3B Scientific SW Ultrasonics Set (115 V, 50__60 Hz) - Manual

3B SCIENTIFIC® PHYSICS
1
SW Set - Ultrasonics (230 V, 50/60 Hz) 1012845
SW Set - Ultrasonics (115 V, 50/60 Hz) 1012846
Instruction manual
08/12 TL
1. Description
The SW set for ultrasonics is designed to dem-
onstrate the fundamental properties of waves in
the form of a space-saving table-top set-up,
using 40-kHz ultrasonic waves as an example.
The sound is propagated along the surface of
the table, to a good approximation. Diffraction
objects, plane and convex mirrors etc. are there-
fore designed to be set up in the plane above
the table top. This facilitates setting up easily
understood experiments using work templates
and overlays.
Suitable probes make it possible to record oscil-
lations at any point of the wave and to measure
the field of sound after reflection, wave diffrac-
tion and interference. One of these probes, the
ultrasonic pen, also features a phase indicator in
the form of an LED, the brightness of which is
reduced to a minimum when the phase differ-
ence between the point where the measurement
is being made and a selected reference point is
a multiple of 360°. The ultrasonic pen can thus
be used to record wave fronts as lines of similar
phase, for example (isophases).
For some advanced experiments it is recom-
mended that a multimeter with a suitable fre-
quency response be used to measure the ampli-
tude of ultrasonic waves. Connecting a dual-
channel oscilloscope allows the ultrasonic oscilla-
tions at the location of the probe to be displayed.
The equipment set with the order no. 1012845 is
designed for mains voltage of 230 V (±10%),
while set no. 1012846 is for 115 V (±10%).