Siemens Sitrans LR250, Руководство по эксплуатации, Страница: 71 / 306

Commissioning
6.3 Application examples
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
69
6.3.2 Horizontal vessel with volume measurement
Note
The minimum distance from the flange face to the target is limited by Near Range (2.5.1.).
To obtain level measurement proportional to vessel volume in a chemical vessel:
● Low Calibration Point = 3.5 m (11.48 ft) from sensor reference point
● High Calibration Point = 0.5 m (1.64 ft) from sensor reference point
● Max. fill/empty rate = 0.2 m/min (0.65 ft/min)
Select vessel shape, Parabolic Ends, and enter values for A and L, to obtain a volume reading
instead of level.
In the event of a loss of echo: SITRANS LR250 is to report a user-defined value of 4.5 m (14.76
ft) after 2 minutes.