Measurement Type "Level - Siemens SITRANS P300 Operating Instructions Manual

Operating functions via HART
7.4 Selecting the measurement type
accepted by the device when they run monotonically. The y-coordinates, on the other hand,
may also be non-monotonic. However, a warning will be issued by the configuring device,
which you as the user have to recognize and acknowledge. The output of the characteristic
curve is not explicitly stored in a device variable, but rather is directly interconnected with the
input of the next function block in each case. The pairs of values 0%;0% and 100%;100%
are set as default values. In principle, rising and falling characteristics can be configured.
However, with regard to the device variable status, rising characteristics are preferable since
otherwise HIGH LIMIT and LOW LIMIT will have the opposite meaning.
See also
Measured value status (Page 7-10)
7.4.6

Measurement type "Level"

Introduction
Once you have configured the measurement type "Level", the device variables "Level",
"Volume" and "Mass" are activated. They are all inferred from the measured pressure. The
level block here represents a series of permanently interconnected functions which you need
to configure with appropriate parameters. Only then will you be given a meaningful
measured value for the three device variables.
7-6
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02