8 Troubleshooting
Thermo Scientific
22
50134805_03.2012
8 Troubleshooting
Rotation of the stirring device (1) is uneven:
Check to see that the stirring vessel (2) is
centered
on the stirring point mark.
Check the bearing of the stirring device (1) for dirt, adhesion or wear.
Clean the bearing, or replace the stirring device (1).
Check to see that the magnet of the stirring device (1) is correctly positioned in
the rotating magnetic field (Figure 6a):
It should not sit too high (Figure 6b) , or be too long (Figure 6c).
Check to see whether the stirring device (1) comes into contact with the base of
the vessel (Figure 6d). If this is the case, raise and fix the stirring device (1) at a
higher point.
Figure 6: Positioning of stirring device.
b)
a)
d)
c)
Magnet coupling
Ø 60 mm
= Magnetic field lines
