TESA TWIN-SURF User manual

6912.175.2111 - V2 - 17.03.2022
1
Instruction Manual
TESA TWIN-SURF
PORTABLE ROUGHNESS GAUGE
This document is confidential and only to be used internally by the company that has purchased a TESA portable roughness
gauge. Before duplicating or transmitting it to third parties without any connection to the use of these instruments, an official
request has to be sent to TESA.

Instruction Manual for TESA TWIN-SURF
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TABLE OF CONTENTS
If you are using the PDF version of this document, you can directly access the required chapter by
clicking on the respective line of the table of contents.
1INTRODUCTION .............................................................................................................................................................4
1.1 Acknowledgements.................................................................................................................................................4
1.2 Warning...................................................................................................................................................................4
1.3 Copyright (document) .............................................................................................................................................4
1.4 Preamble.................................................................................................................................................................4
1.5 Symbols ..................................................................................................................................................................4
2PRESENTATION.............................................................................................................................................................5
2.1 General description.................................................................................................................................................5
2.2 Operation/ Short description...................................................................................................................................5
2.3 Overview keyboard and display..............................................................................................................................6
2.4 How to switch the instrument on/off........................................................................................................................6
2.5 Main functions.........................................................................................................................................................7
2.6 Transversal measurement ......................................................................................................................................7
2.7 Measuring surface roughness.................................................................................................................................8
3TECHNICAL SPECIFICATIONS.....................................................................................................................................9
4DELIVERY CONTENTS................................................................................................................................................11
4.1 System components .............................................................................................................................................11
4.2 Packaging .............................................................................................................................................................11
5INSTALLATION, SECURITY & MAINTENANCE.........................................................................................................12
5.1 Location.................................................................................................................................................................12
5.2 Place of use ..........................................................................................................................................................12
5.3 Lighting..................................................................................................................................................................12
5.4 Measuring surface ................................................................................................................................................12
5.5 Cleanliness............................................................................................................................................................12
5.6 Vibrations..............................................................................................................................................................12
6FUNCTIONS..................................................................................................................................................................13
6.1 Calibration.............................................................................................................................................................13
6.2 Parameters............................................................................................................................................................13
6.3 Measurement standard.........................................................................................................................................15
6.4 Cut-off length.........................................................................................................................................................16
6.5 Cut-off number......................................................................................................................................................17
6.6 Measurement length .............................................................................................................................................18
6.7 Measurement delay ..............................................................................................................................................19
6.8 Automatic return....................................................................................................................................................19
6.9 Positioning.............................................................................................................................................................20
6.10 Start Measurement ...............................................................................................................................................21
6.11 Stop Measurement................................................................................................................................................21
6.12 Measurement result display..................................................................................................................................21
6.13 Language..............................................................................................................................................................23
6.14 Switch wireless connection on/off.........................................................................................................................23
6.15 Store measurements.............................................................................................................................................23
6.16 Firmware update...................................................................................................................................................25
7TESA DATA-STUDIO SOFTWARE..............................................................................................................................26
7.1 Free software........................................................................................................................................................26
7.2 Activation of licence key for TESA DATA-STUDIO ..............................................................................................26
7.3 Deactivation of licence key for TESA DATA-STUDIO..........................................................................................27
7.4 Connection to the computer..................................................................................................................................28

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7.5 Code management ...............................................................................................................................................28
7.6 Report management .............................................................................................................................................31
8PORTABLE PRINTER ..................................................................................................................................................32
8.1 Connection............................................................................................................................................................32
8.2 Power supply.........................................................................................................................................................32
9TROUBLESHOOTING ..................................................................................................................................................33
10 REPLACING THE BATTERY .......................................................................................................................................34
11 ACCESSORIES.............................................................................................................................................................36
12 SPARE PARTS .............................................................................................................................................................38
13 RADIO CERTIFICATION ..............................................................................................................................................38
14 OPEN SOURCE SOFTWARE ......................................................................................................................................39
15 DECLARATION OF CONFORMITY .............................................................................................................................39
16 WARRANTY..................................................................................................................................................................39
ANNEX A: MIT / X11 License..............................................................................................................................................40
ANNEX B: APACHE 2.0 License........................................................................................................................................40

