Schmidt ET Series User manual

Tension Meter
ET Series
Model ETB
ETPB
Edition ETB 01.E
Instruction Manual
Valid as of: 01.11.2018 • Please keep the manual for future reference!
S C H M I D T
c o n t r o l i n s t r u m e n t s

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Contents
1 Warranty and liability ............................................................................................... 4
1.1 Notices within the operating instructions................................................................ 4
1.2 Responsibilities of the operating company............................................................. 4
1.3 Responsibilities of the personnel ........................................................................... 4
1.4 Informal safety measures....................................................................................... 5
1.5 Training of the personnel ....................................................................................... 5
1.6 Intended use .......................................................................................................... 5
1.7 Dangers in handling the device.............................................................................. 5
1.8 Copyright................................................................................................................ 5
1.9 Declaration of conformity, RoHs II and WEEE registration .................................... 5
2 Available Models....................................................................................................... 6
2.1 Specifications ......................................................................................................... 6
2.2 Connecting the tension meter ................................................................................ 7
2.3 Delivery includes .................................................................................................... 7
2.4 Unpacking .............................................................................................................. 7
3 Operations................................................................................................................. 7
3.1 Notes before starting measurement....................................................................... 7
3.1.1 ID Plate, CE Mark, Calibration Label................................................................ 8
3.1.2 Removing the Filament Guide ......................................................................... 8
3.1.3 Mounting the Filament Guide .......................................................................... 9
3.2 Operating and display elements............................................................................. 9
3.3 Setup.................................................................................................................... 11
3.3.1 Charging the Battery....................................................................................... 12
3.3.2 Switching the tension meter on ...................................................................... 12
3.3.3 Switching the tension meter off ...................................................................... 12
3.4 Tension meter settings......................................................................................... 12
3.4.1 Material menu................................................................................................. 14
3.4.2 Password........................................................................................................ 14
3.4.3 Factory reset................................................................................................... 15
3.5 Operation procedure ............................................................................................ 15
3.5.1 Zero adjustment of the measurement position ............................................... 15
3.5.2 Inserting and removing material to be measured ........................................... 16
3.5.3 Damping ........................................................................................................ 16
3.5.4 Using the alarm function ................................................................................ 17
3.5.5 Cal. Adjustment .............................................................................................. 17
3.6 Creating a material characteristic......................................................................... 18
3.6.1 Setup for calibration........................................................................................ 18
3.6.2 Calibration procedure ..................................................................................... 19
3.6.3 Verifying the calibration .................................................................................. 21
3.7 Memory functions................................................................................................. 22
3.7.1 Save data ....................................................................................................... 22
3.7.2 Displaying the saved measured values.......................................................... 22
4 Service and maintenance....................................................................................... 23
4.1 Rollers .................................................................................................................. 23
4.2 Replacing the Rollers/Ceramic Pins .................................................................... 24

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5 Cleaning................................................................................................................... 27
6 Verification interval ................................................................................................ 27
7 Correspondence ..................................................................................................... 27
8 Repairs..................................................................................................................... 27

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1 Warranty and liability
In principle, the supply of the device is subject to our “General Conditions of Sale and
Delivery.” These have been provided to the operating company on conclusion of the
contract, at the latest.
Warranty:
- SCHMIDT tension meters are warranted for 12 months.
Parts subject to wear, electronic components and measuring springs are not covered by the
warranty. No warranty or liability will be accepted for bodily injury or property damage resul-
ting from one or several of the following causes:
- Misuse or abuse of the device.
- Improper mounting, commissioning, operation and maintenance of the device
(e.g. verification interval).
- Operation of the device if any safeguards are defective or if any safety and protection
precautions are not properly installed or not operative.
- Failure to comply with the notices in the Operating Instructions regarding transport,
storage, mounting, commissioning, operation, maintenance and setup of the device.
- Any unauthorized structural alteration of the device.
- Insufficient inspection of device components that are subject to wear.
- Opening the device or improper repair work.
- Disasters caused by the effects of foreign objects or by force majeure.
1.1 Notices within the operating instructions
The fundamental prerequisite for the safe handling of this device and its troublefree opera-
tion is the knowledge of the basic safety notices and safety instructions.
These Operating Instructions contain the most important notices for the safe operation of
the device.
These Operating Instructions, in particular the safety notices, must be observed by any
person who works with the device. In addition, the local valid rules and regulations for the
prevention of accidents must be complied with.
The representations within the Operating Instructions are not true to scale.
The dimensions given are not binding.
General indications of direction, such as FRONT, REAR, RIGHT, LEFT apply when view-
ing the front of the device.
1.2 Responsibilities of the operating company
In compliance with the EC Directive 89/655/EEC, the operating company agrees to only
permit persons to work with the device who:
- are familiar with the basic regulations on industrial safety and accident prevention and
who have been trained in handling the device.
- have read and understood the chapter on safety and the warning notices in these
Operating Instructions and have confirmed this with their signatures.
- are examined regularly on their safe and conscientious working method.
1.3 Responsibilities of the personnel
All persons who work with the device agree to perform the following duties before starting
work:
- to observe the basic regulations on industrial safety and accident prevention.
- to read the chapter on safety and the warning notices in these Operating Instructions and
to confirm with their signatures that they have understood them.

