Product Manual
16
Using the Calibration Kit to Check Your Unit’s Calibration Accuracy
1. Prep the salt jars and Kestrel unit as described in the section titled Preparing the Salt Solutions and
Kestrel for Calibration.
Kestrel 4 & 5 Series Units
2. Set your Kestrel to display Relative Humidity and go into the settings menu and turn o
Auto Shutdown.
3. Place your Kestrel in one of the two salt jars and let it sit for 24 hours inside the insulated
zipper pouch.
4. Remove the salt jar with the Kestrel inside and read the Kestrel’s RH reading on the display
through the jar.
Kestrel 3000-3500 Series Units
2. Set your Kestrel to display Relative Humidity and place it in one of the two salt jars, then let
it sit for 24 hours inside the insulated zipper pouch.
3. Remove the Kestrel from the salt jar quickly turn it on and return it to the jar for 35 more
minutes.
4. After 35 minutes, remove the jar with the Kestrel inside and read the Kestrel’s RH reading on
the display through the jar.
5. Repeat the process in the 2nd jar. If the dierence between the Relative Humidity reading displayed
on the Kestrel and the intended humidity listed on the jar label is outside the accuracy specication for
your unit you should consider recalibrating your Kestrel using the steps outlined in this manual.