Micronics
Portaflow 222 & 333 User Manual
Issue 3.1 Feb 20
Page 37
Formula to obtain Volume per Pulse based on a (default) 50ms pulse width:
Volume per Pulse >= maximum flow rate (in litres per minute) / 600
Example for maximum flow rate of 500 l/min:
Volume per Pulse >= 500 l/min / 600 = 0.833 litres per pulse
Rounding up to nearest whole litre:
Set
Volume per Pulse
to
1 litre.
6.2.2
Frequency Mode
In Frequency mode, the output frequency is proportional to the flow rate within a specified frequency
range of 1
–
200Hz. The flow units are fixed as litres per second.
6.2.3
Energy Pulse (Portaflow 333 only)
Each pulse represents an amount of energy e.g. 1kWh. The same limitation on maximum pulse rate
applies as detailed in the Volumetric Mode. Again a larger unit of energy per pulse or a smaller
pulse width may be required.