Cygnus M2-DIVE - Taking Thickness Measurements; Step-by-Step Measurement Procedure

Cygnus DIVE Operating Manual M2-DIVE-M-ENG_Iss5.docx
Page 40 of 118
Taking a Thickness Measurement
Taking a Thickness Measurement
1
Remove any marine growth, loose
rust or loose coatings and brush the
test area clean.
2
When measuring underwater there is
no need to use a couplant - the water
itself will act as a couplant.
3
When
measuring in air apply
some
couplant gel to the test surface.
4
Place the probe
-
face on the prepared
test surface and make firm contact
applying gentle pressure.
5
The
gauge
will display a thickne
ss
measurement or an indication of Echo
Strength if no valid measurement has
been found.
Measuring Small Pipe with Twin Crystal Probes
Twin Crystal probes must be orientated correctly when
measuring pipes under 75mm (3”) diameter, see Measuring
Small Diameter Pipe & Tubes on page 31.
Signal Strength Indication
The vertical signal bars on the left side of the display show the
relative strength of the received ultrasound signal - the more bars
shown, the stronger the received signal.