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6
CONDITIONS ON SITE
Protect the transducer from weather conditions such as rain, snow, ice, and salt water.
6.1
Ambient temperature
The effects of temperature on the zero signal and rated output are compensated. To
obtain optimum measurement results, comply with the nominal (rated) temperature
range. The strain gages are designed and arranged to ensure a high insensitivity to tem
perature gradients. Nevertheless, constant and at most slowly changing temperatures
have a favorable effect on accuracy.
Temperature-related measurement errors can be caused by heating on one side (e.g.
radiant heat) or by cooling. A radiation shield and thermal insulation on all sides provide
marked improvement, but must not be allowed to create a force shunt.
6.2
Moisture and corrosion protection
The force transducers are hermetically encapsulated and are therefore very insensitive to
moisture. Nevertheless, extreme humidity or tropical climate should be avoided if the
values are outside the classified limits (degree of protection IP67 as per DIN EN 60529).
With regard to steel force transducers, note that acids and all substances that release
ions also attack stainless steels and their weld seams. The potential resulting corrosion
can lead to failure of the force transducer. In this case, appropriate protective measures
must be provided.
6.3
Chemical influences
The steel transducer housings are protected by a powder coating. If they are used in
harsh environmental conditions (direct weathering, contact with corrosive media), users
should take additional protective measures. Apply a commercial protective coating finish
or a tar-based topcoat (underseal). The sheath of the connecting cable is made of sili
cone rubber. The uncoated force application areas are greased for corrosion protection.
Ensure that they are permanently greased.
6.4
Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate to such an extent
that some of the measuring force is diverted, invalidating the measured value (force
shunt).
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Z4A
CONDITIONS ON SITE
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