Re: Kestrel 4500 DA clearification please
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jfernandez</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JamesBailey</div><div class="ubbcode-body">Is that correct? I thought the DA reading was separate from the reference altitudes and pressures, i.e. there was no setting that the user could change that would change the DA reading. </div></div>
Based on this response I saw on the Nielsen Kellerman forum, this should be the case for both the 4000 and 4500:
"Thank you for your question about the Kestrel 4000. The density altitude measurement on the 4000 does not rely on the reference values in the altitude or barometric pressure screens (what you referred to as calibration). The density altitude is a function of temperature, relative humidity and pressure. The only thing that can be changed on the unit is the pressure calibration. This is performed at the factory and is check for accuracy. Typically a factory pressure calibration will hold accurately for years.
The altitude and barometric pressure measurements rely on a reference. For altitude you need to input an accurate reference barometric pressure. For barometric pressure you need to input an accurate reference altitude. If you were going to a track with a known altitude you would enter that into the reference in the barometric pressure screen. This would give you a current barometric pressure reading which you could take and input into the reference in the altitude screen." </div></div>
Yes, that is the way I understand the Kestrel to work. DA is DA, no user input can impact it. If you are tracking straight altitude, then you need to start messing with the reference altitudes so the machine can sync up current BP with current altitude.
thanks
