HBM U3 Manual de usuario
A2113-2.0 en/de/fr
Force transducer
Kraftaufnehmer
Capteur de force
U3
Mounting Instructions
Montageanleitung
Notice de montage
English Page 3 - 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deutsch Seite 21 - 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Français Page 39 - 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Page
English
Safety instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Scope of supply 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Application information 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Structure and mode of operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Measuring element 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Housing 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Conditions on site 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Ambient temperature 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Moisture 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Deposits 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Mechanical installation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Important measures for installation 10. . . . . . . . . . . . . . . . . . . . . . . . .
5.2 General installation guidelines 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Installation for tensile loading/compressive loading 12. . . . . . . . . . .
5.3.1 Installation without adapter 12. . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Installation with adapter and knuckle eye 13. . . . . . . . . . . . . .
5.3.3 Installation with two knuckle eyes 14. . . . . . . . . . . . . . . . . . . .
6 Electrical connection 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Instructions for cabling 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Specifications (VDI/VDE2638) 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Dimensions 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U3
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Safety instructions
Use in accordance with the regulations
Force transducers in the U3 range are designed for force measurements on
test benches/in press‐fit devices/test devices/pressing. Use for any additional
purpose shall be deemed to be not in accordance with the regulations.
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
legal and safety regulations for the application concerned during use. The
same applies to the use of accessories.
The transducer is not a safety element within the meaning of its use as inten
ded. Proper and safe operation of this transducer requires proper transporta
tion, correct storage, assembly and mounting and careful operation and main
tenance.
General dangers due to non‐observance of the safety instructions
The U3 force transducer corresponds to the state of the art and is fail‐safe.
The transducers can give rise to residual dangers if they are inappropriately
installed and operated by untrained personnel.
Everyone involved with the installation, commissioning, maintenance or repair
of a force transducer must have read and understood the Mounting Instruc
tions and in particular the technical safety instructions.
Residual dangers
The scope of supply and performance of the transducer covers only a small
area of force measurement technique. In addition, equipment planners,
installers and operators should plan, implement and respond to the safety
engineering considerations of force measurement technique in such a way as
to minimise residual dangers. Prevailing regulations must be complied with at
all times. There must be reference to the residual dangers connected with
force measurement technique.
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In these mounting instructions residual dangers are pointed out using the
following symbols:
Symbol: WARNING
Meaning: Dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements can lead to 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.
Symbol: NOTE
Refers to the fact that important information is being given about the product
or its use.
Symbol:
Meaning: CE mark
The CE mark signals a guarantee by the manufacturer that his product meets
the requirements of the relevant EC directives (the declaration of conformity is
available at http://www.hbm.com/HBMdoc).
Symbol:
Meaning: Statutory marking requirements for waste disposal
National and local regulations regarding the protection of the environment and
recycling of raw materials require old equipment to be separated from regular
domestic waste for disposal.
For more detailed information on disposal, please contact the local authorities
or the dealer from whom you purchased the product.
U3
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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
exclude all liability on our part for any damage resulting therefrom. Mounting
and removing the adapter in accordance with Chapter 5 excluded.
Qualified personnel
This instrument is only to be installed by qualified personnel strictly in
accordance with the technical data and with the safety rules and regulations
which follow. It is also essential to observe the appropriate legal and safety
regulations for the application concerned. The same applies to the use of
accessories.
Qualified personnel means persons entrusted with the installation, fitting,
commissioning and operation of the product who possess the appropriate
qualifications for their function.
Conditions on site
Protect the transducer from damp and weather influences such as rain, snow,
etc.
Maintenance
The U3 force transducer is maintenance free.
Accident prevention
Although the specified nominal force in the destructive range is several times
the full scale value, the relevant accident prevention regulations from the
trade associations must be taken into consideration.
