Field device and degradation diagnosis method
AssigneeAzbil Corporation
InventorKouichiro Murata
Life of this patent
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Abstract
A diagnosis unit determines a first degradation degree of a display device on the basis of a measured illuminance calculated from an output of a photo sensor, compares the first degradation degree with a degradation threshold, and outputs a corresponding diagnosis when the first degradation degree reaches the degradation threshold.
Claims10
A field device including a display device that displays various kinds of information, the field device comprising:
- a photo sensor;
- and
- a diagnosis unit that determines a first degradation degree of the display device on the basis of a measured illuminance calculated from an output of the photo sensor and that compares the first degradation degree with a degradation threshold previously set for the display device,
- wherein the diagnosis unit outputs a corresponding diagnosis when the first degradation degree reaches the degradation threshold.
A degradation diagnosis method used in a field device including a display device that displays various kinds of information, to diagnose degradation of the display device, the degradation diagnosis method comprising:
- a light-receiving step of receiving light with a photo sensor;
- and
- a diagnosis step, performed with a diagnosis unit, of determining a first degradation degree of the display device on the basis of a measured illuminance calculated from an output of the photo sensor, of comparing the first degradation degree with a degradation threshold previously set for the display device, and of outputting a corresponding diagnosis when the first degradation degree reaches the degradation threshold.
Dependencies are inferred from the claim text.