As I know, small values of bandwidth for slow processes, and bigger values, correspondingly, for fast. For CV (with sweep rate 10-20 mV/s) I usually used 6, for pulse techniques (1-100 ms) - 7 or 8. Potentiostat Biologic VSP-300
Thank you, I agree with you. it is a simple way of describing the situation. I have tried to read some literature about this, but generally the explanations are quite complex.