3B Scientific High Current Sensor User Manual
3B SCIENTIFIC® PHYSICS
High-Current Sensor U11315
Instruction Sheet
09/09 Hh
1. Safety instructions
• In order to avoid damage to the sensor resistor,
adhere strictly to the current and power limits
mentioned below.
• Do not exceed a maximum duration of 15 s for
a maximum current of 20 A, while taking readings. Allow the sensor to cool for 10 mins.
• Use safety connection leads.
2. Description
Sensor box for measuring electric current in AC and
DC circuits.
Shunt resistance measurement method.
For connecting inputs and outputs, use experiment
leads with 4-mm banana plugs.
CAUTION: This sensor box is not automatically
recognised by the interface.
2.1 Contents
1 Sensor box
3. Technical data
Measurement range: 0 to ±10 A
Max. current: ±20 A for 15 s
Sensor type: Shunt resistance
5 mΩ / 2 W
Accuracy: <1 %
4. Operation
• Insert into the current path via the sockets I+
and I-, maintaining the proper polarity for DC.
When measuring AC, the polarity is not significant.
• Set up a connection from the sockets U+ and
U- to the sockets U
in
A
in
or U
of the 3B NETlogTM
B
interface, maintaining the proper polarity.
1
5. Sample experiment
5.1 Measuring the magnetic field of a currentcarrying coil
Apparatus required:
1 3B NETlog
TM
interface U11300
1 High-current sensor U11315
1 Magnetic field sensor U11360
1 Field coil U12252
1 DC power supply unit 16 V/20 A U117361
5 Connection leads from U13802
• Set up the experiment according to Fig. 1
In order to build up a measurable magnetic field, a
current of up to 10 A must flow into the field coil.
At 10 A, the high-current sensor supplies a voltage
of 50 mV which is proportional to the current. The
selected measurement range is 200 mV at the employed voltage input of the interface.
• Connect the magnetic field sensor to the inter-
face.
• Increase the current in the field coil from 0 to
10 A in steps of 0.5 A and record the corresponding flux density (Fig. 2).
Fig. 1: Measuring the magnetic field of a current-carrying coil
Fig. 2: Magnetic field against current
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com
Subject to technical amendments
© Copyright 2009 3B Scientific GmbH
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