Re: Household electrical current to Excel ???

[nobody@xxxxxxxxxxxx (Dave Houston)]

With the proliferation of switch mode power supplies and other non-linear
loads, you need a much higher sampling rate.

Dan Bloomquist <public21@xxxxxxxxxxx> wrote:

>But if time is money and you want to capture the signature of motor
>start-ups...
>
>Take a couple of cheap current transformers and a door bell transformer
>for sensors. (The first one I did was twenty five years ago using a hall
>device and multiplying in a MC1495)
>
>These days just take your three outputs and run them to something like
>the LabJack.
>http://www.labjack.com/labjack_u12.html
>
>Now you can even catch the power factor of reactive loads. At 20 samples
>per cycle you won't do to bad. If you are into it, you can hang a
>multiport AD converter on the parallel port.
>
>The question, 'does someone have a package ready to go?'. I'm sure there
>is. But it is likely to be industrial pricing requiring labview.
>
>Best, Dan.