Patent ID: 6279377
Filing Date: 2001-08-28
Classification: G01N

Abstract:
An oxygen monitor comprising:a sensor for sensing oxygen concentration by providing output values indicative thereof;a status display representing a value of sensed oxygen concentration relative to a plurality of threshold values,said monitor further comprising a control processor for generating status displays for a plurality of threshold values in accordance with calibration by a single calibration gas, wherein said monitor comprises a component varying an output of said sensor, and said control processor comprises:calibrating means for calibrating said sensor by varying an operating parameter of said component of said monitor to a calibration value providing an output value of said sensor corresponding to a concentration of said calibration gas;storage means for storing said calibration value of said component; andretrieving means operable during a monitoring operation for retrieving said calibration value from said storage means and for setting said operating parameter of said component to said calibration value to perform the monitoring operation.