VEGA VEGAMET 381 - Manual (Page 27)

27
6 Setup with the integrated display and adjustment unit
VEGAMET 381 • 4 … 20 mA signal conditioning instrument
27567-01-131025
2
1
3
off (on)
on (off)
o n
o n
o f f
o f f
t
L E D
Abb. 15: Relay modes
1 Filling height
2 Mode overfill protection
3 Mode dry run protection
Scaling
Scaling means converting the measured value
into a certain parameter and unit. The indication
can then show the volume in litres e.g., instead
of the percentage value. Indication values from
-9999 to +9999 are possible.
1. First of all, determine the max. indicating
range and the number of decimal places
after the decimal point -- max. four decimal
places can be displayed. Select position [
5 ] of the function switch, place the decimal
point in the required position and save your
settings.
2. Now select position [6] or [7] on the function
switch, enter the requested values for
100 % or 0 % and save your settings.
Damping
To suppress fluctuations in the measured value
display, e.g. caused by an agitated product sur-
face, an integration time can be set. This time
can be between 0 and 250 seconds. Remember
that the reaction time of the entire measurement
will then be longer and the sensor will react
to measured value changes with a delay. In
general, a period of a few seconds is sufficient
to smooth the measured value display.
→
Now select position [9] on the function
switch, enter the requested value and save
your settings
Current output 0/4 … 20 mA
The characteristics of the current output can be
switched over from 4 … 20 mA to 0 … 20 mA.
→
Now select position [8] on the function
switch, adjust the requested characteristics
curve and save your settings
Simulation
To check if the settings ofVEGAMET 381 are
correct, the simulation mode can be used. Any
individual measured value can be simulated
and e.g. the correct behaviour of the relays and
the connected instruments can be checked.
Switching over between the functions "OPERA-
TE" and "Simulation" is done by pushing the [+/-
] keys for at least 3 seconds. In the simulation
mode, the set value flashes on the display. The
simulation can be switched off by pushing both
keys again for approx. 3 seconds. If no key is
pushed, the display switches automatically over
to "OPERATE" after approx. 60 minutes and the
simulation is terminated.
→
To start simulation, push the [ +/-] keys si-
multaneously until the displayed value starts
flashing (approx. 3 seconds). By pushing
either of the [ +/-] keys, you can set the
requested simulation value and carry out
your check.
Reset
With a reset, all values set by the user will be
lost and are reset to factory settings.
→
Interrupt the power supply of VEGAMET
381. Push the [+/-] keys simultaneously and
hold them while you switch on the power
supply. The display shows "RES" and the
default settings will be restored. These are
the following:
•
Relay switch on points: 10 %
•
Relay switch off points: 100 %
•
Decimal point: 888.8
•
Display min.: 0
•
Display max.: 100.0
•
Integration time: 0 s
•
Offset correction: 0
•
Current output: 4 … 20 mA
•
Min. adjustment: 0 % or 4 mA
•
Max. adjustment: 100 % or 20 mA