Schmidt MK-12 User manual

Tension Meter
MK Series
Model MK
Edition MK 05.3.E
Instruction Manual
Valid as of: 01.06.2007 • 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

2
Contents
1 Warranty and Liability .............................................................................................. 3
1.1 Notices within the Operating Instructions............................................................... 3
1.2 Responsibilities of the Operating Company ........................................................... 3
1.3 Responsibilities of the Personnel ........................................................................... 3
1.4 Informal Safety Measures ...................................................................................... 4
1.5 Training of the Personnel ....................................................................................... 4
1.6 Intended Use.......................................................................................................... 4
1.7 Dangers in Handling the Device............................................................................. 4
1.8 Copyright................................................................................................................ 4
1.9 Declaration of Conformity....................................................................................... 4
2 Available Models....................................................................................................... 5
2.1 Specifications ......................................................................................................... 5
2.2 Available OptionsAir damping ................................................................................ 6
2.3 Items Supplied ....................................................................................................... 6
2.4 Unpacking .............................................................................................................. 6
3 Operation................................................................................................................... 6
3.1 Notes Before Starting Measurement...................................................................... 6
3.2 Fastening the MK Tensionmeter ............................................................................ 7
3.3 Inserting the Material to be Measured.................................................................... 7
3.4 Air Damping(Optional Accessory Code A) ............................................................. 7
3.5 MIN/MAX Contacts (Optional Accessory Code D) ................................................. 8
3.6 Verification of the MK calibration............................................................................ 9
4 Service and Maintenance....................................................................................... 10
4.1 Rollers .................................................................................................................. 10
5 Cleaning................................................................................................................... 10
6 Verification Intervals .............................................................................................. 10
7 Correspondence ..................................................................................................... 11
8 Repairs..................................................................................................................... 11

3
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.
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
resulting 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

4
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 Operating Instructions must always be kept on hand where the device is operated.
Apart from the Operating Instructions, the general and local valid regulations on accident
prevention and environmental protection must be provided and complied with.
1.4 Informal Safety Measures
1.6 Intended Use
1.7 Dangers in Handling the Device
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.
1.8 Copyright
1.9 Declaration of Conformity
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.
Our mechanical tension meters do not belong to the EC machinery directive 2006/42/EC
and do not have a CE mark.
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.
The device must not be operated in potentiallexplosive areas
and must not come into contact with aggressive substances.

5
2 Available Models
** 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
2.1 Specifications
Calibration: According to SCHMIDT factory procedure
Accuracy: ± 1% full scale (FS) or ± 1 graduation on scale
Scale diameter: 43 mm
Temperature range: 10 - 45°C
Air humidity: 85% RH, max.
Housing material: Plastic (Makrolon)
Housing dimensions: 96 mm x 44 mm x 23 mm (L x W x H)
Weight,net (gross): approx. 80 g (200 g)
The standard instruments can have the following modifications or changes:
- Deviating measuring ranges
- Material of the rollers.
- Adjustment to other materials.
The Operating Instructions can also be used for these instruments as their
handling is the same.
Guide rollers:
V-grooved Line Speed
max. m/min Roller Material
Standard 1000 Hardcoated Aluminium
Code T1000 Plastic (POM) black
Code W1000 Nickel plated steel
Model
Measuring
Range
cN
**SCHMIDT Calibration
Material
MK-12 3 - 12 Filament: 25 tex
MK-12 5 - 20 Filament: 25 tex
MK-12 5 - 30 Filament: 25 tex
MK-12 10 - 50 PA: 0.12 mm Ø
MK-12 10 - 100 PA: 0.12 mm Ø
MK-12 20 - 250 PA: 0.12 mm Ø
MK-12 20 - 300 PA: 0.20 mm Ø
MK-12 50 - 400 PA: 0.20 mm Ø

