Voltage tester for graduated optical display of a voltage and method for its manufacture

摘要

A voltage tester for the graduated display of a voltage applied to two test tips includes a circuit arrangement composed of a parallel connection of three series circuits whereby a PTC-resistor, an antiparallel connection of two light-emitting diodes, and voltage drop resistors are contained in two of the series circuits. Two Zener diodes connected oppositely to one are also contained in the second series circuit, and the third series circuit is composed a glow lamp and voltage drop resistors. The components of the voltage tester are accommodated in a handle connected by a cable to a second handle which a current limiting resistor. Preferred embodiments of the voltage tester and a preferred embodiment of the manufacturing method therefore are proposed.