| 摘要 |
An apparatus for measuring an electrostatic charge includes a conductive plate a voltage source a first switch for connecting the conductive plate to the voltage source or to the ground potential and an insulator membrane arranged on the conductive plate upon a sample element is to be placed. A conductive grounded plate is arranged parallel to the conductive plate, and a conductive probe is secured to the grounded plate through an insulator material for picking up the electrostatic charge induced in the sample element from the surface of the sample element. A coulomb meter with a first electrode is connected to the grounded plate for indicating the quantity of the electrostatic charge. Completing the apparatus is a second switch for connecting the probe to the second electrode of the coulomb meter or the grounded plate.
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