HBM C18 Manual de usuario

A0887-1.1 en

Force Transducer

C18

Mounting Instructions

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.

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.

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.

C18

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

10 C18

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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