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1.4 Informal safety measures
The Operating Instructions must always be kept on hand where the device is operated.
Apart from the Operating Instructions, the generally and locally valid regulations on acci-
dent prevention and environmental protection must be provided and complied with.
1.5 Training of the personnel
Only trained and instructed personnel is permitted to work with the device. The responsi-
bilities of the personnel must be clearly defined for mounting, commissioning, operation,
setup, maintenance, and repair. Trainees may only work with the device under the super-
vision of experienced personnel.
1.6 Intended use
The device is intended exclusively to be used as a tension meter. Any other use or any
use exceeding this intention will be regarded as misuse. Under no circumstances shall
HANS SCHMIDT & Co GmbH be held liable for damage resulting from misuse.
The intended use also includes:
- Complying with all notices included in the Operating Instructions and observing all
inspection and maintenance works.
1.7 Dangers in handling the device
The device was designed according to the state of the art and the approved safety stan-
dards. Nevertheless, its use may cause serious or fatal injury to the user or third persons,
and/or an impairment of the device or of other material assets.
The device may only be applied:
- For its intended use in a faultless condition with regard to the safety requirements.
- Malfunctions that could impair safety must be remedied immediately.
- Personal protective equipment must be used according to the EC Directive 89/686/EEC.
The device must not be operated in potential explosive areas and must not
come into contact with aggressive substances.
1.8 Copyright
The copyright on these Operating Instructions remains with the company
HANS SCHMIDT & Co GmbH.
These Operating Instructions are intended for the operating company and its personnel
only. They contain instructions and notices that may only be reproduced on the prior writ-
ten permission of
HANS SCHMIDT & Co GmbH
and under indication of the complete reference data.
Violations will be prosecuted.
1.9 Declaration of conformity, RoHs II and WEEE registration
In compliance with the EU Directives 2014/30/EU and 2011/65/EU
HANS SCHMIDT & CO GmbH is registered in compliance with
the German Electrical and Electronic Equipment Act (ElektroG)
under WEEE Reg. No. DE 48092317.

