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AD597AHZ got burnt

Hi, I install AD597AHZ as thermocouple converter at the mining dump truck, for exhaust gas temperature measurement. AD597AHZ power suplly is protected and become galvanically diconnected when engine stopped. But sometimes AD597AHZ got burnt: I see 0mV at output or some chaotically changing value instead of real output 10mV/C. I suspect overvoltage at inputs, but I am not 100% sure. Can anybody suggest am I right or not? If I am right, would you please suggest how can I protect AD597 inputs?  BR!

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  • Hello ahov90,

    You can try double checking all of your connections and verifying that the AD597 is being powered when you expect it to.  Can you attach a schematic of your system as well as any photos of the waveforms you are seeing?  I may be able to help further with that information.

    Regards,

    Jordyn

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  • Hello ahov90,

    You can try double checking all of your connections and verifying that the AD597 is being powered when you expect it to.  Can you attach a schematic of your system as well as any photos of the waveforms you are seeing?  I may be able to help further with that information.

    Regards,

    Jordyn

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