replica, of the surface. It is available in
Coarse (C) and X-Coarse (XC) grades to
accommodate measurements in different
profile ranges.
Placing the compressed tape (replica) into the
PosiTector
RTR H
gives a measure of the average maximum peak-to-valley height
of the surface roughness profile. The Gage automatically subtracts
the thickness of the polyester film from all measurements.
How to Measure
Prepare the test surface
1.
Prepare the test surface
2.
Burnish the replica tape
3.
Prepare the Gage
4.
Measure
Locate a representative site for measurement. Clean
the surface to be tested. DeFelsko recommends the
use of the included putty to remove dust, debris, or
residual blast media from the surface.Firmly press the
putty onto the surface using your fingers, and remove.
Burnish the replica tape (create a replica)
Select the appropriate grade of replica
tape based on the target profile. See
tape instructions for assistance.
Pull a single adhesive-backed replica
tape free of its release paper. A “bull’s
eye” circle of paper should remain on
the release paper (it is not used for
measurement).
Apply replica tape to blasted surface. Press the adhesive-
backed ends of the tape to hold it firmly in place during the
burnishing process.
Firmly compress the foam using the rounded
end of the included stainless steel burnishing
tool. Apply sufficient pressure in a circular and
x-y rubbing motion to produce a replica with a
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