Air-Vac DRS27, User Manual

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DRS27 User’s Guide Chapter 5: Process Development Guide/Engineering Training
0027.00.902 5-28
5.0.4 Tutor Screen: Thermal Analysis
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This screen can be activated by clicking on the Analysis-toggle button (A) .
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Compare the actual time in the Soak Event to the Target Soak time of 45-75 seconds.
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Compare the actual time in the Reflow 1 and 2 events to the Target Reflow time of 45-75 seconds.
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If the actual Soak and Reflow times fall within the targeted time ranges, you have created a good
thermal profile. Proceed to the Profile Build section.
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If the Soak and/or Reflow stage(s) are less than the minimum target of 45 seconds, the profile is too
“hot” and has run too fast.
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If the Soak and/or Reflow stage(s) are greater than the maximum target of 75 seconds, the profile is
too “cold” and has run too slow.
NOTE: High thermal mass components on high thermal mass assemblies have a 45-75 sec-
ond soak range, however, the reflow stage may be as long as 120 seconds due to the longer
time required to return to minimum liquidus temperature.
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If the first iteration is too hot or too cold, a second iteration is required.
A