LabCompanion LT-150 Standard Temperature & Humidity Environmental Test Chamber

Overview

The LabCompanion LT-150 Standard Temperature & Humidity Environmental Test Chamber is an engineered platform for accelerated environmental stress testing of materials, components, and finished products under precisely controlled thermal and hygrothermal conditions. Designed in accordance with IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (damp heat, cyclic), and ISO 16750-4 (road vehicles — environmental conditions), the chamber delivers stable, repeatable, and traceable test environments across a wide operational envelope. Its core architecture integrates independent heating, cooling, humidification, and dehumidification subsystems—each governed by a digital PID controller with SSR-driven actuation—ensuring minimal cross-coupling and high dynamic response. The chamber operates on the principle of forced-air convection with optimized airflow distribution, enabling uniform temperature and humidity profiles throughout the working volume. It supports both steady-state (e.g., constant 40°C / 93% RH) and time-varying (e.g., ramp-hold cycles per MIL-STD-810H Method 502.7) test profiles, making it suitable for reliability qualification, design verification, and quality assurance protocols in electronics, automotive, aerospace, medical device, and packaging industries.

Key Features

• Stainless steel (SUS#304) construction for interior chamber, outer casing, and shelving—resistant to corrosion and compliant with ISO 14644-1 cleanroom-compatible surface finish standards.
• Dual-stage refrigeration system with imported high-efficiency compressors, enabling stable operation down to –40°C without performance degradation or condensation-induced control instability.
• Steam-based humidification using reverse-osmosis (RO)-purified water supply, minimizing mineral deposition and ensuring long-term sensor accuracy and chamber hygiene.
• Digital PID controller with real-time display, programmable multi-segment cycling (up to 999 steps), loop repetition, and user-defined alarm thresholds for temperature and humidity deviation.
• Linear analog outputs (0–10 V DC and 4–20 mA) for integration with external data acquisition systems, SCADA platforms, or GLP-compliant chart recorders (e.g., six-point Japanese-made recorder).
• Vacuum double-glass observation window with internal anti-fog coating, facilitating non-intrusive visual monitoring during extended tests without compromising environmental integrity.
• Comprehensive safety architecture including over-temperature cutoff, compressor overload protection, phase failure detection, low-water-level interlock, and grounded leakage current protection per IEC 61000-6-2 EMC requirements.

Sample Compatibility & Compliance

The LT-150 accommodates samples up to 50 × 60 × 75 cm (W×D×H) with adjustable stainless-steel shelves supporting loads up to 30 kg per shelf. Its uniformity specifications—±0.1°C temperature and ±4% RH spatial variation across the working volume—are validated per ASTM E744 and IEC 60068-3-5. The chamber meets structural and operational requirements for ISO/IEC 17025-accredited laboratories conducting environmental testing as part of calibration or conformity assessment activities. All electrical components comply with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), while insulation materials are halogen-free and RoHS-compliant. Optional validation packages include IQ/OQ documentation templates aligned with FDA 21 CFR Part 11 and EU Annex 11 expectations for regulated environments.

Software & Data Management

While the LT-150 operates natively via its embedded digital controller, optional Ethernet or RS-485 interfaces enable remote supervision and data logging through LabCompanion’s PC-based TestSuite™ software (v3.2+). This application supports real-time graphing, automated report generation (PDF/CSV), audit trail logging with user authentication, and export of raw time-series data compatible with JMP, MATLAB, or Minitab for statistical process analysis. All logged parameters—including chamber setpoints, actual values, alarm events, and controller status flags—are timestamped with millisecond precision and stored with immutable metadata to satisfy GLP/GMP data integrity requirements.

Applications

• Electronics: Thermal cycling of PCBAs, validation of conformal coating durability, solder joint reliability under damp heat (JESD22-A101).
• Automotive: Component qualification per GMW3172, Ford CETP, and VW 80101; battery module thermal runaway screening at elevated humidity.
• Pharmaceuticals: Stability testing of primary packaging per ICH Q1A(R2); excipient compatibility studies under accelerated aging conditions.
• Materials Science: Polymer hydrolysis rate determination, adhesive bond strength degradation analysis, and textile colorfastness evaluation.
• Aerospace: Environmental screening of avionics enclosures per RTCA DO-160 Section 4 (temperature) and Section 7 (humidity).

FAQ

What is the standard calibration interval recommended for the LT-150’s temperature and humidity sensors?
LabCompanion recommends annual calibration against NIST-traceable references, with in-house verification using portable metrology-grade probes (e.g., Rotronic HC2-S) before each critical test campaign.
Can the LT-150 be integrated into a facility-wide environmental monitoring system (EMS)?
Yes—the analog outputs and optional Modbus TCP interface support seamless integration with industry-standard EMS platforms such as Siemens Desigo CC or Honeywell Experion PKS.
Is the chamber suitable for testing lithium-ion batteries under UN 38.3 thermal abuse conditions?
When configured with the optional –40°C to +150°C range and equipped with explosion-proof lighting and venting provisions (per UL 60079-0), the LT-150 may be adapted for UN 38.3 thermal cycling; however, full compliance requires third-party hazardous location certification.
Does the controller support deviation reporting per ISO 9001 clause 8.7?
Yes—the controller logs all out-of-specification excursions with timestamps, duration, magnitude, and operator ID (when authenticated), enabling root cause analysis and corrective action tracking.
What maintenance is required to sustain specified humidity accuracy over time?
Quarterly cleaning of the steam generator tank and RO filter cartridge, biannual inspection of the humidity sensor’s protective sintered metal cap, and annual recalibration of the capacitive RH sensor using saturated salt solutions are advised.