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2 Available Models
The standard series is also available with the following modifications
(customized versions): - Special calibration using customer supplied material.
* Outer distance between outside guide rollers / pins
** Suitable for 95% of all applications. PA = Polyamide Monofilament.
If the material to be measured differs significant from the SCHMIDT calibration
material in diameter, rigidity, shape, etc., we recommend calibration using customer
supplied material. For this purpose a material sample of about 5 m should be
supplied. International unit of tensile force: 1 cN = 1.02 g = 0.01 N
ETB: Calibration with approx. 100 m/min
ETPB: Calibration with approx. 60 m/min
Model
Tension
Ranges
cN
*Measuring
Head Width
mm
SCHMIDT Calibration
with running filament
ETB-100 0.3 - 100.0 24 PA: 0.20 mm Ø
ETB-200 2.0 - 200.0 24 PA: 0.20 mm Ø
ETB-500 2.0 - 500.0 24 PA: 0.20 mm Ø
ETPB-100 0.3 - 100.0 22 PA: 0.20 mm Ø
ETPB-200 2.0 - 200.0 22 PA: 0.20 mm Ø
ETPB-500 2.0 - 500.0 22 PA: 0.20 mm Ø
Calibration: According to SCHMIDT factory procedure
Units of Measure: cN, g, N, lb, user selectable
Accuracy: ± 1% FS* ± 1 digit (typical ± 0.5% FS*)
Resolution: 0.1 cN
Overrange: 10% FS*, without accuracy guarantee
Overload Protection: 200% FS*
Measuring Principle: Strain gauge bridge
Meas. Roller Deflection: 0.5 mm, max
Signal Processing: Digital
Damping: moving electronic (averaging)
Sampling rate internal: Approx. 1 KHz
Sampling rate: 200 Hz, 2 Hz: AVG, MIN and MAX
Display Update Rate: 2 times per second
Display: Colour TFT 128 x 160
Memory: Average, last value, MAX, MIN
Communication frequency: max. 200 readings/sec
Temperature Coefficient: Gain: less than ± 0.01% FS*/°C
Temperature Range: 10 - 45° C
Air Humidity: 85% RH, max.
Auto Power Off: Automatical after approx. 3 min. of non-use
Power Supply: LiPo accumulator (20 h continouse use, 3 ½ charging time),
USB AC adapter 100 ... 240 V AC with 4 adapters (EU/USA/
UK/AUS-NZ)
Housing Material: Aluminium
Housing Dimensions: 182 mm x 54 mm x 41 mm (L x W x H)
Weight (net /gross): Approx. 310 g / 1220 g
*FS = Full Scale
2.1 Specifications

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The requirements of the CE specification are only complied with if the
tension meter is equipped and operated with equipment supplied by HANS
SCHMIDT & Co GmbH. Certification to the CE specification does not extend
to, and shall be invalid for any other combination. For damage resulting the-
reby we assume no liability.
2.2 Connecting the tension meter
V-Groove Line Speed
m/min ... max.
Roller
Material
Standard 2000 Hardcoated
aluminium
V-Groove Line Speed
m/min ... max.
Roller
Material
Standard 6000 Oxide
ceramic
ETX Guide Rollers: ETPX Guide Pins:
2.1 Specifications
1 Tension meter with accumulator
1 USB AC adapter with 4 adapters (EU/US/UK/AUS-NZ)
1 USB cable
1 Tension Inspect 3 Software for PC WIN XP or higher
1 Certificate of compliance with the order 2.1 under EN 10204
1 Operating Instructions
1 Carrying case
2.3 Delivery includes
2.4 Unpacking
Unpack the tension meter and inspect it for any shipping damage. Notices of defect must
be announced immediately, in writing, at the latest within 7 days on receipt of the goods.
Have you read and understood the Operating Instructions, in particular
Chapter 1 “Basic Safety Notices” ?
You are not permitted to operate the tension meter before doing so.
Before working with the instrument you must put on your personal protective
clothing, if necessary. For example, eye protectors, gloves, etc.
To avoid damage do not move the center roller by hand.
Tensions that exceed the tension range of the instrument by more than
100 % may cause permanent damage to the measuring spring and must be
avoided under any circumstances.
3.1 Notes before starting measurement
3 Operations

8
ID plate with serial number
and CE mark
Calibration label
(option)
SCHMIDT Quality Seal
fig. 3.1.1
3.1.1 ID Plate, CE Mark, Calibration Label
3.1.2 Removing the Filament Guide
(see also chapter 5.2)
The tension meter is supplied with a filament guide for fast and easy material
acquisition. For application in hard-to-reach areas with limited access space, you can
remove the filament guide.
Removal:
- Loosen the grub screws (2x) with the supplied screwdriver
(blade width 1.5 mm).
- Unscrew and remove the guide rollers (2x) with the supplied open end
wrench (jaw width 4 mm).
- Slip the filament guide off the roller shafts.
- Screw the guide rollers (2x) back on to the roller shafts and carefully
tighten them with the supplied open end wrench (jaw width 4 mm) until hand-tight.
The ID plate with the CE mark and the serial number as well as the calibration
label (optional) are provided on the backside of the instrument, the SCHMIDT
Quality Seal is provided on the right side.
Guide rollers (2x)
Roller shafts (2x)
Filament guide
Grub screws (2x)
Measuring roller
fig. 3.1.2
Setscrew (3x)

