The Contrec 515 FA01 application pack is a versatile flow computer designed for accurate volume measurement. It can add or subtract values from two frequency inputs or two analog inputs, making it ideal for various industrial applications.
This flow computer is capable of receiving signals directly from flowmeters or gathering retransmitted signals from other flow computers. It provides a clear display of the flow rate and total for each channel, along with a combined result.
The frequency input works with a wide variety of signals, including millivolt signals, reed switches, Namur proximity switches, and pulse trains, thanks to its user-friendly front panel program selection. The analog input can be customized with scaling, filtering, non-linear correction, and cutoff points to enhance signal accuracy.
CALCULATIONS
For frequency inputs, the total calculations are precise as the device counts all pulses detected on each channel.
Channel total = pulses / k-factor
The flow rates are calculated from the accurately measured frequency:
Channel flow = frequency / k-factor
For analog inputs, the flow rate is derived by normalizing the analog input to a value (A) between 0 and 1.
Channel flow = (Vfmax – Vfmin) * A + Vfmin
Channel total = (channel flow * Δt)
The final results are:
ADD result = channel 1 + channel 2
SUB result = channel 1 – channel 2
