To exclude the effect of electric field on the electronic, electronic research only under the action of gravity movement, there must be eE < MEG, E < 10-10V / M can be calculated, which is a little electrostatic field "static vacuum", the only pumping vacuum cavity for electrostatic shielding can be achieved. In fact, electrostatic shielding achieved by a closed conductor cavity is very effective.
. Some electronic devices or measuring equipment in order to avoid interference, should be the implementation of electrostatic shielding, such as indoor high voltage equipment cover ground metal cover or a more dense metal mesh, metal tube shell. And as a full wave rectifier or bridge rectifier power transformer, the primary winding and secondary winding between the metal sheet or wrapped around a layer of enameled wire and grounding, shielding effect. In the high-voltage live operation, the workers put on the metal wire or conductive fibers woven into the pressure, can play a protective role on the human body. In the electrostatic experiment, there is a vertical electric field about 100V / m near the earth
This should only be able to play a small role in the shielding. The shielding of the metal conductor shell of the instrument or working environment is not affected by the external electric field, nor the impact of the external electric field.
