Fiber end-face inspection with inspection scopes
More than half of all optical link faults come from contaminated end faces, not from bad splices. This lesson teaches the inspect-and-clean workflow that professional installers run before every connection.
- 1
Inspect first, clean second, inspect again
The IEC 61300-3-35 cycle: scope the ferrule, clean if any defect exceeds the grade limit, re-inspect to confirm. Cleaning without re-inspection is not a completed step.
- 2
Focus and center the ferrule
With P-200/P-2580, center the ferrule, focus the fiber core region, then judge four zones: core, cladding, coating adhesive zone and ferrule contact zone.
- 3
Judge defects by zone
Scratches are acceptable in the cladding zone but not across the core. Dirt, oil and debris are never acceptable anywhere on the contact zone.
- 4
Clean correctly
One-click cleaner pen pressed once per ferrule, or lint-free wipe folded into quarters — one wipe segment per pass, never wiping in circles back over the ferrule.
- 5
Document the result
Save scope photos for acceptance reports. P-2500 integrates camera and display for jobs that require photo evidence per port.
Field tips from TEKCN engineers
- Inspect the port on the equipment side too — a dirty bulkhead connector re-contaminates your freshly cleaned patch cord instantly.
- Never touch a ferrule with a bare fingertip; skin oil is the hardest contaminant to remove.