Siemens SIWAREX WL280, Operating Instructions Manual, Page: 13 / 58

Description
3.1 Application
RN-S SA
Operating Instructions, 09/2016, A5E32605810A-03
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3.1.4 Use of the grounding cable
The grounding cable is used to protect the load cells from undesired currents. The causes of
such currents are, for example:
● Equalizing currents with missing or faulty equipotential bonding conductors
● A lightning strike nearby
● Welding work
● Static charge
Figure 3-1 Example usage of the grounding cable
3.1.5 Application of guide elements
Guide elements route horizontal forces acting on load bearing implements directly into the
foundation. Transverse forces onto the load cells do not occur as a result. The result of the
load cells is not falsified by this influence.
Guide elements are used in the following cases:
● Horizontal forces occur during the weighing procedure. This is the case with all dynamic
weighing procedures or if containers are weighed outdoors where wind can have an
effect.
● Movement of the load bearing implement as a result of horizontal forces should be
prevented. This is the case with braking or acceleration forces of belt or roller table scales
or with mixing tanks in which unbalance can occur as a result of an agitator.
The SIWAREX WL280 RN-S SA guide elements are used together with the compact
installation units. The guide elements have the following characteristics:
● Subsequent attachment to the compact installation unit
● The single-sided attachment of a guide element can be made either on the front or rear of
the compact installation unit.
● The double-sided attachment of two guide elements doubles the possible transverse
force.
● Parts made of stainless steel for applications in the food and pharmaceutical industries
The weighing equipment must not be tensioned by guide elements. The guide elements
must not prevent changes in the dimensions of the load bearing implement resulting from