How To Calibrate a Digital Hygrometer. Calibrate your hygrometer accurately with the Boveda One-Step Calibration Kit. Upgrading to a digital hygrometer is not an option but they are unsure if their analog hygrometer really does its work. I put both BB’s in a bag along with my Hygroset digital hygrometer. With its competitive price point that rivals even basic digital hygrometers, the Boveda Butler is a cigar enthusiast’s dream come true. It was time to recalibrate my to Boveda Butlers so I went online and bought a bunch of 32% and 75% Boveda packs. I’d previously only done the 1-point calibration at 75% but thought I’d give the 2-point process a go. Well, calibrating it is easy. For most analog hygrometers, simply adjust the needle to read 75% on the gauge by turning the screw on the back of the hygrometer with a small screwdriver. Thread starter FH Finster; Start date Feb 15, 2015; FH Finster. To calibrate a digital hygrometer, you need a soda cap or small dish, table salt, a small airtight bag or container, and of course, a digital hygrometer. Includes a 75 Degree Humidification Pack, and instructions. Agreeing with you Bob. Buy a boveda pack at the same RH you want to run your humidor. let sit 36 hours, no kidding - 36 hours or more. Many digital hygrometers can be adjusted with a button. in a tank) to get the actual relative humidity. Case 1: After sitting in the bag for calibration, my hygrometer read 72 percent. For best accuracy, you want to calibrate your hygrometer with a reference that is close to the readings that you expect, so in most cases I'm thinking 65% would be closer to most people's target range than 75%. I have a small 72 boveda pack. Calibrate Hygrometer w Boveda 72? What I don't know is if Boveda's 75% calibration packs are somehow more accurate than their regular 65% packs. From Boveda. Rating - 100%. If your hygrometer is reading below or above 75%, you will need to adjust the reading to register 75%. Feb 15, 2015 #1 Im feeling lazy and cheap. Joined Dec 29, 2014 Messages 709 Location Queens, NY. I will now add 3 percent to the readings I take on the hygrometer (e.g. For this procedure, you will need a Boveda calibration kit (click on the link to get it from Amazon). For added accuracy, do a 2-point calibration with a 32% RH Boveda One-Step Calibration Kit (sold separately) It should have read 75 percent, so the difference is 3 percent. Double bag (ziplock) the boveda pac and the hygrometer. Put the hygrometer or humidity sensor in the airtight high density bag. The hygrometer should read 75%. 20 0 0. Although there was an admittedly shaky start, the software issues have been ironed out and the Butler is now an effective and reliable tool. Put a piece of tape on the xikar that says -2% Subtract 2% from the reading. Case 2: After calibrating in the bag, a hygrometer read 80 percent. The One-Step Calibration Kit utilizes Boveda's 75.5% or 32% relative humidity standard, which is widely used and accepted by chemists and lab professionals to determine the accuracy of any hygrometer (also known as the "salt test"). If the xikar doesn't read what the boveda pac is - say it's a 65% boveda pac and the xikar says 67. An analog hygrometer is mechanical and needs maintenance and some calibrate occasionally. Close and check each day; Get an accurate reading in 24 hours – if the hygrometer doesn’t read 75% RH, adjust by the number of points it’s off, then re-test. Can't I just toss it into a ziplock w the hygeometer and see how close it gets to 72? Part I – Using Boveda to Calibrate Hygrometers Posted on May 12, 2020 by Jay Lawrence Leave a comment Editor’s Note: This is not a paid endorsement of or a solicitation for any of the products mentioned in this article and 99 Cigars neither sought nor received compensation from any brand or company whose products are featured.