I have taken to doing the salt test (be it the actual test or the kit) with everything in the humidor. Stabilization occurs much quicker and, with the dryness here, I was always coming up low ~ 3-4% until I started doing the test in the humidor.

I have two of the adjustables. One in my coolidor w/70% beads, one in my humidor with Oasis at 65%. I can swap hygrometers and they both equilibrate to the new location.