Section 6: Selected Applications & Techniques

Coupling Technique: The combination of transducer duty cycle
requirements and the tendency of couplants to solidify or boil off at the upper
end of their usable thickness range requires quick work on the part of the
operator. Many users have found the best technique to be to apply a drop of
couplant to the face of the transducer and then press the transducer firmly to
the test surface, without twisting or grinding it (which can cause transducer
wear). Any dried couplant residue should be removed from the transducer tip
between measurements.