HBK PW15B Montageanleitung Seite 6

Additional safety precautions
Load cells cannot (as passive transducers) implement any (safety‐relevant) cutoffs. This
requires additional components and constructive measures for which the installer and
operator of the plant is responsible.
In cases where a breakage or malfunction of the load cells would cause injury to persons
or damage to equipment, the user must take appropriate additional safety measures that
meet at least the requirements of applicable safety and accident prevention regulations
(e.g. automatic emergency shutdown, overload protection, catch straps or chains, or
other fall protection).
The layout of the electronics conditioning the measurement signal should be such that
measurement signal failure does not cause damage.
Explosion protection version option
The following also apply to the load cells supplied with this option, that are to be used in
potentially explosive atmospheres:
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It is essential to comply with the relevant code of practice during installation.
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In the explosion protection version, the connection cable of the single point load cells
has free ends (for the cable wire assignment, see section 5.1).
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There must be compliance with the installation conditions cited in the Certificate of
Conformity and/or the Type Examination Certificate.
General dangers of failing to follow the safety instructions
Load cells are state‐of‐the‐art and reliable. Transducers can give rise to residual dangers
if they are incorrectly operated or inappropriately mounted, installed and operated by
untrained personnel. Everyone involved with siting, starting up, operating or repairing a
load cell must have read and understood the Mounting Instructions and in particular the
technical safety instructions. The load cells can be damaged or destroyed by non‐desig­
nated use of the load cells or by non‐compliance with the mounting and operating instruc­
tions, these safety instructions or any other applicable safety regulations (BG safety and
accident prevention regulations) when using the load cells. Load cells can break, particu­
larly in the case of overloading. The breakage of a load cell can also cause damage to
property or injury to persons in the vicinity of the load cell.
If load cells are not used according to their designated use, or if the safety instructions or
specifications in the mounting and operating instructions are ignored, it is also possible
that the load cells may fail or malfunction, with the result that persons or property may be
affected (due to the loads acting on or being monitored by the load cells).
The scope of supply and performance of the transducer covers only a small area of
weighing technology, as measurements with (resistive) sensors presuppose the use of
electronic signal processing. In addition, equipment planners, installers and operators
should plan, implement and respond to the safety engineering considerations of the
weighing technology in such a way as to minimize residual dangers. Pertinent national
and local regulations must be complied with.
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PW15B
SAFETY INSTRUCTIONS