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1 INTRODUCTION
1.1 Acknowledgements
Dear user,
We would like to thank you for having chosen TESA as your metrology partner. We thank
you for your confidence in purchasing one of our high-end portable roughness gauge
TESA TWIN-SURF.
Your metrological concerns are important to us and we are convinced that this instrument
will meet your expectations. We are constantly striving to develop solutions adjusted to
your needs.
The result? Your satisfaction for many years. Our pleasure? To know that our products
help you meet your needs in research, development and production in a quick and
efficient way, and for a long time.
The whole TESA team welcomes you to our family of TESA product users.
Your TESA team
1.2 Warning
This instruction manual must be read by every technician or operator before the
installation, maintenance or use of the instrument. Not adhering to certain instructions
regarding its use could lead to malfunction or deterioration of the instrument.
1.3 Copyright
(document)
The content of this document has been created subject to subsequent modifications
without prior notice. All modification rights are reserved.
The french version is the reference language. All other language versions are only
translations.
1.4 Preamble
The TESA TWIN-SURF is the result of more than 80 years of experience in the conception
and production of high-precision measurement equipment. It has been designed to meet
the needs of a production environment and to offer its users an affordable, quick and
precise way for dimensional control of small or large workpieces in workshops or
laboratories.
This document describes the different procedures to be followed in order to allow for a
quick and easy handling of our portable roughness gauge TESA TWIN-SURF.
1.5 Symbols
Several different types of symbols are used in this manual. They give important
information that has to be taken into account in order to correctly use the measuring
instrument.
Position
Description
Not adhering to these instructions can lead to incorrect
measurement results.
Corresponds to an assistance for better use.

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2 PRESENTATION
2.1 General
description
TESA TWIN-SURF is a portable light and compact roughness tester controlled by a
microprocessor and powered by a NiMh battery capable of providing high autonomy.
The roughness tester is equipped with a high contrast monochrome OLED display.
A high-precision translation mechanism fit a light aluminium alloy base with an
interchangeable optical contact probe that can be rotated by 90° to enable transverse
measurement.
The vertical range of 250 µm and a horizontal range of 16 mm deliver a high accuracy with
a performance of calculation of 13 roughness parameters according to ISO 4287 / ISO
12085. Up to 51 roughness parameters are available with the TESA DATA-STUDIO
software premium version.
Thanks the last generation of USB type C connector, the instrument ca be recharged with
a charger connected to a power supply or through a computer connection.
The TESA TWIN-SURF BLUETOOTH version integrate a wireless module to communicate
with external digital systems such as tablets and smartphones equipped with the TESA
DATA-STUDIO software.
Three buttons on the top of the instrument make you able to define measurement
parameters, set tolerances on individual parameters and start the measurement. All
configurations are automatically saved in the internal memory.
The whole system is designed to minimize power consumption as it is portable and
powered by rechargeable battery.
The touch probe is the unit for acquiring data on the roughness of the surface to be
measured. A sensing head supports the probe, which uses an optical sensor to translate
the mechanism movement into an analogue electrical signal.
2.2 Operation/ Short
description
Fig. Description of the constitutive elements of the TESA TWIN-SURF
No.
Description
1
Touch probe + protection
2
START/STOP (Start/stop measurement)
3
Display
4
Navigation button
5
Confirm button
6
Aluminium base
7
Raising feet
1
2
3
5
6
4
7

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2.3 Overview
keyboard and
display
Press to power ON
or
Long press to power OFF
or
When device is ON, press to start a new
measurement
or
When measuring, press to stop the
measurement
or
In the navigation menu, press to go back in the
previous screen
Navigation menu to continue selecting the
various settings
Press to enter the menu from the main screen
or
In the navigation menu, press to select a
particular option
2.4 How to switch the
instrument on/off
To switch ON
Press the key
The instrument is automatically switched off 1,5 minute after the last key operation (30
minutes if connected via BLUETOOTH).
To switch OFF
Keep the key pressed until the display disappears. All settings are kept and will be
reloaded again next time the instrument is switched on.

