En
gl
is
h (
G
B)
22
6.4 Operation modes
Three different operation modes can be set in the
"
Setup
>
Operation mode
" menu.
•
Manual
, see section 6.4.1
•
Pulse
•
Analog 0-20mA
Analog 4-20mA
6.4.1
Manual
In this operation mode, the pump constantly
doses the dosing flow set with the click wheel.
The dosing flow is set in l/h or ml/h in the "
Operation
"
menu. The pump automatically switches between the
units. Alternatively, the display can be reset to US
units (gph). See section
Fig. 14
Manual
mode
The setting range depends on the pump type:
*
When the "
SlowMode
" function is active,
the maximum dosing flow is reduced,
see section
6.4.2
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. 15
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
).
6.4.3 Analog 0/4-20 mA
Applies to DDC-AR control variant
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.
T
M
04
81
70
35
10
Type
Setting range*
[l/h]
[gph]
DDC 6-10
0.0060 - 6.0
0.0015 - 1.5
DDC 9-7
0.0090 - 9.0
0.0024 - 2.4
DDC 15-4
0.0150 - 15.0
0.0040 - 4.0
T
M
0
4
11
2
6
11
1
0
Operation
3.40
l/h
Manual
Operation
0.0400
ml/
Pulse
3.40 l/h
Type
Setting range [ml/pulse]
DDC 6-10
0.0016 - 16.2
DDC 9-7
0.0017 - 16.8
DDC 15-4
0.0032 - 31.6
Warning
Subsequent processing of saved pulses
can cause local increase in concentration!
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
