Re: Re: DMM with PC interface reduced @ maplin

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

Interesting ... I've not used a clamp meter before, but I somehow=20
imagined a closer & more symmetric fit to the cable to be measured,
and=20
a less-close proximity to other cables ... !

'maybe it depends on the magnitudes of the currents ?

Chris



David Chapman wrote:

> Forgive the updated repost from last month but very relevant:
>
> > My thinking is that I have a digi-meter (bought from Maplins)
that has =
a
> > PC serial output, if the
> > meter can make some kind of sense of the output then it may be
> > better/cheaper PC solution.
>
> Basically what I have done - the Mastech 345 which has PC interface is
> measuring the current in mA that is going through a clamp meter. The
clam=
p
> meter is a =A312 Ebay cheapy - just take the back off and route
clamp/coi=
l
> lead through Mastech. Of course values on the Mastech are a bit=20
> meanless but
> are linear so just need a multiplier which you can do on the PC.
>
> Alternative - the leads from the clamp meter to the clamp can be=20
> extended -
> mine have about 15 metres of screened cable on, the clamp is removed
and
> around the tail in the outside meter box, the display (body of
clamp=20
> meter)
> is in the kitchen in a box and fed from a 9V adapter so always on.=20
> Pics here
> show how I lashed it all up for test. It's been working fine for over
a
> year.
>
> http://www.manbus.com/DSCF4654.JPG
> http://www.manbus.com/DSCF4655.JPG
> http://www.manbus.com/DSCF4867.JPG
>
> David C
>
>
>
>
>
>
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