Minimizing Thermal Gradients
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 near the thermocouple
connector 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 NI 9210 terminals are facing forward or
upward.
•
Keep the NI 9210 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
NI 9210 Getting Started Guide
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© National Instruments
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