Intel E6420 Design Guidelines - Page 99
Measuring Resistance Between Thermocouple and IHS
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Case Temperature Reference Metrology 18. Place a 3rd piece of tape at the end of the step in the groove as shown in Figure 7-22. This tape will create a solder dam to prevent solder from flowing into the larger IHS groove section during the melting process. 19. Measure resistance from thermocouple end wires (hold both wires to a DMM probe) to the IHS surface. This should be the same value as measured during the thermocouple conditioning Section D.5.1.step 3 (Figure 7-23). Figure 7-23. Measuring Resistance Between Thermocouple and IHS 20. Using a fine point device, place a small amount of flux on the thermocouple bead. Be careful not to move the thermocouple bead during this step (Figure 7-24). Ensure the flux remains in the bead area only. Thermal and Mechanical Design Guidelines 99