Smart meters - a question

[Quick note - I am typing this on my tablet using tightVNC because I still haven't found a news client on Android which suits me.]Anyway does anyone know how gas smart meters are powered? Either they need mains electric or have a battery which will need changing by the not-meter- reader. Sorry about the lack of line feeds. Feature of the VNC client probably. Cheers Dave R
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David WE Roberts wrote:

In general, I think a long-life D-cell, the one in mine is supposed to last ten years e.g.
<http://uk.rs-online.com/web/p/d-batteries/0596624
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On Wednesday, November 2, 2016 at 10:18:17 AM UTC, Andy Burns wrote:

I'm also intrigued how the modern PAYG card gas meters are powered too; these not only have the (back-lit) display and metering but appear to power a solenoid gas valve, that gives a satisfying 'thump' more credit is added. But no mains elec connection.
So does this poor battery have to hold the solenoid open continuously (while in credit) for years?
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simon mitchelmore wrote:

I'd have thought the solenoid would latch the disconnection valve in either the on or off position, and only need energy to change position?
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You'd use some form of stepper which switches off after moving. A bit like the relays in a battery operated programmable thermostat.
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On 02/11/2016 10:13, David WE Roberts wrote:

On a point of detail, current thinking is they will change the meter rather than change the battery in the existing meter.
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On 11/2/2016 10:27 AM, Robin wrote:

just like pacemakers, then...
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On Wed, 2 Nov 2016 12:21:45 +0000, S Viemeister

And iThings.
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Graham.

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David WE Roberts wrote:

Some years ago a gas meter with LCD display was fitted to my house. A year or two later it was swapped for an old fashioned mechanical one, apparently because those responsible (I've long lost track of who now has the contract for this aspect) for its maintenance didn't want to have to replace batteries.
Chris
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Chris J Dixon wrote:

There is a button you can press on my smart gas meter to illuminate the display, following installation I think I've pressed it twice and a meter-reader has pressed it once, beyond that it's only used for short distance (wireless M-Bus?) communication between the gas and electricity meters, once every 30 minutes.
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on 02/11/2016, Andy Burns supposed :

Plus communication via the mobile network, to your supplier once per day with the stored meter readings.
Battery life is a moot point anyway - at the moment, if you change suppliers, likely the meter will not be compatible with your new supplier, in which case a new meter will be needed anyway.
My OVO SM's were only installed in June and as I habitually get new quotes at the end of my supply contract, I am in the process of moving to First Utility. Once moved over, I will re-apply for replacement SM's - rinse and repeat.
You really couldn't make it up - £11Bn wasted. When will these companies ever learn - loyalty and keeping those customers counts for a big saving for them? The more customers shop around and move regularly, the sooner the (special offers for new customers) bubble will burst.
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Harry Bloomfield wrote:

No, that is done by the electricity meter, for both gas and electricity readings, and only once per month in my case.

Or you revert to reading by the Mk1 eyeball.
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Andy Burns formulated the question :

Sorry, yes you are correct.

That part I am dreading, because the reading displayed swaps so rapidly you don't get time to read it - so it can take several attempts.
What does surprise me is that the indoor display (mine at least), doesn't show the actual meter reading. Another issue I have found, is that it shows the total energy cost (£ and p) since it was installed, on the tariff I was on at that time. It is unable to show what you have paid/still owe or in credit. I'm on credit, rather than the pre-pay thingumy.
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Harry Bloomfield wrote:

Use a digital camera?

Seems odd, mine does.

It's just a guesstimate of cost, probably using outdated price/unit and with no concept of discounts, or actual payments made.
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After serious thinking Andy Burns wrote :

I might have to resort to that >:|

If it does, I have not been able to find it. It is a Secure Pipit 500.
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Andy Burns formulated on Wednesday :

I meant to add...
You can choose the reading frequency when you apply for the SM's. Mine store the values every 30 minutes, then sends them to the supplier once per day at around midnight. Next day I can log into OVO's site and see what was used, with a 30 minute resolution, going back to June [1].
For the current day, if the indoor unit is powered, I can see the same consumption stored data as it happens, or see instantaneous values.
[1] that proved useful recently, when I decided to swap all of my most used lamps, over to LED's - there was a large dip in the consumption graph after the switch over, despite the darker nights closing in.
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On 02/11/2016 12:50, Harry Bloomfield wrote:

The gas meter doesn't. You can't get a gas smart meter without and electric smart meter from any UK suppliers AFAIK.

I switched recently and they can't remote read my smart meter but they won't swap it (not that I have asked). The remote display still works.
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My energy supplier offers both Electricity and Gas smart meters. maybe the gas meter only talks to its partner.

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On Wed, 02 Nov 2016 13:31:42 +0000, charles wrote:

From various sources (not guaranteed accurate) there is a smart hub associated with the smart electricity meter and this is the point of collection and transmission of data.
So yes, logically, the gas meter can't operate without the electricity smarts.
Probably why they are targeting people on dual fuel first.
Cheers
Dave R
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No chance where we live! No mobile coverage.
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