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3.1.3 Mounting the Filament Guide
Mounting:
- Unscrew and remove the guide rollers (2x) with the supplied open end
wrench (jaw width 4 mm).
- Slip the filament guide on to the roller shafts.
- Screw the guide rollers (2x) back on to the roller shafts and carefully
tighten them with the supplied open end wrench (jaw width 4 mm) until hand-tight.
- Push the filament guide forward far enough to ensure that the rollers do not rub
against the filament guide and that the process material can slide unhindered from
the filament guide into the roller grooves (fig. 3.0.2 center line).
- Carefully tighten the grub screws (2x) with the supplied screwdriver until
hand-tight.
3.2 Operating and display elements
1Guide rollers
2Measuring roller
3Filament guide
4Display
5Lever
6„MEMORY“ key
7Arrow key
8„SET / DAMP“ key
9„ESC / EXIT“ key
10 „POWER / ZERO“ key
11 Power connector
fig. 3.2b
fig. 3.2a
1 2 3 4 5 6 78 9 10 11
fig. 3.1.3
Center Line

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Numeric display
Info on material
Damping
Current reading
Data stored in the memory
Battery status indicator
Measurement unit
MIN/MAX Alarm
fig. 3.2c
Cal. adjustment
Info on material
Damping
Current reading
Readings
between the
alarm values
Data stored in the memory
Battery status indicator
Measurement unit
MIN/MAX Alarm
fig. 3.2d
Cal. adjustment
Tension range
Current reading as
bar graph
3.2 Operating and display elements
Display with bargraph

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3.2 Operating and display elements
Graphic display
The Y-axis can be scaled with the and buttons.
3 Scalings: total measuring range, set limits range plus approx. 1/3 of MAX.-alarm
value and minus approx. 1/3 of MIN.-alarm value, if limit values are entered and
the damping is not activated.
With the or button the X-axis can be scaled. The setting range is 2 to
60 sec.
The scaling can also be changed during the measurement, whereby values alrea-
dy displayed are deleted when the X-axis is changed.
Damping
Measured values
as graph
Tension range
Data stored in the memory
Battery status indicator
Measurement unit
Measured
values
as graph
fig. 3.2e
Info on material
Cal. adjustment
Readings
between the
alarm values
length of the
time axis
3.3 Setup
The tension meter is delivered with a built-in rechargeable LiPo battery, which has been
charged at the factory. The tension meter can only be switched on if the battery is still
working, i.e. if the battery has enough charge. If the instrument does not power up or if
the battery level indicator shows a low charge after power-up (Chapter 3.3.2), the
battery needs to be recharged.
To ensure maximum battery life, avoid discharging it completely or charging
it frequently for short periods. The battery should not be stored for a exten-
ded period of time when empty. After a maximum storage period of one year,
the battery has to be recharged.

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3.3.1 Charging the Battery
The battery can only be charged at a temperature between +5 °C
and +45 °C.
Before you connect the AC adapter, verify that the supply voltage is correct
(100 V - 240 V).
HANS SCHMIDT & Co. GmbH provides no warranty or liability for any
damage resulting from the use of AC adapters from other manufacturers.
To charge the battery, remove the rubber stopper from the USB interface. Than connect
the cable of the AC adapter to the USB output.
The battery can also be charged by connecting the USB cable to a PC.
When the battery is fully charged, the battery level indicator will be shown full .
The charging time is approx. 3 ½ hours (using the AC adapter).
Battery overcharging is not possible
3.3.2 Switching the tension meter on
Press and hold the button (for approx. 1 sec.) until the DISPLAY shows the
measuring range, the software and hardware versions, e.g. E 1.0, and then “0”.
During startup, the tension meter performs an automatic zero adjustment. If the tension
meter does not display zero, perform a manual zero adjustment procedure (see chapter
3.5.2).
Holding the button makes the display freeze so that you can read the measuring
range and the software and hardware versions.
While switch-on the tension meter, make sure not to move it. Otherwise, the
automatic zero adjustment will be faulty.
3.3.3 Switching the tension meter off
Automatic switch-off (if enabled):
- After an idle period of 3 minutes, the tension meter switches off.
Manual switch-off:
- Press and hold the button for 5 seconds.
3.4 Tension meter settings
- Press the and buttons simultaneously to access the main menu.
- The and buttons can be used to select the various menu items of the main menu,
the submenus and the settings menus.
- Press the button to open the selected menu; by pressing the or button you can
close the menu without saving changes.
- In menus with multi-digit fields (e.g. date) use the and buttons to move forward
and backward between digits.
- Press the button to save the settings and exit the settings menu or press the
button to exit the current menu without saving.
- To exit the main menu press the button.

