VEGA VEGAPULS 67 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART four-wire - Manual (Page 21)

be a place where no installations cross the microwave signals. Make
sure when planning your measurement loop that the radar signals
have a "clear view" to the product.
I
n case of existing vessel installations, a false echo storage should be
carried out during setup.
I f large vessel installations such as struts or supports cause false
echoes, these can be attenuated through supplementary measures.
S
mall, inclined sheet metal baffles above the installations scatter the
radar signals and prevent direct interfering reflections.
Fig. 15: Cover smooth profiles with deflectors
A ir rinsing is useful for avoiding buildup, particularly when there is
strong condensation. Since VEGAPULS 67 has no direct rinsing air
connection, a separate rinsing air connection must be provided in the
mounting socket. By inclining this connection towards the top, a
particularly effective cleaning of the antenna cover is achieved.
Fig. 16: Purging air connection
L arge material heaps are best measured with several instruments,
which can be mounted on e.g. traverse cranes. For this type of
application it is advantageous to orient the sensor perpendicular to the
bulk solid surface.
T he sensors do not influence each other.
Information:
K
eep in mind that for these applications, the sensors are designed for
relatively slow level changes. If the sensor is used on a movable boom,
Air rinsing
Material heaps
VEGAPULS 67 • 4 … 20 mA/HART four-wire 21
4 M ounting
32939
-EN
-100514