Additional Information - Elcometer Testex 122 Guia Del Usuario

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3 ADDITIONAL INFORMATION

Elcometer 122 Coarse and X-Coarse tape grades have been
redesigned to improve performance in temperatures above 60°C
(140°F).
This redesign has affected the overlap between the ranges of the two
grades, resulting in a change in the measurement procedure.
If a measurement made with either tape grade is between 38 and
64μm (1.5 and 2.5mils), a second measurement should be taken at the
same spot, with the OTHER grade.
If BOTH values are between 38 and 64μm (1.5 and 2.5mils) then the
peak-to-valley height is the average of the two values. If the second
value is outside this range, this should be used and the initial value
discarded.
The effect of these changes is to make the Coarse and X-Coarse
grade tape measurements more comparable with other means of
determining profile over testex tape's primary range of 20 to 115μm
(0.8 to 4.5mils).
mils
mils
0.8 4.5
0.5 1.5 2.5 5.0
Coarse- Coarse (Coarse + X-Coarse)/2 X-Coarse X-Coarse+
12 20 38 64 115 127
µm µm
The shaded segments mark the primary range for Coarse and X-Coarse grades.
The white segment indicates the range of X-Coarse Plus.
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