"Straw testing"?????

Sounds like it would blow straws all over the place!!

Any inhouse test proceedure is fine as long as a calibrated instument (back to a traceble standard) is used for comparison and the proceedure is appropriate, reproducible and well documented.

Build your rig, do loads of tests comparing two reference meters, take the data plot the graphs, do the stats, keep the results in your QA file.
Build a 2nd reference jig...for when someone spills coffee into the first one.

Document it all and then accept your resulting promotion/bonus with good grace and buy all your colleagues cakes! (Also send me a tin of Tuna)
Del

Thank you for the support and direction. I thought it would be ok as long as I had a backed up system in place.

White or plain tuna?

Cheers.

I'm a great beilever in creating quality systems how you want them.
Always remember the ststem is there for you...not the other way around.
(And if you write the system, it is always easier to remember and comply with)

Del

Sounds good bettsd44, I've used straws as well as very thin walled heat shrink tubing to create a laminar flow element before now and it works well.

Just as long as the airflow to the input (from the fan) is uniform across the inlet to the straws.

John.