HBM TB2 Manuale utente
A0884‐5.0 en/de
Torque reference
transducer
Drehmoment‐
Referenzaufnehmer
TB2
Mounting Instructions
Montageanleitung
English Page 3 - 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deutsch Seite 27 - 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Page
English
Safety instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Scope of delivery 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Application 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Structure and mode of operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Mounting 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 General mounting instructions 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Installation position 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Conditions on site 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Mechanical installation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Loading capacity 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Electrical connection 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 General information 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Notes on cabling 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Maintenance 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Option 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Accessories 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Specifications 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Dimensions 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Safety instructions
Designated use
The reference torque transducer TB2 is designed exclusively for use in torque
measurement tasks and directly associated control and regulating tasks. Use
for any additional purpose shall be deemed to be not as intended.
In the interests of safety, the transducer should only be operated as described
in the Mounting Instructions. It is also essential to observe the appropriate le
gal and safety regulations for the application concerned. The same applies to
the use of accessories.
The transducer is not a safety element within the meaning of its designated
use. Proper and safe operation of this transducer requires proper transporta
tion, correct storage, assembly and mounting, and careful operation.
General dangers of failing to follow the safety instructions
The transducer corresponds to the state of the art and is failsafe. The trans
ducer can give rise to remaining dangers if it is inappropriately installed and
operated by untrained personnel.
Everyone involved with mounting, starting up, maintaining, or repairing the
transducer must have read and understood the Operating Manual and in par
ticular the technical safety instructions.
Residual dangers
The scope of supply and performance of the transducer covers only a small
area of torque measurement technology. In addition, equipment planners, in
stallers and operators should plan, implement and respond to the safety engi
neering considerations of torque measurement technology in such a way as to
minimize remaining dangers. On‐site regulations must be complied with at all
times. Reference must be made to remaining dangers connected with torque
measurement technology.
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The following symbols are used in this Operating Manual to point out remain
ing dangers:
Symbol: DANGER
Meaning: Maximum danger level
Warns of an imminently dangerous situation in which failure to comply with
safety requirements will result in death or serious physical injury.
Symbol: WARNING
Meaning: Dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements can result in death or serious physical injury.
Symbol: CAUTION
Meaning: Possibly dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements could lead to damage to property, slight or moderate
physical injury.
Symbols for application and disposal instructions, as well as useful informa
tion:
Symbol: NOTE
Means that important information about the product or its handling is being
provided.
Symbol:
Meaning: CE mark
The CE mark enables the manufacturer to guarantee that the product com
plies with the requirements of the relevant EC directives (the Declaration of
Conformity can be found at http://www.hbm.com/HBMdoc).
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Symbol:
Meaning: Statutory waste disposal mark
In accordance with national and local environmental protection and material
recovery and recycling regulations, old devices that can no longer be used
must be disposed of separately and not with normal household garbage.
If you need more information about waste disposal, please contact your local
authorities or the dealer from whom you purchased the product.
Conversions and modifications
The transducer must not be modified from the design or safety engineering
point of view except with our express agreement. Any modification shall ex
clude all liability on our part for any damage resulting therefrom.
Qualified personnel
The transducer must only be installed and used by qualified personnel, strictly
in accordance with the specifications and with safety requirements and regu
lations. It is also essential to comply with the legal and safety requirements for
the application concerned during use. The same applies to the use of acces
sories.
Qualified personnel means persons entrusted with siting, mounting, starting
up and operating the product who possess the appropriate qualifications for
their function.
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Accident prevention
According to the prevailing accident prevention regulations, once the trans
ducers have been mounted, a covering agent or cladding has to be fitted as
follows:
•The cover or cladding must not be free to rotate.
•The cover or cladding should prevent squeezing or shearing and provide
protection against parts that might come loose.
•Covers and cladding must be positioned at a suitable distance or be
arranged so that there is no access to any moving parts within.
•Covering agents and cladding must also be attached if the moving parts of
the transducer are installed outside the movement and operating range of
persons.
The only permitted exceptions to the above requirements are if the various
parts and assemblies of the machine are already fully protected by the design
of the machine or by existing safety precautions.
