VEGA VEGAFLEX 65 4 … 20 mA_HART four-wire - Manual (Page 22)

6 .4 Setup steps
A fter connecting VEGAFLEX 65 to power supply or after a voltage
recurrence, the instrument carries out a self-check for approx. 30
seconds:
l I nternal check of the electronics
l I ndication of the instrument type, the firmware as well as the
sensor TAGs (sensor designation)
l O utput signal jumps briefly (approx. 10 seconds) to the set fault
current
T hen the corresponding current is outputted to the cable (the value
corresponds to the actual level as well as the settings already carried
out, e.g. factory setting).
I n HART-Multidrop mode (several sensors on one input) the address
must be set before continuing with the parameter adjustment. You will
fi
nd a detailed description in the operating instructions manual
"I ndicating and adjustment module" or in the online help of PACTware
or DTM.
HART mode
Standard
Address 0
A s VEGAFLEX 65 is a distance measuring instrument, the distance
from the sensor to the product surface is measured. To have the real
product level displayed, an allocation of the measured distance to the
percentage height must be made. To carry out this adjustment, the
distance is entered with full and empty vessel. If these values are not
known, an adjustment with the distance values, e.g. 10 % and 90 % is
also possible. Starting point for these distance specifications is always
the seal surface of the thread or flange. With these settings, the real
level is calculated. Furthermore the operating range of the sensor is
limited from maximum to the required range.
T he real product level during this adjustment is not important, because
the min./max. adjustment is always carried out without changing the
product level. These settings can be made ahead of time without the
instrument having to be installed.
I n the main menu item "Basic adjustment", the individual submenu
items should be selected one after the other and provided with the
correct parameter values.
Caution:
I
f there is a separation of different liquids in the vessel, e.g. by
condensation, VEGAFLEX 65 will always detect the medium with the
higher dielectric figure (ε
r
).
K eep in mind that interfaces can cause faulty measurements.
Switch-on phase
Address setting HART-
Multidrop
Parameter adjustment
22 VEGAFLEX 65 • 4 … 20 mA/HART - four-wire
6 S et up with the indicating and adjustment module PLICSCOM
31846
-EN
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