Foxboro e69 manual

Under the new agreement, the company is now also the sole manufacturer for new products in the following Foxboro lines:. Companies around the world have come to rely on these quality products in their plants, and we look forward to answering the call when they have a need for new or remanufactured process controls. The transfer will be completed by December 31, with full production starting at the beginning of Time displayed is Flowtime.

About Foxboro, Division of Schneider Electric. Foxboro Division of Schneider Electric. Foxboro, MA Contact Foxboro directly at.

Schneider Electric is an international company focused on the use of technologies to address the worldwide issue of energy. Foxboro is a good fit within the Schneider structure as they are manufacturers of quality process measurement instruments that are intended to function within sophisticated device networks. This is an important characteristic for Schneider as they seek to expand their native product portfolio and thus the total value proposition they can offer both new and existing customers.

Foxboro has brought with them an industrial customer base that Schneider can now more adequately address than before. The force bar pivots at the fulcrum where the small diaphragm seal is located in a counter-clockwise rotation, tugging the flexure at the top of the force bar.

As the baffle approaches the nozzle, air flow through the nozzle becomes more restricted, accumulating backpressure in the nozzle. This backpressure increase is greatly amplified in the relay, sending an increasing air pressure signal both to the output line and to the bellows at the bottom of the range bar. Increasing pneumatic pressure in the bellows causes it to push harder on the bottom of the range bar, negating the initial motion Note and returning the range bar and force bar to their near-original positions.

Note : This negating action is a hallmark of force-balance systems. When the system has reached a point of equilibrium, the components will have returned to very nearly their original positions. Calibration of this instrument is accomplished through two adjustments: the zero screw and the range wheel.

This action attempts to push the baffle closer to the nozzle and therefore increases air pressure to the bellows to achieve equilibrium. The following photograph shows the range bar and range wheel of the instrument:. As in all instruments, the zero adjustment works by adding or subtracting a quantity, while the span adjustment works by multiplying or dividing a quantity.

In the Foxboro model 13 pneumatic transmitter, the quantity in question is force, since this is a force-balance mechanism. The zero screw adds or subtracts force to the mechanical system by tensioning a spring, while the range wheel multiplies or divides force in the system by changing the mechanical advantage force ratio of a lever.

Two pressure gauges indicate supply and output pressure, respectively. Wires convey the mA electrical signal into the coil unit inside the transducer.

A view with the cover removed shows the balancing mechanism used to generate a pneumatic pressure signal from the electric current input. This torque causes the coil to rotate counterclockwise as viewed in the picture , with the baffle connected to the rotating assembly. Thus, the baffle moves like the needle of an analog electric meter movement in response to current: the more current through the coil, the more the coil assembly moves and the baffle moves with it.

The nozzle faces this baffle, so when the baffle begins to move toward the nozzle, back-pressure within the nozzle rises. This rising pressure is amplified by the relay, with the output pressure applied to a bellows.