Setup With The Integrated Indicating And Adjustment Unit; Adjustment System; Setup Procedure - Vega VEGAMET 381 Ex Instrucción De Servicio

Setup with the integrated indicating and adjustment unit

Information:
Via the slide switch on the rear of the
instrument you can switch over between
active and passive operation of the meas-
uring data input:
In active mode, VEGAMET 381 Ex provides
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the power for the connected sensors. Power
supply and measurement data are transmitted
over the same two-wire cable. This mode is
provided for connection of measuring trans-
ducers without separate power supply (sen-
sors in two-wire version).
In passive mode the sensors are not powered,
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only the measured value is transmitted. This
input is for connection of transmitters with own,
separate voltage supply (sensors in four-wire
version). The VEGAMET 381 Ex can be also
connected into the existing circuit like a normal
current meter.
The position of the slide switch also
influences the preconditions for Ex imple-
mentation. Take note of the type approval
certificate or the conformity certificate of-
VEGAMET 381 Ex.
For parameter adjustment of connected
HART sensors, the sockets are integrated
in the terminals of the meas. data input. A
VEGACONNECT can be directly plugged in
without the need of an additional HART
resistor.
6 Setup with the integrated
indicating and adjustment
unit

6.1 Adjustment system

The integrated indicating and adjustment unit is for
measured value display, adjustment and diagnosis
ofVEGAMET 381 Ex. Indication and adjustment is
carried out in the front via a clear LC-display and a
function switch as well as two keys.
To open the cover, insert a screwdriver in the two
slots on the top and turn it slightly.
24
Tip:
1 2
8
7
6
Fig. 14: Indicating and adjustment elements
1
Status indication operating relay 1 and 2
2
Status indication fail safe relay
3
Status indication operation
4
[+/-] adjustment keys
5
Insertable tag for identification of the measurement loop
6
Function switch
7
Mode switch for sensor input (active/passive) on the rear of the
instrument
8
LC display
Key functions
[Function switch] for selection of:
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- Adjustment
- Relay switching points
- Indication scaling
- Current output
- Integration time
-
Offset correction
[+/-] key:
l
-
Change value of the parameter
By pushing the [+/-] key, you change the individual
parameters of the selected function. In this phase,
the processed parameter is flashing. By briefly
pushing the two keys simultaneously, you save
your settings. "Save" is briefly displayed.

6.2 Setup procedure

Setup
The setup comprises first of all the adjustment of
the measurement loop. A scaling of the measured
value for the LC display and the adaptation of the
relay switching points are further settings. Addi-
tional setup steps would be, if necessary, the
1
2
3
+
-
4
5
VEGAMET 381 Ex