VEGA VEGAMET 381 - Manual (Page 25)

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6 Setup with the integrated display and adjustment unit
VEGAMET 381 • 4 … 20 mA signal conditioning instrument
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F E DC
B A 9 8 7 6 5 4
32 1 0
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1 2
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3
7
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2
4
Abb. 14: 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 LC display
Key functions
•
[Function switch] for selection of:
– Adjustment
– Relay switching points
– Indication scaling
– Current output
– Integration time
– Offset correction
– Current input active/passive
•
[+/-] key:
– Change value of the parameters
By pushing the [+/-] key, you change the indivi-
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 are used, each
measurement loop should be clearly labelled.
Switch-on phase
After being switched on, VEGAMET 381 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
•
2: 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)
•
A: Offset correction
•
B: Min. adjustment in percent through
change of the level
•
C: Max. adjustment in percent through
change of the level
•
D: Min. adjustment in mA without changing
the level
•
E: Max. adjustment in mA without changing
the level
•
F: Changeover current input active/passive
Current input active/passive
•
In active mode, VEGAMET 381 provides the
power for the connected sensor. Power sup-