Tritex Multigauge 5700 Datalogger Ultrasonic Thickness Gauge www.tritexndt.com
Page 51
9.2.
Echo Strength Indicator
The gauge will show an increasing number of bars on the right hand side of
the display to indicate the strength of the returning echoes. The stronger the
returning echoes are, the more bars will be displayed.
9.3.
Precautions When Measuring
q
Check that the material has parallel front and back walls.
If the front and back walls are not parallel, the ultrasound hitting the
back wall will be deflected away from the face of the probe. The probe
will therefore not receive any echoes back.
q
The surface being measured should be free from dirt or
debris.
It may be necessary to clean or brush the surface prior to
taking measurements.
q
Ensure plenty of ultrasonic gel is used between the probe
and the material to eliminate any air pockets.
Air is the enemy of
ultrasound and it is essential that couplant exists to form a path for the
ultrasonic signal.
q
A membrane should be correctly fitted to the probe.
q
Place the probe firmly on the surface being measured to make
good contact.
q
Do not remove protective coatings.
The gauge is designed to
ignore these.
q
Ensure the coating is solidly adhered to the surface.
Triple echo will ignore coatings as long as they are solidly adhered to
the surface. If the coating has become loose or delaminated then air
pockets will exist.
Echo Strength
Indicator
Measuring
mm
5915 m/s
2.25 MHz 13mm
AUTO
HOLD
15.0
