HBM TB2 User manual

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 Lemoplug, 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.

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6. Use adaptation flanges with sufficiently large through‐holes to avoid lock
ing the screws.
4.2 Installation position
The torque reference transducer can be mounted in any position. In combina
tion with HBM amplifiers, a positive output signal will be produced with a
clockwise torque.
4.3 Conditions on site
The torque reference transducer TB2 is protected to IP54 according to EN
60529. A transducer with degree of protection IP67 per EN 60529 is optionally
available. The transducers must be protected against coarse dirt particles,
dust, oil, solvents and humidity.
During operation, the prevailing safety regulations for the security of person
nel must be observed.
4.4 Mechanical installation
NOTE
Handle the torque reference transducer carefully! The transducer can
suffer permanent damage from mechanical shock (dropping), chemical
effects (e.g. acids, solvents) or thermal effects (hot air, steam).
Do not load cable connection with large side forces.
When installing the reference torque transducer as the comparison standard
in calibration test benches, the torque to be measured must be applied from
the measuring side (see Fig. 4.2).

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Measuring side B
A
Fig. 4.2: Measuring side of the TB2
Mounting sequence:
1. The protective film must be removed before the external centering is
mounted.
2. Use clean, flat (axial run‐out tolerance 0.01 mm) and ground (as far as is
possible) flange surfaces (Ra< 0.8) (minimum material yield point
> 900 N/mm2;Hardness > 30 HRC).
3. Prior to installation, clean the torque transducer flange and counterflange
plane surfaces. For safe torque transfer, the surfaces must be clean and
free from grease. Use a piece of cloth or paper soaked in solvent. Make
sure that no solvent drips into the inside of the transducer when cleaning.
4. For the bolted measuring body connection, use eight DIN EN ISO 4762
property class 10.9 or 12.9 hexagon socket screws of a suitable length
(dependent on the connection geometry, black, oiled, mtot=0.125, see
Table 4.1).
WARNING
With alternating loads: Cement all connection screws into the mating
thread with a screw locking device (medium strength) to exclude pre
stressing loss due to screw slackening.
5. The adapter material should have a yield point of minimum 900 N/mm2for
tapped threads.

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Fig. 4.3: Bolted connection of measuring body
6. Fasten all screws with the specified torque (Table 4.1).
7. For further mounting of the shaft train, there are eight tapped holes on the
connection flange. Also use screws of property class 10.9 (or 12.9) and
fasten with the torque specified in Table 4.1.
ATTENTION
With alternating loads, use a screw locking device to cement the con
necting screws into place! Guard against contamination from varnish
fragments.
Nominal (rated) torque
(NVm)
Fastening screws
(Z)1)
Fastening bolts
Property class
Prescribed
tightening torque
(NVm)
100 M8
10.9
34
200 M8 34
500 M10 67
1k M10 67
2k M12 115
3k M12 135
5k M14 12.9 220
10k M16 340
Table 4.1: Fastening screws
1) DIN EN ISO 4762; black/oiled/mtot = 0.125

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Installation as transfer transducer
Transfer transducers must be as insensitive as possible against all installation
influences. This can be achieved in construction through, for example, spe
cially designed adaptation flanges. This means that deviating adaptation con
ditions, compared to the original calibration at the manufacturer, can be mini
mized.
The following points must be noted in addition to the previously mentioned
recommendations for reference transducer, in order to ensure optimal transfer
of sensitivity:
•Apply the torque from inside (DI) to outside (DA) in the torque transducer,
the ratio should be DI
DAv0.6.
•The width of the adaptation flange (B) on the reaction side should be 1.5 to
2 times the flange screw diameter.
•The adaptation flange should not be weakened by additional holes in the
area of the torque application surfaces.
DIDA
TB2 measuring side
Adaptation flange
B
Fig. 4.4: Adaptation flange transfer transducer
For optimal transfer measurement results, please use:
•225 Hz amplifier
•Extension with six‐wire circuit
4.5 Loading capacity
The torque reference transducers are suitable for measuring static and dy
namic torques.

