Vega VEGASON 61 Operating Instructions Manual page 34

6 Set up with the display and adjustment module PLICSCOM
Service - Extended set-
ting
Service - Current output
Service - Simulation
34
The menu item " Extended setting" offers the possibility to optimise
VEGASON 61 for applications in which the level changes very quickly.
To do this, select the function " Quick level change > 1 m/min.".
Extended setting
quick level change > 1 m/min.
Note:
Since with the function " Quick level change > 1 m/min." the genera-
tion of an average value of the signal processing is considerably
reduced, false reflections by agitators or vessel installations can
cause measured value fluctuations. A false signal suppression is thus
recommended.
In the menu item " Current output" you determine the behaviour of the
current output during operation and in case of failure. The following
options are available:
Current output
Characteristics
Failure mode
1)
Min. current
2)
Max. current
3)
The values in bold font represent the data of the factory setting.
In HART multidrop mode, the current is constantly 4 mA. This value
does not change even in case of failure.
Current output
►
Characteristic: 4-20 mA
►
Failure mode: 22 mA
►
Min. current 3.8 mA
In this menu item you simulate a user-defined level or pressure value
via the current output. This allows you to test the signal path, e.g.
through connected indicating instruments or the input card of the
control system.
The following simulation variables are available:
Value of the current output in case of failure, e.g. if no valid measured value is
1)
delivered.
This value is not underrun during operation.
2)
This value is not exceeded during operation.
3)
4 ... 20 mA
20 ... 4 mA
Hold value
20.5 mA
22 mA
< 3.6 mA
3.8 mA
4 mA
20 mA
20.5 mA
VEGASON 61 • Four-wire 4 ... 20 mA/HART