1 Scope of delivery
Included in scope of supply:
•1 Torque reference transducer
•1 Mounting instructions
•1 Manufacturing certificate
•1 PVC cable 3m (6 pin Lemoplug, free ends)
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2 Application
The transducer can measure static and dynamic torques in non‐rotating op
eration. The nominal (rated) torques lie between 100 N⋅m and 10 kN⋅m.
Transfer torque transducer
The main applications are the transfer of torque, e.g. when calibrating refer
ence transducers in test and calibration equipment, and the comparison of ref
erence standards in different calibration laboratories.
A high degree of comparability is important in transfer transducers. Compara
bility is, with regards to transfer of torque, a parameter for different observers,
test conditions, laboratories, installation and time situations. The same instal
lation conditions must be reproduced as in the calibration with reference stan
dard or calibrated with appropriate adapters when transfered.
Reference torque transducer
Reference torque transducers are installed in a calibration device and subse
quently the entire calibration unit is qualified or certified, for instance with a
transfer torque transducer. The exact sensitivity of the transducer is therefore
of secondary importance.
General torque measurements in non‐rotating operation
Due to the high mechanical loading capacity, the permissible oscillation width
of 200 % (160 % at 3 to 10 kN⋅m) of the nominal (rated) torque and the com
pact design, this transducer is also high suitable for applications in test ma
chines for component tests (rotation reversal cycling). A design with degree of
protection IP67 per EN 60529 is optionally available.
3 Structure and mode of operation
The torque reference transducer consists of a measuring body, installed with
strain gages, with a flange‐type torque application. The SG are arranged so
that an optimal torque flow is ensured between the flange and the SG installa
tion point.
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4 Mounting
4.1 General mounting instructions
When the torque reference transducer is installed in a test bench, the test
bench components (frame, couplings, connection flanges, screw connections,
etc.) influence the deformation behavior in the shaft train and therefore also
the measurement characteristics (zero point, sensitivity, reproducibility). The
causes can be:
•Additionally occurring parasitic loads such as radial/axial forces or bending
moments
•Asymmetrical torque application in the transducer
•Stiffness conditions in shaft train deviating from the transducer calibration
These effects of the test bench on the reference transducer can be calibrated
in e.g. with adaptable mass‐lever systems.
Torque transducer
to be calibrated
Locking device
TB2
Torque generation
Calibration test machine with
reference transducer
Fig. 4.1: Example for installation in a calibration test machine
Parasitic loads
Parasitic loads are produced due to tension in the shaft train. They lead to an
additive effect on the zero signal of the torque transducer (see specifications).
If they occur during a torque load, they cause an apparent change in sensitiv
ity.
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Countermeasures:
1. Ensure optimal alignment of shaft train (note alignment data in specifica
tions!).
As long as the permissible limits for bending moment, transverse and lon
gitudinal forces are not exceeded, no special couplings or other measures
are necessary for the installation of the torque reference transducer (the
effects of parasitic limit loads can affect the measurement results by
approx. 0.2% of the nominal (rated) torque).
2. If the necessary alignment accuracy cannot be achieved, use non‐interact
ing couplings.
3. Keep the weight of the shaft sections acting on the torque reference trans
ducer as low as possible.
Depending on the structure of the test bench, decoupling measures with tor
sionally stiff, but pliable torsion bars may be necessary.
Deviating stiffness conditions
If the stiffness conditions in the shaft train (close to the torque transducer)
deviate from the conditions during calibration in the HBM calibration machine,
this will lead to a changed torque application in the torque reference trans
ducer.
Countermeasures:
1. Comply strictly with the specified tightening torques of the fastening
screws.
2. Use high‐strength or hardened adaptation components, particularly in the
vicinity of the transducer torque applications/transfers.
Asymmetric torque distributions
Asymmetric (axially uneven) torque distribution in the shaft train can lead to
deformations which, in turn, cause parasitic loads.
Countermeasures:
1. Use all available screw connections for fastening.
2. Comply strictly with the specified tightening torques of the fastening
screws.
3. Avoid making unnecessary holes in the adaptation flanges.
4. Use clean, flat and ground (as far as is possible) flange surfaces.
5. Avoid torque applications/transfers directly on the outer diameter of the
transducer.
Altri manuali per TB2
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Altri manuali HBM Trasduttore
