To help obtain a multiple echo reading the operator should
continue to move the probe around to locate a suitable reflector,
using a slight rocking motion.
Coupling Strength Indicator
When the Gauge displays a valid thickness measurement there is a
vertical coupling strength indicator displayed on the left side of the
screen. This shows the strength of the return echo signal giving
the user an idea of
a) How well the probe is coupled to the test material.
b) How attenuative the material and coating is.
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