IEC Standard Damp Heat and Freeze Testing Equipment

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Thermal Cycling Damp Heat and Freeze Test Chamber is an environmental reliability testing system designed to evaluate photovoltaic modules under extreme temperature variation and high-humidity freezing conditions. By repeatedly cycling between high temperature, low temperature, and damp heat environments, the chamber simulates day–night temperature differences, seasonal transitions, and freeze–thaw stresses encountered during long-term outdoor operation. The system is used to verify structural integrity, electrical performance stability, and encapsulation durability of photovoltaic modules, serving as a critical test platform for design validation, type testing, and quality control.

Standards

(1)GB/T 9535 Crystalline Silicon Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval

(2)GB/T 18911 Photovoltaic Modules – Environmental Test Methods

(3)GB/T 2423.1 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test A: Cold

(4)GB/T 2423.2 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test B: Dry Heat

(5)GB/T 2423.3 Environmental Testing for Electric and Electronic Products – Part 2: Test Methods – Test Ca: Damp Heat, Steady State

(6)IEC 61215 Terrestrial Photovoltaic (PV) Modules – Design Qualification and Type Approval

(7)IEC 61730 Photovoltaic (PV) Module Safety Qualification

(8)IEC 60068-2-1 / IEC 60068-2-2 / IEC 60068-2-30 Environmental Testing – Cold, Dry Heat, Damp Heat

(9)UL 1703 Standard for Flat-Plate Photovoltaic Modules and Panels

(10)JIS C 8918 Environmental Test Methods for Photovoltaic Modules (partially applicable)

Parameters

Item	Technical Specification
Temperature range	-40 ℃ to 85 ℃
Temperature fluctuation	≤ ±1 ℃
Temperature deviation	≤ ±1 ℃
Temperature uniformity	≤ ±2 ℃
Heating and cooling rate	Compliant with IEC 61215 requirements
Humidity range	30 %RH to 98 %RH
Relative humidity deviation	±3 %FS; 85 ±2 %RH; 90 ±2 %RH
Humidity fluctuation	±2 %RH
Humidity uniformity	≤ 2 %RH
Temperature change rate	≤ 100 ℃/h
Extreme temperature dwell time	≥ 10 min
Test cycle count	200 cycles or 50 cycles
Maximum sample capacity	12 photovoltaic modules
Inner chamber dimensions	Approx. 1.5 × 2.5 × 1.5 m (L × W × H)
Outer chamber dimensions	Approx. 2.5 × 3.0 × 2.5 m (L × W × H)
Power supply	AC 380 V / 60 Hz

Features

High-precision temperature and humidity control system meeting stringent photovoltaic testing requirements

Supports both thermal cycling and damp heat freeze test modes, covering all relevant IEC 61215 clauses

Independent closed-loop control of temperature and humidity ensures fast response and stable operation

Large chamber volume enables simultaneous testing of multiple large-size photovoltaic modules

Touchscreen programmable control supports multi-step program editing and cyclic operation

Real-time display of setpoint and actual curves ensures intuitive monitoring and data traceability

Power failure memory and automatic recovery functions maintain test continuity

Environmentally friendly refrigeration system with reliable operation and low maintenance cost

Accessories

(1)Programmable control system with touchscreen interface

(2)High-precision industrial-grade temperature and humidity sensors

(3)Refrigeration compressor unit using environmentally friendly refrigerant

(4)Photovoltaic module sample racks compatible with multiple module sizes

(5)Drainage and condensation management system

(6)Optional data acquisition and management software for PC connection and data export

(7)Optional remote monitoring module for operation status viewing

(8)Consumable sealing strips for periodic replacement

(9)Humidity water filtration components to ensure humidification water quality

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