VEGA VEGABAR 81 4 … 20 mA - Operating Instructions - Manual (Page 34)

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6 Set up with the display and adjustment module
VEGABAR 81 • 4 … 20 mA
45025-EN-131010
required. Corresponding linearization curves are preprogrammed for
these vessels. They represent the correlation between the level per-
centage and vessel volume. The linearization applies to the measured
value indication and the current output.
Caution:
Note the following, if the respective sensor is used as part of an over-
fill protection system according to WHG:
If a linearization curve is selected, the measuring signal is no longer
necessarily linear to the filling height. This must be considered by the
user especially when adjusting the switching point on the limit signal
transmitter.
In the menu items "Current output" you determine the properties of
the current output.
On instrumdents with integrated 2. current output, the properties for
each current output are adjusted individually. The following descrip-
tions apply to both current outputs.
In the menu item "Current output mode" you determine the output
characteristics and reaction of the current output in case of failure.
The default setting is output characteristics 4 … 20 mA, failure mode
< 3.6 mA.
In the menu item "Current output Min./Max.", you determine the reac-
tion of the current output during operation.
The default setting is min. current 3.8 mA and max. current 20.5 mA.
In the menu item "Lock/unlock adjustment", you can protect the
sensor parameters against unauthorized modification. The PIN is
activated/deactivated permanently.
The following adjustment functions are possible without entering the
PIN:
•
Select menu items and show data
•
Read data from the sensor into the display and adjustment mod-
ule.
Setup - Current output
Setup - Current output 1
and 2 (mode)
Setup - Current output 1
and 2 (min./max.)
Lock/release setup - Ad-
justment