The Contrec Model 515 (Application FN01) is a net oil flow computer built for upstream petroleum production, where the flow coming off a well test separator is a mix of oil and water and you need to know how much is actually oil. It takes the frequency output from a Coriolis mass flowmeter, together with live temperature and density inputs, and works out the water cut in real time so it can separate out the net oil volume and mass from the total flow.
Volume correction is done to ASTM D1250-04, comparing the live temperature and density readings against the reference densities you’ve programmed in for the oil and water phases. This is the calculation basis oilfield operators rely on for fiscal reporting on separator and well testing manifolds, so the numbers hold up for allocation and custody purposes, not just internal monitoring.
In actual application, this application code is normally paired with a Coriolis meter that’s already outputting both a frequency signal and a live density signal. The 515 has an onboard adjustable transducer excitation supply so you can power the field transmitters directly, plus 4-20mA retransmission and Modbus RTU over RS-485 so it reports back to the plant SCADA or well testing skid controller. The IP65 housing holds up fine in typical wellsite conditions.
Before we quote this, we would normally check the flowmeter’s frequency and density output ranges, the reference densities you use for the oil and water phases, and what output signals your control system needs. Hope this helps.
