Environmental Chamber for Thermal Cycling and Humidity-Freeze Test-Product - Shanghai Morningtest Environmental Chambers Co.,Ltd.

Environmental Chamber for Thermal Cycling and Humidity-Freeze Test

Environmental chamber for Thermal Cycling and Humidity-Freeze Test are environmental tests that can be used to evaluate the performance of PV modules in extreme weather

In Humidity-Freeze Test, PV modules are subjected to cycling between temperatures 85°C with relative humidity 85 % and -40°C. PV modules are subjected to 10 complete cycles in the closed climatic chamber in accordance with the profile on the picture bellow. The purpose is to determine the ability of the module withstand against humidity penetration.

Thermal cycling tests are done for PV module certification, a current within +/-2 percent of the current measured at the peak power when the temperature of the solar module is above 25° C should be injected. The tested solar module is subjected to the cycling temperature limits of an extreme low temperature of – 40°C ± 2°C and an extreme high temp of + 85°C ± 2°C .

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Test Standard	Testing Method
IEC61215-2	MQT 11	Thermal cycling test
IEC61215-2	MQT 12	Humidity-freeze test
IEC61730-2	MST 51	Thermal cycling test
	MST 52	Humidity-freeze test
	MST 55	Cold conditioning test
	MST 56	Dry heat conditioning test

1. Technical requirements
Temperature and humidity technical requirements
1) Temperature range: -45-130℃
2) Temperature deviation (in steady state): ≤ ±2°C
3) Temperature uniformity (in steady state): ≤ 2°C
4) Adjustable linear heating rate (from -40°C to +85°C) under full load: 1.5-3.3℃/min
5) Adjustable linear cooling rate (from 85°C to -40°C) under full load: 1.5-3.3℃/min
6) Humidity range: 20% to 98% R.H. (see temperature and humidity range chart below)
7) Humidity deviation (in steady state): ±2.5% RH
8) Temperature range for humidity control: 20°C to 90°C
9) Humidity deviation:
≤ ±2.5% RH (humidity > 75% RH)
≤ ±5.0% RH (humidity ≤ 75% RH)
≤ ±2.5% RH (constant at 85℃/85% RH in UL1703 Figure36.1 Humidity-freezing cycle test)

2. Chamber structure
1). Insulation material: Polyurethane foam, insulation thickness ≥ 150mm
2). Inner wall: High-quality heat-resistant and corrosion-resistant SUS304 stainless steel, thickness 2.0mm
3). Outer wall: High-quality A3 steel plate electrostatic spray, steel plate thickness: 1.2mm
4). Inner chamber bottom: High-quality non-slip SUS304 stainless steel patterned plate, thickness 3.0mm

3. Control system
1). Control system: Touch screen display + PLC combination
2). Touch screen size: Not less than 10 inches
3). System setting accuracy: Temperature accuracy: 0.1°C Response time: 1S
4). User program capacity: Programmable quantity greater than 100, each program greater than 999 steps, capable of cycling tests greater than 100 times, and able to link and run programs arbitrarily. Programs can be copied and deleted.
5). Number of cycles: 999 cycles
6). Operation mode: Switch between program operation or constant operation
7). The control system has a self-check function during startup. If there is a malfunction, the equipment cannot start and an error alarm menu will pop up. It also has a timed operation function. As long as the set time is reached, the system will stop automatically.
8). Detailed fault display and alarm. When the test chamber is abnormal, the controller displays the fault status in Chinese characters.
9). Equipped with historical data table trend chart (at least 6 months of retention) and storage function for historical fault records.
10). USB data export function and data analysis
11). LAN network remote monitoring (with host computer software) can be used in conjunction with PID and internal continuity testing system

4. Refrigeration system
German GEA (BOCK) semi-hermetic compressor Quantity: 2 units

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