reading power consumtion in real time with smart electric meter

Reed_Richards

Ectophile said:

To put it another way,

• 1 flash per second is 3.6kW,
  
• 1 flash per 2 seconds is 1.8kW
• 1 flash per 4 seconds is 0.9kW

and so on.

beer_time said:

Gerry1 said:

With all due respect, you're never going to master all the book-keeping, VAT, tax forms etc if you can't do the simple sums previously explained to you in some detail !

51 seconds/ 60 seconds = 0.85 (of a minute) X 60 minutes= 51Wh

???????????

If you mean 51 flashes in 60 seconds then that would be 51/60 flashes per second so the power consumption for that minute (according to Ectophile's formula) was 3.6 x 51/60 = 3.06 kW

Gerry1

beer_time said:

Well first off the meter in your photo is nothing like mine what so ever!

Not relevant what the meter itself looks like, it's just an example of a red LED and the associated Imp/kWh labelling that you're looking for but still seem not to have found.

Your calculation is wrong.  You've quoted Watt hours, but that's a unit of energy.  You're looking for a power rating, Watts.

The answer is 71W IF the LED is labelled 1000 Imp/kWh.

beer_time

Reed_Richards said:

Ectophile said:

To put it another way,

• 1 flash per second is 3.6kW,
  
• 1 flash per 2 seconds is 1.8kW
• 1 flash per 4 seconds is 0.9kW

and so on.

beer_time said:

Gerry1 said:

With all due respect, you're never going to master all the book-keeping, VAT, tax forms etc if you can't do the simple sums previously explained to you in some detail !

51 seconds/ 60 seconds = 0.85 (of a minute) X 60 minutes= 51Wh

???????????

If you mean 51 flashes in 60 seconds then that would be 51/60 flashes per second so the power consumption for that minute (according to Ectophile's formula) was 3.6 x 51/60 = 3.06 kW

No! I mean 1 flash every 51 seconds

beer_time

The answer is 71W IF the LED is labelled 1000 Imp/kWh.

these nothing marked on itv

Gerry1

Hard to make out the details, but if it's a Liberty 100 meter the metrology light (the red LED) is reported as flashing 3200 times per kWh.

https://forum.ovoenergy.com/smart-meters-136/what-is-the-led-to-the-right-of-keypad-on-my-smart-meter-1120?postid=5440#post5440

https://guide.openenergymonitor.org/setup/optical-pulse-sensor/

That corresponds to only 22W which would be very low for a fridge.  It suggests the fridge motor wasn't running when you looked at the meter, but 22W could be be quite normal for the total of all the standby items.

MWT

Thanks for reminding me how much easier it is to just look at the 'usage now' screen on my IHD...

beer_time

 It suggests the fridge motor wasn't running when you looked at the meter, but 22W could be be quite normal for the total of all the standby items.

I dont have a lot of stand by items running, but it will be worth doing it again making sure everything appart from fridge is switched off

But as I was told on the DIY not forum that a fridge dose not use a lot of electric on tick over, only on start up to cool the thing down

https://www.diynot.com/diy/threads/set-up-for-mobile-van-refrigeration.568932/page-8

Gerry1

MWT said:

Thanks for reminding me how much easier it is to just look at the 'usage now' screen on my IHD...

Something that smart meter project should have explained to the OP, assuming that his IHD has this functionality !

But the flashing red light (or even the spinning disc) can be very useful for people with conventional meters, especially when investigating high usage.

beer_time

That corresponds to only 22W which would be very low for a fridge.  It suggests the fridge motor wasn't running when you looked at the meter, but 22W could be be quite normal for the total of all the standby items.

maybe you should try it with yours a post back resalts

MWT

Gerry1 said:

MWT said:

Thanks for reminding me how much easier it is to just look at the 'usage now' screen on my IHD...

Something that smart meter project should have explained to the OP, assuming that his IHD has this functionality !

But the flashing red light (or even the spinning disc) can be very useful for people with conventional meters, especially when investigating high usage.

All IHDs have this capability.