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I worked at "Control & Power
Systems Inc." for about eight years were I was in charge of
design and development a wide range of equipment for various
industries, for example water treatment controllers as those
described below as well as foam and liquid polymer delivery
systems, chlorinators ,pH neutralization systems, and many more. |
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Industrial Computer & Single
Board Computers:
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In late 80's I designed and programmed a
water quality controller for cooling tower. Due to limited
habitability of microprocessor based controllers at the time a
PC mother board fitted with digital & analog I/O cards was
constructed, signals of pH, Conductivity and ORP were brought into
the computer.
Those controllers, though primitive,
were put in service at various states in the US as well as
Canada & Europe.
Later on, I came out with a new, more
compact and economical design based on single board computers
shown below. |
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The smaller version of the water quality controllers
used a single
board computer programmed in C and assembly language. All
auxiliary interface boards that were built,
were conceptually designed by myself.
This controller, as well as the earlier
version, was built to accept signals from pH, ORP and
Conductivity transmitters to control several metering pumps and
valves which fed various chemicals to the water or bled/added fresh water when needed.
In addition, this unit was capable of collecting periodical data
from the instrumentation and download it to a 3.5 disk in coma
delimited format. It also has a serial port available for
monitor and control using standard modbus serial protocol. |
Programmable Controllers & Relay Logic:
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During all the years working for CPS I also participated
and led the design and fabrication of various control panels and
systems using relays or discreet components as well as PLC based
systems.
These panels were utilized in several industries for water
treatment or waste recovery. The picture at the right is of a
chemical delivery system that was installed in a brewery for
water quality control for the pasteurization process using a
Allen Bradley PLC 5 controller.
Below you can see different pictures of various controllers
using both PLC or relays for similar functions on aluminum can
factories, paper factories (polymer delivery and mixer)
and others. |
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