How To Measure - Defelsko Testex Bedienungsanleitung

Introduction
Testex Press-O-Film Replica Tape consists of a layer of
compressible foam affixed to an incompressible 50 µm (2 mils)
polyester layer. When pressed or 'burnished' against a roughened steel
surface, the foam collapses and forms an impression of the surface.
Placing the burnished Testex tape between the anvils of a micrometer
thickness gage, such as the Testex Digital Micrometer, and subtracting
the thickness of the incompressible layer gives a measure of the
surface profile height.

How to Measure

1. Locate a representative site for
measurement. Clean the surface to be
tested using a cleaning putty or other
suitable method (such as compressed
air or pressure-sensitive tape) to
remove dust, debris, or residual blast
media from the surface.
Replica Tape Grade
Coarse Minus
Coarse
X-Coarse
X-Coarse Plus
NOTE: If a measurement falls outside of the specified range for the
tape grade used, disregard the reading and re-measure the surface
with the appropriate tape grade.
2. Select the appropriate grade of replica
tape based on the expected height of
the profile being measured, using the
following chart:
Range
13 – 25 µm
20 – 50 µm
40 – 115 µm
100 – 150 µm 4.0 – 6.0 mils
1
0.5 – 1.0 mil
0.8 – 2.0 mils
1.5 – 4.5 mils
Order Code
RTCMIN
RTC
RTXC
RTXCPLUS