Only if interested in problem solving (or you want to be able to
operate a doofa that uses the same system when you buy one next week):

I bought an anemometer at my local DSE store.
It came without the instruction sheet.

The instrument can measure air temperature in degrees C or degrees F
and air speed in knots, mph, fps, kph, mps. It can also calculate &
display wind chill factor. It can display the average air speed over
3,5,10 or 13 seconds or the maximum air speed since last turned on.

The controls consist of two push buttons -     on/off         and
mode.

Pressing and releasing on/off once turns it on.
Pressing and releasing on/off again turns it off.
Pressing and holding on/off when off turns it on and displays all LCD
segments. This shows all the parameters mentioned above. When the
button is then released it is on.

When turned on it started up in knots and degrees F.
When I then pressed the mode button it cycled through the various time
averaging settings and wind chill setting.

No amount of button pressing would persuade it to go to other speed or
temperature units.

Being an accomplished digital watch user, even though not of the
Nintendo (tm) generation, I know all about pushing several buttons at
once and holding buttons down and ... .

Hold mode down for a long time - nope.
Turn on while holding mode down - nope.
Press mode and on together - nope.

No amount of trying would change it into the other units of
measurement.

I returned to the shop (I had been sitting outside trying it out as
LONG experience told me that Murphy would rather I take it home
untried) where they discovered that they in fact did have an
instruction sheet. One glance told me how to change ranges. I left in
embarrassment.

Q1:    How do you change ranges?

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?




        Russell

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