Contrec 505 – FC02

Analogue Input Flow Computer, Tailored for Volumetric Flow Meters

The 505 FC02 application pack is a rate totaliser for the measurement of fluid. It uses the 4-20 mA analog output from a volumetric flowmeter.

The flow computer displays the flow rate, resettable total and the accumulated total in the units of measure according to the purchase order.

The analog input can be scaled as well as having filtering, square law or non-linear correction and cutoff points applied to the signal.

A freely programmable “user value” on the main menu can serve as a setpoint for the 4-20mA output or as an operator identifier to be logged.


To derive the flow rate, the analog input is normalised to a value (A) between 0 and 1.
volumeflow = (Vf max – Vf min)A + Vfmin

volume = ∫( volumeflow × Δt)