Test equipment used: Cooper-Atkins SRH77A for delta T; Fluke 902 for VAC and Amps; Fieldpiece SDMN5 w/ S.P. tips for TESP; and Fluke 922 for air volume.
AHU has 7x17 (I.d) duct as supply w/ common return and a 1/6 h.p 850 rpm evap. Fan motor.
Fluke 922 readings w/ PT12 static/pitot tube readings on high speed:2171 cfm/low speed:1750 cfm
Heat Rise Method on high speed: 2565/low speed 1324 cfm
Amps on 7.0 elec. heat: 26.5
Delta T on high speed 8*F/ low speed 15.5*F
Can somebody please tell me where my mistakes are on the heat rise method? I'm almost positive the Fluke 922 Errors are user related as this is not a traversal, just really 6 readings averaged into 1. However, the 922 doesn't seem close either... Frustrated that either of these don't even sound close to the 400cfm p/ ton on a 25,000 (2 ton h.p)