Hygrometer Calibration Wierdness

TomF · 03-28-2015, 04:48 PM

OK here is the situation:

I have 3 hygrometers:

#1 is a digital that I have checked with the salt test and it came out at 75% dead nuts. When I put this hygrometer in my humidor with 65% HF beads it reads right on at 65%.

#'s 2 and 3 are HydroSet II digital hygrometers which I recently bought. I salt tested both of them over the course of the past few days and have gotten them dialed in to 75% using the same salt test as I did #1. I am using this setup to do the test, a small glass dish with a clip-on lid that is airtight:

However, after calibrating them to 75% with the salt test, when I put either or both of the two new HydroSet hygrometers into the humidor right next to the one that I know is correctly calibrated, they both read 5 to 7 points lower than # 1. If I put any of them back into the salt test dish and wait, they all come right up to 75%.

Any ideas as to what may be going on here?

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03-28-2015, 04:48 PM	#1
TomF Just in from the Storm Join Date: Mar 2015 First Name: Tom Location: New York Posts: 28 Trading: (1)	Hygrometer Calibration Wierdness OK here is the situation: I have 3 hygrometers: #1 is a digital that I have checked with the salt test and it came out at 75% dead nuts. When I put this hygrometer in my humidor with 65% HF beads it reads right on at 65%. #'s 2 and 3 are HydroSet II digital hygrometers which I recently bought. I salt tested both of them over the course of the past few days and have gotten them dialed in to 75% using the same salt test as I did #1. I am using this setup to do the test, a small glass dish with a clip-on lid that is airtight: However, after calibrating them to 75% with the salt test, when I put either or both of the two new HydroSet hygrometers into the humidor right next to the one that I know is correctly calibrated, they both read 5 to 7 points lower than # 1. If I put any of them back into the salt test dish and wait, they all come right up to 75%. Any ideas as to what may be going on here?