Vega VEGAMET 391, Руководство по эксплуатации, Страница: 49 / 68

100% 0,80m (d)
=
400m
3
/h
=
0% 1,40m (d)
=
0m
3
/h
=
F ig . 15 : A djustment fl ow measurement with V - notch
S
elect in the
DTM
window
" L inearization "
the option
" F low "
and then
the used
fl
ume
(
in the above example
V -
notch
).
S
elect in the
DTM
window
"
S caling
"
under
"
P arameter
"
the option
"
F
low "
. F
inally the allocation of a value must be carried out
,
i
.
e
.
the
fl
ow
volume is assigned to the
0
and
100
%
value
. A
s the last step
,
select
the requested meas
.
unit
. F
or above example
:
0
% =
0
and
100
% =
400
,
meas
.
unit m
³
/
h
.
F
irst of all decide if you want to use a relay and
/
or a current output
. I
n
the
DTM
window
"
O utputs
"
you can use any of the three outputs as
long as these are not yet used for other tasks
.
F
inally select under
" M ode " (
relay
)
or
" O utput characteristics " (
current
output
)
the option
" F low volume pulse "
or
" S ampling pulse " . E
nter
under
" P ulse output all "
the
fl
ow volume after which a pulse should be
outputted
(
e
.
g
.
400
m
³
corresponds to one pulse per hour with a
fl
ow
volume of
400
m
³
/
h
).
I
n mode
"
S
ampling pulse "
an additional pulse is outputted after a
de
fi
ned time
. T
his means that a timer is started after each pulse after
which another pulse is outputted
. T
his applies only if already a pulse
was outputted after exceeding the
fl
ow volume
.
D
ue to sludge at the bottom of the
fl
ume
,
it can happen that the min
.
adjustment originally carried out can no longer be reached
. T
herefore
small quantities will continuously enter the
fl
ow volume detection
despite the
"
empty
"
fl
ume
. T
he option
"
M in . fl ow volume suppression
"
o
ff
ers the possibility to suppress measured
fl
ow volumes below a
certain percentage value for the
fl
ow volume detection
.
I
f a
fl
ow measurement is set up
,
the
fl
ow value can also be summed up
and displayed as
fl
ow volume
. T
he graph can be selected in the menu
item
"
D isplay
"
. T
he following parameters must be adjusted for the
totalizer
:
l
M
easuring unit
: S
election of the unit by which the totalizer adds
.
l
I
ndicating format
: S
election of the indicating format
(
number of
decimal positions of the counter
)
L inearisation curve
S caling
O utputs
T otalizer
VEGAMET
391
•
4
…
20
m
A / HART
signal conditioning instrument
49
8
A
pplication examples
36032
-
EN
-
091116