Thermocouple and RTD simulator boards for accurate temps

United Electronic Industries (UEI) engineers developed the DNx-TC-378 8-channel thermocouple simulator board and the DNx-RTD-388 8-channel resistance temperature detector (RTD) simulator board for high-reliability measurement environments. The DNx-TC-378 high-precision thermocouple (TC) simulator has 16-bit resolution and offers more than 0.6 °C accuracy with most thermocouple types. Each channel is fully isolated from all others and is capable of simulating the full TC range. Built-in support for J, K, T, E, N, R, and S type TC is included. The board provides cold-junction compensation, so field connections can be made wherever required. The board will simulate an open TC and includes voltage and current diagnostic readback on each channel.

The DNx-RTD-388 simulates 1000Ω RTDs and is based on actual switched resistors, precisely duplicating the behavior of actual RTDs. The board supports 2, 3, and 4-wire configurations with accuracy of 0.26 °C (1Ω). The board is aimed at simulator/software-in-the-loop applications where an on-board device expects an RTD as an input. The board also has built-in diagnostic current monitoring capability. The RTD-388 series simulates 1000Ω RTDs, while the standard DNx-RTD-388-100 simulates 100Ω RTDs.

United Electronic Industries