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R e l a t i v e H u m i d i t y C a l i b r a t i o n K i t
F o r c a l i b r a t i n g t h e f o l l o w i n g K e s t r e l M e t e r s
Model Numbers
3000, 3500, 4000, 4200, 4250, 4300, 4400, 4500, 4600
(Not to be used for calibrating Kestrel 5 Series units or Kestrel DROPs)
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Summary of Contents for Kestrel Relative Humidity Calibration Kit
- Page 1 F o r c a l i b r a t i n g t h e f o l l o w i n g K e s t r e l M e t e r s Model Numbers 3000, 3500, 4000, 4200, 4250, 4300, 4400, 4500, 4600 (Not to be used for calibrating Kestrel 5 Series units or Kestrel DROPs)
- Page 2 ● ● ● ● ● ©2017 Nielsen Kellerman Co. Kestrel, the Kestrel bird, NK, Nielsen-Kellerman and the NK logo are registered trademarks of the Nielsen-Kellerman company. Please refer to Standard Practice for maintaining Constant Relative Humidity by Means of Aqueous Solutions ASTM Designation E104-85 (reapproved 1996) for additional information.
- Page 3 The Kestrel should be recalibrated if the RH sensor has shown drift in its RH measurement. The Kestrel RH sensor is specified to develop less than 2% drift over 24 months. You may return your Kestrel to NK for Factory Recalibration of the relative humidity and related measurements. Recalibration is available with and without certification of NIST traceability and calibration stickers.
- Page 4 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.
- Page 5 Preparing the Calibration Salt Solutions » For your first use only, you will need to add water to the provided salts to prepare the saturated salt solutions for the calibration chambers. » Note that it is important not to cross-contaminate either salt solution with the other salt. For this reason, every item is color-coded.
- Page 6 Kestrel 3000-3500 body and that the lanyard cannot come in contact with the salt solution. 12. Only calibrate one Kestrel unit in the jar at a time. Attempting to calibrate more than one unit at a time will reduce RH calibration accuracy.
- Page 7 Kestrel 3000 (Two-Button) » With the Kestrel turned on and displaying the Dew Point measurement (not Relative Humidity), press the On and Mode button at the same time for approximately 6 seconds to set to the RH calibration values. The screen will display P1.
- Page 8 75.3 is showing by pressing Mode to change the value of the flashing digit and pressing On to move to the next digit. (In Two-Button Kestrel 300 units, the values for P1 and P2 are reversed from oth- er Kestrel units.) Once the tenths’...
- Page 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.
- Page 10 The screen will flash between C2 and the preprogramed RH calibration value for 60 minutes till the second calibration measurement is taken. 11. 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.) 12.
- Page 11 Set your Kestrel to display Relative Humidity. For Kestrel 4000-4600 units, go into the settings menu and turn off Auto Shutdown. Place your Kestrel in one of the two salt jars and let it sit for 30 min inside the insulated zipper pouch. Remove the salt jar and read the display through the jar.
- Page 12 Kestrel® Weather and Environmental Meters are designed and manufactured in the USA NIELSEN-KELLERMAN 319024_2_17.04.25...
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