VEGA VEGAFLEX 67 (-40…+150°C PFA insulated) 4 … 20 mA_HART two-wire User Manual
Page 28
3
S
ave the settings with [OK].
E
ach product has different reflective properties. In addition, there are
various interfering factors which have to be taken into account:
agitated product surfaces and foam generation (with liquids); dust
generation, material cones and echoes from the vessel wall (with
solids). To adapt the sensor to these different conditions, you should
fi
rst select in this menu item under "Medium" either "Liquid" or "Solid".
A
pplication
Liquid
Standard
(dielectric figure ≥ 2)
D
epending on the dielectric figure (dielectric figure or ε
r
),
measured
products can have a different reflective property. Therefore an
additional selection possibility is available.
U
nder "Sensitivity" you can select "Standard (dielectric figure ≥ 2)" or
"I
ncreased sensitivity (dielectric figure < 2)".
T
hrough this the sensor is optimally adapted to the product and
measurement reliability, particularly in products with poor reflective
properties, is considerably increased.
E
nter the requested parameters via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
T
o suppress fluctuations in the measured value display, e. g. caused
by an agitated product surface, a damping can be set. This time can
be between 0 and 999 seconds. Keep in mind that the reaction time of
the entire measurement will then be longer and the sensor will react to
measured value changes with a delay. In general, a period of a few
seconds is sufficient to smooth the measured value display.
D
amping
0
s
E
nter the requested parameters via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
A
linearisation is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e.g. in a horizontal cylindrical
or spherical tank - and the indication or output of the volume is
required. Corresponding linearisation curves are preprogrammed for
these vessels. They represent the correlation between the level
percentage and vessel volume. By activating the appropriate curve,
the volume percentage of the vessel is displayed correctly. If the
volume should not be displayed in percent but e.g. in l or kg, a scaling
can be also set in the menu item "Display".
Application
Damping
Linearisation curve
28
VEGAFLEX
67 • 4 … 20
mA/HART - two-wire
6 S
et up with the indicating and adjustment module PLICSCOM
32303
-EN
-120329