HBM C16A Série Instructions De Montage page 13

Wägezelle Load cell
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Below, we use a weighbridge as an example for the mechanical installation. We recommend that
you proceed as follows:
D Use appropriate lifting gear to lift one face of the weighbridge that has already been centred.
D Prepare the load introduction parts and mount the part with the rotation stop dowel pin below
and the load introduction part without the dowel pin above. The lower load introduction part
must be aligned such that the dowel pin points in the direction in which, later on, the cable box
and the type plate are to be point, although do not yet finally fix it.
D Use a sufficient amount of the grease provided with the load cells to protect from wear, tear,
dirt and corrosion the upper and lower load introduction parts in the load carrying element, the
dowel pin and the rotation stop on the load cell.
D Fix the lower load introduction parts with a spanning washer when using EPO3 or eccentric
washers when using C16/EPU or C16/ZOU44. If HBM's C16 mounting kit is used (order no.
2--9290.0057, also included in 1--C16/EPU44 and C16/ZOU44), fasten the sealing rubber
tubing for protecting the contact between load cell/lower load introduction part to the load cell
housing with the tube clip included in the scope of supply.
D Now insert the load cells by rotating them into the lower load introduction part such that the
dowel pin engages into the rotation stop recess.
D Now let down the weighbridge carefully such that there is just no load on the load cells and
that they can be aligned perpendicularly. At the same time, introduce the load cells' upper
load introduction parts into the upper load carrying element. For this purpose, you can move
the lower load introduction element with the eccentric washers loosened. We recommend that
you use an appropriate prism level to check the load cell's perpendicular mounting position by
holding it against the cylindrical housing tube. Then let down the bridge and proceed in the
same way for the other face.
D After finishing the mounting procedure, once again check the perpendicular mounting position
for all the load cells, with the bridge swinging free and if required, lift the bridge to correct the
position. Exact mounting is an important condition for accurate measurements and minimum
corner deviation.
D Once the final perpendicular alignment of the load cell has been completed, turn the eccentric
washers towards the load introduction part and secure by tightening the fixing screws.
If there are extremely long distances between the supports of the load cells or if the weighbridges
bend easily, the rolling movements of the load cell produced by a load can cause discrepancies
in the results. This rolling motion is assisted by a lateral drift of the upper load cell load
introduction points under load, if the contact zone between the load introduction part and the load
cell is far below the neutral bending axis of the weighbridge.
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Capteur de pesage
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not loaded
C16A/...
neutral bending axis
13