HBM C18 Manual de usuario
A0887-1.1 en
Force Transducer
C18
Mounting Instructions
3
C18
HBMA0887-1.1 en
Contents Page
Safety instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Scope of supply 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Application information 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Structure and mode of operation 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Measuring body 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Base and thrust piece 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Disturbances 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Conditions on site 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Ambient temperature 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Moisture 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Air pressure 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Mechanical installation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Important measures for installation 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 General installation guidelines 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Installing the transducer 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Electrical connection 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Instructions for cabling 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Wiring pin assignment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Specifications 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Dimensions C18 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Declaration of conformity 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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HBM A0887-1.1 en
Safety instructions
Use in accordance with the regulations
Force transducers of type C18 are to be used for precise force
measurements. 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
intended. Proper and safe operation of this transducer requires proper
transportation, correct storage, assembly and mounting and careful operation
and maintenance.
General dangers of failing to follow the safety instructions
C18 force transducers comply with the state of the art and are fail-safe. The
transducers can give rise to remaining 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
Instructions and in particular the technical safety instructions.
Remaining 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 minimize remaining dangers. Prevailing regulations must be complied with
at all times. There must be reference to the remaining dangers connected with
force measurement technique.
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C18
HBMA0887-1.1 en
In these mounting instructions remaining dangers are pointed out using the
following symbols:
Symbol: DANGER
Meaning: Highest level of danger
Warns of a directly dangerous situation in which failure to comply with safety
requirements will lead to death or serious physical injury.
Symbol: WARNING
Meaning: Possibly 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 indicating application notes and useful information:
Symbol: NOTE
Means that important information about the product or its handling is being
given.
Symbol:
Meaning: CE mark
The CE mark is the manufacturer’s guarantee that his product meets the
requirements of the relevant EC directives (see Declaration of Conformity at
the end of this document).
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HBM A0887-1.1 en
Prohibition of own 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 liability on our part for any resultant loss or damage.
Qualified personnel
These transducers are only to be installed by qualified personnel strictly in
accordance with the specifications 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 C18 force transducer is maintenance free.
Accident prevention
Although the specified nominal (rated) 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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C18
HBMA0887-1.1 en
1 Scope of supply
•C18 measuring body
•Thrust piece
•Base
•Test report
•Operating Manual C18
Accessories (not included in the scope of supply)
•DKD calibration certificate according to EN10002-3, ISO376
Order no. K-CAL-FD...
2 Application information
Force transducers of the C18 type series are suitable for measuring
compressive forces.
Do always install the transducer including base and thrust piece to
avoid faulty measurement.
They measure static and quasi-static forces with great accuracy and
reproducibility 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 force transducers can be used with both DC amplifiers and CF amplifiers
with a maximum carrier frequency of 600 Hz.
C18 force transducer with DKD certificate from HBM:
Additional force calibration according to EN 10002-3 or ISO376, guarantees a
transducer rating to class 0.5.
For a DKD calibration, we recommend to calibrate the complete measuring
chain including the transducer and the connected amplifier to ensure optimum
accuracy.
The limits for the permissible mechanical, thermal and electrical stresses are
stated in the Specifications. It is essential that these are taken into
consideration in planning the measuring set-up, during installation and finally,
during operation.
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HBM A0887-1.1 en
3 Structure and mode of operation
3.1 Measuring body
The measuring body comprises a measuring beam system made of
rust-resistant steel with strain gages (ring torsion principle).
3.2 Base and thrust piece
The base is made from stainless steel for nominal (rated) forces from 10 kN to
500 kN and from hardened tempering steel for nominal (rated) forces from
1 MN to 4.5 MN. They must be oiled to protect them from corrosion. All thrust
pieces are made of stainless steel.
3.3 Disturbances
Torsion, bending, and lateral loads are disturbances and must be avoided.
The temperature effects on the zero signal (SG bridge and housing) and on
the sensitivity are compensated.
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HBMA0887-1.1 en
4 Conditions on site
4.1 Ambient temperature
The effects of temperature on the zero signal and on the sensitivity are
compensated. To achieve optimal measurement results the nominal (rated)
temperature range must be maintained. Temperature-induced measurement
errors can be caused by heating (for example radiant heat) or cooling on one
side. A radiation shield and all-round heat insulation bring about marked
improvements. They must not form a force shunt.
4.2 Moisture
Externed humidity and tropical climatic do not affect the transducer‘s function.
4.3 Air pressure
Barometric variations have similar effects on the force transducer as force va-
riations. Please take into account that barometric variations result in zero off-
set.
Nominal (rated) load kN 10 20 50 u 50
Zero effect at a barometric variation of 10mbar
(related to the nom. (rated) load) % 0.01 0.005 0.002 t0.001
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HBM A0887-1.1 en
5 Mechanical installation
5.1 Important measures for installation
−treat the transducer gently
−when measuring, make sure that the support structure is rigid
−the force-introduction surfaces must be scrupulously clean and carry in full
−do not overload 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 measurement direction in which forces act on the transducer must be as
precise as possible.
WARNING
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.
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