OK LS-811 Rain Test Chamber

Overview

The OK LS-811 Rain Test Chamber is an engineered environmental test system designed to replicate controlled rainfall conditions for evaluating the ingress protection (IP) performance of enclosures, electronic housings, automotive components, and outdoor equipment. Based on the Couette-type fluid dynamics principle applied to calibrated water delivery, the chamber delivers reproducible rain exposure across standardized test profiles defined in IEC 60529, GB 4208, and ISO 20653. Unlike ambient weather simulation systems, the LS-811 operates as a closed-loop, chamber-based platform integrating oscillating pipe, fixed spray head, and high-pressure jet modules—enabling sequential or independent execution of IPX1 through IPX6 test sequences within a single test cycle. Its thermally stabilized chamber environment (RT+10°C to 55°C) permits combined thermal-rain testing per MIL-STD-810G Method 506, supporting reliability validation under realistic operational stress conditions.

Key Features

• Multi-mode water delivery architecture: independently configurable oscillating pipe (for IPX3/IPX4), fixed multi-orifice spray head (IPX3/IPX4 alternative), and high-flow jet nozzle (IPX5/IPX6 compliant)
• Precisely regulated droplet generation: adjustable nozzle orifice (0.5–4.5 mm diameter) and pressure-controlled flow path ensure repeatable drop size distribution per ISO 20653 Annex B
• Programmable wind simulation: integrated axial fan system delivers laminar airflow from 5 to 18 m/s, enabling dynamic rain-wind angle testing aligned with automotive OEM specifications (e.g., VW TL 81300, Ford ES-XW7T-1A278-AC)
• Stainless steel wetted path: SUS304 interior chamber, filtered water circuit (0.45 µm absolute filtration), and corrosion-resistant pump manifold prevent scaling and particulate clogging
• PLC-driven control logic with audit-trail-capable HMI: 7-inch resistive touchscreen interface supports user-defined test programs, real-time parameter logging, and password-protected configuration access
• Comprehensive safety interlocks: automatic shutdown on door opening, water level depletion, motor overload, and internal leakage detection

Sample Compatibility & Compliance

The LS-811 accommodates samples up to Ø600 mm diameter and 100 kg mass on its variable-speed rotating turntable (1–5 rpm). The chamber’s modular mounting rail system supports fixtures for vertical, angled, or rotating orientation during exposure—critical for validating directional water resistance per IEC 60529 Clause 14.2. All hydraulic subsystems are calibrated against traceable NIST-equivalent reference standards for flow rate (±1.5% FS), pressure (±0.5% FS), and timing accuracy (±0.1 s). The system meets full conformance requirements for third-party certification audits under GLP and ISO/IEC 17025 laboratory accreditation frameworks. Documentation includes factory calibration certificates, test protocol templates aligned with IEC 60529 Annex D, and raw data export capability for FDA 21 CFR Part 11-compliant environments.

Software & Data Management

The embedded control firmware records timestamped values for rainfall intensity, chamber temperature, elapsed test time, rotational speed, and actuator status at 1-second intervals. Data exports in CSV format via USB port or Ethernet (Modbus TCP) for integration into LIMS or MES platforms. Optional OK-TestSuite software provides automated report generation—including pass/fail evaluation against IP rating thresholds, graphical overlay of actual vs. target rainfall profiles, and deviation heatmaps across sample surfaces. Audit trail functionality logs all operator actions, parameter modifications, and system events with user ID and timestamp—fully satisfying traceability requirements under ISO 9001:2015 Clause 8.5.2 and IATF 16949 Section 8.5.1.2.

Applications

The LS-811 serves as a primary verification tool in quality assurance workflows for industries requiring rigorous environmental robustness validation. In automotive electronics, it validates junction box sealing integrity under simulated highway-speed rain impact (ISO 20653 Zone 3–4). For consumer appliances, it verifies gasket durability in washing machines and outdoor-rated HVAC units per IEC/EN 60335-1 Clause 15.2. Telecommunications equipment manufacturers use the chamber to qualify base station cabinets against ETSI EN 300 019-1-4 Class 4.1.1 environmental profiles. Additionally, the system supports R&D-level parametric studies—such as correlating droplet kinetic energy (calculated from velocity and diameter) with seal failure modes—to inform material selection and mechanical design optimization.

FAQ

Does the LS-811 support IPX7 or IPX8 immersion testing?
No—the LS-811 is configured exclusively for rain exposure protocols up to IPX6. Immersion testing requires separate tank-based systems compliant with IEC 60529 Clause 14.2.4.
Can the chamber operate continuously for extended test cycles?
Yes—continuous operation is supported for up to 999 minutes per cycle; however, duty-cycle limitations apply to the high-pressure pump module (max 30 min ON / 15 min OFF for IPX5/IPX6 mode).
Is distilled water required for operation?
Deionized or softened water with conductivity ≤10 µS/cm is mandatory to prevent nozzle fouling and scale formation in the stainless steel water path.
How is calibration maintained between accredited lab audits?
OK supplies annual calibration kits including certified flow meters, pressure transducers, and digital timers; full recalibration services are available through OK’s ISO/IEC 17025-accredited service center in Shenzhen.
What electrical supply is needed for full IPX5/IPX6 operation?
Three-phase 380 V ±10%, 50 Hz, 16 A minimum—single-phase 220 V operation is only permitted for IPX1–IPX4 modes.