DIRECT ANSWER / 01
Cleaning is not acceptance: inspect, clean when needed, inspect again
For MPO end-face work, first confirm a safe link state and probe compatibility, then inspect. If contaminated, clean under the tool instructions and reinspect. A cleaning action or dust cap does not prove an acceptable face; inspection does not replace lane and optical tests.
Use this for installation, remating, troubleshooting and reference-cord maintenance. IEC 61300-3-35:2022 covers observation and classification of end-face contamination, scratches and defects; Fluke’s MPO guidance addresses inspection and cleaning. This checklist does not prescribe unverified defect thresholds or a universal consumable life.
SELECTION MATRIX / 02
Purchasing decision matrix
| Item | Identify | Correct action | Avoid |
|---|---|---|---|
| Safety and identification | Link state, port, pins, end face and fibre rows | Follow equipment safety procedures; do not look into fibre | Working with an unknown optical state |
| Tool matching | Probe, adapter, end face and viewing coverage | Verify coverage of the configuration and required positions | Assuming one image covers uninspected rows |
| Cleaning and reinspection | Contamination, tool instructions and post-clean images | Reinspect both mating sides after instructed cleaning | Mating immediately without reinspection |
| Persistent defects | Contamination or damage remaining after cleaning | Isolate, record and escalate under the project procedure | Repeatedly mating in hope of recovery |
| Records | Port, revision, images, criteria and reinspection result | Keep IDs that match the test report | Saving a pass image without its location |
RFQ INPUTS / 03
Minimum inputs a supplier can verify
| Category | Required input or confirmation |
|---|---|
| Work information | Equipment/port, assembly ID, face, positions and safety confirmation |
| Tools and criteria | Probe/cleaner references, configurations, criteria and version |
| Closed-loop record | Initial inspection, cleaning, reinspection, escalation and subsequent link tests |
BUYER FAQ / 04
Purchasing FAQ
Can new cables skip inspection?
Do not infer acceptance from new packaging. Confirm the end face before mating under the project procedure.
Does a dust cap guarantee cleanliness?
It is not inspection evidence. Inspect after removing protection under the procedure.
Why reinspect after cleaning?
To determine whether contamination was removed and identify remaining defects; the action alone is not a verdict.
Does a passing face guarantee passing loss?
No. The complete link still needs the agreed mapping and optical measurements.
Can a generic probe inspect every MPO?
Do not assume so. Check pins, end face, rows, adapter access and probe instructions.
SOURCES / 05
Sources and applicability
Sources checked: 2026-10-01. This guide clarifies purchasing fields; it does not replace current equipment data sheets, full standards or the approved project drawing.