En
gl
is
h (
G
B)
26
7.4.2
Pulse
In this operation mode, the pump doses the
set dosing volume for each incoming (potential-free)
pulse, e.g. from a water meter. The pump
automatically calculates the optimum stroke
frequency for dosing the set volume per pulse.
The calculation is based on:
•
the frequency of external pulses
•
the set dosing volume/pulse.
Fig. 19
Pulse
mode
The dosing volume per pulse is set in ml/pulse in the
"
Operation
" menu using the click wheel. The setting
range for the dosing volume depends on the pump
type:
The frequency of incoming pulses is multiplied by the
set dosing volume. If the pump receives more pulses
than it can process at the maximum dosing flow, it
runs at the maximum stroke frequency in continuous
operation. Excess pulses will be ignored if the
memory function is not enabled.
Memory function
When the "
Setup
>
Pulse memory
" function is
enabled, up to 65,000 unprocessed pulses can be
saved for subsequent processing.
The contents of the memory will be deleted by:
•
Switching off the power supply
•
Changing the operation mode
•
Interruption (e.g. alarm,
External stop
).
7.4.3 Analog 0/4-20 mA
In this operation mode, the pump doses
according to the external analog signal. The
dosing volume is proportional to the signal input
value in mA.
If the input value exceeds 22 mA, an alarm is
displayed and the pump stops dosing. If the input
value in operation mode 4-20 mA falls below 2 mA,
an alarm is displayed and the pump stops dosing.
The "
Sensor signal
" alarm symbol is displayed in the
"Signal and error display" area of the display.
Fig. 20
Analog scaling
Fig. 21
Analog operation mode
TM
06 707
8 291
6
Type
Setting range [ml/pulse]
DDA 60-10
0.0111 - 111
DDA 120-7
0.0232 - 232
DDA 200-4
0.0386 - 386
Subsequent processing of saved pulses
can cause local increase in concentration!
Operation
18.4
ml/
Pulse
6.62l/h
Operation
mode
Input value
[mA]
Dosing flow
[%]
4-20 mA
≤
4.1
0
≥
19.8
100
0-20 mA
≤
0.1
0
≥
19.8
100
T
M
06
70
79
29
1
6
T
M
06
70
80
29
16
0
Q [%]
0 - 20 mA
4 - 20 mA
[mA]
4
20
8
12
16
100
80
0
60
40
20
Operation
51.4
l/h
0-20mA
17.14mA
