Thermo Scientific STD5000, Руководство пользователя

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Chapter 1
Product Overview
Thermo Fisher Scientific’s STD5000 and STD6000 current to pressure
(I/P) transducers represent the highest standard in I/P technology. The
rugged NEMA 4X housing, compact size, and plug-in E-Pi module
coupled with Thermo Fisher’s field proven technology make them the most
accurate, reliable, and simplest I/P transducers to install, operate, and
maintain in the industry.
Thermo Fisher’s solid state current-to-pressure converter (E-Pi) technology
uses minimal electrical energy and air consumption to convert an electronic
input signal (4–20 or 10–50 mA) to a proportional pneumatic output
signal (3–15 psig, 0.2–1 bar, etc.). The E-Pi transducer utilizes a virtually
weightless membrane that is electromagnetically positioned over a nozzle to
precisely modulate the pneumatic (backpressure) output. The low mass
membrane is held in a continuously balanced position, providing an output
that is unaffected by shock, vibration, or mounting position. The output of
the E-Pi is then fed into an integral volume booster to deliver a pneumatic
output signal with an output capacity of 4.0 standard cubic feet per minute
(scfm).
The overall performance, accuracy, and repeatability are enhanced by
employing an internal feedback network whose speed and resolution enable
the transducer to quickly respond to input changes. The balanced supply
and exhaust dynamics enhance control stability, while delivering accuracies
of ± 0.15 to ± 0.25 percent of span.
Thermo Fisher Scientific STD5000 & STD6000 User Guide 1-1