Direct answer
Fiber-loss results depend on a valid reference. Re-reference according to the instrument procedure, changes to reference connections, cord condition and project requirements—not a universal interval. An invalid baseline cannot support acceptance under the original conditions.
Definition and applications
A reference establishes the baseline under defined connections; it is not an instrument calibration certificate. Fluke's documented one-jumper workflow warns that disconnecting the output-side reference cords invalidates the reference. Other interfaces and methods require their own approved procedures.
Use this review for batch handover, cord changes and investigations of negative or shifted results. The objective is a traceable reference session, not one arbitrary reset interval for every tester.
Basis：Fluke reference workflow。
Change-control table
| Change or observation | Recommended action | Record |
|---|---|---|
| Output reference connection changed | Re-reference under the procedure | Position changed and new values |
| Cord or adapter replaced | Review method and verify again | Cord identity and configuration |
| Time or environment changed | Follow instrument/project rules | Time and conditions |
| Negative or shifted results | Suspend verdict and investigate | Original values and findings |
| Operator handover | Verify session and unchanged boundary | Operator, reference time and batch |
Auditable reference sessions
Assign a reference session ID and link it to the instrument, wavelength, method, reference-cord IDs, inspection and verification. Associate batch results with that ID so changed cords do not silently inherit an old baseline. Record calibration status separately.
Preserve abnormal readings, inspect the setup, then re-reference and retest under the approved procedure. Keep both sets of results rather than overwriting failures. If reference validity cannot be established, identify the affected batch and required retest instead of automatically passing it or attributing every discrepancy to the product.
Procurement FAQ
- Is referencing calibration? No; keep separate records.
- Is once per day always sufficient? Follow procedure and actual changes.
- Does negative loss imply cable gain? Investigate baseline and conditions.
- Can an old reference survive cord replacement? Re-reference and verify as required.
- How should batches be reviewed? Match each batch to its reference session and changes.
Related guides and products
MPO test reference cords · OLTS vs OTDR acceptance。
Related product configuration · Contact an engineer。The product link supports configuration review, not an unverified performance or availability claim.
Sources and review date
Sources reviewed: 2026-10-07. Checklists and process recommendations are general procurement guidance, not complete standard clauses or verified ARRANEX product claims.
Sources checked: 2026-10-07