A2: Chances are you'll be doing meters per second, as ventilation is
usually measure in volume per time, and distance per time is readily
converted to volume per time given the cross section of the tube.

You need to give us less information if you don't want Google to rescue us.

I expect you're using something similar to a Lacrosse EA3010, and even
if it's not the same model, the fact that there are only two buttons
and it includes the vast majority of the features you mention
indicates that it probably uses a similar interface.

You don't mention that you have to press and hold the power button to
turn it off, though.

I won't give it away for those who want to guess without looking up
"EA3010 instructions"

Though I'm curious why you went back to the shop for instructions -
perhaps if you were more of the nintendo generation you would have
checked google first?  ;-)

-Adam

On 6/12/07, Russell McMahon <apptech@paradise.net.nz> wrote:
> 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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