Seven-stage visual fault locator sample acceptance checklist
- Lock the exact sample identity. Record brand, full model, output option, serial number, revision, battery type, charger or replaceable cells, supplied adapters, labels, manual revision, quotation and country-specific warranty route. Do not accept a family name in place of the delivered configuration.
- Verify safety evidence before power-up. Match the laser classification, nominal output, output tolerance, wavelength, label, manual and market documents to the exact unit. Approve a trained-user method that prohibits direct viewing of the output or any connected fiber and addresses active-service checks.
- Inspect the delivered connector system. Check the port, protective cap, 2.5 mm access for FC, SC and ST, 1.25 mm access for LC or MU where required, supplied adapters, retention, cleanliness, wear parts and replacement route. Never force a mismatched ferrule.
- Check controls and operating modes. Record power-up, continuous and pulse modes, indicators, automatic shutoff, unintended activation protection and repeatable control behavior. Observe the defined fiber path, not the emitter.
- Run the buyer's defined fiber path. Use a controlled test fiber and the connector, distance, bend, break, splice, jacket and ambient-light conditions that represent the real job. Record every path, condition, observation, missed fault and limitation; do not convert this into a universal distance rating.
- Check runtime, heat and field handling. Run the buyer-defined duty cycle and record battery or charging behavior, remaining-time indication, heat, cap and port wear, control reliability, the approved drop or vibration procedure, and recovery after interruption.
- Close service and commercial evidence. Confirm the exact delivered kit, permitted substitutions, spare sleeves and adapters, warranty exclusions, repair destination, response terms, freight, duties, sample credit and dated total cost before release.
Acceptance record: define the pass rule first
Swipe horizontally to compare all columns.
| Check | What to record | Buyer-defined pass rule |
|---|---|---|
| Identity and safety | Brand, model, output option, serial, laser class, label, manual, wavelength and market documents. | Exact written configuration and approved trained-user procedure. |
| Connector access | Port size, supplied adapters, fit, retention, cap, cleanliness, wear and replacement parts. | Every required connector is accessible with the delivered kit. |
| Modes and controls | Continuous and pulse behavior, indicators, shutoff, activation protection and repeated control cycles. | Required modes work consistently under the approved safety method. |
| Defined fiber path | Fiber, length, connectors, bend, break, splice, jacket, ambient light and every observation. | Buyer-selected faults are visible under named job conditions. |
| Runtime and handling | Duty cycle, battery, charging, heat, port and cap wear, controls, interruption and recovery. | Completed workload and handling limits agreed before testing. |
| Service and total cost | Spares, warranty, exclusions, repair route, response terms, delivered kit, freight, duties and dated price. | Written support and total-cost limits required before release. |
Applying the checklist to a GUANGYAN B3A-30 sample
GUANGYAN public material identifies B3A-30 as a 650 nm visual fault locator in a family with 5, 15, 20 and 30 mW options. The same material describes continuous and pulse modes, 2.5 mm access, lithium or two-AAA power choices, Type-C external power, remaining-time display, a replaceable ceramic sleeve, IP54 protection, a published operating range of -20°C to +60°C, a 12-month warranty and lifetime cost-price repair.
The main issue before purchase is the unresolved distance and safety evidence. The English listing title states 30 km while the Chinese product article states daylight detection above 1.5 km, and the reviewed pages do not publish the exact laser class or output tolerance. A buyer should require those items, the exact battery build, 1.25 mm adapter access, delivered labels, manual and test conditions in writing before sample use.
Request a B3A-30 sample acceptance plan Compare B3A-30 with established VFLs
Check the supplier evidence before requesting a sample
Frequently asked questions
How much output power does a visual fault locator need?
There is no universal best output. Choose for the actual fiber type, distance, ambient light, jacket, connector access and safety procedure. Higher output does not remove the need for documented laser classification and trained use.
Can published VFL distance figures be compared directly?
Not unless the fiber, connectors, fault, jacket, ambient light, output definition and observation method are matched. Treat each distance as a manufacturer statement under its own conditions.
Is a 30 mW VFL automatically better than a lower-power model?
No. The required distance, visibility, controls, laser classification, local procedure and technician training matter more than the largest output number.
Which connectors should be checked on a VFL sample?
Check every ferrule size and adapter needed by the real job, including whether 2.5 mm and 1.25 mm access is built in, supplied, optional or unavailable. Record fit, retention, cap protection and replacement parts.
Has Fiber Tool Lab independently tested the GUANGYAN B3A-30?
No. B3A-30 is used as a sample-qualification example because public manufacturer pages describe its configuration and direct supplier communication may become possible. No output, reach, runtime, safety or durability result is presented.
Official sources behind the acceptance actions
- Kaiteng Communications GUANGYAN B3A official product article, source for the published wavelength, output family, modes, power options, connector, serviceability, protection, temperature and warranty statements.
- GUANGYAN B3A-30 official English listing, source for the exact B3A-30 model identity and the 30 km listing title that still requires conditions and reconciliation.
- Fluke Networks VisiFault official page, a documented reference for laser class, output, modes, connector access, range, runtime and handling.
- Jonard Tools VFL-150 official page, a documented pen-style kit reference for modes, adapters, range and battery workflow.
- AFL VFI4 official page, a documented reference for output options, laser class, adapters, range, battery and compliance information.
Sources reviewed July 22, 2026 (Beijing time). Product labels, orderable configurations, manuals, warranty and service routes can change. Confirm current written evidence before purchase or sample use.