UL 507 Figure 8.1 PA160B Impeller Accessibility Test Probe for Portable Appliances

The UL 507 Figure 8.1 PA160B probe is a specialized safety testing instrument designed for evaluating impeller accessibility in portable appliances in accordance with UL 507 standards. This probe verifies that protective guards effectively prevent contact with hazardous rotating impeller components when subjected to a force of 4.45 N (1 pound) applied for a maximum duration of 5 seconds through any guard opening.

Technical Specifications:
Probe Type: UL 507 Figure 8.1 Impeller Accessibility Test Probe
Probe Material: Stainless steel (thin-walled, rigid construction, corrosion-resistant; maintains dimensional stability in confined impeller guard apertures)
Handle Material: Nylon (electrically insulating, heat-resistant to 100°C; ergonomic design optimized for portable appliance testing applications)
Dimensional Parameters:
– Overall Length: 88.9 mm (3-1/2 inch)
– Probe Head Length: 25.4 mm (1 inch)
– Probe Head Radius: 3.175 mm R (1/8 inch)
– Probe Head Diameter: 12.7 mm (1/2 inch)
– Handle Diameter: 25.4 mm (1 inch)

Standardized Test Protocol:
1. Conduct visual inspection of probe for structural integrity (e.g., tip deformation, handle cracks).
2. Energize portable appliance under test and operate impeller at rated speed.
3. Grasp insulating handle and align probe tip with guard openings (e.g., protective grille apertures).
4. Apply controlled 4.45 N force perpendicular to guard surface; discontinue if guard resistance is detected.
5. Verify probe does not contact rotating impeller blades or adjacent energized components.
6. Document test results (pass/fail) against UL 507 safety requirements and de-energize appliance.

Application Scope:
1. Safety compliance testing of portable table fans (6–8 inch models) for impeller accessibility per UL 507:2023 Figure 8.1 requirements.
2. Verification testing of compact air purification devices with impeller-based airflow systems for North American market compliance.
3. Manufacturing quality control of desktop USB-powered ventilation devices to ensure UL standard conformity.
4. Post-production safety audits of portable evaporative cooling units with integrated impeller assemblies.

UL 507 Figure 8.1 PA160B Impeller Accessibility Test Probe for Portable Appliances

Tags：SMT-PA160B , UL 507