6
2.3 Items Supplied
Measuring instrument
1 Operating Instructions
2.4 Unpacking
Unpack the instrument and inspect it for any shipping damage. Notices of defect must be
announced in writing immediately, at the latest within 7 days on receipt of the goods.
2.2 Available OptionsAir damping
(Option up MK-100)
We recommend application of the
dashpot in the case of high tension
fluctuations. (Spooling or winding
machines)
Code D:
Tension-detecting contacts
We recommend application of the ten-
sion-detecting screw contacts in the case
of automated production sequences.
3 Operation
3.1 Notes Before Starting Measurement
Have you read and understood the Operating Instructions - in particular
Chapter 1, “Basic Safety Notices”? You must not operate the device before.
Before working with the device you must put on your personal protective
equipment, if necessary. For example, eye protectors, gloves, etc.
To avoid damage, do not move the center roller by hand.
Tensions that exceed the measuring range of the device by more than 100%
may cause a permanent deformation of the measuring spring and must be
avoided under any circumstances.
The ID plate with the serial number as well as the calibration label (optional) are
provided on the bottom of the instrument, the SCHMIDT Quality Seal are provided
on the surface.

7
3.2 Fastening the MK Tensionmeter
Two mounting holes are provided for fastening
the tensionmeter on site.
For the mounting hole dimensions see
the above drawing (fig. 3.2).
3.3 Inserting the Material to be Measured
- Thread the material to be measured
carefully through the MEASURING ROLLER
and ROLLER GUIDES, as shown in fig. 3.3.
It is important to ensure that the MEASURED
MATERIAL runs smoothly through the ROLLER
GUIDES and the MEASURING ROLLER.
To avoid damage do not move the
center roller by hand using force.
You can now read the measured tension on the SCALE.
Mounting hole
diameter 3.1 mm
30 mm
46 mm
fig. 3.2
MEASURING
ROLLER
GUIDE ROLLERS MEASURING
MATERIAL
SCALA
fig. 3.3

8
3.4 MIN/MAX Contacts (Optional Accessory Code D)
MIN SETSCREW MAX SETSCREW
LOCKNUTS
max. 24 V / 2 W
fig. 3.4
Soldering
tag for
cable
connection
Soldering tag
for cable
connection
Your MK tensionmeter can be factory-equipped with MIN/MAX tension-detecting
contacts which allow you to monitor the tolerance limits for the measured tension.
These factory-installed contacts are free from potential. Instead of the lamps shown in
the illustration it is of course also possible to connect other equipment, such as bell,
horn, relay, etc.
The contact load specified in fig. 3.4 of max. 24 V / 2 W must not be exceeded.
The setting of the desired tolerance range has to be tuned to the local conditions by
experimenting.
To set the MINIMUM tolerance limit:
- Loosen the LOCKNUT on the MIN-SETSCREW.
Turn the SETSCREW clockwise
= to decrase the MINIMUM-tolerance
Turn the SETSCREW counterclockwise
= to incrase the MINIMUM-tolerance
- Fasten the LOCKNUT on the MIN-SETSCREW
To set the MAXIMUM tolerance limit:
- Loosen the LOCKNUT on the MAX-SETSCREW.
Turn the SETSCREW clockwise
= to decrase the MAXMUM-tolerance
Turn the SETSCREW counterclockwise
= to incrase the MAXMUM-tolerance
- Fasten the LOCKNUT on the MAX-SETSCREW

9
3.5 Verification of the MK calibration
Checking procedure:
- Suspend a known WEIGHT that corresponds to the tension to be measured (pay
attention to the correct unit of measure) from the PROCESS MATERIAL, vertically, as
shown in fig. 3.5. (Always use a fresh portion of the material to be measured).
- Before the final check, move the PROCESS MATERIAL slowly up and down to
compensate any friction caused by the instrument and thus ensure the repeatability.
- The tension value should be equal to the value of the suspended WEIGHT.
If this procedure shows a deviation beyond the allowable tolerance and a reliable
operation is no longer allowed, the instrument has to be recalibrated or repaired.
For recalibration, return the tension meter to the factory.
All tension meters are calibrated with standard materials - such as polyamide
monofilament (PA) - according the SCHMIDT factory procedure.
The filament sizes are noted in Chapter 2.
Any difference in process material size and rigidity from the standard material may
cause a deviation of the accuracy.
In 95 % of all industrial applications the SCHMIDT calibration has been proven to
provide the best results and is used for comparative purposes.
If the process material differs significant in size, rigidity and shape we recommend
special calibration using customer`s sample. For this purpose a material sample of 5 m
should be supplied.
GUIDE ROLLERS
WEIGHT
MEASURING ROLLER
PROCESS MATERIAL
SCALE
fig. 3.5
GUIDE ROLLERS

