![]() ![]() So, since the resistance of the RTD circuit is very important the resistance of the wires used to connect the RTD to the PLC or monitor needs to be accounted for (subtracted) in the conversion of the RTD resistance to temperature. ![]() Wire has resistance, and long wires have more resistance than short wires. So, wires have to be used to connect them to the monitors or PLCs. RTDs are usually remotely located-remote in this sense meaning they are not located directly next to the PLC or monitor they are connected to. An RTD is a very simple device, the resistance of which changes in proportion to the temperature in the area where the RTD is mounted. Having struggled with RTDs many years ago, I can understand how confusing this can seem to be.
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