Re: Re: Electrisave protocol / PC Interface

[Jon Payne <jgpayne@xxxxxxxxxxxxxx>]

Our house idle's at 360W. 150W is the server, which I've now changed
to turn itself on/off overnight, 70W for the alarm's (!), I think the
fridge takes ~150W when it's on...

And yes, the display definitely does have a power socket.

----- Original Message ----
From: Marcus Warrington <marcus.warrington@xxxxxxx>
To: ukha_d@xxxxxxx
Sent: Thursday, 7 June, 2007 8:46:05 AM
Subject: RE: [ukha_d] Re: Electrisave protocol / PC Interface


Our house still seems to level out at 500watt !... i.e. even in the
middle of the night its consuming half a kilowatt .. is this normal !!



Still haven't managed to get a handle on what's using this power, I've
had all the consumer unit circuits off and then turned them on one at a
time, also powered off everything in the house and turned back on one at
a time but still not managed to pin it down. The 6 second poll time
makes it difficult to get accurate measurements in this case,  as I can
switch something off ..wait.. get one reading.. switch it back on and
get a completely different reading than before I switched it off (or
maybe its fluctuations in voltage causing inaccurate power usage
readings from the electrisave?). I'm thinking maybe I should switch over
to the RFXComm units..



I thought the display panel *DID* have a power socket (9v) i.e. can be
run off the mains. It's the sensor (transmitter) that is purely battery
powered.



Marcus

________________________________

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
Of domdevitto
Sent: 06 June 2007 19:21
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: Electrisave protocol / PC Interface



> Regarding the Electrisave, the problem I have with it is range..
there are certain times of day and/or positions in the house where it
just looses signal.. even with fresh batteries. The other issue is
that the fastest poll time is 6 seconds (I think) which seems like an
eternity when you just switched off an appliance or light and are
waiting too what effect it has had. Also sometimes something else ,
like the fridge, may come on in-between which then gives you a false
comparative reading..

Agreed, but a proper meter would need to show:
average, min, max, and median

In practice, you only go around your house turning stuff off/on when
you first get it - then you can, from the display know when an unusual
amount of leccy is being used... Kids! Are your TVs on! You're meant
to be asleep!

One thing the Electrisave could do with is a transformer - the big LCD
on the receiver mean the batteries go after 5 months. Of course,
maybe this would be counter productive :-)





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