10
4.1 Rollers
4 Service and Maintenance
The tension meter is easy to maintain. Depending on operating time and load, the ten-
sion meter should be checked according to the locally valid regulations and conditions (as
described in Chapter 3.5). The use of other test methods than the procedure described in
Chapter 3.5 may cause deviating measuring results.
5 Cleaning
For cleaning the unit, do not use any
AGGRESSIVE SOLVENTS
such as trichloroethylene or similar chemicals.
NO WARRANTY OR LIABILITY
shall be accepted for damage resulting from improper cleaning.
You should regularly inspect the rollers to assure that they are running easily and
smoothly. You can replace the rollers yourself, as necessary. When ordering spare
rollers, please indicate the tension meter model and the serial number (on the rear
side of the tension meter).
e. g.:
Ordering of spare rollers
Model: MK-12 (on the rigth side of the tension meter)
Serial number: 300 - 888888 (on the rigth side of the tension meter)
Standard rollers: Order number R530013
The question of finding the right frequency of calibration accuracy verification depends
on several different factors:
Operating time and load of the SCHMIDT tension meter
Tolerance band defined by the customer
Changes of the tolerance band compared to previous verifications of calibration
Therefore, the interval between verifications must be determined by the user`s
Quality Assurance Department based on the user`s experience.
Assuming normal operating time and load as well as careful handling of the tension
meter, we recommend a verification interval of 1 year.
6 Verification Intervals

11
Should you have any questions regarding the instrument or Operating Instructions, or their
use, please indicate above all the following details which are given on the ID plate:
1) The tension meter model
2) The serial number
7 Correspondence
To avoid unnecessary follow-up questions, and the resulting loss of time or pos-
sible misunderstandings, please return the tension meter with a detailed fault
description to our service department. Please indicate in your order whether you
require an Inspection Certificate 3.1 according to DIN EN 10204.
8 Repairs
HANS SCHMIDT & Co GmbH
Schichtstr. 16
D-84478 Waldkraiburg
Germany
Service address:
Shipping instructions:
We kindly ask for return free of charge for us, if possible by airmail parcel. All occurring
charges, if any (such as freight, customs clearance, duty etc.), will be billed to customer.
For return from foreign countries, we ask you to include a proforma invoice with a low value
for customs clearance only, e.g. 50 Euro, each and to advise the shipment in advance by
fax or eMail.

SCHMIDT-Test-Instruments
indispensable in production monitoring,
quality control and automation
We solve your measuring problems:
Tension Meter
Force Gauge
Torque Meter
Tachometer
Speed- and Lengthmeter
Electronic Lengthmeter
Stroboscope
Screen Printing Tension Meter
Thickness Gauge
Yarn Package Durometer and Shore-A Durometer
Sample Cutter
Balance
Moisture Meter
Leak Tester
Softometer
Mailing address:
P. O. B. 1154
84464 Waldkraiburg Germany
Shipping address:
Schichtstr. 16
84478 Waldkraiburg Germany
Hans Schmidt & Co GmbH
Phone:
int. + 49 / (0)8638 / 9410-0
Fax:
int. + 49 / (0)8638 / 4825
int. + 49 / (0)8638 / 67898
More than 70 years - Worldwide -
e-mail:
[email protected]
Internet:
http://www.hans-schmidt.com
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