UL 507 Figure 8.1 PA160B Impeller Accessibility Test Probe

This UL 507 Figure 8.1 compliant impeller accessibility test probe is engineered for safety verification of portable appliances. According to UL 507:2023 requirements, impeller components presenting injury risks must be guarded such that this probe cannot contact hazardous parts when inserted with 4.45 N (1 pound) of force for a maximum duration of 5 seconds through any guard opening.

Specifications

• Probe Type: UL 507 Figure 8.1 Impeller Accessibility Test Probe (for portable appliance impeller guard compliance verification)
• Probe Material: Stainless steel (thin-gauge, rigid construction, corrosion-resistant; maintains dimensional stability in confined impeller guard apertures)
• Handle Material: Nylon (electrically insulating, heat-resistant to 100°C; ergonomic compact grip optimized for portable appliance testing applications)
• Key Dimensions:
  • Total Length: 88.9 mm (3-1/2 inch)
  • Head Length: 25.4 mm (1 inch)
  • Head Radius: 3.175 mm R (1/8 inch)
  • Former Head Diameter: 12.7 mm (1/2 inch)
  • Tail Diameter: 25.4 mm (1 inch)

Test Procedures

1. Conduct visual inspection of the probe assembly for structural integrity (e.g., tip deformation, handle cracking, material degradation).
2. Energize the portable appliance under test (e.g., compact fan unit) and activate impeller rotation at nominal operating speed.
3. Grasp the insulating handle and align the probe tip with impeller guard apertures (e.g., grille openings, ventilation slots).
4. Apply controlled 4.45N thrust force to the probe—terminate insertion if guard resistance is detected.
5. Verify whether the probe contacts rotating impeller blades or adjacent energized components.
6. Document test results (pass/fail compliance status) and de-energize the appliance.

Applications

1. Safety compliance testing of portable table fans (6–8 inch models) for impeller access prevention per UL 507:2023 Figure 8.1 requirements.
2. Verification of compact air purifiers (impeller-based designs) for North American market regulatory compliance.
3. Manufacturing quality control for desktop USB-powered fans to ensure UL standard conformity.
4. Post-production safety audits of portable evaporative coolers (small impeller configurations) for impeller guard effectiveness validation.

UL 507 Figure 8.1 PA160B Impeller Accessibility Test Probe

Tags: SMT-PA160B, UL 507