Grundfos DME 2 Product Manual page 14

Functions
Timer-based batch control
Applies to DME
The pump is dosing the set quantity in batches at
maximum capacity or the set capacity limitation.
The time until the first dosing (NX) and the following
sequences (IN) can be set in minutes, hours and days.
The maximum time limit is 9 days, 23 hours and 59
minutes (9:23:59).
The lowest acceptable value is one minute. IN must be
higher than the time required to perform one batch. If IN
is lower than the time required, the next batch will be
ignored. In case of supply failure, the set dosing quan-
tity, the IN time and the remaining NX time are stored.
When the supply is reconnected, the pump will start up
with the NX time at the time of the supply failure. This
way the timer cycle will continue, but it will be delayed
according to the time of the supply failure. This feature
is not available on variant "B" pumps.
Quantity pr. batch
NX
IN
Pulse-based batch control
Applies to DME
The pump is dosing the set quantity in batches at
maximum capacity or the set capacity limitation. The
quantity is dosed every time the pump receives an
external pulse. If the pump receives new pulses before
the batch is completed, these pulses will be ignored.
However the manually control DME B cannot be
controlled externally.
14
Setting range (applies to DME only)
Timer-based and pulse-based batch control
0.23 ml/batch
DME 2:
0.00006 G/batch
0.69 ml/batch
DME 8:
0.00018 G/batch
1.11 ml/batch
DME 12:
0.00029 G/batch
2.04 ml/batch
DME 19:
0.00053 G/batch
5.3 ml/batch
DME 48:
0.0014 G/batch
6.25 ml/batch
DME 60:
0.0017 G/batch
15.6 ml/batch
DME 150:
0.0041 G/batch
39.1 ml/batch
DME 375:
0.01 G/batch
97.9 ml/batch
DME 940:
0.025 G/batch
Quantity pr. batch
Pulse
Anti-cavitation (2 to 48)
Applies to DME
When this function is selected, the pump extends and
smooths its suction stroke, resulting in softer priming.
The anti-cavitation function is used:
• when pumping liquids of high viscosity
• when pumping degassing liquids
• in the case of a long suction tube and
• in the case of a high suction lift.
The maximum capacity is reduced when this function is
selected, see table below.
Maximum capacity with anti-cavitation function
DME 2 0.475 GPH
DME 8 1.48 GPH
DME 12 2.38 GPH
DME 19 14.5 GPH
DME 48 9.77 GPH
DME and DMS
:
to 5 l/batch
to 1.32 G/batch
to 15 l/batch
to 3.96 G/batch
to 24 l/batch
to 6.34 G/batch
to 37 l/batch
to 9.77 G/batch
to 96 l/batch
to 25.4 G/batch
to 120 l/batch
to 31.7 G/batch
to 300 l/batch
to 79.3 G/batch
to 750 l/batch
to 198.1 G/batch
to 1880 l/batch.
to 496.7 G/batch
t
Pulse
1.8 l/h
5.6 l/h
9 l/h
14.5 l/h
37 l/h