MICROPROCESSOR-BASED COMBUSTION ANALYSIS INSTRUMENTATION FOR FUEL COST CONTROL

摘要

Significant cost savings can be realized from the proper adjustment of boilers and furnaces. The presence of a microprocessor in instrumentation that measures the oxygen content of flue gas can enhance the instrument's performance and extend its capabilities.In an instrument using an in situ zirconium oxide sensor for continuous oxygen monitoring, the microprocessor can linearize the nonlinear output of the sensor, compare oxygen readings to limits, perform sensor-fail tests, and control a printer.For a portable combustion service instrument using an electrochemical sensor to measure oxygen, the microprocessor can speed boiler tune-up to reduce costs by providing pushbutton calibration and eliminate the need for a combustion slide rule or tables by calculating and immediately displaying combustion efficiency, excess air, and equivalent carbon dioxide.