8
A1207 PenGauge
© 2022 Acoustic Control Systems – ACS Group
Operation manual
Operation manual
Lab
le
Description
u
Thickness measurement result
v
Accumulator charge level
w
Measurements units
1.2.3.2
Operation principle
The instrument measures the time of the double movement of ultrasonic pulses through
the inspected object from one surface to another. This time is converted to the thickness
value using a known velocity value.
The piezoelectric transducer integrated into the instrument’s case sends ultrasonic
pulses into the inspected object and receives their reflections. The transducer is put on
the surface of the tested object in the point where the thickness should be measured.
1.3
Intended use
1.3.1
Operating restrictions
The instrument is designed to be operated under conditions listed in the section
.
1.3.2
Factors influencing the operation of the instrument and accuracy of the
readings
1.3.2.1
State of the surface
Loose or exfoliating rust, corrosion, or dirt on the surface of the object to be tested can
influence the transmission of the ultrasonic sound in the material. Hence such surface
should be cleaned of the rust and scale followed by applying more contact fluid as
compared to the fluid amount required for the smooth surface.
Thorough cleaning of the rough corroded surfaces will increase the accuracy of the
measurements and prolong the transducer's lifetime.
If there is a thick layer of paint on the surface or the paint starts to pill off, then remove it
since the thick paint layer reduces the signal and can produce a false echo, thus resulting
in false measurement results. The measurements can be executed through the thin paint
6
