Mounting - HBK RTN/M2 Serie Instrucciones De Montaje

5

MOUNTING

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When fitting the tank, vessel or silo, ensure that e.g. when lowering it onto the bearing
points no shock loads act upon the module. Even short term loads that exceed the
load cell limit values can result in damage to the load cell.
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For heavy containers or unfavourable fitting conditions, the use of appropriate fitting
aids (auxiliary supports, lifting devices) is required.
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Lower module plate and upper module plate are to be firmly connected with the
foundations or tank connection.
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The weighing modules must be assembled such that, in their original state, they are
free from lateral forces. The pendulum bearing version requires the fitted pendulum
bearing to be aligned exactly vertically, if possible. This is the case, if foundations and
tank connection are horizontal and the mounting bores on the basic construction and
the container connection are sufficiently aligned. Slotted holes in the module plates
facilitate alignment.
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For protection against welding currents which may destroy the electronic components
of the transducer the fitted EEK4 ground cable is provided.
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Especially in the case of a statically indefinite bearing uneven loading of the modules
can occur due to an insufficiently precise height adjustment. This unevenness is to be
checked on the individual load cells by applying an excitation voltage and comparing
the output voltages. In order to avoid any overloads, major unevenness is to be
compensated by inserting spacer plates on the bearings with the lowest loads.
Mounting of the load cell
In order to assemble the load cell into the weighing module the pre‐fitted dummy needs
to be removed.
Mounting of load cells up to a max. capacity of 4.7 t: see Fig. 4.1
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Remove the anti‐liftoff device by undoing the 2 hexagonal screws
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Loosen the lateral stops
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Use a suitable lifting device to lift the respective tank base by approx. 10 mm
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Undo the centering discs
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Remove the dummy with the mounting base of the RTN by lifting lightly and withdraw­
ing to one side (for pendulum bearing version, with pendulum bearing)
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Remove mounting from dummy and fit to load cell; tightening torque of the 4 screws:
4 N⋅m
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Secure and position load cell with mounting base by means of centering discs on the
lower module plate. Apply the enclosed grease to the load introduction parts of the
load cell.
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RTN/M2
MOUNTING