VEGA VEGAPULS 51V…54V - Manual (Page 30)

30 VEGAPULS 51 V … 54 V
4.3 Measurement in standpipe
General instructions
Pipe antennas are an option in vessels which
are mechanically complex or where the
product surface is very turbulent.
By focusing of the radar signal within the
measuring pipe, also products with small
dielectric constants (
ε
r
= 1,6 to 3) can be
reliably measured.
Surge pipes which are open at the bottom
must extend over the full measuring range
(i.e. down to 0% level). Ventilation and surge
holes must be in one axis with the type plate.
Pipe antenna systems in the tank
Type plate
Vent
Surge pipe welded
to the tank Surge pipe in the
socket piece
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
;;;;;;;;;;
Rod antenna with thread on 1 1 /
2
" socket
Rod antenna with thread on 1 1 /
2
" threaded
hole
Alternatively to the socket mounting, the rod
antenna can also be mounted on round
vessel openings (holes). Rod antennas are
available for the following openings: 1
1 /
2
" NPT,
G1 1 /
2
A, DN 50, DN 80, DN100 and DN 150.
Note that the PTFE-rod antenna can only
carry limited mechanical load. When
subjected to lateral power, deformation or
even break will be the cause.
Mounting and installation - Measurement of liquids
< 50 mm or 100 mm
or 250 mm
Reference pane