Previously in this blog series,we discussed some of the best practices for attaching thermocouples to a printed circuit board (PCB) for reflow profiling. Today, I will end this series with a few more tips.
Tip #1: Recommended thermocouple attachment method:
- 首选的连接方法是用高熔点焊料将热电偶焊接到焊点上。
- If the thermocouples cannot be soldered, the next best method for attachment is to use thermally conductive epoxy or aluminum tape. However, be careful not to poke holes in the tape. Formultiple reflow cycles, the tape and/or epoxy may need to be reapplied over time.
- Kapton tape is not recommended for attaching thermocouples because it is an insulator and generally does not produce accurate temperature readings. However, Kapton tape can be used to window pane around aluminum tape for extra security. Make sure the Kapton tape does not cover the tip of the thermocouple where the temperature reading occurs.
Tip #2:It is best that the thermocouple wires are similar in length so they do not get tangled when going into the reflow oven. Thermocouple wires can be fed through a sleeve to ensure they do not become entangled.
提示 3：确保剖析器距离电路板至少有整块电路板的长度，这样剖析器的热质量就不会影响温度结果。
剖析愉快！
