TESA TESA-Rugosurf 20, Инструкция по эксплуатации

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10
9 ROUGHNESS MEASUREMENT
For a correct way of proceeding when measur-
ing the roughness of a surface finish, the follow-
ing items must be taken into account.
1 Whenever possible, install your roughness
gauge on a rigid support, free from vibrations.
Carefully clean the surface to be measured. As
the measurement is being taken, don’t keep
the gauge in your hand, so as to prevent any
movement. If necessary, take several meas-
urements for comparison purposes. If one of
the measured values is significantly different
from all others, this means that the gauge
has been disturbed during the measurement
operation. The accessories supplied with the
gauge, i.e. the probe itself, probe cover and
raising items, make positioning easier.
2 Press the key on the left side of the
display screen to power up your roughness
gauge.
3 Select the value together with the number of
cut-offs you want to use for the measurement
(see in the table below).
4 Position the probe in a such way that its axis
lies parallel to the surface to be measured, as
far as possible. Enabling the function Posi-
tion will let you check the probe position, es-
pecially in hard-to-reach locations.
5 Press the key to start the measurement
cycle. You may also use the command avail-
able from Rugosoft (06930034). The drive
unit moves the probe along the surface to be
measured. The graph displayed during the
measurement shows the probe advance, so
that any noticed irregularity can be checked in
the course of the probing operation. On com-
pletion of data acquisition, display shows the
measured value for each parameter and the
drive unit moves the probe back to its start
position.
Pressing the key allows you to discon-
tinue the measurement at once.
Note
The ambient temperature, but also that of the
roughness gauge and the part to be measured
should be as identical as possible and within
the given operating temperature limit. The best
from your gauge is obtained at 20°C.
Possible settings for roughness measurement according to ISO 3274 on non-periodic surfaces
Ra (µm)
from up to and including Cut-off (mm) L
t
(mm)
0,02 0,1 0,25 0,75 to 1,75
0,1 2 0,8 1,30 to 4,50
2 10 2,5 3,00 to 13,0
Ra (µin)
from up to and including Cut-off (in) L
t
(in)
0.5 2.5 0.01 0.03 to 0.07
2.5 50 0.03 0.05 to 0.18
50 250 0.10 0.12 to 0.51
Relationship between the roughness and cut-off, in millimetre
Relationship between the roughness and cut-off, in inches