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Clocking a 2# Gas Meter

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Zman
Zman Member Posts: 7,569
in THE MAIN WALL
A while back there was a discussion about adjusting the BTU content of natural gas in a 2# system.
Someone posted a formula that even allowed for a high-altitude adjustment.
I know I saved the darn thing but cannot find it.
Does anyone remember or know the formula?
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein

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  • ratio
    ratio Member Posts: 3,626
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    Check here: https://forum.heatinghelp.com/discussion/comment/1617339#Comment_1617339
    Zman
  • Mike_Sheppard
    Mike_Sheppard Member Posts: 696
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    (Atmospheric pressure + gas pressure) / base pressure = pressure correction

    Atmospheric pressure = the atmospheric pressure at your location.

    Gas pressure = the gas pressure entering the meter

    Base pressure = the referenced atmospheric pressure that your gas supply company uses. Most of the time this is equal to atmospheric pressure, but sometimes it is not.

    For example, where I live the atmospheric pressure is 14.73. Washington gas uses a base pressure of 14.92.

    So my pressure correction at 2 psi would be:
    (14.73 + 2) / 14.92 = 1.12
    Never stop learning.
    Zman
  • Mike_Sheppard
    Mike_Sheppard Member Posts: 696
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    Never stop learning.
  • Zman
    Zman Member Posts: 7,569
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    @Mike_Sheppard
    Thanks for the follow up.
    This formula checks out with an estimate I made for a spread sheet a few years ago using an actual high and low pressure meter in series. High altitude makes a big difference in the correction factor.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein

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