Vega Capacitive electrodes EL 4 … 20 mA - Compact Bedienungsanleitung PDF herunterladen (Seite 30)

30 Capacitive electrodes EL 4 … 20 mA - Compact

22652-EN-020809

4.3 Adjustment with VVO

If oscillator CAP E 32 H Ex is installed, the

electrode can also be adjusted via a PC with

adjustment software VVO (from version 2.30).

VVO recognises automatically the type of the

connected sensor and immediately afterwards

indicates with which sensor a connection

exists.

If you get no sensor connection, please check

the following:

- the supply voltage must be at least 12 V.

- If VEGACONNECT 2 is connected directly

to the sensor cable, the load resistance

must be 250 ... 350 Ohm.

- You have to use a VEGACONNECT 2. Older

versions of VEGACONNECT are not com-

patible.

For further information, see the operating

instructions manual of the adjustment program

VEGA Visual Operating (VVO).

Setup

Note

If the resistance of the supply voltage is less

than 250 Ohm, a resistance must be con-

nected to the signal/connection cable during

adjustment. The digital adjustment and com-

munication signals would otherwise be short-

circuited by insufficient resistance, e.g. of the

supply current source or the processing

system, resulting in possible failure of sensor

communication. The easiest way is to connect

the necessary adjustment resistance in paral-

lel to the connection socket of the HART

®

handheld (see 4.4 Adjustment with the HART

®

handheld).

• Switch on the power supply of the con-

nected sensor.

• Start the adjustment software VVO (VEGA

Visual Operating) on your PC.

• In the initial window you choose with the

arrow keys or the mouse the item

Planning

and click to

OK

.

Planning

should only be selected if you are

authorised to modify instrument parameters.

Otherwise select

Operator

or

“Mainte-

nance”

.

In the window User identification you are

asked for the name and the password.

• For setup (

Planning

) you enter under name:

VEGA

and under password also:

VEGA

.

You can use capital or small letters.

4

3

2

1

+ - + -

PC with VVO

mA

approx.

250 Ohm

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