Mechanical Installation; Important Precautions During Installation; General Installation Guidelines; Mounting Accessories For Tensile/Compressive Loading - HBK Z30A Mounting Instructions

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MECHANICAL INSTALLATION

7.1

Important precautions during installation

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treat the transducer gently
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if measuring compressive forces, make sure there is a solid support structure
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the force‐introduction surfaces must be scrupulously clean and fully load‐bearing
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keep to the depths of engagement for threaded rods or knuckle eyes
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do not overload 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.
7.2

General installation guidelines

The measurement direction in which forces act on the transducer must be as precise as
possible.
WARNING
Torsion and bending moments, eccentric loading and transverse forces result in measure­
ment errors and if limit values are exceeded, could destroy the transducer.
7.3

Mounting accessories for tensile/compressive loading

Knuckle eyes are available for installing with the Z30A (see page 24). These mounting
accessories prevent the introduction of torsional moments into the transducer. Using two
knuckle eyes will also exclude bending moments, shear loading and eccentric loading.
Knuckle eyes are mainly provided to deal with static tensile loading on the transducer.
For dynamic loading, Z30A transducers must be installed free from play. Knuckle eyes
have only limited application in the case of dynamic loading, since alternating dynamic
stress increases the play in the universal joints and falsifies the measured value. It also
produces a self‐amplifying load cycle which can destroy the knuckle eyes. The breaking
force is only 150% F
Thrust pieces EDO3/1kN or EDO4/50kN (see page 26) and two load buttons (see page
25) are available for introducing compressive forces.
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MECHANICAL INSTALLATION
Z30A