1 Introduction Wall thickness measurement using the DMS Go+
1-18 Edition 4 (05/2014) DMS Go+
TopCOAT method
(measurement mode TOP-COAT)
The patented TopCOAT method optimizes the corro-
sion measurement through paint coatings. In this pro-
cess, the test object and paint coating are measured at
one go, and the two values are displayed on the screen.
Measurements using this method are even possible on
heavily corroded backwalls.
A special probe equipped with two pairs of transmitter/
receiver elements is used for the TopCOAT method.
The first pair of transmitter/receiver elements deter-
mines the coating thickness by means of a longitudinal
sound wave propagating beneath the surface of the test
object. At the same time, the second pair determines the
total wall thickness and reduces this value by the coat
-
ing thickness. The two values are displayed simultane-
ously on the DMS Go+ screen.
Measurements according to the TopCOAT method are
only possible using the DMS Go+ TC.
The following figure shows the operating principle of the
TopCOAT method using a special probe.
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