Siemens SITRANS P500, Руководство по эксплуатации, Страница: 147 / 238

Operate
6.3 Description of the operating functions
SITRANS P500 with HART
Operating Instructions, 12/2014, A5E02344528-09
147
Example
In the following calculation example these sensor limits are taken as 0 and 4 bar. You can
also set up a down-scaling; e.g. 1:2. A down-scaling of 1:2 corresponds to 50 % of the
nominal measuring range, i.e. in this case 2 bar.
MA Start of scale value L Level
ME Full scale value V Volume
p Pressure m Mass
Figure 6-7 Calculation of level, volume and mass
For the output scaling of "level", specify the measuring range limits with a unit from the level
range. Parameters may be assigned, for instance, at 10 and 20 m. This means that at a
process pressure of 0 bar, "level" is shown as 10 m and at 2 bar it is shown as 20 m.
See also
"2.1.6 Level" (Page 94)
6.3.2.4 Measuring mode "Volume"
Description
If parameters are assigned to the measuring mode "Volume", the geometry of the vessel can
be reflected in the level characteristic.