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3 Answers

Source of power for the Oil Temperature Gauge

Asked by: 5701 views , ,
Aircraft Systems

Hi all,

I read that the Oil temperature gauge is not affected by a full power loss of the aircraft. Is that gauge has its own source of power , or does it work like the Oil Pressure gauge ?

Thanks

 

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3 Answers



  1. Jim Ward on May 10, 2014

    Hi Bidochon,

    Two types of oil temperature gauges are used in aircraft. Its reaction to a complete loss of electrical power depends on which type of gauge you have.

    Originally, oil temp was measured with capillary gauges. These don’t depend on electricity, so function in aircraft without electrical systems.

    Modern gauges found in aircraft with electrical systems use a transducer, which produces tiny voltages that are sent to the gauge via an electrical connection. These require a separate power source at the gauge to amplify the signal and move the needle. Loss of electrical power with this kind of device will make the gauge read off-scale low – that is, the needle will rest on the peg at the low end of the scale.

    Jim

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  2. Best Answer


    Jim Ward on May 10, 2014

    Hi Bidochon,

    Two types of oil temperature gauges are used in aircraft. Its reaction to a complete loss of electrical power depends on which type of gauge you have.

    Originally, oil temp was measured with capillary gauges. These don’t depend on electricity, so function in aircraft without electrical systems.

    Modern gauges found in aircraft with electrical systems use a transducer, which produces tiny voltages that are sent to the gauge via an electrical connection. These require a separate power source at the gauge to amplify the signal and move the needle. Loss of electrical power with this kind of device will make the gauge read off-scale low – that is, the needle will rest on the peg at the low end of the scale.

    Jim Ward

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  3. Bidochon on May 11, 2014

    That’s what I call KNOWLEDGE. Thanks a lot Jim.

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