Cygnus DIVE Operating Manual
M3-DIVE-M-ENG_Iss9.docx
Page 30 of 117
the 2
nd
echo is not within the expected region for a 2
nd
echo then it
is ignored and not used to give a thickness measurement. This
check will help ensure Echo-Echo measurements are correct and
discard any impractical measurements.
Measuring Small Diameter Pipe & Tubes
When measuring small diameter pipe and tubes with a twin
element probe, 75mm (3”) or under, you must ensure the face of
the probe is correctly aligned to the curvature of the pipe
otherwise measurements may be inaccurate.
The dividing line on the face of the probe should be at
right angles to the length of the pipe.
The 2
nd
Echo must be
within this area to
provide a thickness
measurement
1
st
Echo
E1
2E1
Pipe
Probe Face
Probe Face Division is at
right angles to the pipe
