Siemens SIWAREX R 사용 설명서 - 페이지 8

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Siemens SIWAREX R에 대해서도 마찬가지입니다: 사용 설명서 (38 페이지)

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Edition 06/2009

Overloads may also occur in lifting direction when the force application is

permanently mounted to the load cell such as elastomer bearings on load cells of

series BB.

Lift off protection is necessary where there is a risk of the load carrier lifting off or

tipping over. This is essential for lightweight containers or high silos outdoors.

CAUTION

Overload protection devices must always be provided for load cells with low rated

loads to protect the cells from being damaged.

Use of the load cells beyond the maximum working load or maximum transverse

load can lead to irreparable faults and even breakage of the load cell.

Load cells may not be overloaded, e.g. by tightening screws, when adding

installation components.

NOTE

If load cells are loaded beyond their rated load this can lead to an error message

in the weighing module.

If load surges during the measuring mode cannot be ruled out, for example when

the load is set down in free fall, suitable precautions must be taken to avoid

damage to the load cell (e.g. elastomer bearings or higher load cells).

The load must be applied in exact measuring direction of the load cell. Torsion and

bending torques, off-center loads and transverse loads are disturbances which on

the one hand falsify the measuring result and on the other hand can damage the

load cell when they exceed the permissible limits. Load cells must therefore be

installed with suitable installation components (e.g. SIWAREX R installation

components). The possible errors mentioned above are then largely avoided. The

installation components allow enough freedom of movement to prevent heat

expansion leading to transverse loads.

Transverse forces such as are caused by wind, acceleration or conveyor belt

friction must be compensated by deflections or stops. Deflections must be installed

exactly vertical to the direction of action of the load cells so that no force

components occur in measuring direction. The deflections must be installed in such

a way that they do not twist for example when the application points expand. This

is most easily avoided by arranging the deflections in the same direction of

rotation.

The deflections to be installed should correspond to the principles used in weighing

technology. Ball-jointed deflections are available for most SIWAREX R combi-

installation units. Ball bolt deflectors up to a transverse load of 1000 kN are

available on request.

No parallel forces may be applied by filling and emptying devices and supply lines.

SIWAREX R Load Cells Operating Manual

A5E00159640

Technical Description