In fact, waterproof testing in rain test chambers is divided into nine distinct levels. Below are the specifics of these nine levels:

Vertical Drip Test:

The sample is placed normally on a rotating platform (1 rpm).
The distance between the sample’s top and the drip nozzle is less than 200 mm.
Water drip rate: 1.0 ± 0.5 mm/min for 10 minutes.

Tilted Drip Test (15° Angle):

The sample is tilted at 15° from vertical.
Distance from the drip nozzle: <200 mm. Drip rate: 3.0 ± 0.5 mm/min. Each of the four sides is tested for 2.5 minutes (total 10 minutes). Water Spray Test (60° Vertical Range): Two methods: Oscillating Tube Spray Test and Nozzle Spray Test. Splash Water Test (Omnidirectional): Similar to Level 3, using either oscillating tube or nozzle spray. Low-Pressure Water Jet Test (Omnidirectional): Distance from nozzle: 2.5–3 m. Water flow rate: 750 L/h. Test duration: 1 min per m2 of surface area (minimum 3 min). High-Pressure Water Jet Test (Omnidirectional): Distance from nozzle: 2.5–3 m. Water flow rate: 6000 L/h. Test duration: 1 min per m2 of surface area. Short-Term Immersion Test: The sample is submerged at a specified water pressure. Bottom-to-water surface distance: >1 m.
Top-to-water surface distance: >0.15 m.
Test duration: 30 minutes.
Long-Term Submersion Test:

Conditions are agreed upon between the manufacturer and the customer.
High-Pressure Spray Test:

Four spray angles (0°, 30°, 60°, 90°) with four nozzles.
Sample rotation speed: 5 ± 1 rpm.
Nozzle-to-sample distance: 100–150 mm.
30 seconds per angle (total 120 seconds).
Water flow rate: 14–16 L/min.
Water temperature: 80 ± 5°C.
Spray pressure: 8000–10000 kPa.
The above details outline the nine waterproof test levels for rain test chambers. For more information, stay tuned to our website for updates!