Measuring how many kw gas appliances are using.
- Thread starter David937
- Start date
Your meter measures consumption in cubic metres M³ (1000 litres). The black numbers are M³, the red figures are decimal fractions of a M³; so the right hand red number is measuring usage in litres per second - one rotation equals ten litres of gas. The reading shown is 0.173M³ or 173 (and a bit) litres. All numbers will move eventually - like the odometer in a car; the right hand one moves the fastest.
Your gas bill will tell you how to convert cubic metres to Kilowatt-hours.
Your gas bill will tell you how to convert cubic metres to Kilowatt-hours.
Standard way to gas rate appliances on a metric meter is to measure how much gas is used in 2 minutes.
I would tell you the formula for working it out, but I can't remember these days as I just use a gas rate slide rule to do the job
Perhaps another on here will have a better memory or can look it up for you
I would tell you the formula for working it out, but I can't remember these days as I just use a gas rate slide rule to do the job
Perhaps another on here will have a better memory or can look it up for you
It's a way of measuring volume - the same as when you buy petrol.
As D_Hailsham says, it's a way of measuring volume, just as cubic metres are.
A cube with edges of 100mm can hold one litre of water - or milk, or treacle, or bleach, or gas.
A cubic metre has edges of 1000mm, ten times as much and there are 3 dimensions so 10x10x10 =1000 litres in a cubic metre
On the photo of the gas meter that you posted, the black digits read in cubic metres, and the red in litres, so for example if it read 18.437 cubic metres, that would equal 18 cubic metres and 437 litres.
Standard way to gas rate appliances on a metric meter is to measure how much gas is used in 2 minutes.
I would tell you the formula for working it out, but I can't remember these days as I just use a gas rate slide rule to do the job
Perhaps another on here will have a better memory or can look it up for you
G4U's close...i'll write the 'idiots guide' version here.
1) With no appliances operating, write down the three red numbers on your meter
2) Fire up whichever appliance you're testing at full rate and immediately start a stopwatch
3) Go to your meter and wait for two minutes to elapse
4) At exactly two minutes, write down the new three red numbers
5) Go switch off the appliance, you're wasting gas
6) Subtract the first set of numbers from the second. Multiply the resulting number by 30.
7) The number you now have is how many metres cubed per hour of gas your appliance is burning
8) To convert to Kilowatts per hour, multiply the number by 39, then divide the result of that by 3.6
Hope this helps
Yes, if you can remember that number, I remember how I was originally taught and it serves well enough...
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