Mahr MarSurf RD 18 User Manual

Mahr GmbH, MarSurf M 300 and RD 18
22
37
36
35
Fig. 7
Intersection lines for peak count
35 Upper intersection line C1
36 Diagram mean line
37 Lower intersection line C2
Setting the reference line and the
intersection line for the material ratio
To calculate the material ratio Rmr (tp for ASME),
an intersection line C (level p for ASME) (45) is
placed into the profile. The position of this inter-
section line is determined by its distance (in µm
or µin) to the reference line CREF (40).
The reference line is parallel to the diagram mean
line; its position is determined by a material ratio
value (e. g. "CREF 5.0 %").
40
45
46
Fig. 8
Reference line and intersection line
for material ratio
40 Reference line CREF
45 Intersection line C (p for ASME)
for material ratio
46 Additional intersection line
for material ratio list
Setting the intersection lines
for peak count
To calculate the peak count RPc, an upper in-
tersection line C1 (35) and a lower intersection
line C2 (37) are placed into the roughness profile.
Both intersection lines are parallel to the diagram
mean line (36).
The distance (in µm or µin) from the intersec-
tion lines to the diagram mean line can be set to
symmetrical or asymmetrical values.
16
To set a symmetrical distance from the intersec-
tion lines C1 and C2 to the diagram mean line:
1. Set the upper intersection line C1.
The value for the lower intersection line C2
is automatically set to -C1.
To set an asymmetrical distance from intersec-
tion lines C1 and C2 to the diagram mean line:
1. First set the value for C1. The value for the
lower intersection line C2 is automatically
set to -C1.
2. Then select the "C2" button by pressing the
key and set the desired distance C2 for the
lower intersection line.
If the value is negative, the intersection line
lies below the diagram mean line.
Each time the value for C1 is changed,
C2 is reset to -C1. If C2 ≠ -C1 is required,
C2 must then be reset.
16 The values for C1 and C2 should be entered in steps of
0.1 µm. The profile resolution of up to 7 nm means that
there is no point having smaller steps.
i

Mahr MarSurf RD 18 Specifications

General

Brand	Mahr
Model	MarSurf RD 18
Category	Measuring Instruments
Language	English