English (GB)
18
6. Operationh
6.1 Description of the device
Fig. 24
Dosing regulator with servomotor and manual dosing
regulator
6.2 Automatic adjustment of the dosing flow
6.2.1 Switching from automatic to manual adjustment of the
dosing flow; only with option servomotor
• Switch off automatic control.
• Push the coupling (1) upwards.
• Move the retention pin (2) through the coupling, until it cannot
move down any longer.
• Now the dosing flow can be adjusted by hand.
--> The servomotor is disconnected from the rate valve.
Fig. 25
Disconnect to servomotor
6.2.2 Switching from manual to automatic adjustment of the
dosing flow; only with option servomotor
• Move back the retention pin (2).
– Now the coupling (1) falls down.
• Turn the adjustment knob (3), until the coupling snaps in.
--> Now the servomotor is connected to the rate valve.
Fig. 26
Conect to servomotor
6.3 Adjusting the Dosing Flow
6.3.1 Increasing the dosing flow
Fig. 27
Increasing the dosing flow
• Turn the adjustment knob of the rate valve
slowly
to the right.
TM
04
07
50
09
08
Item Component
Description
1
Rate valve
For manual adjustment of the
desired gas flow.
2
Measuring tube
It displays the actual gas flow.
3
Connection for the
vacuum line from the
vacuum regulator
For the injection point
4
Connection for the
vacuum line to the
injector
For the injection point
optional:
Differential pressure
regulator (not visible)
It keeps the difference of the
pressures before and after the
rate valve on a constant value.
The adjusted dosing flow stays
constant even when the injector
vacuum varies.
5
Only for VGA-113
with servomotor
For automatic adjustment of the
desired gas flow.
Caution
The rate valve is not a perfectly closing shut-off
valve!
Note
Only with option servomotor!
In case of automatic adjustment of the dosing flow,
no adjustment can be made at the dosing unit. All
adjustment has to be made at the control device.
Observe the manual of the control device!
1
2
4
3
5
1
2
4
3
TM
04
0
752
09
08
TM
04
07
53
09
08
TM
04
07
54
09
08
Caution
Do not screw out the adjustment knob. Do not
continue turning the knob when maximum dosing
flow is reached.
1
2
3
2
1
