Changes in the ambient air temperature near the front connector or a thermocouple wire conducting heat directly to terminal
junctions can cause thermal gradients. Observe the following guidelines to minimize thermal gradients and improve the system
accuracy.
-
Use small-gauge thermocouple wire. Smaller wire transfers less heat to or from the terminal junction.
-
Run thermocouple wiring together to keep the wires at the same temperature.
-
Avoid running thermocouple wires near hot or cold objects.
-
Minimize adjacent heat sources and air flow across the terminals.
-
Keep the ambient temperature as stable as possible.
-
Make sure the FieldDAQ device terminals are facing forward or upward.
-
Keep the FieldDAQ device in a stable and consistent orientation.
-
Allow the thermal gradients to settle after a change in system power or in ambient temperature. A change in system power can
happen when the system powers on, or you add or remove devices from a network topology.
-
Allow the thermal gradients to settle after plugging or unplugging the mini-TC plugs.