HBK HLCM, Mounting Instructions

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HLCM
MOUNTING
8
5 MOUNTING
S
The module is delivered with lifted cover plate. Prior to mounting, the cover plate has
to be lowered by unscrewing the nut.
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It should be ensured when mounting the tank that, for example, no shock loads are
applied to the module when lowering it onto the supports. Even short‐term loads
which exceed the load cell limits can lead to damage.
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With statically undefined supports, non‐uniform loading of the modules occurs due to
flexibility as the load is taken up or due to inadequate accuracy in the height adjust­
ment. This non‐uniformity should be checked on the individual load cells by applying
an excitation voltage and comparing the output voltages. To prevent overloads, large
non‐uniformities should be compensated by inserting shims under those supports
which are least loaded.
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With heavy tanks or unfavorable installation conditions the use of mounting aids (aux­
iliary supports, jack equipment) is recommended.
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The weighing modules should be mounted such that are free of transverse forces in
the initial state. This means that the mounted pendle support must be lined up as near
to the perpendicular as possible. This is the case when the foundation and tank joint
are horizontal and the mounting holes on the foundation and the tank are sufficiently
aligned.
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The mounting plate and the cover plate should be firmly fixed to the foundation, re­
spectively the tank joint.
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As protection against welding currents that can damage the electronic parts of the
load cell, it is recommended that the EEK4 grounding cable is used.
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In load cells with an additional outer braided wire over the cable (item no. K-HLCM
with option B2, together with codes 3R, 6R or 12R), this cable is only used for protec­
tion against increased mechanical stress (e.g. damage caused by gnawing rodents).
To avoid accidental energization, the outer braided wire has to be connected to poten­
tial equalization at least once. This outer braid is not used to shield the load cell. The
inner braid of the load cell cable is used for shielding.
Information
If the load cell is to be replaced, the upper module plate can be lifted by max. 1.5 mm.
Lock the nut in place to hold the upper module plate in this position. Dismounting the tank
itself is not required.
When replacing the load cell, the following tightening torques of the fastening screws must
be considered
110 kg - 2.0 t
electrogalvanized 130 N
V
m
stainless 90 N
V
m
2.2 t - 4.4 t electrogalvanized 400 N
V
m
stainless 400 N
V
m