AUXILIARY ELECTRODE APPARATUS FOR MEASURING DISTRIBUTION OF SPACE ELECTRIC FIELD

摘要

PURPOSE:To enable highly precise measurement in a reduced staining degree at the time of rainwater, by making such a structure that the optical fiber from a measuring part is connected to the optical sensor in a pleated insulator having an insulating cap and the upper and the lower parts of the sensor are connected to an electrode. CONSTITUTION:An optical fiber cable 1 is inserted into a sensor part A in such a state that it is held between the rubber cap 9 provided to the lower side surface of an insulating rod 2 and a rubber protective bush 10 from a photoelectric conversion measuring instrument 11 through a connector 12 and pierced through the central orifice 5c of a disc electrode 5b to be connected to the BSO sensor 4b in a case 14. The sensor A has a cap 15 and is provided with a pleated insulator 30 while the cable 1 is bifurcated through the central orifice 5c to be connected to a BSO sensor 4a by a connector 13 at one end thereof in the case 14 therewithin and the lead wire 4b of said sensor 4a is fixed to an upper disc electrode 5a. Therefore, a staining degree is low even at the time of rainwater and highly precise measurement can be performed.