3B SCIENTIFIC Hall Effect Basic Apparatus, Инструкция по эксплуатации, Страница: 5 / 6

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7.1.3 Hall voltage as a function of temperature T

Select magnetic flux density B or coil cur-
rent.

Switch on the heating controller and record
the Hall voltage
U
H
as a function of tempera-
ture.

It is recommended that the sample be heat-
ed to 170°C and to write down the Hall volt-
age 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 manu-
al for the relevant circuit boards.
7.2 Measurement of conductivity as a func-
tion of temperature T
The following equipment is needed for the ex-
periments:
1 Transformer with rectifier, 3 A @230 1003316
or
1 Transformer with rectifier, 3 A @115 V 1003315

Select a small sample current I
P
. Since the
current 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 tempera-
ture.

For your measurement plots, see the manu-
al 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 equip-
ment itself, never throw it away in normal
domestic waste. Local regulations for the
disposal of electrical equipment will apply.
Fig. 9 Experiment set-up for investigating the Hall effect with a uniform magnetic field