DeFelsko PosiTector 200 v.3.0 Quick Guide - Manual (Page 4)

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1. Remove the protective rubber cap from probe.
2. Power-up Gage by pressing the center navigation button.
3. Apply couplant (see pg. 2) to the surface of
the part.
4. Place the probe FLAT on the surface and
press down.
5. Lift the probe when you hear a double BEEP,
- OR - leave probe on the surface in the same location for
continuous measurements.
6. When completely finished, wipe the probe clean of couplant
then return the Gage to the protective pouch. There is no need
to disconnect the probe from the PosiTector during storage.
How to Measure How to Measure
Couplant
Probe
Coating 1
Substrate
Coating 2
The PosiTector 200
interprets the largest
“echo” within the
selected range as
the coating/coating
or coating/substrate
echo.
PosiTector 200 probes emit a high frequency sound pulse that
travels into the coating via a coupling gel and reflects from ANY
surface that is different in density. Coating thickness readings are
obtained by measuring the time taken for the ultrasonic signal to
propagate from the probe to the coating/substrate interface and
back. The travel time is divided by two and multiplied by the
velocity of sound for the coating to obtain the thickness of the
coating.
PosiTector 200 - Theory of Operation