
T
he signal conditioning instrument can process the
VEGAMET
391
can process measured values from
4
…
20
m
A
/
HART
sensors via
analogue communication as well as via digital
HART
protocol
.
A
nalogue
4
…
20
m
A
transmission
I
n the standard setting of
VEGAMET
391
the measured value
transmission is carried out via analogue
4
…
20
signal
.
A
n adjustment
in the sensor in
fl
uences directly the input variable of
VEGAMET
391
.
O
nly carry out the adjustment on one instrument
,
either on
VEGAMET
391
or on the sensor
.
T
he adjustment in
VEGAMET
391
is always
carried out in m
A
(
analogue transmission
).
D
igital
HART
transmission
F
or transmission via
HART
,
VEGAMET
391
must be informed which
sensor value should be used for further processing
.
D
epending on the
sensor type
,
this can be distance
,
pressure or temperature
.
W
ith all
HART
sensors
,
always the unchanged initial value of the sensor is
transmitted to
VEGAMET
391
.
T
hus
,
the adjustment must always
carried out on
VEGAMET
391
,
never on the sensor
.
D
i
ff
erent
parameters and meas
.
units are available
.
W
hen
HART
sensors from other manufacturers are connected
,
the
options
PV
(
P
rimary
V
alue
)
and
SV
(
S
econdary
V
alue
)
are available
.
T
he prerequisite for this is the support of the
HART
commands
0
,
1
,
3
,
and
15
.
T
his information and which measured values are transmitted
can be found in the operating instructions manual of the respective
sensor manufacturer
.
C
arry out your settings via the respective keys and save with
[
OK
]
.
T
he measured variable de
fi
nes the applicaton of the measurement
loop
,
the following settings are available depending on the connected
sensor
:
l
L
evel
l
P
rocess pressure
l
U
niversal
l
T
emperature
l
I
nterface
l
F
low
(
only after activating via
PACT
ware or
DTM
)
C
arry out your settings via the respective keys and save with
[
OK
]
.
M
easurement loop
-
I
n
-
put
M
eas
.
loop
-
P
arameter
VEGAMET
391
•
4
…
20
m
A
/
HART
signal conditioning instrument
21
6
S
etup with the integrated indicating and adjustment unit
36032
-
EN
-
091116