Operating functions via HART
7.4 Selecting the measurement type
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02
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Figure 7-1 Measurement type "Pressure"
DV Device Variable MA Zero value
PV Primary Variable ME Limit value
SV Secondary Variable
TV Tertiary Variable
QV Quarternary Variable
7.4.5 Customized characteristic curve
Introduction
The customized "characteristic curve" is continuously active as an identical function in the
two following measurement types "Level" and "User". This means that it always provides a
result for the following function, thus also influencing the measured value status of the
affected device variables.
In the device, the characteristic curve vertices are only provided once in the non-volatile
memory. Therefore, if the measurement type is changed, you will usually need to adjust the
characteristic curve accordingly.
The characteristic curve function requires the input of at least two and up to 30 characteristic
curve vertices, entered as pairs of values x%;y%. The values for the x-coordinate are only
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