HBM C9B Manuel utilisateur

A2088‐3.0 en/de/fr

Force transducer

Kraftaufnehmer

Capteurs de force

C9B

Mounting Instructions

Montageanleitung

Notice de montage

English Seite 3 - 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deutsch Page 19 - 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Français Page 35 - 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C9B

A2088-3.0 en/de/fr HBM

Contents Page

English

Safety information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Scope of supply 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General application instructions 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Construction and mode of operation 9. . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Transducer 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 SG cover 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Conditions on site 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Ambient temperature 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Moisture and corrosion protection 10. . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Deposits 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.4 External pressure 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Mechanical installation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Important precautions during installation 12. . . . . . . . . . . . . . . . . . . .

5.2 General installation guidelines 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Installation 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Electrical connection 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Connection with four‐wire configuration 14. . . . . . . . . . . . . . . . . . . . .

6.2 Shortening the cable 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3 Cable extension 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.4 EMC protection 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Specifications (VDI/VDE 2638) 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Dimensions 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C9B

A2088-3.0 en/de/frHBM

Safety information

Designated use

The force transducers in the type series C9B are solely designed for measur

ing static and dynamic compressive forces within the load limits specified by

the technical data for the respective maximum capacities. Any other use is not

the designated use.

To ensure safe operation, the regulations in the assembly and operating in

structions, together with the following safety rules and regulations, and the

data specified in the technical data sheets, must be complied with. It is also

essential to observe the applicable legal and safety regulations for the ap

plication concerned.

The force transducers are not intended for use as safety components. Please

also refer to the section “Additional safety precautions”. Proper and safe op

eration of the force transducer requires proper transportation, correct storage,

siting and mounting, and careful operation.

Loading capacity limits

The data in the technical data sheet must be complied with when using the

force transducer. In particular, the respective maximum loads specified must

never be exceeded. The following limits set out in the technical data sheets

must not be exceeded

•Limit forces

•Lateral limit forces

•Breaking forces

•Permissible dynamic loads

•Temperature limits

•Limits of electrical loading capacity

Please note that when several force transducers are interconnected, the load/

force distribution is not always uniform.

Use as a machine element

The force transducers can be used as machine elements. When used in this

manner, it must be noted that, to favor greater sensitivity, force transducers

cannot be designed with the safety factors usual in mechanical engineering.

Please refer here to the section “Loading capacity limits” and the technical

data.

C9B

A2088-3.0 en/de/fr HBM

Accident prevention

The prevailing accident prevention regulations must be taken into account,

even though the nominal (rated) force values in the destructive range are well

in excess of the full scale value.

Additional safety precautions

The force transducers cannot (as passive transducers) implement any (safety‐

relevant) cutoffs. This requires additional components and constructive mea

sures for which the installer and operator of the plant is responsible.

In cases where a breakage or malfunction of the force transducer would

cause injury to persons or damage to equipment, the user must take appropri

ate additional safety measures that meet at least the requirements of applica

ble safety and accident prevention regulations (e.g. automatic emergency

shutdown, overload protection, catch straps or chains, or other fall protection).

The layout of the electronics conditioning the measurement signal should be

such that measurement signal failure does not cause damage.

General dangers of failing to follow the safety instructions

The force transducers are state‐of‐the‐art and reliable. Transducers can give

rise to remaining dangers if they are incorrectly operated or inappropriately

mounted, installed and operated by untrained personnel. Every person in

volved with siting, starting‐up, operating or repairing a force transducer must

have read and understood the mounting instructions and in particular the

technical safety instructions. The force transducers can be damaged or de

stroyed by non‐designated use of the force transducer or by non‐compliance

with the mounting and operating instructions, these safety instructions or any

other applicable safety regulations (BG safety and accident prevention regula

tions) when using the force transducers. Force transducers can break, partic

ularly in the case of overloading. The breakage of a force transducer can also

cause damage to property or injury to persons in the vicinity of the force trans

ducer.

If force transducers are not used according to their designated use, or if the

safety instructions or specifications in the mounting‐ and operating instruc

tions are ignored, it is also possible that the force transducer may fail or mal

function, with the result that persons or property may be affected (due to the

loads acting on or being monitored by the force transducer).

The scope of supply and performance of the transducer covers only a small

area of force measurement technology, as measurements with (resistive)

strain gage sensors presuppose the use of electronic signal processing. In

addition, equipment planners, installers and operators should plan, implement

and respond to the safety engineering considerations of force measurement

C9B

A2088-3.0 en/de/frHBM

technology in such a way as to minimize residual dangers. Prevailing regula

tions must be complied with at all times.

Markings used in this document

The marking below warns of a potentially dangerous situation in which failure

to comply with safety requirements can result in death or serious physical in

jury.

WARNING

Description of a potentially dangerous situation

Measures to avoid/prevent the danger

The marking below warns of a potentially dangerous situation in which failure

to comply with safety requirements can result in slight or moderate physical

injury.

