DeFelsko PosiTector RTR H Gebrauchsanweisung Seite 9

2. Firmly press both probe buttons simultaneously and hold
until the Gage beeps and the surface profile height (H
measurement is displayed. The tape can now be safely
removed.
Number of Readings
At least two measurements should be taken at each location. If
the two replicas differ by 5 μm (0.2 mils) or less, their average
should be recorded as the profile.
If the two initial replicas differ by more than 5 μm (0.2 mils), a third
replica is recommended. The average of the two closest replicas
should be recorded.
Accuracy
In 2024, a comprehensive study 1 was performed to determine an
accuracy statement for replica tape. That study determined the
following accuracy and precision statements:
Tape Grade
Coarse
X-Coarse
X-Coarse Plus
The above accuracy statement is applicable under the following
conditions:
The procedure detailed in these instructions is followed
The High Accuracy Burnishing Tool is used
At least two readings are taken per measurement, in
accordance with the procedure in Number of Readings (above)
All readings are converted, using a PosiTector
Conversion mode (pg. 9) or the conversion table.
NOTE:
The Classic Burnishing Tool remains a valid
measurement practice and is recognized by standards, but does
not have an associated accuracy statement.
1 Beamish, M. (2024, March 3-7). Improvements to the Replica
Tape Test Method. AMPP 2024, New Orleans, LA, United States.
Precision
± 2 μm (0.1 mils)
± 6 μm (0.2 mils)
± 8 μm (0.3 mils)
7
Accuracy
± 8 μm (0.3 mils)
± 8 μm (0.3 mils)
± 10 μm (0.4 mils)
in
)
L