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Main Menu Submenu Settings Menu Description
Material [1] to [4] Chapter 3.4.1 Material-Set-up
Cal.
Adjustment —[-10 %] - [+ 10 %] Chapter 3.5.6
Display
Chapter 3.2 —
[numeric]
[Bargraph]
[Graphic]
• Measuredvaluedisplayedasnumber
and alarm monitoring
• Measuredvaluedisplayedasnumber,
bar graph trend display and alarm
monitoring
• Measuredvaluedisplayedasgraphical
trend, measured value/limit values as
graph
Alarms — [ON], [OFF]
Activate/deactivate the alarm for all
calibrations.
The alarm of a material characteristic is
only active if the [Alarm] menu item in
Material Setup is activated as well.
Display
Settings
Backlight [ON], [AUTO]
Switch the display light on or off. With
the AUTO setting, the light switches on
and off automatically depending on the
ambient light.
Brightness [1], [2], [3] Set the display brightness.
Colortheme [white], [black] A white or black display background can
be adjusted
Screen
Rotation
[0°], [90°], [180°];
[270°], [AUTO]
To set the display orientation to be fixed
or to automatically adapt to the current
orientation of the device.
System
Settings
Tension Unit [cN], [g], [lb], [N],
Set the measurement unit.
The available units may vary depending
on the measuring range of the device.
Auto Power
Off
[ON],
[OFF]
Toggle the „Auto Power off“ function on
and off.
Language [EN], [DE] Select between the english and german
user language.
Date/Time [Time], [Date],
[Timeformat] Set the time, date, and date/time format.
Password [0], [1], [2], [3] Chapter 3.4.2
Factory reset Reset to the factory settings.
3.4 Tension meter settings
Factory settings are illustrated bold

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Material Setup Submenu Settings Menu Description
No. of the cha-
racteristic mate-
rial curve 1 - 4
—
[character],
[numbers],
[special character]
to enter a name for the selected mate-
rial characteristic. The name can also
been adjusted by using the provided
software
Damping — [1] - [9]; [5] Chapter 3.5.3
Alarms — [ON], [OFF] To activate or deactivate the alarm
function for the material characteristic.
High limit — [0000] - [9999]
If the set limit value is exceeded, the
display reads
MAX-ALARM.
Low limit — [0000] - [9999]
If the value falls below the set limit
value, the display reads
MIN-ALARM.
Calibration
Chapter 3.6.2
Start To perform a calibration, follow the in-
structions shown on the display.
Cal. Points
between [5 %] and
[90 %] of the
tension range
Set three calibration points for which a
calibration should be performed.
Weights [cN], [g] Set the unit of the calibration weights
used.
3.4.1 Material menu
In the material menu you can make the settings for the selected material characteristics and
perform the calibration. To perform the calibration, the weights for the selected calibration
points must be available.
Factory settings are illustrated bold
3.4.2 Password
By setting a password, you can block the access to some menu parts for unauthorized
users. Therefor are 3 protection levels:
0 All menus are accessible (Factory setting)
1 The system setting menu is locked
2 The material, system setting, memory setting and cal. adjustment menus are locked
3 All menus are locked.
Apply the password protection
- Select the menu password (chapter 3.4)
- Insert a password and choose a protection level
- Exit the main menu, to apply the password protection
The factory setted password is „0000“
If you forgot the password, please contact HANS SCHMIDT & Co GmbH to request
the master password.

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Requirements:
- Switch the tension meter on (chapter 3.3)
- Define the required tension meter settings (chapter 3.4)
- Select the desired material characteristic (chapter 3.4.1)
- Bring the tension meter into the desired measuring position and carry out a zero
adjustment as described in chapter 3.5.1, if required.
3.5 Operation procedure
3.4.3 Factory reset
A factory reset resets the tension meter to its original manufacturer settings. This proce-
dure will delete all settings, including any customer-defined material characteristics
(calibrations); the factory calibration, however, will be kept.
Customer calibrations will be deleted.
3.5.1 Zero adjustment of the measurement position
Each time the measurement position is changed, the tension meter will automatically
perform a zero adjustment.
If the tension meter does not display zero in its measuring position, perform
a manual zero adjustment procedure.
For this purpose, no material to be measured must have been inserted yet!
Requirements:
- The tension meter has been switched on as described in chapter 3.3.2.
To carry out zero adjustment:
- Bring the tension meter into the desired measuring position and make sure not to
move it.
- Press the button.
The Display momentarily shows
0 0 0 0
and then switches to
0
cN
.
The tension meter is now adjusted to its new measuring position and ready to take
measurements.

