Mahr MarSurf M 300, Operating Instructions Manual, Page: 25 / 72

Mahr GmbH, MarSurf M 300 and RD 18 21
In special cases, the next shortest cutoff may
be used instead of the standard one required
by ISO 4288. The "Lc short" setting can also be
implemented after the meas urement.
14
After the setting is made, the cutoff value is dis­
played in the top status bar
(5) (see Fig. 2)
.
When the short cutoff is switched on, the symbol
appears in the top status bar.
If a standard traversing length is selected
by pressing
Lt/Lc
, the short cutoff is de­
activated again.
Periodic
profiles Aperiodic profiles Cutoff Sampling length
Evaluation length
RSm in mm Rz in µm Ra in µm Lc in mm lr in mm
lm in mm
(with n = 5)
RSm
≤
0.13 Rz
≤
0.5 Ra
≤
0.1 0.25 0.25
1.25
0.13 < RSm
≤
0.4 0.5 < Rz
≤
10 0.1 < Ra
≤
2 0.8 0.8
4
0.4 < RSm 10 < Rz 2 < Ra 2.5 2.5
12.5
Tab. 2
Determining the cutoff
in accordance with DIN EN ISO 4288
14 If the automatic setting A of cutoff and traversing length
is set, the cutoff cannot be modified.
i
Selecting the length of the pre- and post-
travel
If standard traverse lengths cannot be used
with the testpiece, the pre­travel
Lv and post­
travel Ln can be shortened
15
. In the setting
"Lv short" Lv and Ln are half as long as the stan­
dard cutoff.
When the short pre­ and post­travel are switched
on, the symbol
appears in the top status
bar.
By selecting a standard traversing length
with
Lt/Lc
the short pre­ and post­travel
are switched off again.
15 If the automatic setting A of cutoff and traversing length
is set, the length of the pre­ and post­travel cannot be
modified.
i