Case Temperature Reference Metrology
R
80 Thermal/Mechanical Design Guide
D.6 Thermocouple Attach Procedure
D.6.1 Thermocouple Conditioning and Preparation
1. Use a calibrated thermocouple as specified in Sections D.3 and D.4.
2. Measure the thermocouple resistance by holding both wires on one probe and the tip of
thermocouple to the other probe of the DMM (measurement should be about~75 ohms for
40-gauge type T thermocouple).
3. Straighten the wire for about 38 mm [1 ½ inch] from the bead to place it inside the channel.
4. Bend the tip of the thermocouple at approximately 45 degree angle by about 0.8 mm
[0.030 inch] from the tip (
Figure 30).
Figure 30. Bending the Tip of the Thermocouple
D.6.2 Thermocouple Attachment to the IHS
5. Clean groove with IPA and a lint free cloth removing all residues prior to thermocouple
attachment.
6. Place the thermocouple wire inside the groove; letting the exposed wire and bead extend
about 3.2 mm [0.125 inch] past the end of groove. Secure it with Kapton tape (
Figure 31).
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