18. Add-on volume based dosing
95
Dr. A. Kuntze
I
Gutes Wasser mit System
Robert-Bosch-Str. 7a
40668 Meerbusch
+49 (0) 2150-7066-0 / Fax -60
www.kuntze.com
Pulse frequency (only for pulse type= pulse frequency)
Enter the frequency that corresponds to maximum dosing.
18.3. Pump relay
In applications with volume based dosing, the measuring point is usually installed in a bypass, and
measuring water is supplied by a circulation pump. Via the pump relay you can switch off the pump if
no water is available in the main pipe.
In the menu DOSAGE select the symbol PUMP RELAY.
R2 on/off
If you do not want to control the circulation pump with the relay, you
can switch it off.
Relay 2 contact
Relay 2 is a normally open contact. In the menu you can invert it so
that it is actively closed. If you select NC (normally closed contact) the
relay will open to activate the pump and close to stop it.
Attention
If you invert the relay and the instrument does
not get power, the relay will open, turning on
the
circulation pump regardless of the water
situation! In that case you have to take other
precautions that the pump cannot run dry.
Circulation stop delay
Here you can define how long the circulation pump should keep on running after the flow meter has
indicated that the flow has stopped.