3B Scientific Hysteresis Curve User Manual

3B SCIENTIFIC® PHYSICS

Equipment set - coil for measuring hysteresis 8496112

Instruction sheet

08/06/DML

1 Base plate
2 Retainer for Hall probe
3 Coil
4 4-mm sockets

5 Iron samples

1. Safety instructions

Caution:

• To avoid damaging the coil by overheating, do
not exceed the maximum allowable current of
3 A DC.

2. Description

The for measuring hysteresis equipment set coil is
for recording hysteresis curves (magnetic flux den­sity B as a function of magnetic field strength H) for
various ferromagnetic core materials.

The cylindrical coil consists of 600 compact turns in
several layers mounted on a base plate. Three
different iron samples can be interchanged to form
the core of the coil. A retainer on the base plate
accommodates the field probe.

3. Technical data

Wire diameter: 1 mm
Number of turns: 600

Internal impedance: 1.5 Ω
Inductance without core: 3.5 mH
Dimensions: 200 x145 x 65 mm
Iron samples: 140 mm x 10 mm Ø
Material: Construction steel,

carbide metal, iron
(stainless)

Total weight: 950 g approx.

4. Operation

To record hysteresis curves, the following appara­tus is additional required:
1 AC/DC power supply 8521131
1 Teslameter 8533981
1 Axial/tangential field probe 8533997
1 Escola 10 multimeter 8531160
Experiment leads

3

1

• Connect the power supply, coil and ammeter
in series (see Fig. 1).

• Place a core inside the coil.

• Secure the field probe in its retainer so that the
tangential probe is against the coil core.

• Turn on the power supply and increase the
current to the coil until the magnetic flux den­sity B approaches saturation. Make sure the
current to the coil does not exceed its 3-amp
limit.

• Determine the magnetic field strength H from
the current to the coil I, the number of turns n,
and the length of the coil s.

InH⋅

=

s

• Read the magnetic flux density B from a
teslameter.

• Set the current back to zero, reverse the polar­ity to the coil and conduct measurements in
the negative current range.

• Plot the magnetic flux density as a function of
the magnetic field strength.

• Repeat the experiment with various iron sam­ples.

Fig.1 Obtaining a hysteresis curve

Fig. 2 Example of a hysteresis curve

max. 3 A

A

Elwe Didactic GmbH ▪ Steinfelsstr. 6 ▪ 08248 Klingenthal ▪ Germany ▪ www.elwedidactic.com

3B Scientific GmbH ▪ Rudorffweg 8 ▪ 21031 Hamburg ▪ Germany ▪ www.3bscientific.com

Subject to technical amendments