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Revision 11/12
Limit stop
Limit stop
Oscillation limiters at a permitted oscillation of 4 mm in a dual weighing
platform example.
Fig. 1-2 Oscillation limit example
Load cells of the BB series have oscillation limits integrated in them with the combi-
mounting units.
CAUTION
When using load cells with low nominal loads, overload protection are to be used,
cross-directional as well, in order to protect the cells from damage.
The use of load cells above the maximum working load or the maximum cross-load
can lead to irreparable faults or damage to the load cells or the mounting unit.
1.3
Guide Elements
Guide elements compensate for cross-forces immediately. They allow no sideways
movement of the load platform. At the same time, they cannot change shape when
distances change in the support points (e.g. thermal expansion). Guide element
positioning is shown in Fig. 1-3. They are used if the weight must be determined
under the influence of a transverse force.
Guide elements must be constructed perpendicular to the effective direction of the
load cells so that there are no force components in the direction of measurement.
Stretching the guide elements is best avoided when they are positioned with the
same direction of rotation. To fasten a loading platform or a container in a static
position, three guide elements will suffice. With four guide elements, there is a
danger of these putting force on each other and that this could cause weighing
errors. If four guide elements are used anyway, they should be installed with
enough play to compensate.
The guide elements should correspond with the principles used in the weighing
technology. Ball-pin guides for up to 1000 kN transverse force are also available
upon request.
Document-No.: A5E00295975A
2.8
2.8
2.8
Platform
Platform
±2.8
±2.8
±2.8
General Conditions for Installation and Assembly
Drill hole
Drill hole
Bolt
Bolt
Platform
Platform
4
4
±4
±4
Page 8
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