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Current Cost Support Forum • View topic - Optismart meter battery life

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warwickwater
PostPosted: Mon Jun 06, 2011 8:41 pm 
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A little knowledge can be dangerous... but from my limited understanding, to accurately count pulses the Optismart sensor will need to be on 24/7 (although only transmitting once every 6 seconds), unlike the current clamps which can turn on, sample, and then turn off very quickly, thus conserving the juice.

Is this going to negatively impact on battery life drastically? Has any testing been done to see how long the batteries last in real life situations?
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warwickwater
PostPosted: Thu Jun 09, 2011 12:48 am 
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No reply at all? This is a support forum, direct and reasonable question about the product?
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Automan
PostPosted: Fri Jun 10, 2011 12:39 pm 
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Location: East Sussex
I don't suspect the power consumption will be that much higher than the present clamp transmitter...

Both transmitter types are active all the time and transmit data every six seconds.

The OptiSmart I guess will just have a photo transistor (or the like) to look at the LED on the electric meter.

I can't imagine that circuit using much power...

Automan.
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warwickwater
PostPosted: Wed Jun 22, 2011 10:54 am 
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The CT clamp meter is NOT active all the time, it sleeps then wakes up for a fraction of a second to sample, transmit then go back to sleep again - it is effectively 'off' for 95% of the time (roughly).

A phototransistor meter will need to either be awake all the time (so as to not miss any pulses) or will be asleep but awoken frequently (by those pulses) to count them.

A reply from CurrentCost would be lovely....
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skmorgan1944
PostPosted: Tue Sep 06, 2011 1:48 pm 
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Location: Pembrokeshire, UK

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2.16kWp PV, 20 tube Navitron solar heating, 7kW wood burner in rural Pembrokeshire
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Automan
PostPosted: Mon Sep 12, 2011 12:14 pm 
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SeekerAfterTruth
PostPosted: Mon Sep 12, 2011 5:20 pm 
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Automan
PostPosted: Tue Sep 13, 2011 5:00 pm 
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Perhaps they use one of these inside?

http://www.microchip.com/en_us/technology/xlp/

Automan.
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Automan
PostPosted: Sun Sep 18, 2011 11:02 am 
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I have an excess number of envir transmitters so I just took one apart (CT clamp ones that is) :)

If of interest it has a Motorola PIC16F689 MCU inside.

Automan.
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skmorgan1944
PostPosted: Sun Sep 18, 2011 4:38 pm 
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Location: Pembrokeshire, UK
Any suggestions for conversion to reed switch activation rather than optical pulse from meter. I have a water meter which has reed switch activated by magnet on each rotation of gauge dial. i.e. makes every revolution.
Simon

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