Method for automatic switching of a communication resistor of a hart device in or out
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United States of America Patent
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Nov 17, 2020
Grant Date -
May 21, 2020
app pub date -
Jan 24, 2020
filing date -
Apr 17, 2015
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Abstract
Method for automatic switching of a communication resistor of a HART device in or out, wherein the method comprises steps as follows: transmitting a test signal on an electrical current loop; reading from the electrical current loop a test voltage signal, which is based on the transmitted test signal; comparing the test voltage signal with a reference signal; connecting the communication resistor into the electrical current loop when the test voltage signal exceeds the reference signal.
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