13
Functions
DME and DMS
Operating modes
Manual control
The pump is dosing constantly according to the quantity
set in l/h or ml/h by means of the buttons and .
It automatically changes over between the measuring
units.
Setting range, DME:
The figures in brackets indicate the maximum
capacity when the anti-cavitation function is activated.
See page 15 for adjusted DME 60 to 940 capacities.
Setting range, DMS:
Pulse control
Applies to DME and DMS-A.
The pump is dosing according to an external pulse
signal, e.g. from a water meter.
There is no direct relation between pulses and dosing
strokes. The pump automatically calculates its optimal
speed to ensure the required quantity is dosed for each
pulse. The quantity to be dosed is set in ml/pulse. The
pump adjusts its speed and/or stroke frequency
according to two factors:
• frequency of external pulses and
• the set quantity per pulse.
Setting range, DME:
DME 2-18: 0.000023 ml/pulse - 5.0 ml/pulse
DME 8-10: 0.000069 ml/pulse - 15.0 ml/pulse
DME 12-6: 0.000111 ml/pulse - 24.0 ml/pulse
DME 19-6: 0.000204 ml/pulse - 37.0 ml/pulse
DME 48-3: 0.000530 ml/pulse - 96.0 ml/pulse
DME 60-10: 0.000625 ml/pulse - 120 ml/pulse
DME 150-4: 0.00156 ml/pulse - 300 ml/pulse
DME 375-10: 0.00392 ml/pulse - 750 ml/pulse
DME 940-4: 0.00980 ml/pulse - 1880 ml/pulse.
Setting range, DMS:
DMS 2: 0.00232 ml/pulse - 50 ml/pulse
DMS 4: 0.00370 ml/pulse - 80 ml/pulse
DMS 8: 0.00695 ml/pulse - 150 ml/pulse
DMS 12: 0.01110 ml/pulse - 240 ml/pulse
Analog 4-20 mA control
Applies to DME and DMS-A
The pump is dosing according to an external analog
signal. The dosed capacity is proportional to the input
value in mA.
4-20 (default): 4 mA = 0%
20 mA = 100%
20-4: 4 mA = 100%
20 mA = 0%
0-20: 0 mA = 0%
20 mA = 100%
20-0: 0 mA = 100%
20 mA = 0%.
The maximum capacity limitation, see page 15, will
influence the capacity. 100% (20 mA) corresponds to
the maximum capacity or the set capacity limitation.
DME
Adjustable Flow Range
GPH to GPH ml/h to l/h
2-18 0.00066 -
0.66
(0.47*)
2.5 -
2.5
(1.8*)
8-10 0.002 -
1.98
(1.47*)
7.5 -
7.5
(5.6*)
12-6 0.0032 -
3.17
(2.37*)
12 -
12
(9*)
19-6 0.0049 -
4.88
(3.83*)
18.5 -
18.5
(14.5*)
48-3 0.0127 -
12.68
(9.77*)
48 -
48
(37*)
60-10 0.0198 - 15.85 75 - 60
150-4 0.0495 - 39.63 187.5 - 150
375-10 0.1238 - 99.06 468.75 - 375
940-4 0.3104 - 248.32 1175 - 940
DMS
Adjustable Flow Range
GPH to GPH ml/h to l/h
2 0.0066 - 0.66 2.5 - 2.5
4 0.0105 - 1.05 40 - 4
8 0.0198 - 1.98 75 - 7.5
12 0.0317 - 3.17 120 - 12
TM01 8218 0100
0 4 8 12 16 20
0
20
40
60
80
100
4-20 mA signal
Maximum capacity [%]
Input signal [mA]
4-20 mA signal
Dm123.book Page 13 Tuesday, February 8, 2005 8:24 AM