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For the current input, a linear relationship may be established as it has been previously shown or it may be
squared (FLOW) as illustrated below:
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2.9.2. CAL Function
The calibrator may be used to calibrate or adjust any transmitter type. In a typical application, it would
generate a thermoresistance signal and would measure the output signal in the current input. Due to reasons of
quickness and easiness to compare errors at the input and output of the transmitter, the reading of the calibrator
current input may be displayed with the same unit of the generated signal, that is, units of temperature. Thus, both
readings for the calibrator input and output are scaled in units of temperature and the error can be promptly calculated.
Fig. 11 - SCALE Function (FLOW).
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