TESA TESA-Rugosurf 20 User manual

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Instruction Manual
TESA-Rugosurf 20
Compact Surface
Roughness Gauge
English

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CONTENTS
1 Introduction 4
2 Safety precautions 4
3 General description 5
4 Elements on the top face 6
5 Elements on the rear face 6
6 Getting started 7
7 Main menu and submenus 7
8 Probe 9
9 Roughness measurement 10
9.1 Selecting the length and the number of cut-offs according to ISO 4287 11
9.2 Selecting the cut-offs according to ISO 12085 (CNOMO) 12
10 Menu and status bar 12
10.1 Probe position 13
10.2 Setting roughness parameters and tolerances 13
10.3 Storing the measured values in the memory 14
10.4 Calibration 14
10.5 Delayed measurement 15
10.6 Selecting the unit system and the standard 15
10.7 Selecting the language 16
10.8 Setting the clock 16
11 Measurement results 17
11.1 Displaying the measurement results 17
11.2 Specific result request using direct command 17
12 Charging and replacing the battery pack 18
13 Technical data 19
14 Delivery programme 20
15 Optional accessories 20
16 Recycling 21
17 Warranty 21
18 Declaration of conformity with confirmation of the traceability
of all indicated values 21

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1 INTRODUCTION
You have purchased the compact TESA Rugo-
surf 20 and we thank you for your choice. To
help you to get the best performances from your
surface roughness gauge and to use it satisfac-
torily, we would advise to first read this manual
carefully.
To achieve reliable measurement results over a
long period of time, we would also recommend
to take all the precautions stated hereafter.
Your roughness gauge uses a cali-
brated stylus mounted at the probe
end. It is, therefore, advisable to
handle this unit with special care in
order to avoid shocks.
To keep it perfectly clean, use compressed air
under a pressure contained within 2 bars.
2 SAFETY PRECAUTIONS
– Make sure the indicated voltage matches that
of your mains supply.
– Do not attempt to dismantle the unit, except
for the parts listed in this manual. If you fail to
take this precaution, you might damage your
roughness gauge or cause a failure to occur.
– Do not subject the probe to stresses or
shocks. This sensitive component must be
handled with care.
– Do not use your roughness gauge in a dusty
environment, or have it exposed to vibrations.
Keep it away from appliances emitting noise
on the mains, such as air conditioners, trans-
formers or high-voltage relays.
– Do not use the gauge unit in places where
there may be excessive and sudden tempera-
ture variations. Do not leave it in a closed,
overheated room or exposed to direct sun-
light.
– Store your roughness gauge where tempera-
ture remains within -10°C to +50°C.
– Before you start measuring, remove any oil
spots or dust particles on the surface to be
inspected.
– Do not drop your roughness gauge. Avoid
shocks. Although solidly built, the measuring
system inside the unit may be damaged, thus
leading to incorrect measurement results.

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3 GENERAL DESCRIPTION
Your TESA-Rugosurf 20 is a compact surface
roughness gauge that is very easy to handle and
to use. This microprocessor-controlled gauge
uses a graphical LC Display. It is powered by a
rechargeable battery, which provides a remark-
able operating independence. All menus and
messages can be displayed in the most usual
international languages.
This gauge consists of an electronic unit, a built-
in drive unit. It allows the main roughness pa-
rameters on the surface finish to be measured
with a resolution to the nanometre. Whether
held in the hand, or clamped to a stand, this
versatile tool can face any conditions of use.
In order to avoid vibrations that could alter the
measurement results, you may switch it on and
start the measurement through the remote con-
trol itself or TESA Rugosoft. These two compo-
nents are optional.
The measuring length will be automatically
set when choosing either of the three cut-offs
available. However, the length may be changed
by selecting the number of cut-offs contained
within 1 and 5.
Your roughness gauge prevents and displays
any incorrect handling or irregularities. The
memory lets you store more than 1000 rough-
ness parameters or 20 measurements along
with graphical representations, which can be
recalled and further printed out at any time.
The most common functions, such as summon-
ing up the measurement results or the cut-offs
besides starting the measurement operations
are directly accessible from the keyboard while
any other function linked to measurable param-
eters is available as an auxiliary function. This
makes your part series inspection easier.
All presettings and other data related to the last
measurements you have taken will be stored
in the memory as you turn off your Rugosurf
20. Used with battery power, it switches off
automatically whenever it is left unused for
1 minute.
Each digital output enables a direct connection
of the gauge unit to a host computer using a
Micro-USB standard cable available from the
range of optional accessories.
With the gauge connected to a computer,
you can output a user-defined 3-line header.
Through the appropriate software installed on
the computer, you will be able to download or
modify all settings, let the measured values be
transferred, display graphics or print detailed
reports.

