Batch Controller - Model 515-BA01

The 515-BA01 application is a batch/additive controller designed to be a standalone unit capable of controlling a batch and the injection of an additive into a main product line during a delivery. Both the main and additive inputs are for volumetric frequency flowmeters.

Batch control can operate in preset or on-off modes. In PRESET mode the 515-BA01 is responsible with providing the dual stage batch control of a main line product as well as controlling the dosing of an additiven product into the main product. In UNLOAD/PACING mode the unit operates in conjunction with an external load or batch controller by monitoring a main line flow signal and is responsible for the accurate dosing of the additive.

An intelligent additive dosing algorithm and trimming has been designed in the 515-BA01 which simplifies the programming required and ensures the additive dosing remains within specification. Dosing is primarily based on the target dosing PPM and the nominal additive flowrate with the choice of time or quantity based intervals.

Calculations
The total and flowrate are derived from accurately measured frequency and the number of received pulses.

volume = pulses / k-factor
volume flow = frequency / k-factor

Automatic overrun compensation calculates the new valve closure point to ensure correct delivery by averaging the overrun amount from the last three complete batches.

The overrun compensation value is valid for a new preset value provided the stored overrun is less than 20% of the new preset.