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If the ultrasound signal is poor or erratic then the thickness value
may remain hollow – thus indicating the measurement may not be
reliable.
Stable is defined as; the thickness measurement changing no
more than + or - the Resolution setting.
Example.
The Resolution is set to 0.05mm, therefor the thickness
measurement must not change by more than +0.05mm or
-0.05mm for 2 seconds or more to be “stable”.
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.