VEGA VEGAFLEX 62 4 … 20 mA_HART two-wire - Manual (Page 15)

≥ 300 mm (11 13 /
16
")
150 mm (5 29 /
32
")
150mm (5
29
/ 32
")
1
SW 13
L
Fig. 5: Bow-shaped segment ø 16 mm (0.63 in)
1 Max. filling height
L 150 mm (5.91 in)
P lastic vessel/Glass vessel
T he guided microwave principle requires a metal surface on the
process fitting. Therefore use in plastic vessels etc. an instrument
version with flange (from DN 50) or place a metal sheet (ø > 200 mm/
8
in) beneath the process fitting when screwing it in.
M ake sure that the plate has direct contact with the process fitting.
I n bypass tubes of plastic, a metal screen must be provided on the
outside. You can glue metal foil, for example, on the outside along the
entire length of the tube. This metal screen must be connected to the
ground terminal on the instrument.
W
hen installing rod or cable probes without metal vessel wall, e.g. in
plastic vessels, the measured value can be influenced by strong
electromagnetic fields (emitted interference according to EN 61326:
class A).
I n this case, use a probe in coax version.
Vessel type
VEGAFLEX 62 • 4 … 20 mA/HART two-wire 15
4 M ounting
31837
-
EN
-100426