史诗级难题求大神解答谈论

Install optional process temperature input (Pt 100 RTD sensor)
Note:
To meet ATEX/IECEx Flameproof certification, only ATEX/IECEx Flameproof Cables (Temperature Input Code C30, C32, C33, C34 or customer supplied equivalent) may be used.
1. Mount the Pt 100 RTD Sensor in the appropriate location. Note:Use shielded four-wire cable for the process temperature connection.
2. Connect the RTD cable to the 3051S MultiVariable transmitter by inserting the cable wires through the unused housing conduit connection and connect to the four screws on the transmitter terminal block. An appropriate cable gland should be used to seal the conduit opening around the cable.
3. Connect the RTD cable shield wire to the ground lug in the housing.

用3051的钱可以买几个一体化温度变送器了吧，搞这么复杂又费钱目的是什么

建议查一下套管和线路上有没有破损的地方，我感觉是线路接地了，导致无信号。