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
Plants and seeds of corn variety CV294874
Method of monitoring and configuring
Direct connect single layer touch panel
Debris tray
Humidity indicator and method for fabricating the same
Image decolorizing device
Computing device with improved user interface for applications
  Randomly Featured Patents
Apparatus for reading an original surface by illuminating it with a slit-like beam
Integrated liquid crystal display and optical touch panel
Video camera system having remote commander
Multi-format poker game
Method for producing slide seat and its manufacture device
Tuner circuit
Method for striping pencils
Calibration methods and structures for pipelined converter systems
Exercise aid
Terphenyl derivatives, preparation thereof, compositions containing same