Sound Velocity In The Test Object - GE DMS Go+ Operating Manual

Measurement mode TopCOAT
– 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.
DMS Go+

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+.
N o t e
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.
Edition 4 (05/2014)
7 Special functions of the DMS Go+ TC
7-11