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 additive 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.
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.
The front panel display shows the current values of the
input variables and the results of the calculations. A list of
the variables for this application and their type (total or
rate) is shown at the end of this document.
The instrument can be supplied with a real-time clock for
storage of up to 1000 transactions with time and date
There are two communication ports available as follows:
• COM-1 RS-232 port
• COM-2 RS-485 port (optional) or Ethernet (optional)
The ports are available for remote data reading, printouts
and for initial application loading of the instrument.
The opto-isolated outputs can be configured to retransmit any main menu variable or provide various error/control signals (flow error, pump control, end-of-batch, etc.). One output is standard, a second output is available as an option.
The relay outputs 1 and 2 are used to control the flow of product for each delivery. These contacts are normally open and can be used to drive external relays, valves, pump circuits etc. The advanced option provides another two relays that can be used as fully programmable alarms for any rate type variable.
The instrument can be programmed to suit the particular application needs and the flexible I/O can be assigned as required. Program settings can be changed either via the front panel (depending on assigned access levels) or viathe 500 Series Program Manager (500-PM software).
The instrument stores all set-up parameters, totals and logged data in non-volatile memory with at least 30 years retention.