| 摘要 |
Method for automatically connecting or disconnecting a communication resistor of a HART device (1), comprising the following steps: - emitting a test signal on a current loop (3); - reading back a test voltage signal from the current loop (3), which test voltage signal is based on the emitted test signal; - comparing the test voltage signal with a reference signal (11b); connecting the communication resistor (6) into the current loop (3) if the test voltage signal exceeds the reference signal (11b). |
