VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART two-wire User Manual
Page 37
Caution:
N
ote the following, if VEGAPULS 66 is used as part of an overfill
protection system according to WHG:
I
f a linearisation curve is selected, the measuring signal is no longer
compulsorily linear proportional to the level. This must be taken into
consideration by the user, particularly when adjusting the switching
point on the level switch.
I
n this menu item you can enter an unambiguous designation for the
sensor, e.g. the measurement loop name or the tank or product
designation. In digital systems and in the documentation of larger
plants, a singular designation should be entered for exact identification
of individual measuring sites.
S
ensor-TAG
Sensor
W
ith this menu item, the Basic adjustment is finished and you can now
jump to the main menu with the [ESC] key.
H
igh sockets or vessel installations, such as e. g. struts or agitators as
well as buildup and weld joints on the vessel walls cause interfering
reflections which can impair the measurement. A false echo storage
detects and marks these false echoes, so that they are no longer taken
into account for the level measurement. A false echo memory should
be created with low level so that all potential interfering reflections will
be detected.
G
ating out of false signals
C
hange now?
P
roceed as follows:
1
M
ove from the measured value display to the main menu by
pushing [OK].
2
S
elect the menu item "Service" with [->] and confirm with [OK].
N
ow the menu item "False signal suppression" is displayed.
3
C
onfirm "False signal suppression - Change now" with [OK] and
select in the below menu "Create new". Enter the actual distance
from the sensor to the product surface. All false signals in this area
are detected by the sensor and saved after confirming with [OK].
Note:
C
heck the distance to the product surface, because if an incorrect (too
large) value is entered, the existing level will be saved as false signal.
T
he filling level would then no longer be detectable in this area.
Sensor-TAG
Gating out of false sig-
nals
VEGAPULS
66 • 4 … 20
mA/HART two-wire
37
6 S
et up with the indicating and adjustment module PLICSCOM
28438
-EN
-090305