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9.15
Special characteristic curve
The transmitter makes it possible to connect sensors to the device. Sensor characteristic
curves valid for a large number of sensors are already programmed in the device.
Nevertheless, there are sensors, e.g. Cu100, for which this device does not offer sensor
linearization as standard. In this case, however, it is possible to store a customer-specific
special characteristic curve in the device. The sensor characteristic curve is then corrected
by scaling the measured value output.
The transmitter requires pairs of values (x-values, y-values) for customer-specific
characteristic curve correction. These pairs of values form sampling points and the output
characteristic curve is generated in between these points by linear interpolation from the
input characteristic curve. The maximum number of sampling points is restricted to 30 pairs
of values. The individual pairs of values are entered as a percentage of the set measuring
span.
Figure 9-4
SITRANS TH200/TH300
Operating Instructions, 06/2010, A5E00393069-03
Principle of customer-specific characteristic curve correction
9.15 Special characteristic curve
Functions
55
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