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
Insertion tool
System and method for anticipating wireless signal loss to provide robust location based services
Direct method and reagent kits for fatty acid ester synthesis
Process for production of peptide thioester
Apparatus and method for generating user interface based on task service
Radio communication system, scheduling method, radio base station device, and radio terminal
Pressure washer wand having a nozzle selector
  Randomly Featured Patents
Helmet system with optical display projection system including a cylindrical refractive surface
Smart indexing head for universal lead frame work station
Massage machine of chair type
Gateway load balancing protocol
Methods and apparatus for accelerating secure session processing
Automatic process line
Rail fastener assembly
Installation module for a paper or board machine
Intelligent electronic device for providing broadband internet access
Signal transmission circuits that use multiple input signals to generate a respective transmit signal