OK-HH-408 High-Low Temperature Environmental Test Chamber

Overview

The OK-HH-408 is a precision-engineered high-low temperature environmental test chamber designed for rigorous thermal stress evaluation of electronic components, automotive parts, aerospace materials, and industrial assemblies under controlled climatic conditions. It operates on the principle of forced-air convection with dual-stage refrigeration and PID-controlled electric heating, enabling stable and repeatable temperature profiles across its full operating range. The chamber complies with fundamental thermal test standards including IEC 60068-2-1 (Cold), IEC 60068-2-2 (Dry Heat), MIL-STD-810G Method 502.6 (Low Temperature) and Method 501.6 (High Temperature), as well as GB/T 5170.2–2017 and GB/T 10592–2021 for temperature chamber performance verification. Its robust architecture supports both static and powered-in testing configurations—critical for validating real-world operational reliability of active devices during thermal cycling.

Key Features

• Seamless arc-shaped stainless steel interior with matte-finish exterior panels and ergonomic flat-profile handles for enhanced usability and long-term corrosion resistance
• Hermetically sealed chamber structure with high-efficiency centrifugal circulation fan and low-noise scroll-type compressor system for uniform airflow and acoustic performance ≤62 dB(A) at 1 m
• Integrated anti-vibration mounting pads beneath base frame to suppress mechanical resonance and maintain measurement stability during extended thermal soak periods
• Powered-load testing capability: provision of internal electrical feedthroughs (up to 250 VAC / 10 A) enabling in-situ functional verification of DUTs under thermal stress
• Philips LED observation window lighting with embedded high-temperature-resistant defogging heater (operating up to 150 °C), ensuring clear visual monitoring without condensation interference
• Comprehensive safety protection suite including over-temperature cut-off, compressor high-pressure shutdown, phase failure detection, and door interlock circuitry

Sample Compatibility & Compliance

The OK-HH-408 accommodates test specimens up to 408 L effective volume (W×D×H: 800 × 600 × 850 mm), supporting standard test fixtures, PCB carriers, and small-to-medium mechanical assemblies. Its thermal uniformity meets ±1.5 °C (at 25 °C setpoint) and ±2.0 °C (at –40 °C and +150 °C extremes) per GB/T 5170.2–2017 Clause 6.3. The unit is validated for compliance with GLP-relevant operational traceability requirements, and its control system supports audit-ready logging for ISO/IEC 17025-accredited laboratories. While not pre-certified to FDA 21 CFR Part 11, the data logging architecture is compatible with third-party validation packages for regulated environments requiring electronic record integrity.

Software & Data Management

Equipped with an embedded 7-inch TFT touchscreen HMI running proprietary firmware, the OK-HH-408 provides intuitive profile programming (up to 99 segments), real-time curve visualization, and USB-based data export (CSV format). All temperature setpoints, ramp rates, dwell times, and alarm events are timestamped with microsecond resolution and stored internally for ≥30 days. Optional RS485 Modbus RTU or Ethernet TCP/IP interfaces enable integration into centralized MES or SCADA platforms. Raw sensor data (PT100 Class A) is recorded at 1 Hz sampling rate; exported logs include sensor ID, calibration offset, and firmware revision metadata—supporting full metrological traceability per ISO/IEC 17025 Section 6.5.

Applications

• Temperature cycling qualification of printed circuit boards (PCBs) per IPC-9701 and JEDEC JESD22-A104
• Pre-conditioning of lithium-ion battery cells prior to safety testing (UN 38.3 Thermal Shock)
• Thermal aging studies of polymer encapsulants and conformal coatings per ASTM D3045
• Environmental screening of avionics modules under MIL-STD-810G thermal shock and storage profiles
• Stability assessment of optical sensors and MEMS devices across extended temperature ranges
• Validation of packaging material integrity under accelerated temperature-humidity interaction (when used in tandem with external humidity sources)

FAQ

What is the standard temperature operating range of the OK-HH-408?
The chamber is rated for –40 °C to +150 °C, with stabilization time ≤60 min (from 25 °C to –40 °C) and ≤45 min (to +150 °C), per GB/T 10592–2021 Annex B.
Does the OK-HH-408 support programmable thermal profiles?
Yes—it supports multi-segment ramp-and-soak profiles with adjustable heating/cooling rates (0.5–5.0 °C/min), dwell durations (1 min to 999 h), and loop repetition (1–999 cycles).
Is remote monitoring possible via network connection?
Standard configuration includes RS485; optional Ethernet module enables SNMP-based status polling and secure HTTP API access for integration with LabVIEW, Python, or enterprise LIMS.
What calibration documentation is supplied with delivery?
Each unit ships with a factory calibration certificate (traceable to NIM China), including as-found/as-left data for chamber air sensor, controller thermistor, and safety cutoff device—valid for 12 months.
Can the chamber be validated for GMP/GLP environments?
While the base unit does not include 21 CFR Part 11-compliant user management or electronic signature features, it is fully compatible with IQ/OQ protocols and third-party validation toolkits for regulated quality systems.