| Incoming material inspection | Chime tubes, hanging parts, and decorative components | Visual check; sample measurement with calipers; compare against approved drawings | No cracks, sharp burrs, or visible corrosion; key dimensions within the drawing tolerance, such as ±1 mm where specified | Prevents fit, finish, and safety defects from entering assembly |
| Surface finishing | Coating coverage and appearance | Visual inspection under consistent lighting; coating-thickness gauge when a thickness requirement is specified | Even finish with no peeling, blistering, or exposed substrate; coating thickness meets the approved specification | Supports appearance consistency and resistance to environmental exposure |
| Solar panel inspection | Panel output and physical condition | Visual inspection; electrical measurement using a solar simulator or controlled light source | No cracked cells or damaged leads; measured output meets the panel’s rated tolerance under the specified test conditions | Checks that the panel can provide the intended charging input |
| Battery and charging assembly | Battery condition, polarity, and charge operation | Verify battery type and polarity; measure charge current and battery voltage with suitable instruments | Correct battery installed; no reversed connections, leakage, or abnormal heating; charging behavior falls within the design specification | Reduces charging faults and battery-related failures |
| Electrical assembly | Solder joints, wiring, and polarity | Visual inspection and functional continuity check | No loose wires, solder bridges, or exposed conductors; connections match the approved circuit diagram | Helps prevent intermittent operation and short circuits |
| LED and light-control test | Illumination, color, and dusk-to-dawn switching | Operate in a dark test area; check LED function and automatic light sensor response | All LEDs illuminate; automatic control switches on in darkness and off under the specified bright-light condition | Confirms basic lighting and sensor functionality |
| Runtime verification | Lighting duration after charging | Charge under defined conditions, then record operating time until the product reaches its specified end point | Meets the product’s declared runtime target; test conditions and battery state are recorded for repeatability | Evaluates combined panel, battery, controller, and LED performance |
| Weather-resistance check | Enclosure and cable-entry protection | Test to the product’s declared ingress-protection level; for example, an IPX4 test evaluates protection against water splashing from any direction under the specified test method | No water ingress that impairs safe operation or function after the applicable test; the rating is claimed only when verified | Checks suitability for the intended outdoor exposure |
| Mechanical and sound check | Hanging strength and chime movement | Inspect cords and attachment points; apply the specified proof load; verify tubes move freely and produce sound when gently moved | No detachment, fraying, or deformation at the design proof load; no obstructed moving parts | Reduces risk of parts falling and confirms normal chime operation |
| Final inspection and packing | Appearance, completeness, and packaging | Final visual and function check; verify accessories, instructions, and packaging against the packing list | Correct components included; product is clean and undamaged; packaging protects the item during normal handling and transport | Ensures each finished unit is complete and ready for shipment |