Vega VEGABAR 86 Operating Instructions Manual page 31

Lock/Unlock adjustment
Language
VEGABAR 86 • Modbus and Levelmaster protocol
6 Set up the sensor with the display and adjustment module
With flow measurement and selection " Linear" display and output
(percentage/current) are linear to " Differential pressure". This can
be used, for example, to feed a flow computer.
With flow measurement and selection " Extraction by root"display and
output (percentage/current) are linear to " Flow".
With flow in two directions (bidirectional) a negative differential pres-
sure is also possible. This must already be taken into account in menu
item " Min. adjustment flow".
Caution:
Note the following, if the respective sensor is used as part of an over-
fill protection system according to WHG:
If a linearisation curve is selected, the measuring signal is no longer
necessarily linear to the filling height. This must be considered by the
user especially when setting the switching point on the limit signal
transmitter.
In the menu item " Lock/unlock adjustment" you safeguard the sensor
parameters against unauthorized or unintentional modifications.
This is done by entering a four-digit PIN.
With active PIN, only the following adjustment functions are possible
without entering a PIN:
•
Select menu items and show data
•
Read data from the sensor into the display and adjustment module
Releasing the sensor adjustment is also possible in any menu item by
entering the PIN.
Caution:
With active PIN, adjustment via PACTware/DTM and other systems is
also blocked.
6.5.2 Display
This menu item enables the setting of the requested national lan-
guage.
The device assumes an approximately constant temperature and static
2)
pressure and converts the differential pressure into the flow rate via the
characteristic curve extracted by root.
2)
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