Additel 221A Multifunction Temperature Calibrator User Manual - Manual (Page 75)

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11.2 Connect to a HART Device
To start communication with a HART device, you can press HART then the calibrator will prompt you to select the HART
resistor. Figure 11.1 shows the connection with internal built‐in HART resistor. Figure 11.2 shows the connections with
an external HART resistor.
To insure the connection is correct refer to Figure 11.1 or 11.2. To start polling and communicating with a HART
device, proceed as follows:
Figure 11.1 the connection with internal built‐in resistorFigure 11.2the connection with external resistor