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Wed May 09, 2012 08:30:03 PM
Short Desciption:
C o n tro ller B asics. Danaher Industrial Controls Group –. Process Automation, Measurement & Sensing. Temperature. Controller. Basics. Handbook
Summary:
Why do we need temperature controllers?
Temperature controllers are needed in any situation requiring a given temperature
be kept stable. This can be in a situation where an object is required to
be heated, cooled or both and to remain at the target temperature (setpoint),
regardless of the changing environment around it.
There are two fundamental types of temperature control; open loop and
closed loop control. Open loop is the most basic form and applies continuous
heating/cooling with no regard for the actual temperature output. It is analogous
to the internal heating system in a car. On a cold day, you may need to turn
the heat on to full to warm the car to 75°. However, during warmer weather, the
same setting would leave the inside of the car much warmer than the desired 75°.
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"Temperature Controller Basics Handbook"
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