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2.5 Main functions
Codes
By selecting this menu, you can save the results of your measurements in the instrument's
memory. The status of the memory can be viewed by means of a filling bar in the code menu
of the instrument.
Position
By selecting this menu it is possible to see the current Z position of the touch probe. There is
both an indicator showing its position within the available range and the value expressed in
μm.
Measurement set
By selecting this menu, it is possible to set the measurement parameters such as the
standard, the number of cut-offs, the length of the cut-off, a variable delay between the
moment the power button/start measurement is pressed and the actual start of the
measurement. It is also possible to choose between automatic and manual return.
Parameters
Selecting this item allows you to choose which roughness values to display at the end of the
measurement (by default only Ra is displayed).
Calibration
Selecting this menu allows the instrument to be calibrated using the roughness setting
standard supplied with the TESA TWIN-SURF roughness gauge.
System
Selecting this menu item allows you to perform three functions:
•Activate and deactivate Bluetooth®(only for the Bluetooth®version)
•Change the language from English, French, German and Italian
•Activate the reprogramming mode in order to reprogram the instrument, update the
firmware. Reprogramming process only possible through TESA DATA-STUDIO
software
2.6 Transversal
measurement
The probe holder permits the probe to swivel through 90° for inspecting a groove to depth.
The transversal measurement allows to reach surface not accessible in the standard axis.
For the probe swivel, please follow the procedure:
1. Unscew two screws to remove
the probe protection
2. Remove the probe by pulling out

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3. Rotate the probe holder
at 90°. You can use the
help of a flat screwdriver.
4. Connect the probe in the new position.
5. Perform a new calibration in this configuration
2.7 Measuring surface
roughness
1 Switch on the roughness tester. Set desired functions from the menus, if necessary.
2 Choose the appropriate cut-off value to be used for the measurement according the table
below (ISO 4288).
Ra (µm)
Cut-off (mm)
Lt (mm)
0,02 to 0,1
0,25
0,25 –1,25
0,1 to 2
0,8
0,8 –4,0
2 to 10
2,5
2,5 –12,5
3 Choose the number of cut-off. The number usually selected is 5 cut-offs. For space
reason, if the length is too long, you may change it by reducing the number of cut-off
used for the measurement.
4 Position the probe so that its axis lied as far as possible parallel to the surface the be
inspected. For checking purpose, use the menu Position, especially when access to the
point is not easy.
5 Start the measurement cycle by pressing on . But you may use also the software
TESA DATA-STUDIO to start remotely the measurement, to avoid any influence on the
measuring application.
Whenever possible, mount both the roughness tester and the work piece to
be measured on a rigid testing surface, free from vibrations. Clean the
surface to be checked thoroughly. While holding the unit in the hand, be
sure you don’t move during the measurement operation. If needed, take
several measurements for comparison purposes. If one of them is varying
by far from the others, this means that the unit has been moved during the
exploration. The accessories that came with the unit (probe, probe guard
and raising feet) make positioning easier.

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3 TECHNICAL SPECIFICATIONS
Part number
TESA TWIN-SURF roughness gauge No. 06930014
TESA TWIN-SURF BT roughness gauge No. 06930015
Standard
According to ISO 3274 - ISO 4287 - ISO 12085
Parameters
Parameters according to ISO 4287:
Ra –Rq –Rt –Rz –Rc - Rmax - RSm - RPc
Parameters according to ISO 12085:
Pt –R –AR –Rx –PPc
Additional parameters with software TESA DATA-STUDIO
Premium version (with license):
Parameters according to ISO 4287:
Rp –Rv –Rsk –Rku –RΔq –RΔa –Rmr rel –Rδc –Rmr(c)
Pa - Pq - Pp –Pv –Pt –Pc –RPc - R3z
Psk –Pku - PSm- PΔq - Pmr rel –Pδc –Pmr (c)
Rk –Rpk –Rvk - A1 –A2 - Mr1 –Mr2
Parameters according to ISO 12085:
Rke –Rpke –Rvke - A1e –A2e –Mr1e –Mr2e
Measuring range (Z)
Ra 0 to 50 µm
Rt 0,05 to 200 µm
Total length (X)
(Numbers of cut-offs + 1) x Lc
(maximum 17,5 mm)
Traverse length (X)
Numbers of cut-offs x Lc
Filter λs
Λc/ λs: 30 – 100 –300 (According to ISO 3274)
Resolution
0,001 µm / 0,01 µinch
Cut-off length
0,25 –0,8 –2,5 mm (According to ISO 4287)
1,5 –2,5 –4 –8 –12 –16 mm (According to ISO 12085)
Number of cut-offs
1 up to 5
Electronic filter
GAUSS filter to ISO 11562
Max permissible error
0,05 µm + (5 % R), R = Roughness in µm
Probing system
Optical
Diamond-like stylus
R=2 µm, 90°
Measuring force
0,75 mN (According to ISO 3274)
Displacement speed
0,5 –1 mm/s (measuring and positioning)

