Setup With The Integrated Display And Adjustment Unit; Adjustment System; Setup Steps - VEGA VEGAMET 381 Ex Betriebsanleitung

6 Setup with the integrated
display and adjustment
unit
6.1

Adjustment system

The integrated display 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.
1 2
8
7
6
Abb. 16: Display 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 measure-
ment 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:
– Adjustment
– Relay switching points
– Indication scaling
– Current output
– Integration time
– Offset correction
•
[+/-] key:
– Change value of the parameters
By pushing the [+/-] key, you change the indivi-
VEGAMET 381 Ex • 4 ... 20 mA signal conditioning instrument
1
2
3
+
-
4
5

6 Setup with the integrated display and adjustment unit

dual 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 steps

Setup
Setup comprises mainly 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.
Additional setup steps would be, if necessary,
setting an integration time (damping) to steady
the measured value or modifying the current
output characteristics.
To clearly denote the measuring unit, the
supplied labels can be inserted in the cover. In
case several VEGAMET 381 Ex are used, each
measurement loop should be clearly labelled.
Switch-on phase
After being switched on, VEGAMET 381 Ex
first of all carries out a short self-check. The
following steps are carried out:
•
Internal check of the electronics
•
Indication of the firmware version
•
The output signal jumps briefly to the set
fault value
Then the actual measured value is displayed
and the corresponding current is transmitted to
the current output.
Measured value indication
The measured value indication shows the digital
indication value and also an analogue bargraph.
Here, it is absolutely necessary that the function
switch is set to position [ 0] ("OPERATE").
Function switch
The following functions can be selected via the
rotary switch:
•
0: Measured value display and simulation
•
1: Relay 1 switching point ON
•
2: Relay 1 switching point OFF
•
3: Relay 2 switching point ON
•
4: Relay 2 switching point OFF
•
5: Decimal point position of the scaling
•
6: Scaling for 100 %
•
7: Scaling for 0 %
•
8: Switch over current output 0/4 ... 20 mA
•
9: Damping of the measured value (integra-
tion time)
27