Thermocouple Connections
LO
HI
NI 9219
Thermocouple
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.
•
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.
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NI 9219 Getting Started Guide