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2.Set the HART® Resistor. Turn on the internal HART® resistor. This can be selected by pressing icon. 3. Complete the electrical connections and continue with the HART® menu operation. 14.3 Communicator attached to a network In this example, the calibrator connects directly to a network. There must be a 250Ω resistor in series with the loop power supply and the HART® device. No functions on channel 2 (CH2) HART® Function is set 250Ω resistor is set to Off 1. Set the function for HART®: 1 d b Home display ® Set HART User Manual Section 2.10.4 c a TAP [EN] English - Communications Supplement K0446 HART® Connections 18