Oil deterioration detection apparatus

Details Oil deterioration detection apparatus Oil deterioration detection apparatus

2006-05-02

2006-05-02

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Electrolyte properties

Using a ph determining device

C324S446000, C340S652000

Reexamination Certificate

active

07038459

ABSTRACT:
An oil deterioration detection apparatus includes a sensor, an evaluation circuit, and a malfunction detecting circuit. The evaluation circuit has a determination circuit. The malfunction detecting circuit has a resistor and a switch. The evaluation circuit evaluates a condition of the oil based on a normal voltage. The normal voltage is measured when the switch is opened so that the resistor is not electrically conducted. The determination circuit determines whether the sensor malfunctions based on a relation between the normal voltage and a divided voltage. The divided voltage is measured when the switch is closed so that the resistor is electrically conducted in parallel with the sensor.

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