HBM HBK U93, Mounting Instructions

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U93
MECHANICAL INSTALLATION
12
Load must not be applied here!
Fig. 6.1 Avoid the application of load to the marked surface
Important
The cable fastening side of the transducer should always be connected directly with the
rigid customer-side force transfer areas. Ensure that the cable is laid so that, where pos­
sible, no force shunt is caused by the cable (e.g. through the weight or stiffness of the
cable).
6.3 Mounting for tensile/compressive loading
The transducer is bolted directly (via the ring‐shaped flange faces) onto a rigid, fully‐bear­
ing structural element (such as a profile, a cover or a plate). With this method of installa­
tion, transducers can measure axial forces in both the tensile
and pressure directions.
Alternating loads can also be recorded perfectly.
S
For exact positioning, the transducer is fitted with centering aids on the upper and
lower mounting surfaces.
S
The upper and lower bearing pads must be flat and even. The roughness of the base
bearing pad must not exceed R
a
= 0.8
μ
m.
S
The component mounted on the U93 must be sufficiently hard and must not deform
when load is applied. We recommend a hardness of 43HRC.
S
Thoroughly clean the bearing pads before assembly.
S
For dynamic alternating loads, the tightening torque for the screws must be selected
so that the screws are pre‐stressed to above the operating load of the transducer. The
requisite data can be found in the table below.