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Please note, when measuring dynamic torques:
•The calibration performed for static torques is also valid for dynamic torque
measurements.
•The natural frequency f0for the mechanical measuring system depends on
the moments of inertia J1and J2of the connected rotating masses and the
TB2's torsional stiffness.
Use the equation below to approximately determine the natural frequency f0of
the mechanical measuring arrangement:
f0+1
2p· c
T·ǒ1
J1
)1
J2Ǔ
Ǹf0= natural frequency in Hz
J1, J2= mass moment of inertia in kg⋅m2
cT= torsional stiffness in N⋅m/rad
•The oscillation width (peak‐to‐peak) can be max. 200 % (for nominal (rated)
torques 3 to 10 kN⋅m=160 %) of the nominal (rated) torque designated for
the TB2, even under alternating load. The oscillation width must fall within
the loading range specified by -MNand +MN.
ATTENTION
The mechanical limit values must be complied with even in a resonance
situation. The torsional spring stiffness and inertia torque for estimating
the natural frequency can be found in Chap. 9.
+MN100 %
-MN100 %
0
90
70
Nominal (rated) torque MNin %
200 % (160 %) MN
Oscillation width
Fig. 4.5: Permissible dynamic loading

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5 Electrical connection
The torque reference transducer is supplied with a ready‐made 6‐wire trans
ducer connection cable with free ends. A plug can be attached on request
(see Chap. LEERER MERKER).
Extension cables should be shielded and low capacitance. HBM provides spe
cific cables for this purpose, the 1‐KAB0304A‐10 (ready‐made) and the
KAB8/00‐2/2/2 (by the meter, can also be supplied with mounted device con
necting plugs).
The pin assignment can be found in the following table:
Connecting to an amplifier with
Connection PIN Wire color 15‐pin
SUB‐D connector
Plug MS3106
PEMV
Measurement signal (+UA) 6 wh (white) 8 A
Bridge excitation voltage (-UB) 1 bk (black) 5 B
Bridge excitation voltage (+UB) 5 bu (blue) 6 C
Measurement signal (-UA) 3 rd (red) 15 D
Sense lead (-) 2gy (gray) 12 G
Sense lead (+) 4gn (green) 13 F
Shielding connected to enclo
sure ground
Table 5.1 Pin assignment
For pin assignments of amplifiers with solder or clamped connections, please
refer to the documentation of the applicable amplifier.
1
6
5
43
2
Top view (from outside)
Fig. 5.1: PIN assignment Lemoplug

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5.1 General information
To make the electrical connection between the torque transducer and the am
plifier, we recommend using shielded, low‐capacitance measurement cables
from HBM.
With cable extensions, make sure that there is a proper connection with mini
mum contact resistance and good insulation. All plug connections or swivel
nuts nuts must be fully tightened.
Do not route the measurement cables parallel to power lines and control cir
cuits. If this cannot be avoided (in cable pits, for example), maintain a mini
mum distance of 50 cm and also draw the measurement cable into a steel
tube.
Avoid transformers, motors, contactors, thyristor controls and similar stray‐
field sources.
ATTENTION
Transducer connection cables from HBM with plugs attached are identi
fied in accordance with their intended purpose (Md or n). When cables
are shortened, inserted into cable ducts or installed in control cabinets,
this identification can get lost or become concealed. If this is the case, it
is essential for the cables to be re‐labeled!
5.2 Notes on cabling
Electrical and magnetic fields often induce interference voltages in the mea
suring circuit. These interferences arise primarily from power lines lying in par
allel to the measuring leads, but also from contactors or electric motors in the
vicinity. In addition, interference voltages can be induced galvanically, espe
cially through the grounding of the measurement chain at several points.
Please follow the instructions below:
•Use shielded, low‐capacitance HBM cables only.
•Do not route measurement cables parallel to power lines or control circuits.
If this is not possible (in cable pits, for example), protect the measurement
cable with a rigid steel conduit, for example, and keep it at least 50 cm
away from the other cables. The power lines or control circuits should be
twisted (15 twists per meter).
•Avoid stray fields from transformers, motors and contact switches.

