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Is my Meter Clock E7 or E10 - see photos

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  • jk0
    jk0 Posts: 3,479 Forumite
    Eighth Anniversary 1,000 Posts Name Dropper
    @House Martin

    Interesting you say that about the radio teleswitch. I always wondered how accurate those things really are, and then I saw this recently

    https://www.youtube.com/watch?v=bZRdwC2U4rI

    From what I can see, the unit switches the dedicated E7 circuits on 1 hour before it switches to counting on the night rate.

    Granted it could have been fiddled with, but it is worth checking those teleswitches once in a while and ensuring the use is being counted on the correct rate.

    Reliable piece of kit though.

    Most of my rentals have a similar meter to that. It actually records at three different rates. The cheapest is 'controlled heating', which brings on the two orange neons. They just switch this on when they have surplus energy. The next cheapest is 'night rate' which brings on the two red neons. This is the same times every night for people to use washing machines etc. The most expensive is 'day rate' which is when the red neons are out.

    As you can see, it is possible to be paying 30p per unit for day rate at the same time as your storage heaters are charging at 10p. This does seem a little unfair to me.
  • CashStrapped
    CashStrapped Posts: 1,302 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    matelodave wrote: »
    I'm guessing the radio teleswitched have a bit of random delay built in otherwise the network would come to a grinding halt if all of them switched at exactly the same time.

    A whole estate (or even street) of houses each suddenly bunging on 25kw all at the same time could prove interesting.

    Yeh that was a possible reason for the hot water circuit to go on and off.

    But, that does not explain why the e7 circuits come on one hour before the E7 metering. That is a full hour of tank heating that could be done on day rate. Which is a large proportion of the hot water tank.

    They could stagger the signal after the meter is counting on the E7 rate, not before!

    Regarding it being BST or GMT, this should not matter with a radio teleswitch should it? It switches when it gets the encoded signal and I would have assumed that that would change with the clocks.

    Even if it did not, it is still getting a signal to activate the E7 circuit (storage and hot water) one hour before the the E7 metering counter is activated.

    ----

    In my mind that would mean that every so often, an E7 property should do a test

    Wait till they see the storage heater sockets come on, which means the circuit has been activated. Then, go to the meter to check that that the use is being recorded on the E7 dial.
  • jk0
    jk0 Posts: 3,479 Forumite
    Eighth Anniversary 1,000 Posts Name Dropper

    But, that does not explain why the e7 circuits come on one hour before the E7 metering. That is a full hour of tank heating that could be done on day rate. Which is a large proportion of the hot water tank.

    I explained it in the post before yours.
  • CashStrapped
    CashStrapped Posts: 1,302 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    edited 12 March 2018 at 3:03AM
    I know how the meters work. The engineer in the video actually explains that too.

    I'm not sure what you mean by "surplus energy". Do you mean when the grid is not in demand?

    ---

    That is not how the tele-switch should work. The E7 circuit (orange lights) should not normally be activated until the E7 metering (red lights) is activated. Otherwise use is recorded at the wrong rate.

    This issue in this example is that the E7 circuits comes on a full hour before it's use is recorded on the cheaper rate meter.
  • House_Martin
    House_Martin Posts: 1,462 Forumite
    I know how the meters work. The engineer in the video actually explains that too.

    I'm not sure what you mean by "surplus energy". Do you mean when the grid is not in demand?

    ---

    That is not how the tele-switch should work. The E7 circuit (orange lights) should not normally be activated until the E7 metering (red lights) is activated. Otherwise use is recorded at the wrong rate.

    This issue in this example is that the E7 circuits comes on a full hour before it's use is recorded on the cheaper rate meter.
    In that interesting Youtube vid he did mention that the teleswitch was internally adjusted and was from a Scottish location where they have a lot of odd timings with their white meter and heatwise set-ups.They will be internally adjusted for each area s published times prior to installing. I don`t think we can make a conclusion about their accuracy from just one on a bench.
    Personally I ve never come across one in my 20 years on the job, which is coming on a full hour before the published times of 12.30 am to 7.30 am in my area in S. Yorks.
    I m only around meter reading after 8 am but the ones I ve seen are all pretty much correct around the 8.30 am (BST ) mark clicking over to the day rate.
    Its important I get the rates correct with Eco 7 in the early morning so I pay attention to the timer switches and digital clocks on the Ampy meter types in the mornings.
    The old 24hr circular analogue timers have their 7 hours coming on at any time within the 24 hrs. .Only Scottish Power are interested in the accuracy of Eco 7 clocks. More than 2 hours adrift and if they are contacted they will come out to adjust/change the meter and time switch
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