| 摘要 |
An ionization system includes a power supply and an ionizer. In a first operating state, properties of an output are set to fixed non-zero baseline levels, and in a second operating state, are set to neutralizing levels. The fixed baseline level is different than the neutralizing level for at least one of the properties. A downstream charge sensor measures an object charge. A controller switches the power supply between the first and second states during a sequence of alternating first and second time periods, during the first time period only, senses a current flow to the ionizer, during the second time period only, receives measured charge data from the sensor, during the second time period only, adjusts the neutralizing levels based on the charge data, and during the first or second time period, calculates an upstream object charge based on sensed current flow or determines a relative ionizer condition. |
