HBM Z4A, Mounting Instructions, Page: 35 / 76

35
Z4A
HBM A0697-7.0 de/en/fr
12 Conditions on site
12.1 Ambient temperature
The effects of temperature on the zero signal and on the sensitivity are
compensated. To achieve optimal measurement results the nominal
temperature range must be maintained. Temperature-induced measurement
errors can be caused by heating (for example radiant heat) or cooling on one
side. A radiation shield and all-round heat insulation bring about marked
improvements. They must not form a force shunt.
12.2 Moisture
Extreme humidity or a tropical climate should be avoided if this means that the
classified limit values are exceeded (degree of protection IP67 under DIN EN
60529).
12.3 Air pressure
Changes in air pressure affect the force transducer in the same way as a
change in force. In the case of normal changes in ambient pressure
" 20 mbar, however, the effect on the measurement signal is negligible
(changes in air pressure of
"
10 mbar only have an effect on the zero signal
of 6 N for 20 kN and 50 kN transducers).
12.4 Chemical effects
The steel housing of the transducers is protected by a powder coating. If used
in difficult environmental conditions (direct weather effects, contact with media
which encourage corrosion) additional protective measures should be
employed by the user. The unit can be painted with commercial protective
paint or a tar-based coating (underseal). The sheath of the connection cable
is made of silicon rubber.
The uncoated force introduction areas are greased to provide protection
against corrosion.