PCB Assembly Testing Guidelines

When testing a PCB assembly, it is crucial to follow specific guidelines to ensure accurate results and product quality.

Test Sample Usage

• Test samples should be actual soldered products to secure the thermocouple test end.
• Each test sample should be used a maximum of two times to maintain accuracy.
• Avoid prolonged usage of the same test sample for extended testing.

Color Changes in PCB

Due to high-temperature soldering, the PCB’s color may darken, affecting temperature measurement accuracy.

Selecting Test Points

Choose representative test points based on PCB complexity and collector channels.

• Identify hot spots in the center and cold spots around large components.

Attaching Thermocouples

Securely attach thermocouples using high-temperature solder or tape for accurate readings.

Testing Process

1. Place the PCB assembly in the reflow oven and initiate the temperature curve test program.
2. Monitor the real-time temperature curve as the PCB progresses through the oven.
3. Review the temperature curve and peak temperature schedule post-testing.

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