OK-HC-800 Box-Type Sand and Dust Test Chamber

Overview

The OK-HC-800 Box-Type Sand and Dust Test Chamber is a compact, self-contained environmental test system engineered for standardized evaluation of ingress protection (IP) ratings—specifically IP5X (dust protected) and IP6X (dust tight)—in accordance with GB/T 4208 and IEC 60529. Unlike walk-in sand dust laboratories, this chamber employs a closed-loop vertical airflow architecture to generate controlled, repeatable particulate environments. Its core principle relies on regulated turbulent suspension and directional particle impingement: dust particles are lifted by a high-efficiency centrifugal blower, accelerated through calibrated ductwork, and directed toward test specimens under programmable velocity and concentration profiles. The chamber’s sealed stainless steel construction, precision-engineered air distribution, and gravity-assisted sediment recovery system ensure stable operational repeatability across extended test cycles—critical for compliance-driven quality assurance in regulated industries.

Key Features

• Robust dual-material construction: 304 stainless steel inner chamber (electropolished finish) for corrosion resistance and particle adhesion minimization; powder-coated carbon steel outer enclosure.
• Optically clear, abrasion-resistant observation window with double-lip silicone sealing gasket to maintain integrity during dynamic pressure differentials.
• Motorized rotating sample turntable (0–10 rpm, adjustable), compliant with IP6X rotational requirements, supporting load capacity up to 25 kg.
• Modular particulate delivery system: vibration-fed quartz silica (SiO₂ ≥97%) dosing mechanism ensures uniform dispersion; integrated conical sediment collector enables >95% dust recovery and recirculation.
• Independent control of dust and sand modes via PLC-based touchscreen interface (7″ color HMI) with real-time parameter logging (time, velocity, concentration, cycle count).
• Integrated vacuum port (–100 kPa max) compatible with combined IPX5/IPX6 water ingress testing per IEC 60529, enabling multi-stress validation protocols.
• Safety interlocks: overtemperature cutoff, blower overload protection, door-open airflow shutdown, and HEPA-filtered exhaust filtration (optional) to mitigate operator exposure during chamber access.

Sample Compatibility & Compliance

The OK-HC-800 accommodates specimens up to 600 × 600 × 600 mm (W×D×H) within its 0.8 m³ effective test volume—optimized to maintain ≥70% volumetric airflow uniformity per ISO 16750-3 Annex B guidance. It supports full-cycle testing of electronic enclosures, automotive lighting assemblies, outdoor LED fixtures, industrial connectors, and handheld consumer devices. All operational parameters—including dust concentration (0.1–10.6 ±7 g/m³), dust velocity (8.9 ±1.2 m/s), sand velocity (0–29 m/s), and sand concentration (1.1–2.2 ±0.5 g/m³)—are traceable to NIST-traceable flow meters and calibrated anemometers. The system is validated for conformity with IEC 60529 (IP5X/IP6X), GB/T 4208, MIL-STD-810H Method 510.7 (Sand and Dust), and ISO 20653:2013 (Road vehicles — Degrees of protection against dust, water and mechanical impacts).

Software & Data Management

The embedded controller records timestamped operational data at 1-second intervals, including blower RPM, measured wind speed (hot-wire anemometer), chamber temperature (PT100 sensor), and elapsed test duration. Exportable CSV files support post-test analysis in MATLAB, Python, or LIMS platforms. Optional Ethernet/Wi-Fi connectivity enables remote monitoring and integration into centralized laboratory management systems. Audit trails comply with GLP/GMP documentation requirements: all parameter changes, user logins, and alarm events are time-stamped and non-erasable. Firmware adheres to IEC 62443-3-3 cybersecurity principles for industrial control systems.

Applications

• Automotive: Validation of headlamp housings, radar sensors, battery management systems, and EV charging interfaces under desert-simulated particulate stress.
• Consumer Electronics: IP rating certification for rugged smartphones, action cameras, smartwatches, and wireless earbuds per IEC 60529 and UL 1577.
• Industrial Automation: Sealing verification of junction boxes, motor drives, and HMI panels deployed in mining, agricultural, and offshore environments.
• LED & Outdoor Lighting: Correlation of dust accumulation with thermal derating and optical output degradation in streetlights and stadium fixtures.
• Defense & Aerospace: Pre-qualification of avionics housings and UAV components per MIL-STD-810H sand/dust test procedures.

FAQ

Does the OK-HC-800 meet IEC 60529 IP6X requirements for rotational testing?
Yes—the integrated turntable rotates continuously at 1–10 rpm (user-selectable) with ±0.5 rpm stability, satisfying the mandatory 1-rpm minimum rotation rate specified in Clause 14.2.5 of IEC 60529 for IP6X validation.
Can the chamber operate with alternative test dusts such as Arizona Road Dust (ARD) or A2 Fine Test Dust?
Yes—while pre-configured for quartz silica (SiO₂), the feed system accepts ASTM D5755-certified test dusts when used with optional calibration kits and mass-flow compensation algorithms.
Is temperature conditioning available as an integrated option?
Standard configuration operates at ambient temperature (15–35°C); optional air-cooled or Peltier-based temperature control modules extend range to –10°C to +70°C (±1.5°C accuracy) with humidity monitoring.
What maintenance intervals are recommended for long-term reliability?
Blower belt inspection every 500 operating hours; HEPA filter replacement every 1,000 hours; quarterly calibration of anemometer and concentration sensors using certified reference standards.
How is dust containment verified during door opening after test completion?
A timed purge cycle (30–60 s) activates automatically upon door unlock command, reducing internal pressure differential and drawing residual particulates through the integrated exhaust filter before physical access.