Grundfos DMS 2 Notice D'installation Et D'entretien page 18

6.1 Direct calibration
Before calibration, make sure:
• that the pump is installed with foot valve, injection
valve, etc. in the existing system.
• that the pump is running at the counter pressure it
is supposed to operate at (adjust the counter
pressure valve, if required).
Action
1. Vent the dosing head and the suction hose.
2. Stop the pump. The green LED is flashing.
3. Fill a graduated glass with dosing liquid, Q
DMS 2: approx. 40 ml
DMS 4: approx. 150 ml DMS 12: approx. 250 ml
4. Read and note the quantity Q
5. Place the suction hose in the graduated glass
Q
1
6. Go to the calibration menu, see section 4.5.
7. Press the button twice.
8. The pump is performing 100 dosing strokes.
9. The factory-calibration value appears in the display.
10. Remove the suction hose from the graduated glass
and read Q .
2
11. Set the display value to Q
12. Confirm with the
13. The pump is now calibrated and returns to the
operating display.
18
.
1
DMS 8: approx. 150 ml
.
1
Q
d
Q
2
= Q – Q .
d 1 2
button.
• that the pump is operating with the correct suction
lift.
To carry out a direct calibration, proceed as follows:
Pump display
Set value
to Q
d
Operating display