3B SCIENTIFIC PHYSICS U11375 Instructions D'utilisation page 4

6. Examples of use
Suitable for quasi-static measurement of voltages up
to ±8 V, for high-resistance measurement of voltages
greater than ±8 V with the aid of a resistive voltage
divider, for quasi-static measurement of voltages
greater than ±8 V with the aid of a capacitive voltage
divider, for measuring very small currents with the
aid of a high-resistance shunt and for measuring very
small charges.
7. Sample experiment
Measuring charges in electrostatics
Apparatus required:
TM
1 3B NETlog
1 Electrometer box
1 Faraday cup
1 Capacitor 1 nF, 160 V
2 Friction rods
1 Experiment lead, black, 75 cm
1 Crocodile clip 4 mm
1 Cloth for rubbing rods
Fig. 1 Experiment set-up for measuring charges in
electrostatics
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
•
Set up the experiment as shown in Fig. 1.
•
Plug the Faraday cup and the 1 nF capacitor into
the 4 mm sockets provided.
•
Plug the experiment lead into the green-and-
yellow 4 mm socket on the side of the box.
•
Attach the crocodile clip to the free end of the
experiment lead.
•
Switch on the 3B NETlog
detect the electrometer box.
•
Hold the crocodile clip in one hand and, without
releasing it, discharge the Faraday cup.
•
With the other hand lower the test object (e.g., a
friction rod that has been rubbed) into the
Faraday cup.
•
Observe the effects of the charge transfer as
U11300
shown by the changes in the voltage reading on
the 3B NETlog
U11375
U8496460
1642411
U11053
U13800
U13805
Subject to technical amendments
© Copyright 2009 3B Scientific GmbH
TM
unit and wait for it to
TM
unit.
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