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3.5.2 Inserting and removing material to be measured
Inserting the material to be measured:
- Press the lever to tilt the outer guide
rollers sidewards.
- Thread the material to be measured
through the measuring and guide rollers
(filament guide).
- Slowly release pressure on the lever
until the guide rollers return to their
original position.
It is important to assure that the material
to be measured runs smoothly between
the measuring and guide rollers.
Measuring:
The display now shows the measured
tension values.
To remove the material to be measured:
- Press the lever and remove the material
to be measured.
- Slowly release pressure on the lever until
the guide rollers return to their original
position.
fig. 3.5.2
Material to be
measured
Measuring
roller
Lever
Guide rollers
3.5.3 Damping
Feature to be used for tensions that vary strongly
In the Damping menu (chapter 3.4.1), you can specify separate damping factors for
each material characteristic. Back in the display mode, press the button to activate or
deactivate the damping function. This is recommended if the displayed values vary stron-
gly. Press the button to increase the damping value or the button to decrease it.
Changes made to the damping factor using the arrow keys are not saved perma-
nently in the material characteristic. If you disable the damping feature or select
a different material characteristic, the damping factor will be reset to the value
originally saved for the material characteristic.
The factory setting for the damping factor is 5. The average shown on the display is
calculated as follows:
5 old measured values + 4 new measured values
9
Damping can be changed in 9 steps from 01 = low damping:
1 old measured value + 8 new measured values
9
to 9 = high damping:
8 old measured values + 1 new measured value
9

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3.5.4 Using the alarm function
Requirements:
In the Material Setup menu, make sure that the MIN and MAX limit values have been set
for each material characteristic.
The limit value alarm has to be enabled in the main menu.
3.5.5 Cal. Adjustment
By performing a calibration adjustment, you can adjust a material characteristic
calibrated for a particular material to a different material or diameter without creating
a new material characteristic.
Requirements:
- Prepare the measuring setup as shown in Fig. 3.5.5a.
- Select the desired material characteristic (chapter 3.4.1).
- Move the tension meter into the desired measuring position and carry out a zero
adjustment, if required.
Adjusting:
- Select the „Cal. Adjustment“ menu item from the main menu (Fig. 3.5.5b)
- Insert the material to be measured (chapter 3.5.2) and push the thumbpiece into the
measuring position.
- Press the or key to perform the calibration adjustment until the value on the
display corresponds to the weight suspended to the material.
The adjustment can be performed in 1 % steps within the range from + 10 % to - 10 %.
- Press the button to save the determined value.
Please note that this is a general value. So determine it separately for each mate-
rial characteristic and note it down for later reference. It is not possible to save it
per material characteristic.
To disable calibration adjustment, reset the value to 0 % in the „Cal. Adjustment“
menu.
fig. 3.5.5b
fig. 3.5.5a
Weight
Material to be
measured
Guide roller
Guide roller
Measuring
roller
The calibration adjustment has to be conducted with the weight unit, that is
adjusted in the menu „tension unit“ and must carried out with weights
corresponding to the choosen unit.

