Automatic calibration for on-line process monitoring in continuous-flow systems

Automatic calibration for on-line process monitoring in continuous-flow systems

An automatic procedure for calibration in continuous-flow systems is proposed. A flow gradient unit in the sample channel, controlled via a switching valve, delivers a concentration gradient of the standard so that the standard concentration varies with time after the flow-rate gradient is started. Thus, the signal (absorbance)- concentration relationship can be determined and checked for (reca...

Calibration in process monitoring by using unsegmented continuous-flow systems

An overview is presented of the different aspects of the role of analytical chemistry in process monitoring and control. On-line monitoring is currently the most attractive option in this area, especially with unsegmented-flow techniques. In addition to allowing automation of these systems, the variety of ways in which calibration and recalibration can be performed allows their adaptation to an...

Continuous On-line Condition Monitoring of HV Cable Systems

This paper discusses data acquisition, transmission and processing methodologies for continuous on-line monitoring of partial discharges in high voltage cable systems. A PD continuous on-line monitoring system for underground cable circuits using capacitive couplers, LiNbO3 electro-optic modulators, laser, optical switch and optical fibers has been developed. Future research will consider effec...

In Line Flow-meter Calibration

PEANO - A Tool for On-Line Calibration Monitoring

On-Line Monitoring (OLM) of a channel’s calibration state evaluates instrument channel performance by assessing its consistency with other plant indications. Industry and experience at several plants has shown this overall approach to be very effective in identifying instrument channels that are exhibiting degrading or inconsistent performance characteristics. The Halden Reactor Project has dev...