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•Do not ground the transducer, amplifier and indicator more than once. All
the devices in the measurement chain must be connected to the same
grounded conductor.
•The connection cable shielding is connected to the transducer housing.
•Connection diagram, grounding concept (Greenline).
Grounding concept (Greenline)
The cable shield is connected in accordance with the Greenline concept. This
encloses the measurement system in a Faraday cage. Any electromagnetic
interference active here does not affect the measurement signal.
In the case of interference due to differences in potential (compensating cur
rents), the connection between operating voltage zero and the housing ground
must be separated at the amplifier and a potential equalization line estab
lished between the housing and the amplifier housing (highly flexible stranded
wire, 10 mm2wire cross‐section).
6 Maintenance
The TB2 reference torque transducers are maintenance‐free.
7 Option
•Degree of protection IP67 per EN 60529
8 Accessories
To be ordered separately:
•Connection plug MS 3106 PEMV, mounted on cable
•15‐pin D‐plug, mounted on cable
•In combination with DKD calibration certificate, Class 0.05 as per DIN
51309 or EA 10/14

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9 Specifications
Type TB2
Accuracy class 0.03
Nominal (rated) torque Mnom N⋅m 100 200 500
kN⋅m 1 2 3 5 10
Nominal (rated) sensitivity (spread between
torque = zero and nominal (rated) torque) mV/V 1
Sensitivity tolerance (deviation of the actual
output quantity at Mnom from the nominal
(rated) sensitivity) %<"0.1
Temperature effect per 10 K in the nominal
(rated) temperature range
on the output signal, related to the actual
value %<"0.03
on the zero signal, related to the nominal
(rated) sensitivity %<"0.02
Linearity error including hysteresis, related
to the nominal (rated) sensitivity
Relative standard deviation of repeatability
per DIN 1319, related to the variation of the
output signal
%
%
<"0.03
<"0.01
Input resistance at reference temperature
Output resistance at reference temperature
Reference excitation voltage
Operating range of excitation voltage
Ω
Ω
V
V
1550"100
900 …1500
5
2.5 …12
Emission as per (EN61326‐1, Table 4)
RFI field strength Class B
Interference immunity (EN61326‐1, Table A.1)
Electromagnetic field (AM)
Magnetic field
Electrostatic discharge (ESD)
V/m
A/m
10
100
Contact discharge kV 4
Air discharge kV 8
Burst (rapid transients) kV 2
Surge (impulse voltages) kV 1
Cable based interferences V 10
Degree of protection per EN 60,529 -IP54, optional IP67
Nominal (rated) temperature range °C +10 …+60
Operating temperature range °C -10 …+80
Storage temperature range °C -50 …+85

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Type TB2
Nominal (rated) torque Mnom N⋅m 100 200 500
kN⋅m 1 2 3 5 10
Mechanical shock, test
severity level per DIN IEC 68;
Part 227; IEC 682271987
Number n 1000
Duration ms 3
Acceleration (half sine) m/s2650
Vibrational stress
Test severity level according
to DIN IEC 68; Part 227; IEC
68261982
Frequency range Hz 5 ... 65
Duration h 1.5
Acceleration (amplitude) m/s250
Load limits1)
Limit torque
related to Mnom % 200 160
Breaking torque
related to Mnom % >400 >320
Longitudinal limit force kN 5 10 16 19 39 42 80 120
Lateral limit force kN 1 2 4 5 9 10 12 18
Limit bending moment N⋅m 50 100 200 220 560 600 800 1200
Oscillation width per DIN
50100 (peak‐to‐peak) N⋅m 200 400 1000 2000 4000 4800 8000 16000
1) Each type of irregular stress (bending moment, lateral or longitudinal force, exceeding nominal (rated) torque) can only be permitted
up to its specified static load limit, provided none of the others can occur at the same time. If this condition is not met, the limit values
must be reduced. If 30% of the bending limit moment and lateral limit force occur at the same time, only 40% of the longitudinal limit
force is permissible and the nominal (rated) torque must not be exceeded. The permissible bending moments, longitudinal forces
and lateral forces can affect the measurement result by approx. 0.2% of the nominal (rated) torque.