Grundfos DDI 222 Montage- Und Betriebsanleitung Seite 30

Adjusting the operating counter-pressure without gauging
the dosed volume during calibration
If you do not gauge the dosed volume, you can determine the
"calibration value" from the following dosing capacity curves in
order to adjust your pump to the operating counter-pressure.
The curves represent 200 strokes:
• Dosing medium with a viscosity similar to water
• 0.5 m flooded suction.
V
V
cal
kal
Fig. 31 Dosing capacity curves
Values are approximate values and do not take into
Note consideration deviations due to construction
tolerance according to VDMA 24284.
9.6.1 Flow Monitor
In order for the pressure sensor (if installed) to function as a
dosing controller, the dosing controller must be switched on. See
section 9.10 Flow Monitor .
9.6.2 Pressure control
In the pressure control menu, the pressure control function is
switched on or off and the stop counter-pressure is set. See
section 9.10 Flow Monitor .
9.6.3 Memory function
The memory function is used to store excess contact signals for
processing later. See section 9.6.3 Memory function
• Switch the memory function on/off with "Up" / "Down".
• Press the "Menu/Info" button (confirm the setting and move on
to the next menu item), or
• press the "Start/Stop" button (confirm the setting and close the
second function level).
9.6.4 Weighting of current input/output
In current input/output operation, the dosing capacity is controlled
via the current signal. The pump emits a current signal as a
feedback for control rooms or master/slave applications.
For weighting of current input/output, see also
Note
9.9 Current signal control 0-20 mA / 4-20 mA
9.6.5 Batch menu / batch mode
In batch mode, a defined batch quantity is dosed with a defined
dosing flow. The batch can be dosed manually or by a contact.
See section 9.11 Batch menu / batch mode
9.6.6 Timer menu / timer mode
In timer mode, a defined batch quantity is dosed with a defined
dosing flow and a defined start time. See section
menu / timer mode .
30
3200
[ml]
[ml]
3000
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
0 1 2 3
.
.
.
9.12 Timer
DDI 60 -10
DDI 150 - 4
4 5 6 7 8
p
9 10
p [bar]
[bar]
sys
sys.