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1 Introduction
Wall thickness measurement using the DMS Go+
Dual mode (measurement mode DUAL)
dual-element probe
In the dual mode, the tasks of transmitting (T) and re-
ceiving (R) are solved by two transducer elements ar-
ranged in such a way that they are mechanically sepa-
transmitter element
receiver element
rated from each other. An initial pulse is triggered on the
transmitter side and transmitted to the test object. The
transmitted pulse
reflected pulse
echoes are received on the receiver side and reconvert-
ed into (very weak) electric pulses.
test object
The DMS Go+ measures the time between transmitting
backwall
and receiving the sound pulse (time of flight). The DMS
Go+ determines the material thickness on the basis of
the measured time and the material's sound velocity.
The operating principle of a dual-element probe is
shown in the following figure.
1-16
Edition 4 (05/2014)
DMS Go+
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