To crimp the double sided splice terminal, we need to pay attention to the quality. In IPC-A-620, there is chapter to define the spec.
Target - Class 1,2,3
• Correct color-coded heat shrinkable sleeve used (A).
• Heat shrinkable sleeve is centered on the ferrule.
• Meltable sealing rings have flowed.
Acceptable - Class 1,2,3
• Ends of wires do not butt against wire stop. Wires are visible
through inspection windows (arrows).
• Wire insulation gap is less than two wire diameters including
insulation.
• Bellmouth is evident.
Acceptable - Class 1,2,3
• Wire insulation gap is within two wire diameters including
insulation on both ends (not shown).
• Heat shrinkable sleeve ends are sealed to the wire insulation
(no wire strands are exposed).
Acceptable - Class 1,2,3
• Crimp indents are rotated (seamless splices only).
Acceptable - Class 1
Process indicator - Class 2,3
• Heat shrinkable sleeve is not centered yet sleeve ends are
sealed to the wire insulation.
Defect - Class 1,2,3
• Wire insulation extends into the wire crimp barrel (A).
• Crimp indent is off the end of the splice (B).
• Wire end(s) are not visible through the inspection window(s)
(C).
• Wire insulation gap is greater than two wire diameters
including insulation (D).
• Heat shrinkable sleeve does not overlap both insulation
gaps (not shown).
Defect - Class 1,2,3
• Wire strands extend out of inspection window.
Defect - Class 1,2,3
• Wire strands have pierced the heat shrinkable sleeve.