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Keyboard
Three-key tactile keyboard protected against dust particles and oil
splashes IP67
Selectable languages
English, Italian, German, French, Spanish, Portuguese, Chinese,
Japanese, Korean
App TESA DATA-STUDIO:
English, Italian, German, French, Spanish, Portuguese, Chinese,
Japanese, Korean
Display
OLED display monochromatic 128x64 pixels
Power supply, battery
USB-C charger
Battery pack 2,4 V, 750 mAh
Type NiMh
Main power supply 100-240 V, 50/60 Hz
USB maximum voltage 5V
Operating temperature range
+15 to +30°C
Storage temperature range
-10 to +50°C
Full battery recharging time
50 minutes
Battery life
about 300 measurements (0,8x5)
Inside memory
< 18 000 roughness parameters (0,8x5) or 30 measurements with
graphical representations
Connectors
USB-Typ C (PC)
Dimensions
160 x 34 x 34 mm (roughness gauge alone)
Weight
200 g
Packaging
Suited plastic case
Origin
EU
Countries for which the
wireless transmitter is
approved
Only for 06930015
EU, USA, Canada, Japan, Taiwan, South Korea
Brazil, Australia and New Zeeland.
For other countries, please contact us.

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4 DELIVERY CONTENTS
4.1 System
components
Each configuration is composed of the following elements:
Description
TESA TWIN-SURF roughness gauge
SB 51 probe
Article number 06960094
Main charger with EU and US charger adaptors
Article number 04760150
Roughness setting standard Ra = 2,97 µm
Article number 06960041
Adapter for 8 mm diameter support
Article number 056633
Key to remove the probe protection
USB-A-C cable
USB key including:
•TESA DATA-STUDIO software
•User manual
•Measuring report
•Declaration of conformity
Transport suited case
4.2 Packaging
The elements that constitute the packaging of the TESA TWIN-SURF are very important,
therefore you should keep them. It is absolutely necessary to use the original packaging when
transporting the instrument in order to avoid any unfortunate deterioration which could cause
malfunction or complete impossibility to use the instrument.

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5 INSTALLATION, SECURITY & MAINTENANCE
5.1 Location
The instrument has to be installed in a location satisfying the general required conditions, but
also the specific and very precise conditions regarding the environment, power supply, etc. It
is essential to be able to identify important factors and to correctly prepare the zone the
instrument is installed and used in.
5.2 Place of use
In order to use the instrument correctly, the following precautions have to be taken into
account:
•Avoid placing the instrument close to a window, door, cooling or heating system.
•Avoid causing recurrent temperature variations due to direct exposure of the instrument to
the sun.
5.3 Lighting
Use indirect or fluorescent light. Avoid direct exposure to the sun or any other strong light.
5.4 Measuring surface
Choose a surface free of any vibrations that could lead to measurement or reading errors
despite the stability of the mechanical and electronic components.
Make sure that the surface can carry the weight of the machine and the workpiece to be
measured. Ideally, the surface should not have any splits or joints.
It is recommended to use a measuring surface that is big enough to enable smooth and easy
movements of the instrument around the workpiece to be measured if the latter cannot be
displaced manually.
5.5 Cleanliness
Make sure that the measuring surface is clean, so that there is no dust, condensation or metal
filings.
5.6 Vibrations
Floors of companies are constantly at risk of vibration due to different reasons:
CNC and other machines, transportation vehicles and any other source of vibrations. These
vibrations can directly influence the metrological performances of the machine.

