Hitachi TM3030 Plus - Appendix; APPENDIX 1 Roughness Parameters

Appendix - 1
APPENDIX
APPENDIX 1 Roughness Parameters
1. RSm (Mean Spacing of Profile Irregularities)
Average interval measured in average line direction between local peaks or valleys
Sm1 Sm2 Sm3


l
SmiSm
n
1
2. Rlr (Profile Length Ratio)
Total length of a cross-sectional curve divided by the length of a segment (in percent)
b
Length=a
Rlr
a
b
100
(%)
3. Rpm (Average Maximum Profile Peak Height)
The reference length is divided into 5 equal parts, for each segment the height of the
center line peak is calculated, and Rpm refers to the arithmetic mean of the center line
peaks.