English (GB)
19
7.1.3 Keys and LEDs (DDE-AR)
When pressing and holding down the [100%] key, the
pump doses at 100 % for a certain time. The [100%]
key can be used e.g. for deaeration.
The [Operation mode] key is used to change the
operation mode. See section
The operation mode LEDs indicate the active
operation mode. Only one operation mode can be
active at a time. Together with the status LEDs, the
operation mode LEDs indicate the following statuses
and faults:
●
= LED on
❍
= LED flashing
empty table cell = LED off
*
For some alarms the pump tries to restart
periodically. Observe section
.
7.2 Operation modes
Following operation modes are available:
•
Manual
•
Pulse (DDE-AR)
, see section
•
Analog (DDE-AR)
, see section
7.2.1 Manual
In this operation mode, the pump doses constantly
the dosing quantity set by the adjusting knob.
The setting range depends on the pump type:
7.2.2 Pulse
Applies to DDE-AR control variant.
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 stroke volume in percent.
The dosing quantity per pulse is set to a value
between 0.125 % and 100 % of the stroke volume
using the adjusting knob.
The setting range 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.
LED status
Pump
status
Description
●
Running
❍
Stop
Capacity
adjusted to 0 %
●
Running
❍
Standby
No incoming
pulses
●
Running
❍
Standby
Analog signal <
4.1 mA
❍
●
Running
Low-level in
tank
●
❍
Standby
Tank empty
●
❍
Standby
External stop
activated
❍
Standby*
An alarm is
active. See
section
.
Type
Setting range
[l/h]
[gph]
DDE 60-10
0.075 - 60
0.0197 - 15.8
DDE 120-7
0.15 - 120
0.04 - 32
DDE 200-4
0.25 - 200
0.066 - 52.8
Type
Setting range [ml/pulse]
DDE 60-10
0.0070 - 5.56
DDE 120-7
0.0145 - 11.58
DDE 200-4
0.0242 - 19.3
