ABSTRACT
John Chubb Resistivity may be a useful parameter for 'continuous' operations but a charge relaxation measurement will be relevant in practice. It can be used with semi-continuous processes such as walking on a carpet. Upon stopping, charge relaxation competes with charge generation. I also suggest that charge relaxation (charge decay) measurements are a much easier way to assess insulating-type layer and powder materials. It is also worth noting that there are situations where neither charge decay nor resistivity necessarily indicate charge limitation processes. An example is the increase in body voltage on getting out of a car. In that, and such situations what needs to be measured is what is actually relevant i.e. body voltage. This emphasises the importance of assessing from the point-of-view of the end-user.
