Re: Re: Energy monitoring on multiple circuits

[Paul Smith <yahoo@xxxxxxx>]

Hi Howard,

if you want to roll your own, then have a look here.

http://openenergymonitor.org/emon/

Regards

Paul


On 20 June 2011 15:33, Dave McLaughlin
<dave_mclaughlin@xxxxxxx>wrote=
:

> **
>
>
> Hi Howard,
>
> What about using a commerical power meter like this one from Farnell.
>
> Stock code 1758713
>
> This has an optional plug in Modbus RS485 interface that allows you to
> interrogate all the values you need.
>
> Bit more expensive of course, but it works with 3 or single phase.
>
> You do need to add current transformers but any cheap ones will do
just
> fine
> as long as they match the input requirements.
>
> Dave=85
>
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> howardsixtynine
> Sent: 20 June 2011 18:35
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Re: Energy monitoring on multiple circuits
>
> I just thought I'd report back in case anyone else was thinking of
doing
> this. Don't bother, it's not a useable solution.
>
> I bought a complete kit from Techtoniq, plus two extra clamps and an
> appliance monitor. The accuracy of the main unit is sort of just about
> useable for monitoring trends (under reads by about 12% but this
varies).
> The clamps for the extra two phases are a complete waste of money -
under
> read by 25% to 50%, and the total bears no relation to the sum of each
on=
e
> taken separately.
> The Techtoniq software isn't up to much either.
>
> --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
,
> "howardsixtynine" <howardsixtynine@...> wrote:
> >
> > Have I got this right?
> > I need a regular Current Cost (Is that the Envi?), with two extra
clamp=
s,
> plus =A310 for Techtoniq software to do nice graphs from the data.
> > The Eon monitor is a branded Current Cost, loads on ebay for
=A315 ish.=
.
> > The Eon units on ebay all only come with one clamp, do they have
socket=
s
> to add two more?
>
> Can anyone recommend me a budget energy monitoring system to keep
track o=
f
> usage
> in our office? I'm looking for something that will monitor several
circui=
ts
> (3
> minimum) and show a graph of consumption against time for each
circuit.
>
> [Non-text portions of this message have been removed]
>
>=20=20
>



--=20
Paul Smith

Your Local Computer Specialist, Supporting Your Business When You Need It
Most

Tel:-  0845 009 6226

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