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  1. #1
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    Current Measure using Current Transducer

    Hi,

    I am trying to measure the energy consumption of a PC system in a high resolution and sample rate (to measure the effect of different algorithms on the power consumption). The expected current should be under 2.3A (550W/230V='power rating of power supply'/'wall power').

    I ended up buying a ARM Energy Probe Measuring Card (https://www.farnell.com/datasheets/1728565.pdf) and a CR4110S-20 Current Transducer (http://www.crmagnetics.com/Assets/Pr...100_Series.pdf) which I want to use to measure non-invasive on the power supply cable of my PC.

    The Current Transducer should transform 0-20AAC to 0-5VDC with a linear transformation (x4). Nevertheless, with a multimeter I'm measuring values in the range of 0,00XV. Even stranger, when using the Measuring Card the voltage oscillates between 0V and 1,5V independently if the cable I measure is under power or not.


    I'm new in this domain. Does anyone have an idea for troubleshooting?

    Thanks in advance,
    Adrian

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  2. #2
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    Re: Current Measure using Current Transducer

    The current transducer doesn't work if you place the multi wire power cable in the core. The field of L and N wire are cancelling out. Place either L or N wire.


    2 members found this post helpful.

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  3. #3
    Advanced Member level 5
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    Re: Current Measure using Current Transducer

    that is quite funny ...



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