VLV55|VLV65 - Volumetric flow controller
TECHNICAL DOCUMENTATION
Setting the operating potentiometers |
Construction subject to change
No return possible
Version: 2017-04-24 | Page 22
SETTING THE OPERATING POTENTIOMETERS
with calculation formulas
Set value for V
max
EW
Vmax
=
V
max
V
nenn
x 100 %
The required volumetric flow that is to flow at the 10 V DC com-
mand signal at terminal 3 (w/Y) or with positive control V
max
is
set in % at the V
max
potentiometer of the controller, the ZTH EU
device or PC-Tool. This value refers to the set
V
nenn
nominal vol-
umetric flow.
Set value for V
min
EW
V
min
=
V
min
V
nenn
V
max
x 100%
The required volumetric flow that is to flow at the 0 V DC com-
mand signal (operating mode 0-10 V DC) or at the 2 V DC driv-
ing signal (operating mode 2 - 10 V DC) at terminal 3 (wY) or
with positive control V
min
is set in % at the V
min
potentiometer
of the controller, the ZTH EU device or PC-Tool. This value re-
fers to the set V
nenn
or V
max
volumetric flow (depending on con-
troller type).
Information regarding the set value V
min
in the following controllers, V
min
refers to V
nenn
:
Product Type
Belimo LMV-D3-MP/LMV-D3-MF
Gruner 227VM-024-05
Calculation of the U
5
voltage value
Operating mode: 2 - 10 V DC:
U
5
=
V
max
V
nenn
x 8V+2V
U
5
=
V
min
V
nenn
x 8V+2V
Operating mode: 0 - 10 V DC:
U
5
=
V
max
V
nenn
x 10V
U
5
=
V
min
V
nenn
x 10V
Calculation of the V
nenn
volumetric flow
V
nenn
= EK x F x 3600
Attention
The V
nenn
value changes as a function of the set calibration curve.
EW (%)
=
Set
value
EK (m/s) = Calibration
curve
U
5
(V DC)
=
U
5
signal
F (m
2
) =
Surface
Actual value measurement feedback signal U
5
: voltme-
ter / PC-Tool
LMV-D3-MP / LMV-D3-MF
Supply voltage: 24 V AC/DC (terminals 1+2)
Measurement output 2 - 10 V DC (terminals 1+5)
Measurement output 0 - 10 V DC (terminals 1+5)
The actual value signal U5 is a real feedback of the volumetric
flow actual value for monitoring and controlling the air
throughput volume.
227VM-024-05
Supply voltage: 24 V AC/DC (terminals 1+2)
Measurement output 2 - 10 V DC (terminals 1+4)
Measurement output 0 - 10 V DC (terminals 1+4)
V
max
values
V
min
values
V
max
values
V
min
values
