Proceq Pundit Lab - Page 19

© 2013 by Proceq SA
18
Required steps before measurements can be
performed
1.
Put
a
small
amount
of
shear
wave
coupling
gel
on
the
transducers.
2.
Firmly pr
ess
the
transducers
on
either
side
of the
25
µs
calibration r
od
(Part
No
710
10
028). Make sure that the coupling gel is properly distributed and that no air is trapped
between the transducer and the calibration rod.
3.
Connect
the
transducers
to
Pundit
Lab.
4.
Select
the
250
kHz
transducer
from
the
list of
supported
transducers
(see
Pundit
Lab
manual chapter 3 for more details).
5.
Zero
the
instrument
as
described
in
the
Pundit
Lab
manual
chapter
2.1.
Performing measurements with the 250 kHz shear wave transducers.
Typical echo signal obtained, with an experimental setup.
The first echo arrives at approximately 25.4 µs and corresponds to the weak longitudinal
wave. After 50.6 µs the much stronger shear wave echo appears in the signal.
5.12. Transducer Holder Accessory
This accessory is particularly useful for
compound measurements. (See chapter 5)
The individual transducer holders may be
detached and used separately helping to
reduce the physical strain when carrying
out extensive measurements.