Measurement mode TopCOAT 7 Special functions of the DMS Go+ TC
DMS Go+ Edition 4 (05/2014) 7-11
– Apply some couplant to the reference block at the in-
strument rear and to the reference block made of
copper.
– In the function group PROBE&CAL, select the func-
tion PROBE ZERO.
– Press one of the left or right arrow keys in order to
start the zeroing. The message Put probe on zero
block - use couplant is displayed on the screen.
– Couple the probe. The calibration starts.
– Keep the probe coupled as long as the message Ac-
quiring, please stay coupled is visible on the dis-
play screen. When the message is no longer visible,
the zeroing for the TopCOAT method is finished.
The coating thickness is displayed next to the wall thick-
ness reading on the display screen.
Sound velocity in the test object.
The sound velocity in the test object must be known and
set in the instrument for TopCOAT measurements (
see
Section Setting the sound velocity, page 5-31).
You can enter the material velocity manually or deter-
mine it by means of DMS Go+.
If you carry out measurements using the
measurement mode AUTO-V on a non-coat
-
ed area of the same test object, the current
material velocity is known and set in the in
-
strument. You can switch to the measure-
ment mode TOP-COAT immediately. The
sound velocity that was determined last is
maintained.
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