The rep. confused the ACFM/SCFM conversion with an equation that is used to convert an observed variable area flowmeter reading at nonstandard conditions into an ACFM reading.
SCF = ACF [(Pact*Tstd*Zstd)/(Pstd*Tact*Zact)]
Actual volumetric flow =
(Observed Flowmeter Reading)*SQRT{...