Abstract: A data processing system and method for use with a process control system enables a plurality of process plants associated with different business entities to share a remotely situated data processing facility. The data processing facility includes a cluster of redundant servers that are communicatively coupled via a local network. Each of the redundant servers is adapted to acquire and process data received from the plurality of process plants. The data processing facility also includes a plurality of redundant data historians that are communicatively coupled to each other and to the cluster of redundant servers for storage of process data and analysis results. Each of the plurality of process plants includes internet-enabled field devices, internet-enabled field device interfaces, and/or internet-enabled data concentration nodes that send information to and receive information from the data processing facility via the Internet.

Abstract: A combustion gas analyzer for measuring the concentration of a gas constituent in an exhaust gas stream is provided. The gas analyzer includes a sensor cell assembly coupled to a transmitter having electrical circuitry configured to provide an output of the concentration of the gas constituent as sensed by the sensor cell assembly. The combustion gas analyzer also includes a filter substantially enclosing the sensor cell assembly and a conduit coupled to the filter at a first end of the conduit and coupled to a valve assembly at a second end of the conduit. The conduit is used for supplying a calibration gas to the sensor cell assembly or for supplying a blow-back gas used to purge the filter.

Abstract: A data processing system and method for use with a process control system enables a plurality of process plants associated with different business entities to share a remotely situated data processing facility. The data processing facility includes a cluster of redundant servers that are communicatively coupled via a local network. Each of the redundant servers is adapted to acquire and process data received from the plurality of process plants. The data processing facility also includes a plurality of redundant data historians that are communicatively coupled to each other and to the cluster of redundant servers for storage of process data and analysis results. Each of the plurality of process plants includes internet-enabled field devices, internet-enabled field device interfaces, and/or internet-enabled data concentration nodes that send information to and receive information from the data processing facility via the Internet.