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6
CONDITIONS AT THE INSTALLATION 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 or very slowly changing temperatures are
best. 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.
The degree of protection of the sensors depends on the choice of electrical connection.
In the standard version with a bayonet connector, the sensor achieves degree of protec
tion IP67 as per DIN EN 60259 (test conditions: 0.5 hours under 1 m water column). This
applies when the plug is connected.
Optionally, the force transducers are also available fitted with a fixed cable. In this ver
sion, all U10 achieve degree of protection IP68 with a nominal (rated) force equal to or
greater than 12.5 kN. In the threaded connector version, the sensors achieve degree of
protection IP64. The permanently connected amplifier module achieves IP67 protection.
The transducer must be protected against chemicals that could attack the steel (nomi
nal (rated) forces from 12.5 kN) or aluminum (nominal (rated) forces up to 5 kN).
With stainless steel force transducers, please note that acids and all materials which
release ions will also attack stainless steels and their weld seams. Any resulting corro
sion could cause the force transducer to fail. In this case, appropriate protective mea
sures must be provided.
We recommend protecting the transducer against long-term exposure to moisture and
weather conditions.
6.3
Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate sufficiently to
divert some of the measuring force onto the housing, thus distorting the measured value
(force shunt). The relevant areas are marked in Fig. 6.1.
14
CONDITIONS AT THE INSTALLATION SITE
U10M
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