Nmc penetration fraction
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Description:Nonmethane cutter penetration fractions. (a) Scope and frequency. If you use a FID analyzer and a nonmethane cutter (NMC) to measure methane (CH4), determine the nonmethane cutter's penetration fractions of methane, PFCo., and ethane, PF-2/to. Perform this verification after installing the nonmethane Cutter.