HOMMELWERKE T500 Manual De Instrucciones página 75

R z ISO Ten point height
ISO/DIN 4287/1

5
1
∑

= × +
Ypi

z ISO

5
=
i 1
R z JIS Ten point height
JIS B 601
L t

5
1
∑

= × +
Ypi

z JIS

5
=
i 1
R max JIS Maximum peak to valley height
JIS B 601
L t
T500
3 Surface roughness parameters
The main value of the absolute values of the
5 highest peaks and the 5 lowest valleys
within the reference length lm (determined
from the filtered roughness profile).

5
∑

Yvi


=
i 1
Mean value of the absolute values of the 5
highest peaks and 5 lowest valleys within the
reference length L t (determined from the
unfiltered, levelled profile).

5
∑

Yvi


=
i 1
Vertical distance between the highest and
lowest points of the unfiltered, levelled profile
within the reference length L t .
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