No, this is not right when the parameters of the calibration cylinder are so different.
If you have done the calibration according to the instructions - https://youtu.be/rZYQWDPW14w
- then variability of the Energy parameter should be within 5%. But it depends on the place where you are doing it. In some places on this planet Earth variability of the signal is higher than in another.
In normal places it should fit into 5%. In abnormal places (with geopathic stress, for example) it can be 10% or even more.
So please try the same in another location and see what happens.