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Bob is correct, the sensor offset is the parameter that needs
adjusting. I usually set this to one less than the sensor reading at
zero airspeed but setting them equal is OK as well. As always, When
all else fails, read the instructions.
Tracy
>
> >
> > > Bulent Aliev wrote:
> > > > Here
is another question for the electronics gurus.
> > > > I
noticed on the EM2 TAS is always 15-18 K while the plane is still? I
>
> > > thought it is supposed to be zero? If so, I could not see a way
to
> > > > adjust it?
> > > > Buly
> >
> >
> > > That number happens to be somewhat close to the
value of the
> > > acceleration that a prop introduces to the
air. Where is your pitot
> > > located? That may be
what the sensors are actually seeing.
> > >
> >
>
> My pitot is in the nose (CZ MK-IV) and the prop at the back. Plane
sitting in the hangar. No air movement.
> > Buly
> >
> Hi Buly,
>
> I'm pretty sure there is a calibration
setting in the EM2. Mine wasn't
> zero either and I seem to recall
adjusting it. I'll have to look thru
> my notes to see if I can
find it.
>
> Bob W.
>
Air speed is channel 14 in
the calibration menu (Hold 3, press 1). When
you first select the
channel, take a look at the current value of the
sensor. Change the
sensor offset to match that value. That will give
a zero reading on
the display. You may still need to adjust the scale
factor, but will
need some flying data to know. OAT and altitude need
to be correct
also.
Bob W.
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours
Total Time and holding
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