3B SCIENTIFIC Hall Effect Basic Apparatus, Instruction Manual, Page: 2 / 6

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2. Description
The Hall effect basic apparatus provides con-
tacts and power supply for the circuit boards
with a germanium crystal (1008522, 1009810
and 1009760), also holding them in place in ex-
periments measuring the Hall effect and how it
depends on temperature, magnetic field or sam-
ple current, as well as experiments on electrical
conductivity.
The apparatus contains an adjustable constant
current source for the sample current, a meas-
urement amplifier with offset compensation for
the Hall voltage and adjustable heating for sam-
ples. The heating automatically cuts out at 170°C
to protect fragile germanium crystals. Hall volt-
age, sample current, sample voltage and tem-
perature can all be read off from the display,
which can be switched between these various
modes. In addition, Hall voltage and sample volt-
age can be tapped directly via contacts on the
front, and three voltage equivalents for Hall volt-
age or sample voltage, sample current and sam-
ple temperature on the side. On the right-hand
side of the case there are three mini-DIN sockets
for computer-based measurement of the quanti-
ties mentioned above using a 3B NET
log
TM
unit.
The equipment is set up on the U-shaped core of
the multi-piece transformer kit. The magnetic field
can be measured using a magnetic field sensor
adjacent to the crystal.
3. Contents
1 Hall effect basic apparatus
1 U-shaped holder
2 Connector leads with 8-pin mini-DIN plugs
Instruction manual
4. Controls
4.1 Decoupled measurement outputs for
measuring voltage equivalents for quan-
tities
Fig.1 Measurement outputs using 4-mm sockets and
8-pin mini-DIN sockets for 3B NET
log TM
a/e Hall voltage/sample voltage*
b/f Sample current
c/g Sample temperature
d Earth socket
* only if U
P
is being displayed, otherwise it out-
puts the Hall voltage
4.2 Measurement outputs for direct meas-
urement
Fig. 2 Measurement outputs for direct measurement
h1, h2 Sample voltage
i1, i2
Hall voltage

Caution: do not any apply an external volt-
age to the measurement outputs!
4.3 Buttons for switching display and corre-
sponding LEDs
Fig. 3 Buttons for switching display
k Hall voltage or sample voltage (Hold down
for 2 s to display sample voltage)
l Sample current
m Sample temperature