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Additive Controller for Volumetric Frequency Flowmeters & Stroking Dosing Pumps
The 515 AC01 Additive Injection Controller is designed to control the injection of additive chemicals with respect to a main flow.
Tailored for volumetric frequency flowmeters it will operate with a range of stroking dosing pumps controlling the dosing rate via either an output pulse or 4-20mA signal.
The instrument will calculate a Target Stroke Rate and the intervals of main volume at which a Stroke Output Pulse will be generated based on the dosing pump parameters and the process ratio set point, programmed in PPM (parts per million).
The additive flow is monitored and measured along with the main flow to continuously calculate the overall Process Ratio and the Sample Ratio that provides a faster “real time” PPM value of the dosing chemical. There are flow and deviation exceptions, alarms and a permissive that can be used to help maintain control and integrity of an additive injection system.
Features
Suited for injection ratios from 10 to 10000 PPM
Programmable pump stroke volumes and maximum stroke rates to cater for wide range of dosing pumps
Adjustable sampling method deals with the inherent problems of measurement and control of pulsating injections
Continual monitoring of main flow and calculation and ‘trimming’ of required dosing rates
Permissive input allows system to settle without raising exceptions
Warnings provided for: No Additive Flow, Excess Additive Flow and Sample Deviation Exceeded
Warning of external alarms and main flow too high for dosing pump
Allows for non-linear correction
Selection of second language and user tags
RTC logging with over 1000 entries
Selectable protocols on serial ports including Modbus RTU and Printer output
Backlit display with LCD backup Typical plant diagram
Downloads
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