Elwe Didactic GmbH
▪
Steinfelsstr. 5
▪
08248 Klingenthal
▪
Germany
▪
www.elwedidactic.com
3B Scientific GmbH
▪
Rudorffweg 8
▪
21031 Hamburg
▪
Germany
▪
www.3bscientific.com
Subject to technical amendments
© Copyright 2012 3B Scientific GmbH
7.1.3 Hall voltage as a function of temperature
T
•
Select magnetic flux density
B
or coil current.
•
Switch on the heating controller and record the
Hall voltage
U
H
as a function of temperature.
•
It is recommended that the sample be heated to
170°C and to write down the Hall voltage as it
cools down.
•
Turn on the heating controller and record the
Hall voltage
U
H
as a function of temperature.
•
For your measurement plots, see the manual for
the relevant circuit boards.
7.2 Measurement of conductivity as a function of
temperature
T
The following equipment is needed for the experi-
ments:
1 Transformer with rectifier, 3 A (230 V, 50/60 Hz)
1003316
or
1 Transformer with rectifier, 3 A (115 V, 50/60 Hz)
1003315
•
Select a small sample current
I
P
.
Since the cur-
rent will cause the sample to heat up, you
should
not
exceed a current of
5mA
.
•
Switch the display to sample voltage.
•
Turn on the heating controller and record the
sample voltage
U
P
as a function of temperature.
•
For your measurement plots, see the manual for
the relevant circuit boards.
8. Care and maintenance
•
Before cleaning the equipment, disconnect it
from its power supply and remove the circuit
board.
•
Use a soft, damp cloth to clean it.
•
Keep the circuit board in the original box after it
has been used and has cooled down.
9. Disposal
•
The packaging should be disposed of at local
recycling points.
•
Should you need to dispose of the equipment
itself, never throw it away in normal domestic
waste. Local regulations for the disposal of elec-
trical equipment will apply.
Fig. 9 Experiment set-up for investigating the Hall effect with a uniform magnetic field
