3B Scientific Magnetic Field Sensor ±2000 mT - Manual (Page 7)

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Subject to technical amendments
© Copyright 2011 3B Scientific GmbH
2 Coils D with 600 Taps 1000988
U8497430
1 Pair of Pole Shoes 1009935
U8497205
1 Set of 15 Safety Experiment Leads 1002843
U138021
• Set up the experiment as in Fig. 1.
• Switch the transformer and rectifier to the 12-V
setting to supply the basic Hall-effect appara-
tus with 12 V AC.
• Select the 2-T range on the magnetic field
sensor and press the Tare button.
• Insert the magnetic field sensor into the posi-
tioning hole marked "MFS".
• Set the DC power supply to constant-current
mode, i.e. turn the current-setting potentiome-
ter all the way to the left (0 A) and the voltage-
setting potentiometer all the way to the right
(20 V).
• Increase the current in the series circuit includ-
ing the transformer coils from 0 A to 2 A in
steps of 0.1 A.
• You may also measure the current in the coils
using the current measurement input of the 3B
NETlog
TM unit (measuring range 2 A DC) and in-
clude those measurements in your evaluation
of the experiment.
Example results:
For a pole-piece separation of 8 mm and values of
10.6 V and 1.74 A the flux density will be 300 mT.
Fig. 1 Measurement of flux density in the air gap between pole pieces of an electro-magnet in an experiment set-up using
the basic Hall-effect apparatus