9.4
Pressure control, Air velocity control (PI-Controller)
4.01
9.4.1
Setting for operation as Pressure and air velocity controller
%
set
0
100
R4
08.02.2008
v_set_pxet.VSD
potentiometer inside
(DIP 2 = OFF)
or
26.05.2008
v_pxet_q_aussen
_pot.VSD
potentiometer outside
(DIP 2 = ON)
set
Setpoint setting alternatively by
“
potentiometer inside
”
(DIP 2 =
|
OFF
|
) or
“
potenti-
ometer outside
”
(DIP 2 =
|
ON
|
)
For
control with active sensors (0 - 10 V, 4 - 20 mA)
Setting range: 0 - 100 %
measuring range of sensor
The enclosed scale for type DSG.. pressure sensors can be attached above
the potentiometer. Example for DSG 200:
28.05.2008
v_pxet_q_skala_dsg200.VSD
set [% ]
0
10
20
30
40
50
60
70
80
90
100
[Pa]
0.0
20
40
60
80
100
120
140
160
180
200
The enclosed scale for a type MAL.. air speed sensor can be attached
above the potentiometer. Example for MAL1:
28.05.2008
v_pxet_q_skala_mal1.VSD
set [% ]
0
10
20
30
40
50
60
70
80
90
100
[m/s]
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
20.03.2008
v_pand_pxet.VSD
R5
%
Pband
5
30
Pband
Pband
Narrow control range = Short control times
Wide control range = Longer control times and more stable control
For
control with active sensors (0 - 10 V, 4 - 20 mA)
Setting range: 5 - 30 %
0 - 100 % measuring range of sensor
08.02.2008
v_nmin_pxet.VSD
%
n-min
0
100
R6
n-min
Minimum output voltage (basic speed)
Setting range: 0 - 100 % (
“
n-min
”
takes priority if over
“
n-max
”
)
08.02.2008
v_nmax_pxet.VSD
%
n-max
0
100
R
7
n-max
Maximal output voltage (speed limiter)
Setting range: 100 % -
“
n-min
”
9.4.2
Example: Pressure control for ventilation systems
Pressure sensor
•
Type DSG200
•
Measuring range 0 - 200 Pa
•
Output signal 0...10 V
Settings:
•
set
= 50 % 100 Pa
9.4.3
Example: Air velocity control for clean rooms
Air velocity sensor
•
Type MAL1
•
Measuring range 0 - 1 m/s
•
Output signal 0...10 V
Settings:
•
set
= 50 % 0.5 m/s
Operating Instructions
RETP6 / RETP10
Setting for operation
L-BAL-E082-GB 1237 Index 002
Part.-No. 00163339-GB
24/31
