What I do with jars of buds:
Flip the jar upside down. .. do the buds stay clumped and most if any of the buds do not fall? --keep burping once or twice a day. Tumble the jar on its side to "stir" the buds, pop the lid & take a big whiff of the jar, put the lid back on & flip upside down again. .. you should see the buds fall more freely. That's what you're looking for as to when to stop burping, and the moisture in the jar should be spot-on at this point.
My 2 cents? I don't worry too much about the actual humidity in the jar, for me the "clumping" of the buds is a telltale sign they still need to lose some moisture. For me, 62% is too wet anyway, back when I did measure jar RH I found the sweet spot for smokable buds was more like 55-ish.