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Kestrel 4000-4600
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In the Humidity Cal menu, scroll to Start 1 and press select. The line will change to say Running 1 and
the number of seconds will countdown till the first calibration measurement is taken. Once complete,
the line will display Start 1 again.
Kestrel 3000-3500 (Three-Button)
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With the screen showing C1 press the center button to start a 60 minute countdown. The screen will
flash between C1 and the remaining number of minutes till the first calibration measurement is taken.
Once complete, the screen will display C2.
Kestrel 3000 (Two-Button)
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With the Kestrel turned on and in Relative Humidity Mode, press the On and Mode button at the same
time for approximately 6 seconds to start the RH Calibration routine. The screen will display C1.
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With the screen showing C1, press Mode to start the 60 minute timer till the first calibration measure-
ment is taken. The screen will flash between C1 and the preprogramed RH calibration value for 60
minutes till the first calibration measurement is taken. Once complete, the screen will display C2.
6. Make a note of what time the calibration routine will end. (60 min for Kestrel 3000-3500 or 60-120
minutes for Kestrel 4000-4600 units, depending on what was set)
7. After ensuring the lid is closed tightly, return the jars to the case and if using, return the zipper case to
the insulated cooler.
8. After the countdown for the first calibration measurement has ended, remove the Kestrel from the 1st
jar and make sure any salt or water is wiped off.
9. Move the Kestrel to the 2nd salt jar and make sure that the jar lid is closed tightly. (For Kestrel 3000-
3500 & 4000-4600 units, the 2nd jar will be the 75.3% RH jar. For Two-Button 3000 units the 2nd jar will
be the 32.8% jar.) Return the jars to the zipper pouch and if using, into the insulated cooler as well. Let
the kit sit for an additional 24 hour equilibration period.