Monroe Electronics Electrostatic Fieldmeter - Static Monitor - model 177A - Manual (Page 59)

APNE-0015 58
Typical Web Charging Scenario
If we select values of the above factors and hold them constant while allowing the web and
roller to make multiple identical contacts, the charge that is transferred follows an
exponential charging relationship versus time. The web charge density then gradually
approaches equilibrium at velocity V.
Figure II-2
Typical Roller/Web Charging Scenario
Measure
Web Charge
At time = 0, web is uncharged
At time = t
e
, charge Q is at equilibrium q
e
equilibrium charge density
Time
t
e
q
e
Q
0