Application With Stillpipe - Siemens SITRANS LR250 Operating Instructions Manual

Application with Stillpipe

A stillpipe is recommended for products with a dK of less than 3, or if extremely turbulent or
vortex conditions exist. This mounting arrangement can also be used to provide optimum
signal conditions on foaming materials.
Notes:
• Near Range (2.5.1.) will be set at the factory. Check the Process Device Tag for specific
values.
• Suitable pipe diameters are 40 mm (1.5") to 100 mm (4").
• The pipe diameter must be matched with the horn size. Use the largest horn size that will
fit the stillpipe/bypass pipe (see
Mounting on a Stillpipe or Bypass Pipe
• See
This application is to obtain a level measurement proportional to the oil level in a fuel storage
vessel.
• Low Calibration Pt. is 5 m (16.4 ft) from
the sensor reference point.
• High Calibration Pt. is 0.5 m (1.64 ft) from
the sensor reference point.
• The stillpipe inside diameter is
50 mm (1.96").
• The maximum rate of filling or emptying
is about 0.1 m (4")/min.
Parameter
Parameter Name
type
Introduction
Language
Material
Response Rate
Quick Start
Wizard
Units
parameters
Low Calibration Point
High Calibration Point
Wizard Complete
Propagation Factor (2.5.3.)
Indepen-
Position Detect (2.5.7.2.)
dent param-
CLEF (Constrained Leading
eters
Edge Fit) Range (2.5.7.4.)
a)
The recommended values for the propagation factor and for CLEF range are dependent
on the stillpipe diameter. Refer to the next table for values.
Page 158 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS
Flat Faced Flange
on page 16).
on page 20 for installation guidelines.
sensor
reference
point
5 m
Low Cal.
Pt.
Options/Values Function
NEXT
NEXT
LIQUID LOW DK
MED
M
5
0.5
FINISH
a)
0.990
HYBRID
5.5 m
a)
vent hole
0.5 m
High
Cal.
Pt.
50 mm I.D.
Continue with Wizard.
Continue with current language.
Medium =1 m/minute
meters
5 m (16.4 ft)
0.5 m (1.64 ft)
Transfers Quick Start settings to
device.
P .F. for a 50 mm (1.96") I.D. stillpipe
5.5 m (18.04 ft)
7ML19985KL01