Mitutoyo SURFTEST SJ-410 - Mr2 (JIS2001, ISO1997, VDA, Free): Material-Ratio Length Rate 2 (Lower Relative-Material-Ratio Length); A1 (JIS2001, ISO1997, VDA, Free): Peak Area

No. 99MBB765A
23-34
23.5.33 Mr2 (JIS2001, ISO1997, VDA, Free): Material-ratio length rate 2 (Lower
relative-material-ratio length)
From the lines that are obtained by selecting 2 points (point A and point B) on the BAC
(material-ratio profile) that differ in mr value by 40%, obtain the line with the smallest
inclination. Set point C and point D to be the points where the obtained line intersects the
lines at mr = 0 and mr = 100. Set point E to the point on the BAC with the same slice level
as point D. Mr2 is the mr value at point E. (Material-ratio length rate 2)
Mr2
23.5.34 A1 (JIS2001, ISO1997, VDA, Free): Peak area
From the lines that are obtained by selecting 2 points (point A and point B) on the BAC
(material-ratio profile) that differ in mr value by 40%, obtain the line with the smallest
inclination. Set point C and point D to be the points where the obtained line intersects the
lines at mr = 0 and mr = 100. Set point H to the point on the BAC with the same slice level
as point C, and then set point I to the point were the BAC profile and the slice level at mr =
0 intersect. Next, set point J along mr = 0, so that the area enclosed by line segment CH,
line segment CI, and curve HI and the area of triangle CHJ are the same. A1 is the area of
triangle CHJ. (Peak area)
Peak area A1
D
G
H
C
A
B
E
A2
A1
Rk
Rvk
Mr1
Mr2
40%
J
F
Rpk
I
Rvk
DEPTH (µm)
mr[c] (%)
D
G
H
C
A
B
E
A2
A1
Rk
Rvk
Mr1
Mr2
40%
J
F
Rpk
I
Rvk
DEPTH (µm)
mr[c] (%)