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1 Scope of supply
•1 U3 force transducer
•1 U3 Operating Manual
Accessories (not included in the scope of supply):
•'complete adapter' for knuckle eye mounting
0.5-10 kN: Adapter with four M5x12 and four M5x16 screws
Order no. 2-9289.1956
20 kN: Adapter with four M10x25 and four M10x30 screws
Order no. 2-9289.1957
50 kN: Adapter with eight M10x25 and eight M10x30 screws
Order no. 2-9289.1958
100 kN: Adapter with eight M10x25 and eight M10x30 screws each
Property class 12.9. galvanized Order no. 2-9289.2280
•Knuckle eye ZGUW for 0.5-10 kNOrder no. 1-U2A/1 t/ZGUW
20 kN Order no. 1-U2A/2 t/ZGUW
50 kN Order no. 1-U2A/5 t/ZGUW
100 kN Order no. 1-Z4/100 kN/ZGUW
2 Application information
Force transducers of the U3 type series are suitable for measuring tensile and
compressive forces. They measure static and dynamic forces extremely
accurately and therefore require careful handling. You must take particular
care when transporting and installing the devices. If you knock or drop the
transducers, this could permanently damage them.
The housing provides an elaborate seal to protect the sensitive strain gauge
applications and it is essential that this is preserved. You must be particularly
careful with the base of the housing, as this is extremely thin.
The limits for the permissible mechanical thermal and electrical stresses are
stated in the Specifications. It is essential that these are taken into considera
tion in planning the measuring set‐up, during installation and finally, during
operation.
U3
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A2113-2.0 en/de/frHBM
3 Structure and mode of operation
3.1 Measuring element
The measuring element is a measuring spring made from stainless steel, to
which strain gauges (S/G) are applied. The S/Gs are arranged so that four of
them can be strained and the other four compressed when the transducer
reacts to a force.
3.2 Housing
The housing with the integrated measuring spring is completed underneath by
an attached base. This base is extremely thin and must not be loaded
centrally (see Page 11). It should be protected against mechanical damage.
Pressure compensation hole
Fig. 3.1 Position of housing base
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4 Conditions on site
4.1 Ambient temperature
The effects of temperature on the zero signal and on the sensitivity are com
pensated. To achieve optimal measurement results the nominal temperature
range must be maintained. Temperature‐induced measurement errors are
caused by heating (e.g. radiant heat) or cooling on one side. A radiation bar
rier and all‐round thermal insulation will produce a marked improvement, but
should not form a force shunt.
4.2 Moisture
Extreme humidity or a tropical climate should be avoided if this means that the
classified limit values are exceeded (degree of protection IP65 under DIN
EN 60529).
NOTE:
Moisture must not be allowed to penetrate the free end of the connection
cable or get into the pressure compensation hole.
4.3 Deposits
Dust, dirt and other foreign bodies must not be allowed to accumulate such
that they divert part of the measured force onto the housing and so falsify the
measured value (force shunt).
NOTE:
Foreign bodies must not be allowed to clog the gap beneath the flange
surface.
Pressure compensation hole
U3
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5 Mechanical installation
5.1 Important measures for installation
•Handle the transducer with care.
•Do not overload the transducer.
•Welding currents must not be allowed to flow over the transducer. If there is
a risk that this might happen, you must use a suitable low‐ohm connection
to electrically bypass the transducer. HBM, forexample, provides the highly
flexible EEK ground cable, which can be screwed on, both above and
below the transducer.
WARNING
If there is a risk of breakage through overload on the transducer and
thus a risk to persons, additional safety measures are to be taken.
5.2 General installation guidelines
The direction of measurement in which the forces work should be as much
towards the transducer as possible. Torsion and bending moments, eccentric
loading and transverse forces may result in measurement errors and if the
limit values are exceeded, could destroy the transducer.
The transducer can take up 100 % (80 % at 50 kN, 50 % at 100 kN) of its
nominal force as transverse force by reference to a force introduction point on
the force‐introduction surface (see diagram Fig. 5.1), without losing its
mechanical competence.
Transverse force
Fig. 5.1 Transverse force introduction
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