Horizontal Vessel With Volume Measurement - Siemens 7ML5431 Operating Instructions Manual

6.3.2

Horizontal vessel with volume measurement

Note
The minimum distance from the flange face to the target is limited by Near Range (2.8.1.).
To obtain level measurement/4 to 20 mA output 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 go into Fail-safe High after 2 minutes.
①
②
③
④
⑤
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG
Sensor reference point
0.5 m
High Calibration Point
3.5. m
Low Calibration Point
⑥
A = 0.8 m
⑦
L = 6 m
⑧
100% = 8000 L
⑨
Volume reading
Commissioning
6.3 Application examples
65