The rain test chamber is designed for evaluating the protection level of external lighting and signaling devices, as well as car lamp housings. Depending on the specific testing requirements, it is categorized into 8 different levels. Today, engineers from Beijing Yashilin will provide a detailed breakdown of the equipment and its technical specifications.
IPX1 and IPX2 are drip test configurations that follow the technical standards outlined in GB4208-2007, corresponding to GB/T4942.1-2006 and GB10485-2007 for automotive lamp housing protection. The main technical parameters include:
- Water spray aperture: 0.4mm
- Drip tank height adjustable range: 200–2000mm
- Rainfall rate: 3–5mm/min
- Drip area: 800mm × 1000mm
- Drip tank height: 300mm
- Sample stage size: 500×400mm with T-shaped fixing groove
- Sample stage angle: Adjustable from 15° to 45° (relative to vertical) for IPX2 testing
- Sample stage speed: 1r/min for IPX1 testing
For IPX3 and IPX4 tests, two methods are available: the swing tube method and the handheld sprinkler method. The sample is mounted on an appropriate fixture to simulate water exposure from a semi-circular elbow. If the sample is too large for the swing tube method, the handheld sprinkler approach is used instead. When using the swing tube method, the following conditions must be met:
1. The elbow radius should be either 1000mm or 1600mm. The pipe must be equipped with nozzles spaced 50mm apart within the specified angle range, and the pipe should swing 180° as much as possible.
2. The test water should be purified or distilled water that meets the required standards.
3. The sample support table should be open and capable of rotating, simulating the function of a water retention plate.
The following table outlines the test conditions for the swing tube method:
| Nozzle Angle | Pipe Swing Angle | Duration | Nozzle Diameter (mm) | Water Flow Rate (L/min) | Approximate Water Pressure (kPa) |
|--------------|------------------|----------|-----------------------|--------------------------|----------------------------------|
| 0° | ±60° | 10 min | 0.4 | 0.1±0.005 | 80 |
| 30° | ±90° | 60 min | 0.8 | 0.60±0.03 | 40 |
This covers the key details of IPX1, IPX2, IPX3, and IPX4 testing. In the next part, we’ll go over the remaining features and applications of the rain test chamber. Stay tuned for more insights!
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