stirring vessel of smaller diameter.
