18 Temperature Interfaces
18.1 General Notes
The 2293 unit supports 6 internal and max. 24 external PT100 Class A sensors.
Sensors for magnetic surface (a) or for liquids (b) are available. See also chapter “Accessories”.
By a wrong probe handling or a not proper probe setup or connection, large temperature
errors can be the result!
Surface temperature measurement is a delicate task. One has to consider the
following main points:
Ensure best thermal conductivity between surface and temperature sensor.
Use thermal compound or grease to maximize heat transfer.
Apply pressure to the probe in order to properly contact the surface (spring is
loaded only on magnetic surfaces!
Isolate the temperature sensor from the ambient air in order to avoid unwanted
cooling or heating of the sensor. This is especially important if the temperature
difference between surface and ambient air is high (e.g. >10°C)
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