Range Report Which Barometric Pressure figure should I use?

[cysoto]

I am trying to calibrate a Kestrel unit and I just found out that there are two different Barometric Pressure figures that I can choose from. One is the <span style="font-style: italic">Barometric Altimeter Setting</span> and the other one is the <span style="font-style: italic">Mean Sea Level Pressure</span>.

Which of these two units should I use to calibrate the instrument?

 

[mouse07410]

Re: Which Barometric Pressure figure should I use?

If you know what's good for you - don't mess with Kestrel's calibration. It's good-to-go from the factory.

 

[blklabs]

Re: Which Barometric Pressure figure should I use?

Check out this link on Lindy's website.

Barometric Pressure and Ballistic Software

 

[desertHK]

Re: Which Barometric Pressure figure should I use?

Any idea on how to reset it to factory setting?

 

[cysoto]

Re: Which Barometric Pressure figure should I use?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mouse07410</div><div class="ubbcode-body">If you know what's good for you - don't mess with Kestrel's calibration. It's good-to-go from the factory. </div></div>
After reading the article that blklabs suggested, I finally understood what was I doing wrong. I also noticed that, because of my location (Denver), this Kestral unit will not let me input the Station Pressure reading. It will not allow me to input any pressure under 25.00 inHg. It seems like I am limited to using the corrected or Altimeter Setting.

BTW, THANK YOU blklabs for the link!! This article helped clear any questions about barometric pressure and density altitude that I had.

 

[blklabs]

Re: Which Barometric Pressure figure should I use?

Thank Lindy, he is the man!

 

[mouse07410]

Re: Which Barometric Pressure figure should I use?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cy Soto</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mouse07410</div><div class="ubbcode-body">If you know what's good for you - don't mess with Kestrel's calibration. It's good-to-go from the factory. </div></div>
After reading the article that blklabs suggested, I finally understood what was I doing wrong. I also noticed that, because of my location (Denver), this Kestral unit will not let me input the Station Pressure reading. It will not allow me to input any pressure under 25.00 inHg. It seems like I am limited to using the corrected or Altimeter Setting.</div></div>
Kestrel is supposed to <span style="text-decoration: underline">output</span> Station Pressure, not <span style="text-decoration: underline">input</span> it. If you know what it is beforehand, why spend money on a Kestrel - cheaper wind meters do exist.

It seems to me that you're not using Kestrel optimally. But then it's your money and your operation, have a blast at it.

 

[Graham]

Re: Which Barometric Pressure figure should I use?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mouse07410</div><div class="ubbcode-body">If you know what's good for you - don't mess with Kestrel's calibration. It's good-to-go from the factory. </div></div>The altitude window is not always set to zero. Set the altitude to zero. Then calibrate the unit using an accurate barometer reading. I use a location with a known altitude, like an airport (or R.O.), then take the measured barometer at the airport (or NAS nearby). Mine was not set-up correctly at the factory.

 

[mouse07410]

Re: Which Barometric Pressure figure should I use?

Graham, out of curiosity - how big was the pressure/altitude error in your Kestrel unit as it came from the factory?