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4 ELEMENTS ON THE TOP FACE
Your roughness gauge can be entirely controlled
over the keys located on the right and the left of
the display screen.
Some keys are able to execute a function di-
rectly, while some others are used for selecting
the relevant menu or submenu that will let you
configure the gauge according to your needs.
The function of some keys will vary, depending
upon the conditions.
1START/STOP key
(starting/discontinuing a measurement).
2Graphical LC Display, black&white, 2 in.
3ENTER key (confirmation).
4Scroll key.
5Backward key.
Top face
5 ELEMENTS ON THE REAR FACE
1 2
3
4
1ON/OFF toggle switch used whenever the
gauge will be stored for a long period of time
(with ON directed to the right, if so).
2Mains connector for power supply.
3Micro-USB connector for data output.
4Printer connector.
Rear face
1 2
3
4
5

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6 GETTING STARTED
Switching on your roughness gauge is done by
toggling the mains switch to the right, and then
pressing down the START/STOP key (1). The
Startup screen disappears a few seconds later.
The gauge unit is then ready to measure and the
results of the measurement lastly carried out are
displayed.
Display switches off automatically when-
ever the gauge is left unused for 60 seconds.
Pressing any key within this short while caus-
es this stand-by condition to increase for 60
additional seconds.
Any menu, submenu or function susceptible to
be directly triggered from the keyboard will not
be accessible unless the gauge is powered up.
Your Rugosurf 20 can also be turned on from
the Rugosoft software.
Note
Turning the toggle switch to OFF then back to
ON will enable you to restart your gauge unit.
If your roughness gauge is left unused for a
long time, we would highly recommend to use
the toggle switch to have it totally powered
down. This way of doing will contribute to pre-
serve the battery.
7 MAIN MENU AND SUBMENUS
Structure
Every menu and submenu lets you control every
operating function.
The main menu appears on the display screen
in the following conditions:
1Once the gauge has been turned on.
2When the
ENTER-key is pressed down.
Available keys.
Confirming and accessing selected menu.
Moving the scroll key.
Getting back or quitting the menu.

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Main menu and submenus

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8 PROBE
Your Rugosurf 20 incorporates a translation
mechanism with the probe attached by means
of the height articulated probe-holder. In order
to swap the probe, simply pull it in its axis op-
posite to its displacement. For attachment, the
probe is just plugged in.
The measurements can be taken by lying down
the gauge unit on the surface to be checked.
But, you may also mount it on a support or use
its protection to rest it on the relevant surface.
Other supports can additionally be made avail-
able, rendering all measurement operations
easier.
When inspecting cylinders, use the auxiliary
supports that came with the roughness gauge.
Note
The probe comes with a built-in inductive meas-
uring system. Should this feature be swapped,
or important changes in the ambient conditions
occur, a calibration as described in chapter 10.4
will then be required.
For checking purposes, it is advisable to regu-
larly carry out a measurement on the standard
contained in the delivery scope.
Special parts or hard-to-reach locations can be
measured with the Rugosurf 20 clamped to the
standard support using the 8 mm diameter fix-
ing rod provided with the gauge. The latter will
be screwed into the convenient thread located
on the lower face of the gauge.
The two extra V-shaped supports allow for any
cylinder up to 80 mm in diameter to be meas-
ured. They will need to be attached on both front
and rear gauge faces.

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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.
1Whenever 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.
2Press the key on the left side of the
display screen to power up your roughness
gauge.
3Select the value together with the number of
cut-offs you want to use for the measurement
(see in the table below).
4Position 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.
5Press 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) Lt(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) Lt(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