User's Manual

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
Th
e 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.