For calibration you will have GDV Accessory Pack with the following items: calibration stand; Ti insert; cable; pack of thing glasses.
To have reproducible reliable data both for human tests and for Sputnik you need to make calibration in the following situations:
1. You move from one climate zone to another.
2. Full moon, new moon.
3. Strong change of weather conditions.
4. Change of seasons.
Parameters of Bio-Well are sensitive to the humidity of air, so if you expect
their change, you need to make calibration.