16
■ Pulse control (see page 42 & 54)
The flow rate is automatically controlled by the flow volume (ml) per pulse and the pulse signal frequency from a
flow meter.
* It takes about 10 pulses for the IX to catch up with the change of the frequency.
Example of use: Chemical dosing in a sewage treatment system
■ Batch control (see page 42 & 54)
The IX discharges a programmed flow volume per pulse and stops when it is completed. The programmed or
remaining flow volume is shown on the controller until it has reduced to zero. In this control mode, the pump
runs at the MAN speed (the pump speed in the manual mode). The pump behaviour can change depending on
the setting of the buffer. See below.
When the buffer is OFF:
Any input of the external pulse signal will be cancelled when the pump is activated for the earlier pulse input.
The next dosing becomes ready after the programmed flow volume has been completed.
*Note the control stops immediately when the key is pushed once.
10Hz
5Hz
10Hz
0
Pulse signal
Flow rate at 10Hz
Fow rate at 5Hz
Flow meter
Pulse signal
Flow
Pump
Supply tank
Cancelled
Pump
Run
Stop
Run
Stop
Run
Pulse input
Programmed
flow volume
Signal out
(batch comp alarm)
Operational functions
