3B Scientific Tuning Fork 21 Hz with Plotter Pen User Manual

3B SCIENTIFIC® PHYSICS

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.

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.

3. Operation

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