I just bought this meter about 5 months ago and went to use it for cfm readings for the first time a couple weeks ago and noticed a problem.
If I put it in the CFM mode and let the meter sit for a while it starts reading cfm. the reading starts low and then creeps up. I can't find my notes for the test I did. But if anyone else has this meter can you try this test. You need to let it sit for about 10 minutes before it starts to climb. At least mine.
I called Fluke and talked to them about this and they said they would get back to me and never have.