Zero a digital electricity meter

[DetlefSchmitz]

It will probably detect this and continuously display an indication that fraud has been detected.

 

[gman76]

It was (sort of) a tongue in cheek question, but I imagine you're right.

What about an analogue meter?

Edit: It would just work as normal wouldn't it? Because it's AC.

 

[flameport]

What about an analogue meter?

Many analogue meters will run backwards if the wiring is swapped.

Digital ones will have some visual indication such as 'rED' in the display (for reverse energy detected) or illuminate the LED a different colour such as green, so that when the meter is next read, the fraudulent use can be detected.

Very common to see such indicators now in ordinary use where solar panels are installed.

 

[bsr]

Hi, it should not be possible to zero the meter as this is prohibited by the MID (Measuring Instruments Directive (MID 2014/32/EU) annex 1 section 8.5 if you really want to know).

 

[gman76]

Many analogue meters will run backwards if the wiring is swapped.

That surprises me.

 

[Jackrae]

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

Maybe the tide was in when they measured it

 

[clifford1]

These claim to have been zeroed:
https://www.ebay.co.uk/itm/100A-Ele...-phase-electric-watt-KWH-ZEROED-/362919912127