18
3.6 Creating a material characteristic
The tension meter has been calibrated dynamic on material 1 according our SCHMIDT
procedure for a vertical material path and cannot be deleted or overwritten. The material
and diameter is given in chapter 2. Factory calibrations using customer supplied materi-
als follow the same procedure. In this case, however, the calibration on Schmidt material
1 is omitted. Fig. 3.6.1a shows a measuring setup for the dynamic calibration, while fig.
3.6.1b shows a measuring setup for the static calibration.
The material characteristics has been preset in the factory and cannot be over-
written. For these material characteristics, you can only change the damping fac-
tor, the alarm function setting, and the limit values.
3.6.1 Setup for calibration
Hang twice the weight (pulley effect) which corresponds to the tension to be
measured from the measured material, vertically, as shown here. Please keep
in mind to include the weight of the lower deflection pulley when you calcula-
te the suspended weight.
Running direction of the material to be
measrued
Line speed Vmax. = ETX 100 m/min
Vmax. = ETPX 60 m/min
Hang twice the weight (pulley effect) which
corresponds to the tension to be measu-
red from the measured material, vertically,
as shown here. Please keep in mind to
include the weight of the lower deflection
pulley when you calculate the suspended
weight. Pay attention to the correct unit of
measure.
dynamic calibration
fig. 3.6.1a
Weight
Material to
be measured
Guide rollers
Guide rollers
Measuring
rollers
Hang a weight which corresponds to
the tension to be measured from the
measured material, vertically, as shown
here. Pay attention to the correct unit of
measure.
fig. 3.6.1b
Weight
Material to be
measured
Guide rollers
Guide rollers
Measuring
rollers
static calibration
The tension meter has been calibrated dynamically (fig. 3.6.1a) according to the
SCHMIDT factory procedure. Therefore, differences may occur between static and
dynamic readings.

19
To perform the calibration procedure
- Select a new material or edit an existing one (by re-entering the values) from the
„material“ menu.
- Enter a designation (you can use the software supplied with the tension meter
alternatively).
While performing the calibration, the tension meter must be fixed in such a way
that the material to be measured runs smoothly between the guide rollers and the
measuring roller.
The display gives detailed information on the calibration.
3.6.2 Calibration procedure
Calibrations of the tension meter are performed according to the SCHMIDT factory
procedure using weights that correspond to 10 %, 50 %, and 90 % of the measuring ran-
ge. In 95 % of all industrial applications, the SCHMIDT calibration has been proven
to provide the best results. In particular, it is suitable for comparative purposes.
If the material to be measured differs significantly from the SCHMIDT calibration material
in material type, diameter, rigidity, shape, etc., we recommend to perform a calibration
using customer-supplied material. In addition to the factory-preset material, you can save
up to 3 additional materials.
Calibration Units and Calibration Points
- The device can be calibrated in centinewton (cN) or gram (g). Although the unit of the
calibration weights has to correspond with the unit choosen in the menu „calibration“
- For the calibration of the tension meter, three calibration weights are used. For
example, if you select 10 %, 40 %, 70 % for the weights for the static calibration must
correspond to 10 %, 40 % and 70 %, for the dynamic calibration 20 %, 80 % und
140 % of the measuring range.
In this example, you need the following weights for the ETX-100:
Static calibration in Newton: 10 cN, 40 cN, and 70 cN
Static calibration in Gram: 10 g, 40 g, and 70 g
Dynamic calibration in Newton: 20 cN, 80 cN, and 140 cN
Dynamic calibration in Gram: 20 g, 80 g, and 140 g
The measured values are displayed in the unit set in the „Settings“ menu, inde-
pendent from the unit that was used to calibrate the material characteristic.
So that they are available when you verify the calibration later or repeat the
calibration after a factory reset.
Material to be
measured Unit Calibration points
Yarn cN 5 %, 50 %, 90 %
e. g.

20
Step 1:
Set the calibration points and weights, e.g. in Newton using the calibration
points 10 %, 40 %, and 70 % of full scale
Start: Select the Start menu item.
Alternative calibration points: 5 %, 45 %, 90 % 10 %, 50 %, 90 %
5 %, 50 %, 90 % 10 %, 40 %, 70 %
10 %, 45 %, 90 %
We recommend to use the 10 %, 50 %, 90 % setting for an initial calibra-
tion. If the measured values are not accurate enough when you check the
calibration, repeat the calibration using other calibration points.
We recommend that you align the middle of the tension range to be
measured with the middle calibration point.
In the „Material“ menu, select Calibration.
3.6.2 Calibration procedure
Step 2:
Perform a zero adjustment with the tension meter in its measuring position
Step 3:
Calibrate calibration point 1
Insert material to be measured
Step 4:
Calibrate calibration point 2
Step 5:
Calibrate calibration point 3
Once you have completed the calibration, make sure to verify it as described
in chapter 3.6.3. In case of a large deviation, repeat the calibration or select
different calibration points.