CAUTION

Description of a potentially dangerous situation

Measures to avoid/prevent the danger

The marking below warns of a situation in which failure to comply with safety

requirements could lead to damage to property.

NOTE

Description of a situation that could lead to damage to property

The marking below draws your attention to important information about the

product or about handling the product.

Important

Important information

The marking below contains application tips or other information that is useful

to you.

C9B

A2088-3.0 en/de/fr HBM

Tip

Information/Application instructions

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.

Maintenance

The C9B force transducer is maintenance‐free.

Disposal

In accordance with national and local environmental protection and material

recovery and recycling regulations, old transducers 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.

Qualified personnel

Qualified personnel means persons entrusted with siting, mounting, starting

up and operating the product, who possess the appropriate qualifications for

their function.

This includes people who meet at least one of the three following require

ments:

- Knowledge of the safety concepts of automation technology is a require

ment and as project personnel, you must be familiar with these concepts.

- As automation plant operating personnel, you have been instructed how to

handle the machinery. You are familiar with the operation of the equipment

and technologies described in this documentation.

- As commissioning engineers or service engineers, you have successfully

completed the training to qualify you to repair the automation systems. You

are also authorized to activate, ground and label circuits and equipment in

accordance with safety engineering standards.

It is also essential to comply with the legal and safety requirements for the ap

plication concerned during use. The same applies to the use of accessories.

The force transducer must only be installed by qualified personnel, strictly in

accordance with the specifications and with the safety requirements and regu

lations listed below.

C9B

A2088-3.0 en/de/frHBM

1 Scope of supply

•1 Force transducer C9B

•1 Mounting instructions

•1 Manufacturing certificate

2 General application instructions

Force transducers in the C9B type series are suitable for measuring compres

sive forces. Because they provide highly accurate static and dynamic force

measurements, they must be handled very carefully. Particular care must be

taken when transporting and installing the devices. Dropping or knocking the

transducers may cause permanent damage.

The relatively thin housing top and base must not be damaged, otherwise the

transducer will become useless, see section 3.2 on Page 9.

The specifications list the permissible limits for mechanical, thermal and elec

trical stress. It is essential that these are taken into account when planning the

measuring set‐up, during installation and ultimately, during operation.

C9B

A2088-3.0 en/de/fr HBM

3 Construction and mode of operation

3.1 Transducer

The measuring body is a membrane that is mounted on four strain gages

(SG) so that two are stretched and two compressed. Force is applied to the

measuring body of the C9B via a ball‐shaped load button (see also Page 13).

The membrane with the SG is elastically deformed by the force acting in the

measuring direction. The strain gauge changes its ohmic resistance in propor

tion to its change in length and so unbalances the Wheatstone bridge. If there

is a bridge excitation voltage, the circuit produces an output signal propor

tional to the change in resistance and thus also proportional to the applied

force.

3.2 SG cover

To protect the SG, the C9B force transducers are welded on the base, and on

the top with some types, with a thin metal plate cover (Fig 3.1). This proce

dure offers the SG a high protection against environmental influences.

Fig 3.1: SG protection

NOTE

The relatively thin housing cover (specially within the measuring range up to

200 N) and base (all measuring ranges) of the transducer must not be

stressed. The specifications list the permissible limits for mechanical, thermal

and electrical stress. They must be complied with, otherwise the transducer

can be destroyed.

C9B

A2088-3.0 en/de/frHBM

4 Conditions on site

Protect the transducer from weather conditions such as rain, snow, ice and

salt water.

4.1 Ambient temperature

The temperature effects on the zero signal and on the sensitivity are compen

sated.

To obtain optimum measurement results, the nominal (rated) temperature

range must be complied with. Constant, or very slowly changing, tempera

tures are best. Temperature‐related measurement errors are caused by heat

ing on one side (e.g. radiant heat) or by cooling. A radiation shield and all‐

round thermal insulation produces noticeable improvements, but must not be

allowed to set up a force shunt.

Tip

Hand warmth can cause a one‐sided warming of the transducer. Such temper

ature gradients can change, e.g. the zero point of the transducer. We there

fore recommend, after such warming, to wait approx. 15 minutes before start

ing measurements so that the thermal equilibrium can be restored.

4.2 Moisture and corrosion protection

Series C9B force transducers are hermetically encapsulated and are therefore

very insensitive to moisture. The transducers reach the protection class IP67

per DIN EN 60259 (test conditions: 0.5 hours under 1m water column). Nev

ertheless, the force transducers must be protected against permanent mois

ture influence.

The housing of the transducer is completely made of stainless steel. The

transducer must be protected against chemicals that could attack the trans

ducer body steel or the cable (polyurethane, PUR).

With stainless steel force transducers, please note that acids and all materials

which release ions will also attack stainless steels and their welded seams.

Should there be any corrosion, this could cause the force transducer to fail. In

this case, appropriate protective measures must be implemented.

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