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clocking a meter

ed wallace
ed wallace Member Posts: 1,613
in THE MAIN WALL
need info on clocking a meter

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  • jim sokolovic
    jim sokolovic Member Posts: 439
    Measure the number of cubic feet used...

    in 3 minutes, multiply that by 20, then multiply that by the higher heating value of the gas (Natural Gas is typically around 1050, but the utility or altitude can affect that number). This is one of the methods to get the BTUH of the appliance. Make sure that only the appliance you are testing is working off that meter at this time. A modulating or step-fired appliance may change inputs during this if you do not have a way of locking it into the firing rate you want to confirm. Hope this helps.
  • Mark Eatherton1
    Mark Eatherton1 Member Posts: 2,542
    Another path to the same end result...

    You will need a stop watch (cell phones have them), a calculator (same). On all gas meters, there is one dial that shows either 1 cubic foot per revolution or 2 cubic feet or in the case of some large meters, 5 cubic feet per revolution.

    Let's use the 5 for this example. Record the amount of time required for one complete revolution, bearing in mind what Jim said about making sure only the appliance you want to clock is on line.

    Take 3600, and divide by the elapsed time. Take that result and multiply it times the cubic feet per revolution, in this case 5. You now have the cubic feet per hour that the appliance is consuming. Multiply this times the caloric content of the gas you're dealing with and you now have the BTUH inPut of that appliance.

    So, for the sake of completion, lets say that it took 46 seconds for one complete revolution of the 5 CF dial. 3600 divided by 46 = 78.26 "units". 78.26 times 5 cubic feet per unit = 391.3 cubic feet of gas per hour. Let's assume you're in Denver, where the gas has a caloric content of 830 btus/cubic foot, then 391.3 times 830 would equal 324,782 btu/hour INPUT.

    That's how I was taught to clock a meter.

    ME

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  • Unknown
    Unknown
    Ed e-mail me

    your postal mailing address and I will send you for "Free" a step-by-step procedure.
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