Mechanical Installation; Important Measures For Installation; General Installation Guidelines - HBM u5 Montageanleitung

U5
5

Mechanical installation

5.1 Important measures for installation

• Handle the transducer with care.
• Make sure that there is a rigid base when measuring compressive forces.
• The force‐introduction surfaces must be totally clean and fully bearing.
• Comply with the engagement depths for threaded rods or knuckle eyes.
• Do not overload the transducer.
• Welding currents must not be allowed to flow over the transducer. If there is
a risk that this might happen, you must use a suitable low‐ohm connection
to electrically bypass the transducer. HBM, for example, provides the highly
flexible EEK ground cable, which can be screwed on, both above and
below the transducer.
WARNING
If there is a risk of breakage through overload on the transducer
and thus a risk to persons, additional safety measures are to be
taken.

5.2 General installation guidelines

The direction of measurement in which the forces work should be as much
towards the transducer as possible. Torsion and bending moments, eccentric
loading and transverse forces may result in measurement errors and if the
limit values are exceeded, could destroy the transducer.
The transducer can take up 50 % (60 % at 100 kN) of its nominal force as
transverse force by reference to a force introduction point on the
force‐introduction surface, without losing its mechanical competence.
As mounting accessories for the transducers, HBM supplies U5 standard
range knuckle eyes and adapters as accessories. Knuckle eyes are suitable
for use during quasi‐static loading (10 Hz alternating loads). In the case of
dynamic loading at a higher frequency, you should use flexible tension bars.
Knuckle eyes prevent the introduction of torsional moments and when 2
knuckle eyes are used, stop bending moments and transverse and angular
loading being introduced in the transducers.
Various installation fastenings are possible for the transducer (see Fig. 5.1
and Fig. 5.2).
A0809-8.0 en/de/fr
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HBM