![set up a pid controller in labview vi set up a pid controller in labview vi](https://i.ytimg.com/vi/D01_rMY7zVA/maxresdefault.jpg)
If you are using a shielded thermocouple, connect the COM terminal of your device to the shield and the shield to a common-mode voltage reference of the thermocouple.
![set up a pid controller in labview vi set up a pid controller in labview vi](https://file.scirp.org/Html/paperimages/4303_7.jpg)
If you are unsure which of the thermocouple leads is positive and which is negative, check the thermocouple documentation or the thermocouple wire spool. Connect the positive lead of the thermocouple to the TC+ terminal and the negative lead of the thermocouple to the TC– terminal. The connection diagram in Figure 2 indicates which pins on your DAQ device should be wired according to the physical channel you selected. Each thermocouple wire has a positive lead and a negative lead.