HBM TB2 Manuel utilisateur

A0884‐5.0 en/de

Torque reference

transducer

Drehmoment‐

Referenzaufnehmer

TB2

Mounting Instructions

Montageanleitung

English Page 3 - 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deutsch Seite 27 - 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TB2

A0884-5.0 en/de HBM

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TB2

A0884-5.0 en/deHBM

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.

TB2

A0884-5.0 en/de HBM

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).

TB2

A0884-5.0 en/deHBM

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.

TB2

A0884-5.0 en/de HBM

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 Lemoplug, free ends)

TB2

A0884-5.0 en/deHBM

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.

TB2

A0884-5.0 en/de HBM

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.

TB2

A0884-5.0 en/deHBM

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.

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