Commissioning
6.3 Application examples
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH
63
Parameter
type
Parameter No./Name
Options/Values
Function
Response Rate
MED
Medium =1 m/minute
Units
M
meters
Operating mode
LEVEL
Level is reported as Volume
when a vessel shape is
selected.
Low Calibration Point
5
5 m (16.4 ft)
High Calibration Point
0.5
0.5 m (1.64 ft)
Wizard Complete
FINISH
Transfers Quick Start set-
tings to device.
Independent
parameters
Propagation Factor (2.5.3.)
a)
0.988
P.F. for a 50 mm (1.96") I.D.
stillpipe
Position Detect (2.5.7.2.)
HYBRID
CLEF Range (2.5.7.4.)
a)
4.3
Low calibration point -
0.7 m = 4.3 m (14.1 ft)
a)
The recommended values for the propagation factor and for CLEF range are dependent on the
stillpipe diameter. See Propagation Factor/Stillpipe Diameter for values.
①
sensor reference point
③
low calibration point
②
air gap
④
CLEF range 2.5.7.4.
A
700 or 1000 mm (see CLEF Range settings in table below)
Propagation Factor/Stillpipe Diameter
Values
Range
0.3 to 1.0 depending on pipe size
Default
1.0000
Nominal Pipe Size
a)
40 mm (1.5") 50 mm (2")
80 mm (3")
100 mm (4")
Propagation Factor
0.9844
0.988
0.9935
0.9965
CLEF Range (2.5.7.4.) settings
Low calibra-
tion point -
700 mm (2.29
ft)
b)
Low calibra-
tion point -
700 mm (2.29
ft)
b)
Low calibra-
tion point -
1000 mm
(3.28 ft)
b)
Low calibra-
tion point -
1000 mm
(3.28 ft)
b)
a)
Since pipe dimensions may vary slightly, the propagation factor may also vary.
b)
CLEF range covers the whole measurement range except first 700 or 1000 mm from sensor refer-
ence point