3B Scientific Foucault Pendulum (230 V, 50__60 Hz) - Manual (Page 6)

6
Operating instructions
4/05 ELWE/ALF
Foucault's pendulum is used for the quantitative meas-
urement and qualitative demonstration of the earth's
rotation.
1. Safety instructions
∑ The glass housing should not be subjected to any
mechanical load or stress. Caution: Danger of break-
age and injury!
∑ Follow the instructions for positioning (3.1 Setup).
∑ When configuring the electrical excitation, do not turn
up the electricity so high that the bob hits the glass
wall.
2. General description, technical data
In 1850, Frenchman Jean Bernard Leon Foucault demon-
strated the rotation of the earth for the first time with the
help of a pendulum. To do so, he used a pendulum with
a weight of 28 kg and a length of 67 m. The ELWE Foucault
pendulum is a compact apparatus which maintains the
amplitude of the pendulum by constant excitation. A
Charron ring (see Fig. 2) prevents any elliptical motion. By
virtue of this, long-term measurements are possible. A
measuring device consisting of an angle scale divided
into minutes (Fig. 1) enables quick and precise measure-
ments. The housing permits clear visibility from all sides
and allows several observers to simultaneously observe
the change in the direction of oscillation. The apparatus
8403000 Foucault’s pendulum
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