Commissioning
6.3 Application examples
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
71
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.
(Blanking) will be set at the factory. Check the process connection
tag for specific values.
Suitable pipe diameters are 40 mm (1.5") to 100 mm (4").
The pipe diameter must be matched with the antenna size. Use the largest antenna size
that will fit the stillpipe/bypass pipe. See Dimension drawings (Page 187).
See Mounting on a Stillpipe or Bypass Pipe (Page 32) for installation guidelines.
This application is to obtain a level measurement and corresponding 4 to 20 mA output
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.
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