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6 FUNCTIONS
6.1 Calibration
To perform instrument calibration, enter main menu and select the item Calibration through
the key . The following screen appear.
The steps are as follows:
1. Enter nominal value: Move with the button to the box with the numerical
value and change the value by pressing until the desired value is obtained.
2. Start calibration: when the desired value is displayed, press to go to the
start measure item, then press to start the calibration.
3. At the end of the measurement, the message calibration done is shortly displayed.
No data is now available on the main menu. Perform a new measurement to display
the last measuring value.
Calibration with Ra if ISO 4287 standard
Calibration with R if ISO 12085 standard
Calibration based on a measurement average is available from the software
TESA DATA-STUDIO with max 5 measurement for a calibration.
6.2 Parameters
To access the parameters selection screen, enter the main menu and select the Parameters
item through the key . The following screen appear.

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Parameters enabled for displaying are marked with the icon while those that are not
enabled are marked with the icon .
To access the parameters options setting screen, move to the desired parameters using the
button then confirm by pressing .
The following screen appear.
1. To enable / disable the parameters, go to the icon with button then
press .
2. To enable / disable tolerance, go to check box Tol with button and press
to enable the tolerance.
3. Set the tolerances values:
Upper tolerance is the first value. Lower tolerance is the second value. Move on the
desired digit with the button and press to set the wished value.
4. When finished, press to go back to the Parameters screen.
If a code has already been selected, no parameter modification is available.
If you want to modify the parameters displayed with your code, proceed to
the code modification only through TESA DATA-STUDIO.

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6.3 Measurement
standard
To change the measurement standard, enter the main menu and select the item Set measure
with button .
The following screen appear.
Press to go in the Standard item and confirm with button .
The following screen appear.
Go to the desired item with and confirm by pressing
If ISO 428 has been selected, it is also possible to choose the unit of the measurement
between millimeters (mm) and inches (inch) by selecting the desired unit with and
confirming with button .
Press to go back to Set measure screen.
If a code has already been selected, no parameter modification is available.
If you want to modify the parameters displayed with your code, proceed to
the code modification only through TESA DATA-STUDIO.

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6.4 Cut-off length
To change the cut-off length, enter the main menu and select the item Set measure with
button .
The following screen appear.
Press to go in the Cut-off L. Item and confirm with button .
The following screen appear.
The value currently in use is displayed larger than the other values. To change the value, go to
the desired item with and confirm by pressing .
Press to go back to Set measure screen.
Cut-off length only available for ISO 4287 standard

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6.5 Cut-off number
To change the cut-off number, enter the main menu and select the item Set measure with
button .
The following screen appear.
Go to the item Cut-off No. with button and confirm with button .
The following screen appear:
The value currently in use is displayed larger than the other values. To change the value, go to
the desired item with and confirm by pressing .
Press to go back to Set measure screen.
Cut-off number only available for ISO 4287 standard

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6.6 Measurement
length
To change the measurement length, enter the main menu and select the item Set measure
with button .
The following screen appear.
Go to the item Meas. L with button and confirm with button .
The following screen appear.
The value currently in use is displayed larger than the other values. To change the value, go to
the desired item with and confirm by pressing .
Press to go back to Set measure screen.
Measurement length only available for ISO 12085 standard

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6.7 Measurement
delay
To change the measurement delay, enter the main menu and select the item Set measure
with button .
The following screen appear.
Go to the item Delay with button and confirm with button .
The following screen appear.
The value currently in use is indicated by the cursor position at the bottom.
To change the value, go to the desired item with button and confirm by pressing .
Press to go back to Set measure screen.
The value unit is in seconds.
6.8 Automatic return
To change the automatic return of the probe after measurement, enter the main menu and
select the item Set measure with button .
The following screen appear.

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Go to the item Return with button and confirm with button .
The following screen appear.
The value currently in use is indicated by the indicator next to the corresponding text.
To change the value, go to the desired item with button and confirm by pressing .
Press to go back to Set measure screen.
6.9 Positioning
This menu option, which allows you to check the correct probe position against the surface to
be explored, is very useful in the following two cases:
•When measuring grooves or bores.
•Prevent the probe from moving right up to the limit of the measuring area as the probe
body is contacting the surface or ensures that the probe is still contacting the surface,
otherwise the measurement will be interrupted.
•When measuring critical surface.
Serves for positioning the probe correctly on concave or convex surfaces.
Enter the Position menu.
The following screen appear:
By manually moving the tip the indicated position should move accordingly.
Once correct operation has been verified, press to go back to the main menu.