You were right, changing the scale seems like the best option.
to be sure, I got on and off five times consecutively five times and it gave a set of results in no apparent order from 83.9 to 91.8!
Moral of this story: Don't trust electronic equipment.
to be sure, I got on and off five times consecutively five times and it gave a set of results in no apparent order from 83.9 to 91.8!
Moral of this story: Don't trust electronic equipment.