Schmidt DX Series Manual de usuario
Tension Meter
DX Series
Model DXH
Edition DXH 01.E
Instruction Manual
Valid as of: 01.02.2013 • 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 instruction manual..................................................................... 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 Delivery includes .................................................................................................... 5
2.3 Unpacking .............................................................................................................. 5
3 Measuring.................................................................................................................. 6
3.1 Notices before starting measurement .................................................................... 6
3.1.1 Mounting the special finger support (on the rear side of the tension meter) .. 6
3.2 Operating elements of the tension meter ............................................................... 7
3.3 Measuring with the tension meter .......................................................................... 8
3.4 Verification of the DXH calibration ......................................................................... 9
4 Service and maintenance....................................................................................... 10
5 Cleaning................................................................................................................... 10
6 Verification intervals .............................................................................................. 10
6.1 Verification of calibration and determination of repair costs................................. 11
7 Correspondence ..................................................................................................... 12
8 Repairs..................................................................................................................... 12
3
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 instruction manual 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 De-
livery.” 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 instruction manual 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 instruction manual
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 instruction manual contains the most important notices for the safe operation of the
device.
These instruction manual, 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 preven-
tion of accidents must be complied with.
The representations within the instruction manual 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
instruction manual and have confirmed this with their signatures.
- are examined regularly on their safe and conscientious working method.
4
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.
1.4 Informal safety measures
The instruction manual must always be kept on hand where the device is operated.
Apart from the instruction manual, the generally and locally valid regulations on accident
prevention and environmental protection must be provided and complied with.
1.6 Intended use
The device is intended exclusively to be used as a tension meter for non-moving, preten-
sioned ropes.
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 result-
ing from misuse.
The intended use also includes:
- Complying with all notices included in the instruction manual and observing all
inspection and maintenance works.
1.8 Copyright
The copyright on these instruction manual remains with the company
Hans Schmidt & Co GmbH.
These instruction manual is intended for the operating company and its personnel only.
They contain instructions and notices that may only be reproduced on the prior written
permission of
Hans Schmidt & Co GmbH
and under indication of the complete reference data.
Violations will be prosecuted.
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 supervi-
sion of an experienced personnel
1.9 Declaration of conformity
Our mechanical tension meters do not belong to the EU machinery directive 2006/42/EC
and do not have a CE mark.
The device must not be operated in potential explosive areas
and must not come into contact with aggressive substances.
5
* Suitable for 95% of 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 custom-
er material. For this purpose, a material sample of about 5 m should be supplied.
International unit for tension force: 1 cN = 1.02 g = 0.01 N
1 daN = 1.02 kg = 10.0 N
Model
Tension
Range
cN
Measuring
Head Width
mm
*SCHMIDT
Calibration
Material
DXH-5000 400 - 5000 116 PA: 0.80 mm Ø
DXH-10K 2.5 - 10 daN 116 PA: 1.00 mm Ø
DXH-20K-L 5 - 20 daN 216 PA: 1.50 mm Ø
These instruction manual refer to model DXH for mon-moving, pretensioned
ropes of the DX Series.
The model DXH is also available with the
following modifications (customized versions):
- Special tension ranges
- Customized measuring head width for applications with limited access
space
- Customized distance between the two outer hooks to minimize
deflection of the material
- Calibration for material path other than standard (vertical)
- Calibration to different units of measure, such as g or kg
2 Available models
2.1 Specifications
Calibration: According to SCHMIDT factory procedure
Accuracy: ± 1% full scale or ± 1 graduation on scale
Scale diameter: 41 mm
Temperature range: 10 - 45°C
Air humidity: 85% RH, max.
Housing material: Die-cast aluminium
Housing dimensions: 188 mm x 85 mm x 45 mm (L x W x H)
Weight net (gross): DXH-5000 and DXH-10K approx. 470 g (1000 g)
DXH-20K-L approx. 580 g (2000 g)
2.2 Delivery includes
Tension meter
Special finger support
Certificate of Compliance with the order 2.1 under EN 10204
Instruction manual
Carrying case
2.3 Unpacking
Unpack the tension meter and inspect it for any shipping damage.
Notices of defect must be announced immediately, at the latest within 7 days on receipt of
the goods.
6
3 Measuring
3.1 Notices before starting measurement
Have you read and understood the instruction manual, in particular
chapter 1 “Warranty and liability” ?
You are not permitted to operate the device before doing so.
Before working with the device you must put on your personal protective
clothing, if necessary. For example, eye protectors, gloves, etc.
To avoid damage, do not move the measuring pin by hand.
Tensions that exceed the tension range of the instrument by more than
100 % may cause permanent damage to the movement 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 pro-
vided on the surface.
3.1.1 Mounting the special finger support (on the rear side of the tension meter)
Whenever useful and necessary, the tension meter is supplied with a special finger
support. We recommend mounting the finger support when measuring high tensions
to reduce the necessary effort to move the outer hooks with the Thumb piece on the
front of the tension meter and facilitate acquisition of the material to be measured.
(chapter 3.3)
- Place the special finger support in the recess located on the rear side of the tension
meter and fasten it with the finger support screw.
Special finger support
Finger support screw
Thumb piece
fig. 3.1.1
fig. 3.1
SCHMIDT-quality seal
Calibration label
(option)
ID plate with serial number
7
3.2 Operating elements of the tension meter
fig. 3.2b
fig. 3.2a
Thumb piece
Process material
Sample holding clip
measuring pin
V-grooved
Scale Special lever
Code L (Optional Accessory)
Hooks
8
3.3 Measuring with the tension meter
Inserting:
- Push the thumb piece or special lever as far as it will go in the direction of the arrow
to extend the outer hooks.
- Keeping the outer hooks extended, bring the instrument behind or under the filament and
move it so that the hooks contact the process material (see fig. 3.3).
- Slowly release pressure on the thumb piece until the outer hooks return to their
original position.
It is important to assure that the process material lies smoothly between the hooks and
the measuring pin.
The scale pointer will now show the line tension directly.
Removing:
- Push the thumb piece or special lever as far as it will go in the direction of the arrow.
- With the outer hooks extended, move the instrument away from the material.
- Slowly release pressure on the Thumb piece until the outer rollers return to their
original position.
It is essential that the thumb piece return slowly to its initial position.
Any uncontrolled snap-back may affect calibration and may also damage
the instrument.
fig. 3.3
Thumb piece
Hooks
Measuring pin
V-grooved
Process material
Hooks
9
- 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. 3.3
(Always use a fresh portion of the material to be measured).
- Push the thumb piece as far as it will go in the direction indicated by the arrow and
thread the material to be measured between the guide rollers and the measuring roller
Refer to chapter 3.3.
- Slowly release pressure on the thumb piece until the outer rollers return to their
original position.
- 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.
3.4 Verification of the DXH calibration
All tension meters are calibrated with standard materials - such as polyamide monofila-
ment (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.
It is essential that the Thumb piece return slowly to its initial position.
Any uncontrolled snap-back may affect calibration and may also damage
the instrument.
Weight
Hook
Measuring pin, V-grooved
Process material
Scale
fig. 3.4
10
4 Service and maintenance
The tension meter is easy to maintain.
Depending on operating time and load, the tension meter should be checked according
to the locally valid regulations and conditions (as described in chapter 3.4)
Other testing methods as described in chapter 3.4 can cause different measuring readings.
6 Verification intervals
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.
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.
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