IBC SL 40-399 G3 - Clocking the Meter (Natural Gas)

Clocking the Meter (Natural Gas)
1. Turnoffallotherappliancesandpilots.
2. Turnontheboilerandsettheboilertohighfire.
3. Ensuretheboilerhasalargeloadtoheat,sothattheboilerwillnotshutoff.
4. WithaStop-Watch,recordthenumberofsecondsforthesmallestdialtomake1fullrevolution.
5. CFH=(3600xDialSize)/Seconds.
6. CFHx1000(checklocalBtucontent)=InputBtu’s.
 Note
For2PSImetersmultiplyCFHx1.097
ForMetricmetersmultiplyCFHx35.3
For2PSImetricmetersmultiplyCFHx1.097x35.3
ForAltitudeabove4,500’deduct2%per1,000’ofaltitudefromtheInputBtu’s.
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