How to trouble shooting the communication bwteen the x80 HART module and HART devices

X80 HART (BMEAHI/AHO) can connect with HART instruments, one channel for one device. If we found the communication can't be established, how to diagnostic it?
The HART signal is the FSK on the 4~20mA analog signal, so we need a special tool as the attachment picture. After we put it on the signal, and connect it to the PC, we can get the data of HART in PC's common tool for serial link.

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