GE DMS Go+ Operating Manual page 178

7 Special functions of the DMS Go+ TC
Probe
Thanks to the exact determination of the coating thick-
ness, the DMS Go+ TC can reduce the measurement
value, calculated on the basis of the sound path of the
second pair of elements, by the coating thickness and
thus display the correct wall thickness of the test object.
7-4
This method enables to always determine the wall thick-
ness on the basis of the first backwall echo. This makes
the TopCOAT method suitable e.g. for the residual wall
thickness measurement on heavily fissured backwalls
when measurements between two backwall echoes
(DUAL-MULTI) are no longer possible.
Probe
Coating
Edition 4 (05/2014)
Basics
Coating
Test object
DMS Go+