VEGA VEGABAR 81 4 … 20 mA - Operating Instructions User Manual

Page 34

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34

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

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