Resources Contact Us Home
Variable power control for process control instruments

Image Number 8 for United States Patent #6686831.

A process control instrument includes a sensor/actuator portion and a transmitter portion connected to the sensor/actuator portion. The transmitter portion is operable to communicate with other process variable transmitters through a communication network. The transmitter includes a processing module and a power module operable to generate a power output supplied to at least the transmitter portion, wherein the power module is operable to adjust the power output based on a power control signal. Moreover, the power control signal may be generated by a controller device remote from the process control instrument and communicated to the process control instrument over the communication network. Additionally, the power module includes a power control module for adjusting the power output. This power control module includes an amplitude limiter operable to limit a power input to the process control instrument according to a controllable amplitude limit, and a power rate of change unit operable to limit a rate of change of the power input to the process control instrument according to a controllable adjustment rate limit.

  Recently Added Patents
Method for manufacturing and reoxidizing a TiN/Ta.sub.2O.sub.5/TiN capacitor
Process for manufacturing a self-sealing composition
Semiconductor device and method for manufacturing the same
Optical disc drive having a tray for loading a disc using supporting portions
Cellulose derivative and hydrogel thereof
Layout design defect repair based on inverse lithography and traditional optical proximity correction
Modified polyolefin resin for glass fiber treatment, surface-treated glass fiber, and fiber-reinforced polyolefin resin
  Randomly Featured Patents
Window security system
Solid insecticidal formulation
Analog-digital converter and power saving method thereof
Time of flight aspects for X-Ray fluorescence visualizer, imager, or information provider
Method for controlling boiling point distribution of coal liquefaction oil product
Coextruded plastic film label for in-mold labeling
Valve and components therefor
Personal care and cosmetics compositions comprising biologically-based mono and di esters
Composite abrasive products
High rate trellis coding and decoding method and apparatus