It makes great sense to me to check your hygrometers for accuracy of their displays, for many reasons. As a new contemporary personal use grower, I've never really needed to personally use a hygrometer in such a precise fashion as many warrant to achieve safe and successful drying and curing exercises. As a scientist, I do not dispute those principals.
I've watched many online videos and read with interest, the recommendations and guidance suggested to use the "salt test" method of examining and adjusting (where possible) hygrometer accuracy. I acquired 5 Caliber IV hygrometers from Amazon and they remarkably read within 1%-2% rh of each other out of the box. Still, if possible, I'd like to be more confident of the accuracy and consistency of the measurements and display of the devices. No disrespect intended, one thing I've noticed by purveyors or supporters of the technique is that some say the test requires fairly precise measures of the salt and added water, while others indicate very little materials precision seems to be necessary. To me that stands out as an anomaly.
I've only completed one run (have the second test going now) of the salt test and after the sample sat overnight in a tightly zipped sandwich size baggie, the reading was 68%. That would suggest roughly a ten percent error in that Caliber's accuracy. I took the same hygrom and tossed it in a baggie with a couple of Boost and Boveda 62% packs and the hygrometer reads 62%. Currently a second hygrom is in the same salt test baggie used with the first hygrom, and is reading 67% (though it's only been a couple of hours since I put it in there).
I have my own thoughts about the experiment so far. I just thought I'd toss this out there for the community to consider and respond.
Thanks in advance for your input.
I've watched many online videos and read with interest, the recommendations and guidance suggested to use the "salt test" method of examining and adjusting (where possible) hygrometer accuracy. I acquired 5 Caliber IV hygrometers from Amazon and they remarkably read within 1%-2% rh of each other out of the box. Still, if possible, I'd like to be more confident of the accuracy and consistency of the measurements and display of the devices. No disrespect intended, one thing I've noticed by purveyors or supporters of the technique is that some say the test requires fairly precise measures of the salt and added water, while others indicate very little materials precision seems to be necessary. To me that stands out as an anomaly.
I've only completed one run (have the second test going now) of the salt test and after the sample sat overnight in a tightly zipped sandwich size baggie, the reading was 68%. That would suggest roughly a ten percent error in that Caliber's accuracy. I took the same hygrom and tossed it in a baggie with a couple of Boost and Boveda 62% packs and the hygrometer reads 62%. Currently a second hygrom is in the same salt test baggie used with the first hygrom, and is reading 67% (though it's only been a couple of hours since I put it in there).
I have my own thoughts about the experiment so far. I just thought I'd toss this out there for the community to consider and respond.
Thanks in advance for your input.
