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Zero a digital electricity meter

Discussion in 'Electrics UK' started by macsco, 16 Mar 2020.

  1. macsco

    macsco

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    [​IMG] Bought a Landis E110 digital meter, thought it was zeroed, but not so, when it came.
    Is it possible to zero it in house? Or needs specialist kit?
    Thanks.
     
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  3. DetlefSchmitz

    DetlefSchmitz

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    No - not possible for mere mortals.
    And with the proper kit, no-one is going to give you the password.
     
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  4. macsco

    macsco

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    DetlefSchmitz
    Thought so, but was ever hopeful. Can move on.
    Thanks for the rapid answer.
     
  5. nickjb

    nickjb

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    We recently had a new supply and a "new" meter supplied by the electric co. The meter was used and not zeroed. They just recorded the number and billed us from that value.
     
  6. JohnW2

    JohnW2

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    Indeed. Measurement of an amount of electricity usage will always depend upon subtracting some previous measurement, so I don't see why there would ever be a need, or point, in zeroing a meter.

    There's not even an 'aesthetic' reason, since, after the initial very brief period after it's first installed, even a 'zeroed' meter will not show zero again for a very very long time (and then only transiently).

    Kind Regards, John
     
  7. DetlefSchmitz

    DetlefSchmitz

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    In fact meters often come with a small number showing which is caused by testing, so should be considered a good thing. PV installers will usually write down a small positive amount as the initial reading (even when zero), because it seems the value zero often leads to extensive enquiries from the electricity company.
     
  8. conny

    conny

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    That's because most people don't class zero as a valid number, however, in accounting zero is used as a number and comes in very useful when working out formulas/equations to a set number of decimal places.
     
  9. JohnW2

    JohnW2

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    Indeed - just like car odometers. Mind you, with many things, if it's factory testing one is talking about, they quite often 'reset to zero' after the testing. It's subsequent (post-factory) testing (just like the 'delivery miles' of a car) that most often leads to the 'non-zero' readings when one first sees them.
    That sounds very credible.

    I don't know whether there was ever any truth in the suggestion, but I was brought up to believe that when they initially 'measured' (well, more like 'estimated') the height of Everest they got an answer of exactly 29,000 feet - but that, since that looked 'too round' for anyone to regard it as credible as an accurate measurement, they added on a little, and told the world that it was 29,028 feet!

    Kind Regards, John
     
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  11. DetlefSchmitz

    DetlefSchmitz

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  12. EFLImpudence

    EFLImpudence

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    Actually they originally said it was 29,002 feet.
     
  13. JohnW2

    JohnW2

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    Oh - I've never seen that figure - it was certainly always said to be 29,028 during my formative years.

    Are you suggesting that 29.002 was the actual figure that they had 'measured' - or was it, again, a measured figure of 29,000 with a bit added to to 'aid credibility'?

    Kind Regards, John
     
  14. EFLImpudence

    EFLImpudence

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    No, exactly 29,000 was measured and for the reason you stated it was reported as 29,002.
     
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  15. EFLImpudence

    EFLImpudence

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    It's continually rising because of the reason it is there in the first place, and, apart from one site which says 29,035, is reported now as being the 29,029 - which might be considered more unlikely than the original exactly 29,000. :)
     
  16. JohnW2

    JohnW2

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    Indeed. I must say that I thought it had risen a lot more than that in the past 70 or whatever years.

    Kind Regards, John
     
  17. gman76

    gman76

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    If you reverse the input/output & pass some current through it, will it run backwards?
    Similar to the Ferrari in Ferris Bueller's day off.
     
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