[SI-LIST] Re: Ground Connection for Current Probe
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 23 Jan 2013 05:09:55 -0800
The ground connection can help to avoid stray pick-up. For the
magnitude of current involved in an inrush situation I would not bother.
Steve.
On 1/23/2013 4:23 AM, vinod ah wrote:
> Hi All,
> I am using a current probe of 50MHz bandwidth with 15A max AC current. The
> probe is used for measuring in-rush current due to hot-plugging of a device
> (the device is bus powered and hence inrush current) to a host which
> supplies power to the device. The current probe has ground connection tip
> at probe tip end (the other end of probe is a BNC connector which gets
> connected to oscilloscope where it makes solid ground connection with
> respect to oscilloscope ground).
>
> Since the current probe works on Hall effect/sensing magnetic friend around
> a current loop, Is it necessary to connect the ground tip to board ground
> before i make the current measurement. Since there are 2 domains involved
> i.e. Fields (magnetic fields) and induced current through the probe and the
> current is of slightly higher frequency (around 1MHz), not sure on the
> grounding aspect.
>
> Regards
> Vinod A H
>
>
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