Commissioning
6.2 Application examples
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB
53
6.2.2
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.
①
Sensor reference point
⑥
A = 0.8 m
②
0.5 m
⑦
L = 6 m
③
High calibration point
⑧
100% = 8000 L
④
3.5. m
⑨
Volume reading
⑤
Low calibration point
Parameter type Parameter No./Name
Options/
Values
Function
Quick Start
Wizard
parameters
Material (1.2.)
LIQUID
Response Rate (1.3.)
MED
Medium =1 m/minute
Units (1.4.)
M
meters
Operating Mode (1.5.)
LEVEL
Level is reported as
Volume when a vessel
shape is selected.
Low Calibration Point (1.6.)
3.5
3.5 m (11.48 ft)
High Calibration Point (1.7.)
0.5
0.5 m (1.64 ft)
Apply? (Apply changes) (1.8)
YES
Transfers Quick Start
settings to device.
