HBM PW29 Series, Инструкция по монтажу, Страница: 10 / 56

Conditions on site
8
A03313_02_Y00_00 HBM: public
PW29
2.2 Symbols on the product
CE mark
The CE mark enables the manufacturer to guarantee that
the product complies with the requirements of the rele­
vant EC directives (the declaration of conformity is avail­
able at
http://www.hbm.com/HBMdoc ).
3 Conditions on site
Series PW29 load cells are hermetically encapsulated and are therefore very
insensitive to moisture influence. The transducers attain protection class IP68
(test conditions: 100 hours under 1m water column) and IP69K (water at high
pressure, steam cleaner), as per DIN EN60529. Nevertheless, the load cells
must be protected against permanent moisture influence.
3.1 Corrosion protection
The load cell must be protected against chemicals that could attack the trans­
ducer body steel or the cable.
Notice
Acids and all substances that release ions also attack stainless steels and their
welded seams.
The resultant corrosion can cause the transducer to fail. If this is the case, you
must provide appropriate means of protection.
3.2 Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate suffi­
ciently to divert some of the measuring force onto the housing, thus invalidating
the measured value (force shunt).