HBM C2 Series Manual de usuario

Mounting Instructions | Montageanleitung |

Notice de montage

English Deutsch Français

C2A/…, C2A/…/Exd

Hottinger Baldwin Messtechnik GmbH

Im Tiefen See 45

D-64239 Darmstadt

Tel. +49 6151 803-0

Fax +49 6151 803-9100

[email protected]

www.hbm.com

Mat.: 7-2001.0074

DVS: A1572-3.0 HBM: public

09.2017

EHottinger Baldwin Messtechnik GmbH.

Subject to modifications.

All product descriptions are for general information only.

They are not to be understood as a guarantee of quality or

durability.

Änderungen vorbehalten.

Alle Angaben beschreiben unsere Produkte in allgemeiner

Form. Sie stellen keine Beschaffenheits- oder Haltbarkeits

garantie dar.

Sous réserve de modifications.

Les caractéristiques indiquées ne décrivent nos produits

que sous une forme générale. Elles n'impliquent aucune

garantie de qualité ou de durabilité.

Mounting Instructions | Montageanleitung |

Notice de montage

English Deutsch Français

C2A/…, C2A/…/Exd

2A1572-3.0 HBM: public C2A/…, C2A/…/Exd

English

1 Safety instructions 3........................................

2 Markings used 6............................................

2.1 The markings used in this document 6..........................

3 Notes on mounting 7.......................................

4 Load introduction 8.........................................

5 Connection 9...............................................

5.1 Cabling 9...................................................

5.2 Connection technology 9......................................

5.3 Parallel connection of several transducers 10.....................

5.4 Connection using the four‐wire circuit 11.........................

5.5 Cable extension 11...........................................

5.6 Notes on cable routing 12......................................

6 Specifications 13............................................

7 Dimensions 16..............................................

Safety instructions

C2A/…, C2A/…/Exd A1572-3.0 HBM: public 3

1 Safety instructions

The C2A... load cells can be used as machine compo

nents (e.g. with container weighing). In these cases

please note that in order to obtain a high measurement

sensitivity the load cells have not been designed with the

safety factors usually encountered in machine design. If

component fracture may lead to damage to property or

injury to persons, safety measures according to the rele

vant accident prevention regulations (e.g. support against

collapse, overload protection) must be taken by the user.

In chapter 6 „Specifications“, on page 13 we provide

important details in this respect, such as:

Ssave load limit,

Sside load limit,

Sbreaking loads and

Spermissible dynamic loads.

The electronic system processing the measurement

signal should be designed such that no consequential

damage occurs as the result of a failure of the measure

ment signal.

Use in accordance with the regulations

C2A... type load cells have been designed for weighing

applications. Use for any additional purpose shall be

deemed to be not in accordance with the regulations.

To ensure safe operation, the load cells should only be

used 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.

Safety instructions

4A1572-3.0 HBM: public C2A/…, C2A/…/Exd

The load cells are not a safety element within the mean

ing of its use in accordance with the regulations.

General dangers due to non‐observance of the

safety instructions

The C2A... load cells correspond to the state of the art

and are fail‐safe. The load cells 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 load cell must have read and

understood the Mounting Instructions and in particular

the technical safety instructions.

Residual dangers

The scope of supply and performance of the load cells

covers only a small part of weighing technology. In

addition, equipment planners, installers and operators

should plan, implement and respond to the safety

engineering considerations of weighing technology in

such a way as to minimize residual dangers. Prevailing

regulations must be complied with at all times. There

must be reference to the residual dangers connected

with weighing technology.

Environmental conditions

In the context of your application, please note that acids

and all materials which release (chlorine) ions will attack

all grades of stainless steel and their welding seams.

This may result in corrosion which can lead to the failure

of the load cell. In such cases the operator must take

appropriate safety measures.

Prohibition of own conversions and modifications

The load cells must not be modified from the design or

safety engineering point of view except with our express

Safety instructions

C2A/…, C2A/…/Exd A1572-3.0 HBM: public 5

agreement. Any modification shall exclude all liability on

our part for any damage resulting therefrom.

Qualified personnel

These load cells are only to be installed by qualified

personnel strictly in accordance with the specifications

and with the safety rules and regulations. 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.

Accident prevention

Although the specified breaking load is several times the

max. capacity, the relevant accident prevention

regulations from the trade associations must be complied

with.

Explosion proof versions

Important

Please consider the notes in the document ”Safety in

structions for Ex load cells”, which is attached to the

scope of supply of the C2A/.../Exd load cells.

SUsers must comply with all relevant erection regula

tions during installation.

SThe installation conditions listed in the certificate of

conformity and/or type examination certificate must be

complied with.

Markings used

6A1572-3.0 HBM: public C2A/…, C2A/…/Exd

2 Markings used

2.1 The markings used in this document

Important instructions for your safety are specifically

identified. It is essential to follow these instructions in

order to prevent accidents and damage to property.

Symbol Significance

CAUTION This marking warns of a potentially dangerous

situation in which failure to comply with safety

requirements can result in slight or moderate physical

injury.

Notice This marking draws your attention to a situation in

which failure to comply with safety requirements can

lead to damage to property.

Important

This marking draws your attention to important

information about the product or about handling the

product.

Tip

This marking indicates application tips or other

information that is useful to you.

Information

This marking draws your attention to information

about the product or about handling the product.

Emphasis

See….

Italics are used to emphasize and highlight text and

references to other chapters and external documents.

Notes on mounting

C2A/…, C2A/…/Exd A1572-3.0 HBM: public 7

3 Notes on mounting

SHandle the transducer carefully.

SThe transducer seating must be horizontal, even and,

together with the transducer mounting surface, it must

be absolutely clean.

SDust, dirt and other foreign matter must not be al

lowed to collect so that the deflection of the trans

ducer is impaired, leading to possible erroneous

measurements.

SDo not overload the transducer (e.g. by unevenly dis

tributed loads); if necessary, provide overload protec

tion (e.g. supports).

SEach transducer should be bridged by a copper wire

(approx. 16 mm2) during or immediately after installa

tion, so that no welding currents can flow across the

transducer.

Load introduction

8A1572-3.0 HBM: public C2A/…, C2A/…/Exd

4 Load introduction

When applied in weighing equipment, load cells are sub

jected to unwanted side forces and moments. These may

arise from deformation of the loaded weighing machine

structure or through thermals strains. To keep the effects

on the measurement resulting from these forces and mo

ments as low as possible, HBM supplies pendulum sup

ports and rubber‐metal bearings as load introduction

components. Both types of load introduction components

enable a design with a degree of horizontal movement

with respect to the load cells.

A deflection causes a reactive force which attempts to

restore the weighing machine to its original position. With

the pendle supports this restoring force is proportional to

the deflection and the current loading and with elastomer

bearings it is just proportional to the deflection. This

means that a different characteristic is obtained, particu

larly under partial loading conditions.

The rubber‐metal bearing also possesses higher damp

ing in the horizontal and vertical directions. In both cases

no stay rods are needed. It is sufficient to limit the hori

zontal movement of the weighing machine structure us

ing mechanical stops (take note of smax in chapter 7, on

page 16).

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