multi-conductor measuring device for detecting a faulty, temperature-dependent resistive sensor

摘要

The invention relates to a multi-conductor measuring device (10; 150), the at least two alternately controllable power generation facilities (70, 80; 250, 260), at least two voltmeters (110, 120; 270 – 300) and at least three terminals (1, 2, 3; 151 – 155), preferably three, four or five connecting terminals, on the at least two electrically connected temperature-dependent resistance sensors (50, 60; 210, 220) can be connected. These multi-conductor measuring device has, in addition, an evaluation device (130; 310), which is designed for this purpose, the electrical resistances of the resistance sensors automatically and with the use of each possible combination of a two-, three- and four-wire measurement be determined in order to be able to detect a defective resistance sensor.