| CPC G06Q 10/20 (2013.01) [G01N 27/4073 (2013.01); G01N 27/4163 (2013.01); G01N 33/0006 (2013.01)] | 6 Claims |
|
1. A maintenance method for an oxygen analyzer that uses a zirconia sensor to measure an oxygen concentration of a gas to be measured, the maintenance method comprising:
storing in a memory, by the oxygen analyzer, a calibration coefficient for correcting, based on a measured value of a physical quantity measured by the zirconia sensor for a standard gas having a known oxygen concentration, a conversion formula for converting a measured value of a physical quantity measured by the zirconia sensor into the oxygen concentration of the gas to be measured;
approximating, by an information processing apparatus, a change over time in the calibration coefficient by a quadratic curve;
determining, by the information processing apparatus, a timing at which a rate of change of the calibration coefficient, estimated by the quadratic curve for the change over time in the calibration coefficient, reaches a predetermined upper limit of the rate of change as a timing at which the zirconia sensor should be calibrated; and
presenting, by the information processing apparatus, the timing at which the zirconia sensor should be calibrated.
|