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
Semiconductor device
Headset systems and methods
Floor relief for dot improvement
Data architecture and user interface for plasma processing related software applications
Systems and methods for assigning a template to an existing network configuration
Wiring structure in a semiconductor device, method of forming the wiring structure, semiconductor device including the wiring structure and method of manufacturing the semiconductor device
  Randomly Featured Patents
Pharmaceutical use of N-carbamoylazole derivatives
Ventilation structure of microwave oven and lamp fitting structure therefor
Mulching mower and clean-up machine
Sheathing-retaining wedge assembly for use with a post-tension anchorage system
Hydraulic refrigeration system and method
Oscillator with Darlington nodes
Image compression technique
Process cartridge, electrophotographic image forming apparatus and cartridge mounting method
Method for manufacturing a pole piece for electromagnetic friction clutch
Turbocharger bearing assembly and lubrication thereof