English Product Name

Overview

The OK-YT Series Liquid-Bath Thermal Shock Test Chamber is a dual-zone, liquid-immersion–capable thermal shock system engineered for rapid, high-fidelity evaluation of material and component resilience under extreme, alternating temperature conditions. Unlike air-based thermal shock chambers, this system employs physically separated hot and cold liquid reservoirs—each thermally stabilized via independent heating and cryogenic refrigeration circuits—to deliver precise, repeatable thermal transients. The test specimen remains stationary while an automated pneumatic actuator rapidly transfers it between the two fluid baths via a stainless-steel basket, minimizing mechanical disturbance and ensuring consistent exposure geometry. This architecture conforms to the fundamental principle of thermal shock testing defined in MIL-STD-810G Method 503.5 and IEC 60068-2-14: the controlled, abrupt transfer of a sample between two thermally stable environments to induce differential expansion/contraction stresses sufficient to reveal latent defects, interfacial delamination, solder joint fatigue, or seal integrity failure. Designed for laboratory and industrial QA/QC environments, the chamber supports accelerated reliability assessment across aerospace, defense electronics, medical device packaging, automotive ECUs, and advanced ceramics manufacturing.

Key Features

• Large-format color LCD touchscreen controller with intuitive graphical interface, real-time parameter visualization, and multi-language support (English, German, Japanese)
• Dual independent refrigeration circuitry: high-efficiency plate-type heat exchangers paired with a binary ultra-low-temperature cascade system using R404A (high stage) and R23 (low stage) refrigerants
• Liquid-bath architecture ensures superior thermal mass stability and faster temperature recovery versus forced-air alternatives—critical for compliance with stringent recovery time requirements (<5 min per cycle)
• Integrated LAN interface compliant with TCP/IP v4, enabling remote monitoring, data logging, and script-based test sequence execution via standard Ethernet infrastructure
• Triple-mode operational flexibility: standalone high-temperature soak, low-temperature soak, or programmable thermal shock cycling—including customizable dwell times, transition rates, and cycle counts
• Intelligent pre-conditioning logic: automatic pre-cooling or pre-heating initiation prior to scheduled test start, reducing total cycle overhead and improving throughput
• Comprehensive fault diagnostics with on-screen error codes, historical alarm logging, and self-test routines aligned with ISO/IEC 17025 traceability requirements

Sample Compatibility & Compliance

The OK-YT chamber accommodates samples up to 70 cm × 60 cm × 60 cm (W×H×D), with standardized 50 mm diameter cable/port access and two-tier SUS#304 stainless steel shelves. Its design supports rigid and semi-rigid specimens including PCB assemblies, hermetically sealed sensors, polymer housings, composite laminates, and metallic fasteners. All models are certified to meet critical international standards for environmental stress screening, including: ASTM D5229/D5229M (low-temperature impact resistance), ISO 16750-4 (road vehicles—electrical disturbances), MIL-STD-810G Method 503.5 (temperature shock), IEC 60068-2-14 (change of temperature), and GJB 150.5A-2009 (Chinese military standard for temperature shock). Structural insulation complies with UL 94 V-0 fire rating, and refrigerant selection adheres to EU F-Gas Regulation (EC) No. 517/2014 and EPA SNAP program requirements.

Software & Data Management

The embedded controller runs proprietary firmware supporting up to 99 programmable test profiles, each with up to 999 segments and 999 cycles. Data acquisition records temperature at 1 Hz resolution from three calibrated PT100 sensors (hot zone, cold zone, test zone), stored internally with timestamped metadata. Export options include CSV via USB drive or network transfer using FTP/SFTP protocols. Optional PC-based software provides GLP-compliant audit trails, electronic signatures (21 CFR Part 11 ready), trend analysis, and automated report generation in PDF/Excel formats. All logged data includes operator ID, test ID, calibration status flags, and environmental ambient conditions—enabling full traceability for ISO 9001:2015 and AS9100D audits.

Applications

This chamber serves as a core tool in qualification testing for: printed circuit board assemblies subjected to reflow soldering thermal cycling; MEMS sensor packages undergoing die attach reliability validation; lithium-ion battery modules evaluated for electrolyte seal integrity; optical lens coatings assessed for microcrack propagation; and aerospace-grade aluminum alloys tested for precipitate coarsening effects. It is routinely deployed in R&D labs at Tier-1 automotive suppliers, FDA-registered medical device manufacturers, and national metrology institutes conducting inter-laboratory comparison studies under ILAC MRA frameworks.

FAQ

What is the maximum allowable sample weight for the OK-YT-225 model?

The lifting mechanism supports loads up to 30 kg, with dynamic balance verified per ISO 10816-3 vibration criteria.

Can the chamber operate continuously for extended qualification tests?

Yes—designed for unattended 72-hour operation with integrated compressor protection, oil-level monitoring, and automatic defrost scheduling.

Is third-party calibration documentation available?

Factory calibration certificates (NIST-traceable) are included; optional UKAS-accredited calibration services are available upon request.

Does the system support custom thermal profiles beyond standard shock cycles?

Absolutely—the controller allows user-defined ramp rates, non-linear dwell sequences, and conditional branching based on real-time sensor feedback.

How is condensation managed during cold-to-hot transitions?

A heated purge air system with dew point control (<−40 °C) activates automatically during transfer to prevent moisture ingress into the hot bath.