• EEVblog #296 – AIM-TTi I-Prober 520 Current Probe Review

    A full review of the AIM/TTi I-Prober 520 Positional Current Probe.
    Some theory on how fluxgate magnetometers work.
    Measuring the absolute value of Earth’s magnetic field
    And a practical example of ground plane current tracing.

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      • Woaw, very interesting bit of test gear.
        The “mapping” of the current flow through the pcb is like magic to the noob I am.

      • Hakon

        now take a old cassete, connect a audio amplifier to the probe, move the tape and enjoy the music 😉
        Or is there any magnetic field from the magnetometer that damages the tape?
        I have no idea how much magnetism is being made by such a probe, please tell me if you know

        best regards from Germany,
        Hakon Hennig

      • Salas

        Dave did you try position the probe on the calibarator just by its own weight when the box was flat on the bench? Is it stable like that, and could it be the ”accurate” way to go better than 10% ?
        If not, using known current from looking at the Fluke on a known width trace could be better, although a PITA. But you could determine some knob ”offset” rule of thumb from such tests that takes you nearer when using the cal hole.

      • great tool .a bit too pricey .thandar are a good company.i have an old multimeter they made Black star 3210 .

      • Niklas Jansson

        Seems like a nice tool to have when testing switching regulators.

      • Worf

        Super idiotic question – where’s the link to that teardown?

      • Jay Ts

        So … it is quirky, full of gotchas, inaccurate, and its functionality depends on what compass direction you point it in … all for only $800?? Is it also affected by geomagnetic storms? Maybe that’s what caused the -10% accuracy! 😀 I will wait for a better design.

        But you are right: If I had one here, I would find many uses for it.

      • Amr

        Nice video and interesting tool. Would it have been easier to connect the unit to the scope via AC coupling? That’d easily get rid of that DC offset and allow you to just look the reference signal.

      • Bill Clay

        I kept waiting for Dave to slip up and call it the “flux capacitor”. hehe 🙂

      • Roland Wache

        Agilent in old days make something similar Current Tracer http://cp.literature.agilent.com/litweb/pdf/00547-90006.pdf

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