3B SCIENTIFIC PHYSICS 1009934 Instrucciones De Uso página 11

7.1.3 Hall voltage as a function of temperature T
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Select magnetic flux density B or coil current.
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Switch on the heating controller and record the
Hall voltage U as a function of temperature.
H
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It is recommended that the sample be heated to
170°C and to write down the Hall voltage as it
cools down.
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Turn on the heating controller and record the
Hall voltage U as a function of temperature.
H
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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)
or
1 Transformer with rectifier, 3 A (115 V, 50/60 Hz)
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Select a small sample current I
rent will cause the sample to heat up, you
should not exceed a current of 5mA.
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Switch the display to sample voltage.
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Turn on the heating controller and record the
sample voltage U as a function of temperature.
P
•
For your measurement plots, see the manual for
the relevant circuit boards.
Fig. 9 Experiment set-up for investigating the Hall effect with a uniform magnetic field
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1003316
1003315
. Since the cur-
P
Subject to technical amendments
© Copyright 2012 3B Scientific GmbH
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.