Standard temperature for flow readings

[GordonE]

Hi!
I am trying to figure out at which temperature the standard CFM is measured.

I use a calculator () to get my calibration flow plate numbers. The CFM changes with the temperature, so what is the correct standard temperature to use? If i use the incorrect temperature, the readings should be slightly off.

Thanks Gordon

[bruce]

Temp: 70F
Baro: 29.92

This is what I use

[slracer]

Gordon, Per the 1976 US Standard Atmosphere, the SL standard day is 59*F. However, not every industry uses the US Standard, so

Doug

[GordonE]

Thanks for the replies!

I have seen a youtube clip from A VW tuner , after 30s they show their program, the flow is displayed as SCFM, standard CFM I guess. I have also seen a flow diagram from there, and it displays both ACFM and SCFM.

Then I guess I should get the standard CFM values for my plates then.

I havnt herd much about wich standard that is used before. If I dont have a standard to follow, its hard to be accurate with other benches out there!


Thanks Gordon