3B Scientific Tuning Fork 21 Hz with Plotter Pen - Manual (Page 3)

3B SCIENTIFIC ® PHYSICS
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
© Copyright 2008 3B Scientific GmbH
21 Hz Tuning Fork with Plotter Pen U8431030
Instruction Sheet
06/08 ALF
1 Handle
2 Prongs
3 Holder with plotter pen
4 Counterweight
1. Description
The tuning fork with plotter pen is used to
demonstrate sound vibrations and to record a curve
of the vibration on a sheet of paper.
A pen holder can be attached to one prong of the
tuning fork, while a counterweight is screwed to the
other prong.
The fork is set into vibration by pressing the prongs
together and releasing them.
2. Technical Data
Natural frequency: 21 Hz
Length: 245 mm
Total weight: 170 g approx.
3. Operation
Additional equipment needed:
1 Stand base U13270
1 Stand rod, 250 mm U15001
1 Universal clamp U13255
• Fix the holder with the plotter pen to the tuning
fork prong.
• Clamp the handle of the tuning fork firmly to the
stand.
• Adjust the height of the tuning fork so that the
plotter pen rests lightly on the paper.
• Press the prongs together and release them
abruptly.
• Pull the paper along at a steady speed under the
vibrating tuning fork.