> Q1:    How do you change ranges?

Hold mode while turning the windmill?

> Q2    Bonus question - The instrument will mainly be used to measure
> air speed in ventilation ducts (actually untrue, but that's close
> enough). What units of speed do I intend to leave it set to. Why?

Whichever unit is smallest, to provide greatest resolution?  Unless my
maths deceive me, that would be kph...

Mike H.
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