Siemens SITRANS P500, Operating Instructions Manual, Page: 154 / 238

Operate
6.3 Description of the operating functions
SITRANS P500 with HART
154
Operating Instructions, 12/2014, A5E02344528-09
Figure 6-14 "User" measurement type
Example
The first function is "Pressure input scaling", which specifies the pressure range within which
the user-specific characteristic operates. Ideally, this range corresponds to the sensor limits.
In the calculation example, 0 and 2 bar are assumed. This means that with process pressure
of 0.5 bar, there is a value of 25% on the characteristic curve.
p Pressure MA Start of scale value
ME Full scale value
Figure 6-15 Functions of the "User" block
In the calculation example, the two pairs of values 0%;0% and 100%;100% are assigned
parameters for the user-specific "characteristic curve". Any curve shapes can be calculated
with the help of 30 characteristic curve vertices.
In the calculation example, the value at the input of the characteristic 1:1 is transferred to the
output.