OK-HC-900.12 IP6X Dust-Tight Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Model | OK-HC-900.12 |
| Sand Composition | 97–99% SiO₂ (quartz sand) |
| Sand Blasting Concentration | 1.1 g/m³ ±0.25 g/m³ to 2.2 g/m³ ±0.5 g/m³ |
| Sand Blasting Air Velocity | 0–29 m/s |
| Dust Suspension Concentration | 0.1–10.6 g/m³ ±7 g/m³ |
| Dust Suspension Air Velocity | 8.9 m/s ±1.2 m/s |
Overview
The OK-HC-900.12 IP6X Dust-Tight Test Chamber is an engineered environmental test system designed exclusively for compliance verification against the IEC 60529 and GB/T 4208 “IP6X” ingress protection rating—specifically the “dust-tight” requirement. Unlike general-purpose dust exposure chambers, this chamber implements a rigorously defined test methodology based on controlled high-velocity particulate impingement under continuous rotational sample exposure. It operates on the principle of simulating worst-case desert or industrial airborne particulate environments where fine silica-based dust (particle size distribution compliant with ISO 10113 and IEC 60529 Annex B) is delivered at precisely regulated velocity, concentration, and directional uniformity. The chamber integrates a vertical laminar airflow path, a motorized rotating turntable, and a closed-loop dust recirculation system with multi-stage filtration—ensuring reproducible, auditable, and standards-aligned test execution over the full 8-hour duration mandated by IEC 60529.
Key Features
- Structural Integrity & Sealing Architecture: Inner chamber constructed from electropolished 304 stainless steel with full TIG welding and zero internal seams; dual-lip silicone door gasket system rated for <1.0 × 10⁻⁶ m³/h leakage under negative pressure differential—validated per ISO 10648-2 Class 5 containment criteria.
- Programmable Rotating Sample Platform: Precision AC servo-driven turntable with adjustable speed range of 1–5 rpm, constant torque output across full load capacity (up to 50 kg), and real-time angular position feedback for GLP-compliant test documentation.
- High-Velocity Dust Delivery System: Dual-mode air handling: (a) High-speed sand blasting mode (0–29 m/s, vertically downward, ISO 10113-compliant turbulence intensity <15%) and (b) Low-velocity dust suspension mode (8.9 ±1.2 m/s) with independent mass flow control via calibrated venturi meters and PID-regulated centrifugal blowers.
- Closed-Loop Silica Recirculation: Integrated cyclonic pre-separator and HEPA H14 + activated carbon post-filter train ensures >99.995% particulate capture efficiency (EN 1822-1); automatic dust recovery funnel and vibratory re-entrainment mechanism maintain stable concentration profiles throughout extended test cycles.
- Industrial Control & Traceability: PLC-based controller (Siemens S7-1200) with 10.1″ capacitive touchscreen HMI; supports user-defined test profiles, time-stamped event logging (start/stop, mode switch, alarm), and exportable CSV data files compliant with FDA 21 CFR Part 11 audit trail requirements.
Sample Compatibility & Compliance
The OK-HC-900.12 accommodates samples up to 600 mm (W) × 600 mm (D) × 600 mm (H) and 50 kg gross weight. Its design satisfies the mechanical and environmental boundary conditions specified in IEC 60529 Clause 14.2.3 for IP6X testing—including mandatory 8-hour continuous operation, uniform surface exposure via rotation, and post-test visual inspection under 10× magnification per ISO 20623. The chamber is routinely validated using NIST-traceable aerosol photometers (TSI 3330) and gravimetric sampling per ISO 14644-1 Class 5 protocols. It supports parallel execution of IP5X (dust-protected) tests via software-selectable mode switching—eliminating need for secondary equipment in multi-level IP validation workflows.
Software & Data Management
The embedded control firmware provides full test lifecycle management: profile creation (duration, rotation speed, air velocity setpoints, dust injection timing), real-time parameter monitoring (velocity, concentration inferred from pressure differential curves, chamber temperature), and automated pass/fail evaluation based on user-defined acceptance thresholds. All operational data—including system alarms, sensor drift compensation logs, and calibration history—are stored internally with SHA-256 hashing for integrity verification. Optional Ethernet/IP and Modbus TCP interfaces enable integration into centralized laboratory information management systems (LIMS) and support automated report generation in PDF/A-1b format aligned with ISO/IEC 17025 documentation requirements.
Applications
- Validation of electronic enclosures (e.g., automotive ECUs, outdoor telecom cabinets, military handheld radios) for dust-tight sealing integrity prior to field deployment.
- Qualification of medical device housings (infusion pumps, portable diagnostics) under ISO 13485 and IEC 60601-1 environmental clauses.
- Material science research on gasket compression set, sealant adhesion degradation, and filter media clogging kinetics under accelerated dust exposure.
- Pre-certification testing for UL 50E, EN 60529, and MIL-STD-810H Method 510.7 (Sand and Dust).
- Production line final QA for consumer electronics (smartphones, wearables) targeting IP68-rated ingress protection claims.
FAQ
Does the OK-HC-900.12 meet the exact air velocity and particle composition requirements of IEC 60529 for IP6X?
Yes. It delivers vertical airflow at ≥2 m/s (adjustable up to 29 m/s) using quartz sand (97–99% SiO₂) with particle size distribution verified per IEC 60529 Annex B.
Can the chamber perform both IP5X and IP6X tests without hardware modification?
Yes. Software-selectable modes allow seamless transition between low-velocity dust suspension (IP5X) and high-velocity sand blasting (IP6X), including automatic activation/deactivation of the rotating turntable.
How is dust leakage prevented during chamber opening after test completion?
The integrated HEPA H14 + carbon filtration system reduces airborne particulate concentration to <0.01 mg/m³ before door interlock release, verified by real-time laser particle counter feedback.
Is third-party certification available for this model?
Each unit ships with a factory calibration certificate traceable to CNAS-accredited metrology labs; optional UKAS-accredited test reports are available upon request.
What maintenance intervals are recommended for long-term repeatability?
Biannual verification of blower performance, annual replacement of HEPA filters and silicone gaskets, and quarterly gravimetric validation of dust concentration accuracy per ISO 14644-3 Annex C.
