Operating Instructions

Table Of Contents
1)
Mounting in a pipe greater than 100 mm (4") can cause large errors, and therefore is not
recommended.
Suitable pipe diameters: Horn antenna 40 to 100 mm (1.5 to 4")
PVDF antenna 50 mm (2") only
Flanged encapsulated antenna 50 to 100 mm (2 to 4")
Hygienic encapsulated antenna 50 to 100 mm (2 to 4")
Not recommended: > 100 mm (4")
Bypass vent: Required at the upper end of the bypass
1)
1)
To equalize pressure and keep the liquid level in the bypass constant with the liquid level in the vessel.
4.3.5 Device orientation
Bypass pipe installation Stillpipe installation
1
2
1
2
Vent Align front or back of device with stillpipe slots
1)
Align front or back of device with
vents
1)
Slots
1)
Horn antenna version shown as example
4.4 Installation instructions
WARNING
Pressure applications
Danger to personnel, system and environment can result from improper installation.
Improper installation may result in loss of process pressure.
Installing/mounting
4.4 Installation instructions
SITRANS LR250 with mA/HART
30 Operating Instructions, 10/2019, A5E32220602-AG