Conditions On Site; Ambient Temperature; Moisture And Corrosion Protection - HBM U9C Notice De Montage

Conditions on site

5 Conditions on site
The U9C series force transducers are made of rustless materials. It is never­
theless important to protect the transducers from weather conditions such as
rain, snow, ice and salt water.
5.1

Ambient temperature

The effects of temperature on the zero signal and on sensitivity are compen­
sated.
To obtain optimum measurement results, the nominal (rated) temperature
range must be complied with. The compensation of the temperature effect on
the zero point is implemented with great care, nevertheless temperature gradi­
ents can have a negative effect on the zero point stability. Constant or very
slowly changing temperatures are therefore best. A radiation shield and all-
round thermal insulation produce noticeable improvements. However, they
must not be allowed to set up a force shunt, i.e. the slight movement of the
force transducer must not be prevented.
5.2

Moisture and corrosion protection

The force transducers are hermetically encapsulated and are therefore very
insensitive to moisture. The transducers achieve protection class IP67.
Despite the careful encapsulation, it makes sense to protect the transducers
against permanent exposure to moisture.
The force transducer must be protected against chemicals that could attack the
steel.
With stainless steel force transducers, note that acids and all materials which
release ions will in general also attack stainless steels and their welded seams.
Should there be any corrosion, this could cause the force transducer to fail. In
this case, appropriate protective measures must be implemented.
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A3815-1.4 HBM: public
U9C