| 摘要 |
PURPOSE:To check the deterioration of a motor oil by warning via a control circuit giving a signal from the output side thereof when the value of a current running through the power supply lead wire of an oil rotary pump is larger than the predetermined value. CONSTITUTION:An overcurrent meter 4 is provided on the lead wire 3 for the motor 2 of an oil rotary pump 1. A control circuit 5 compares a current value inputted from the overcurrent meter 4 with the predetermined value. When the inputted current value is larger than the predetermined value, the circuit 5 outputs a signal from the output side thereof. A warning sound is generated from a speaker 9 via an interlock mechanism 6 and an alarm drive circuit 8. Consequently, the deterioration condition of the pump 1 can be checked preliminarily before the operation of a device.
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