4
Contents of the Humidity Calibration Kit
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Two jars with color-coded salt chamber labels, plastic spacer grids and sealing lids
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One jar with no spacer grid (for water)
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One vial with magnesium chloride (MgCl) salt and blue color-coded label
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One vial with sodium chloride salt (NaCl)and red color-coded label
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One RH Calibration Kit insulated bag/carry case
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One color-coded labeled measuring cup
Note: Our calibration process has changed. The changes will require more time but will improve relative
humidity calibration accuracy vs. the previous method. Please familiarize yourself with the new process.
Note: Only place one Kestrel unit in each calibration jar at a time. Attempting to calibrate more than one
unit in each jar at the same time will reduce RH calibration accuracy. If you are attempting to calibrate
multiple units the process can be overlapped so that while the first Kestrel unit is equilibrating in the
second jar, the second Kestrel unit can begin equilibrating in the first jar.
Example Recalibration Schedule
Day 1
Day 2
Day 3
8:30am
9:00am
9:00am
10:00am
10:00am
11:00am
Set up
calibration
jars-30min
Begin
equilibration
in 1st jar-24hr
1st Jar
calibration
point taken-1hr
Begin
equilibration
in 2nd jar-24hr
2nd Jar
calibration point
taken-1hr
Complete