30
Capacitive electrodes EL 4 … 20 mA - compact
4.3 Adjustment with VVO
When an oscillator CAP E 32 H Ex is mounted,
the electrode can be also adjusted via a PC
with adjustment software VVO (from version
2.30).
VVO determines automatically the kind of the
connected sensor and shows a little later to
which sensor the connection exists.
When you get no sensor connection, check the
following:
- The supply voltage must be at least 20 V.
- When VEGACONNECT 2 is directly
connected to the sensor line, the load resistor
must be 250 ... 350 Ohm.
- You have to use a VEGACONNECT 2. Older
versions of VEGACONNECT are not
compatible.
The following adjustment steps are described in
their sequence and should be carried out in this
sequence with the initial set-up.
Further information are stated in the operating
instruction of the adjustment program VEGA
Visual Operating (VVO).
Configuration
Display Diagnostics
Instrument data
Configuration Services
Quit
Help
Measuring system
Measurement loop >
Program
>
Language
User access
Communication
Under the menu point Configuration you can
choose the following functions:
• Measuring system
• Measurement loop
• Program
The electrode is preadjusted by VEGA. The
measuring system must only be re-configured
when the oscillator is exchanged.
Set-up
Note
When the resistance of the voltage supply is
less than 250
Ω
, a resistor must be looped into
the signal/connection line during adjustment.
The digital adjustment and communication
signals would be shortcircuited via too small
resistors e.g. of the supply current source or the
processing system so that the sensor
communication would not be ensured. The
easiest way would be to connect the required
adjustment resistor in parallel to the connection
sockets of the HART®-handheld (see fig. 1).
• Switch on the power supply of the connected
sensor.
• Start the adjustment software VVO (VEGA
Visual Operating) on your PC.
• In the entrance window you choose with the
arrow keys or the mouse the point
Planning
and click to
OK
.
You should only choose
Planning
when you
are authorized to modify instrument
parameters. Otherwise choose
Operator
or
Maintenance
.
In the window User identification you are
asked for the name and the password.
• For set-up (
planning
) enter under name:
VEGA
and under password again:
VEGA
. It
does not matter if you use capital or small
letters.
4
3
2
1
+ - + -
PC with VVO
mA
approx.
250
Ω
