HBM HBK S2M, Mounting Instructions, Page: 12 / 124

S2M
CONDITIONS ON SITE
10
6 CONDITIONS ON SITE
Protect the transducer from weather conditions such as rain, snow, ice and salt water.
6.1 Ambient temperature
The temperature effects on the zero signal and on the sensitivity are compensated.
To obtain optimum measurement results, the nominal (rated) temperature range must be
observed. Constant, or very slowly changing temperatures are optimal. Temperat­
ure‐related measurement errors are caused by heating on one side (e.g. radiant heat) or
by cooling. A radiation shield and all‐round thermal insulation produce noticeable
improvements, but must not be allowed to set up a force shunt.
6.2 Moisture and humidity
Series S2M force transducers are protected against moisture. The transducers attain
protection class IP67 per DIN EN60259. Despite this, force transducers must be protec­
ted against permanent exposure to moisture.
The transducer must be protected against chemicals that could attack the aluminum,
potting material or the cable.
The transducer can also malfunction due to corrosion. Implement some means of protec­
tion if this danger exists.
Notice
Moisture must not be allowed to penetrate the free end of the connection cable. Otherwise
the characteristic values of the transducer could vary, and cause measurement errors.
6.3 Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate sufficiently to
divert some of the force to be measured, thus invalidating the measured value (force
shunt).
Notice
Measurement errors may be the result if dust or dirt is deposited inside the load cells. The
relevant areas are marked by arrows in Fig. 6.1.