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

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Subject to technical amendments
© Copyright 2012 3B Scientific GmbH
• Select the 2-T range on the magnetic field
sensor and press the Tare button.
• Insert the magnetic field sensor into the
positioning hole marked "MFS".
• Set the DC power supply to constant-
current mode, i.e. turn the current-setting
potentiometer 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
including 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 include those measurements
in your evaluation of the experiment.
Example results:
For a pole-piece separation of 8 mm and val-
ues of 10.6 V and 1.74 A the flux density will
be 300 mT.
. Care and maintenance
• Before cleaning the equipment, disconnect
it from its power supply.
• Use a soft, damp cloth to clean it.
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. 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