SETH SET-K Three-Zone Thermal Shock Test Chamber

Overview

The SETH SET-K Three-Zone Thermal Shock Test Chamber is an engineered solution for evaluating the reliability and structural integrity of electronic components, automotive parts, polymer assemblies, aerospace hardware, and military-grade electronics under rapid, repeated thermal transitions. Based on the principle of forced-air thermal transfer between isolated high-temperature, low-temperature, and test zones, the SET-K eliminates mechanical movement of test specimens—ensuring zero vibration-induced artifacts during shock cycles. Unlike single- or dual-zone chambers relying on chamber-wide temperature ramping, the three-zone architecture enables precise, independent control of pre-conditioning temperatures and guarantees sub-5-minute temperature recovery times after zone switching. This design conforms to the fundamental thermodynamic requirements of IEC 60068-2-14 and GB/T 2423.22 for thermal shock testing, where specimen exposure time, transition speed, dwell duration, and cycle repeatability are rigorously defined parameters.

Key Features

• Three-zone configuration (pre-heating chamber, pre-cooling chamber, test chamber) enabling true static-sample thermal shock testing per MIL-STD-202 Method 107 and EIA-364-32 protocols
• Servo-controlled refrigerant flow system achieving >40% energy reduction versus conventional fixed-orifice compressors
• Pure aluminum finned evaporator with optimized surface-area-to-volume ratio, reducing thermal inertia and shortening energy storage time
• Automated air damper switching mechanism with ≤10-second transition time and ≤5-minute temperature stabilization post-switch
• Stainless steel (SUS304) interior chamber walls and electrophoretically coated cold-rolled steel exterior housing for corrosion resistance and long-term dimensional stability
• Integrated PLC-based PID + PWM + SSR temperature regulation with JIS-compliant PT100 RTD sensors (3-point measurement) ensuring ±2 °C uniformity across the test volume
• Touchscreen HMI with bilingual (English/Chinese) interface, real-time curve plotting, and programmable multi-step profiles including hold, ramp, and shock sequences
• Comprehensive safety architecture: over-temperature cutoff, compressor high-pressure shutdown, phase-loss protection, water-flow monitoring (for water-cooled models), and motor thermal overload detection

Sample Compatibility & Compliance

The SET-K accommodates test specimens up to 800 × 700 × 600 mm (W×H×D), supporting full-system validation of automotive ECUs, PCBAs, battery modules, and sealed optoelectronic housings. Its static-test methodology eliminates positional uncertainty inherent in basket-transfer systems—critical for validating solder joint fatigue, adhesive delamination, and CTE mismatch failure modes. The chamber meets regulatory traceability requirements for GLP and GMP environments via built-in audit trail logging (user actions, parameter changes, alarm events), compliant with FDA 21 CFR Part 11 data integrity principles when paired with validated software. All thermal profiles are fully reproducible and certifiable against ISO/IEC 17025-accredited calibration procedures using NIST-traceable reference probes.

Software & Data Management

Equipped with RS-232 and USB interfaces, the SET-K supports remote program editing, real-time data streaming, and automated report generation via PC-based configuration software. Logged datasets include timestamped chamber setpoints, actual sensor readings, damper status, compressor run hours, and alarm history—exportable in CSV or Excel format for statistical process analysis (SPC). Firmware supports firmware-over-the-air (FOTA) updates and retains ≥30 days of continuous operation logs without external storage. Optional Ethernet module enables integration into centralized MES or LIMS platforms via Modbus TCP or OPC UA protocols.

Applications

• Qualification testing of avionics modules per DO-160 Section 4 (Temperature Shock)
• Reliability screening of consumer electronics prior to mass production (HAST pre-screening alternative)
• Validation of conformal coating adhesion and encapsulant integrity under cyclic CTE stress
• Failure mode analysis of MEMS devices subjected to extreme thermal gradients
• Material compatibility assessment for cryogenic-to-ambient sealants and gasket compounds
• Accelerated life testing of Li-ion battery packs under thermal abuse conditions

FAQ

What standards does the SET-K comply with?
The chamber is designed and verified to meet IEC 60068-2-14, GB/T 2423.22, EIA-364-32, and MIL-STD-202 Method 107 for thermal shock testing.
Can the SET-K operate as a standalone high-temperature or low-temperature chamber?
Yes—the controller allows independent activation of heating or cooling circuits, enabling steady-state environmental testing at +60 °C to +200 °C or +20 °C to −80 °C without initiating shock cycles.
Is the temperature recovery time verified per IEC 60068-2-14 Annex A?
Yes; recovery time is measured using calibrated PT100 sensors placed at geometric center and corners of the test zone, confirming ≤5 minutes from −40 °C to +150 °C and vice versa.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and filter-drier replacement is scheduled every 12 months or 4,000 operating hours; full system performance verification (leak check, superheat/subcooling, pressure drop) is required annually.
Does the system support 21 CFR Part 11-compliant electronic signatures?
When operated with validated third-party software and configured user-role permissions, the data logging and audit trail functions satisfy Part 11 requirements for electronic records and signatures in regulated industries.