LabCompanion HH-72 Programmable Environmental Test Chamber (Temperature & Humidity)

Overview

The LabCompanion HH-72 is a precision-engineered programmable environmental test chamber designed for rigorous temperature and humidity conditioning in accordance with international reliability testing standards. It operates on the principle of forced-air convection combined with surface-evaporation humidification and dual-stage refrigeration (using either Tecumseh/Tecumseh-derived or Embraco/Gaulin semi-hermetic compressors), enabling stable, repeatable control across wide thermal and hygrometric ranges. The chamber supports steady-state and cyclic environmental stress profiling—critical for evaluating material degradation, solder joint integrity, polymer aging, condensation resistance, and long-term functional stability of electronic components, aerospace subsystems, automotive ECUs, and medical device enclosures. Its architecture conforms to the physical and metrological requirements defined in IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-3 (damp heat, steady-state), and MIL-STD-810F Method 507.4 (humidity), ensuring data traceability and test validity under GLP- and GMP-aligned laboratory practices.

Key Features

• Q8-900 bilingual (English/Chinese) touchscreen controller with real-time graphical display of setpoint vs. actual temperature/humidity curves, enabling intuitive program creation and live process monitoring.
• High-capacity programmability: up to 120 user-defined test programs, each containing up to 1200 individual segments; cycle repetition configurable to 999 iterations; segment duration adjustable from 1 minute to 99 hours 59 minutes.
• Advanced control algorithm with nine independent PID parameter sets—tunable per operational zone—to ensure minimal overshoot, rapid stabilization, and high reproducibility across dynamic ramp-and-soak profiles.
• Uniform air distribution system featuring rear-mounted centrifugal blower and optimized baffle geometry, achieving ≤±2 °C temperature deviation and ±2 %RH (≥75 %RH) humidity uniformity per GB/T 2423.3 and IEC 60068-2-3.
• Dual-glazed observation window with vacuum-sealed, anti-frost coating—enabling unobstructed visual inspection without internal condensation interference.
• Front-access automatic water replenishment system using deionized or distilled water, integrated with level sensors and leak-resistant stainless-steel reservoir.
• Robust thermal insulation: high-density polyurethane foam (≥100 mm thickness) combined with ultra-fine glass fiber lining—reducing external heat transfer and improving energy efficiency during prolonged dwell cycles.
• Comprehensive fault diagnostics: on-screen error codes (e.g., E01: compressor overload, E07: humidity sensor drift), audible alarm, and automatic safety shutdown with event logging.

Sample Compatibility & Compliance

The HH-72 accommodates samples up to 500 × 600 × 500 mm (W×H×D) in internal volume, with standardized 50 mm diameter test port, two stainless-steel shelves, four shelf supports, and internal fluorescent lighting. Its construction meets mechanical and electrical safety requirements per GB 4793.1 (IEC 61010-1), while its performance validation follows ISO/IEC 17025-relevant uncertainty protocols. The chamber satisfies mandatory test conditions for qualification per JEDEC JESD22-A101-B (constant damp heat), JESD22-A103-C (high-temperature storage), and JESD22-A119 (low-temperature storage), as well as military-grade environmental screening per MIL-STD-810F Methods 501.4 (high temperature), 502.4 (low temperature), and 507.4 (humidity). It also supports accelerated life testing per GJB 150.9 (Chinese military standard for damp heat) and complies with ASTM D4332 for conditioning of plastic specimens prior to mechanical evaluation.

Software & Data Management

The embedded controller supports bidirectional RS232 serial communication for local PC-based supervision via proprietary LabCompanion ChamberControl™ software (Windows 10/11 compatible), enabling remote start/stop, real-time data streaming, profile upload/download, and automated report generation (CSV/PDF). Optional RS485 interface enables daisy-chain integration into multi-chamber test farms. All operational events—including program execution status, alarm triggers, manual overrides, and calibration interventions—are timestamped and stored with audit-trail capability compliant with FDA 21 CFR Part 11 Annex 11 requirements when paired with validated software modules. Data retention exceeds 30 days at 1-second logging resolution; export formats include Excel-compatible .csv and encrypted .bin archives for third-party analysis tools (e.g., MATLAB, JMP, Minitab).

Applications

• Accelerated reliability assessment of PCB assemblies under temperature-humidity bias (THB) per IPC-9708 and JEDEC J-STD-020.
• Validation of conformal coating adhesion and dielectric integrity for automotive ADAS sensors exposed to tropical climatic profiles.
• Stability testing of pharmaceutical packaging materials (blister foils, HDPE vials) per ICH Q1A(R2) guidelines under long-term and intermediate storage conditions.
• Pre-conditioning of lithium-ion battery cells prior to cycling tests, simulating real-world storage environments per UL 1642 and UN 38.3 Section 4.4.
• Material compatibility studies for elastomeric seals, gaskets, and potting compounds used in outdoor telecom enclosures.
• Environmental stress screening (ESS) of avionics LRUs per RTCA DO-160 Section 4 (temperature) and Section 7 (humidity).

FAQ

What standards does the HH-72 comply with for temperature and humidity testing?
It meets GB/T 2423.1–4, IEC 60068-2-1/2/3, MIL-STD-810F Methods 501.4/502.4/507.4, JIS C60068-2-1/2/3, JESD22-A101-B/A103-C/A119, and GJB 150.9.
Can the HH-72 perform temperature-humidity cycling with precise dwell and ramp control?
Yes—its 1200-segment programmability supports complex multi-step profiles including linear ramps, plateaus, and conditional branching based on elapsed time or sensor thresholds.
Is the controller firmware upgradable, and does it support electronic signature functionality?
Firmware updates are performed via USB; electronic signatures and role-based access control are available in the validated software package compliant with 21 CFR Part 11.
What type of refrigeration system is used, and what is the typical cooling rate from +20 °C to −20 °C?
It employs a wind-cooled, cascade-free single-stage system with a Tecumseh or Embraco compressor; cooling rate from +20 °C to −20 °C is approximately 50 minutes (empty chamber, ambient 20 °C).
Does the HH-72 support external data acquisition via analog outputs or digital I/O?
Standard configuration includes RS232 only; analog voltage outputs (0–5 V or 4–20 mA) and dry-contact I/O are available as factory-installed options upon request.