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meters

The metre (Commonwealth spelling) or meter (American spelling; see spelling differences) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in the International System of Units (SI). The SI unit symbol is m.
The metre is currently defined as the length of the path travelled by light in a vacuum in 1/299 792 458 of a second.
The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, so the Earth's circumference is approximately 40000 km. In 1799, the metre was redefined in terms of a prototype metre bar (the actual bar used was changed in 1889). In 1960, the metre was redefined in terms of a certain number of wavelengths of a certain emission line of krypton-86. The current definition was adopted in 1983 and modified slightly in 2002 to clarify that the metre is a measure of proper length.

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  1. bright spark

    Commercial in line gas meters

    Have a customer who has several buildings/ boiler houses fed off the one meter. He now wants to know how much gas each building is using. He's quite restricted for space, so rather than fitting the'normal' type was going to fit inline type meters as they take up little space and don't require...
  2. P

    smart meters

    Local training college (brookhouse in west yorkshire) are banging on about smart metering saying its going to be massive and earning potential is through the roof etc anyone got any information or experience with them? they saying that every home is going to have one but i heard that they are...
  3. S

    water meters

    friend of mine has moved into a new house and has been refused a meter the stopcock on the pavement is only 300mm from the two just inside her boundary one of which obviously feeds under her property to the next door house does anyone know if she can have an internal one fitted.I have in the...
  4. M

    Under Floor Heating Flow Meters Silted Up

    Hi, I have a UFH system with a GSHP. The UFH system has 3 manifolds all with glass flow meters. The flow meters on the manifold nearest the GSHP are turning brown. The system was installed in mid 2010 and there were signs of brown in the flow meters in 2011 but the flow meters are nearly...
    • McYoda
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    • brown floor flow heating installed meters system under under floor heating
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  5. G

    Hvac multi meters

    Found this whilst shopping for the fluke 116 for all you waukee fans Milwaukee 2206-40 Fork Meter for HVAC/R
  6. T

    Landlord Gas Safety Checks

    Do you need your CCN1 and appliances to do landlord gas safety checks, or is your CCN1 enough? Cheers
    • twitchboy
    • Thread
    • appliances checks gas gas engineer gas safe register gsr landlord meters safety ticket
    • Replies: 24
    • Forum: Plumbing Jobs | The Job-board
  7. J

    Paste for gas meters

    Hi all, As we all know gas pipe should be sealed as it comes into the house. In the gas meter there is some paste you can use, what is this called?
  8. N

    2 GAS Meters?

    Hi all, (cant seem to go down a line so excuse the massive paragraph) we was working in a property which is a semi detached being knocked in to 1 house, there is a combi in each house along with a gas meter would this have to be changed as its 1 dwelling? as I'm currently doing my gas course it...
  9. M

    Tundish on unvented cylinder

    Hey is it usual for a tun-dish to splash alot of water out when testing the discharge of the pressure or temperature relief on full? There's no problem with the discharge pipe over 300mm before first bend after tun-dish and less than 9 meters in 22mm.
  10. the_d_o_t

    U16 meter - 2 combi boilers - meter about 25 meters away from house!

    hi guys, got called to look at a job yesterday, big house being converted into 2 flats on one meter but the meter is about 25-30 meters away from the house in a meter housing away from the property. the pipework at the meter is in 35mm and pops up in 22mm in the house, and i have no idea where...
  11. O

    Supplying new gas connections and meters ?

    How does a business go about this ? Apart from the obvious national grid and united utilites for water there are a few small private companys that provide the services of new connections and meters etc. now how would a business go about that ? Because in my area there isnt really a business...
  12. P

    Water meters

    Quick question guys. Got a customer with low working pressure on their water main. 4 bar standing, 0.5 bar working. It's got a 30kw combi installed on a half inch iron main... I've checked for blockages/ turned down stop cocks. What sort of working pressure will the water board guarantee (is...
  13. M

    Idiots guide please.

    Hi, I've recently had the meters changed to pre-pay meters and unfortunately the gas ran out overnight. The installer didn't show me how to light the pilot light and I'm really struggling as I am not mechanically/technically minded at all. It is a Baxi Bermuda 552. I'm sure it's...
  14. M

    sizing a radiator for a loft

    Hi can anyone help give the correct size radiator/s or btu output require for a loft space 4.7 meters long, 5.2 meters wide, and 2.7 meters at the highest point, is a pitched roof. Thanks for any help.
  15. J

    Multi meters

    What one do you use ?
  16. J

    New Gas Connection over 40 meters

    Hi all - i'm about to move into a new house that currently has oil central heating - however, it needs a new oil tank and boiler - before I spend c.£5k I wanted to consider installing gas as an alternative. Gas is in the road outside the house but the house is 70 meters up a private road...
  17. C

    gas meter advice please

    I have just passed my level 3 gas diploma within cookers and meters and want to get into meters install/exchange. As I would need to gain experience within meters and as most of meters install vacancies advertised are through agencies I was wondering how I would go about getting experience on a...
  18. C

    Looking for voluntary position with gas meter engineer to gain metering experience

    I have just finished my level 3 gas diploma within cookers and meters with boilers and gas fires to add-on soon, I'm looking for a voluntary position to gain more onsite experience within gas meters alongside a gas meter engineer. London area
  19. B

    gas meters - so whats classed as supported?

    Hi guys, After readng that the irlam explosion was prob caused by the gas meter being in-adequately supported (pile of bricks) which, caused a previous fracture to become larger, what would you say is classed as supported? we see loads of meters that are a few inches from the floor. Is it ok...
  20. M

    gas flow meters for purging

    What do you use? I do quite a bit of catering work but not enough yet to justify purchasing a turbine meter at around £700. it shows this example on bes.co.uk with a standard diaphragm meter but don't you have to monitor the velocity in real time or is it acceptable to calculate afterwards?

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