Environmental Chamber for Environmental Testing

Introduction

An environmental chamber, also known as a climate test chamber, is an enclosed area in which the temperature and humidity conditions can be modified as per need.

The major function of this device is the environmental testing of objects which provides a preview of the resistance or changes an object will offer when exposed to certain environmental conditions in real life. The specimen size may range from small household appliances to large automobiles. Product validation is the main purpose of this device.

 

DESCRIPTION

LISUN High and Low-Temperature Humidity Chamber are according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5.. It is used to test the CFL/LED, which meets IES LM-80-08 and various electrical products and materials. The chamber is made of SUS304 Steel.

It is also equipped with a thermal insulation system of polyurethane hard foam ultra-fine glass fiber and a high temperature aging silicone rubber sealing strip fitted in the doorframe. The temperature sensor of the Environmental chamber is platinum PT100ohm.

TEMPERATURE CONTROL

As the environmental testing is done in both extremes of temperature, the device is installed with independent heating and refrigerating systems. The heating system uses a nickel-chrome electric heater. The refrigerating system is an enclosed air-cooled single-stage compression refrigeration mode.

It offers a temperature range from 70 to 150 degrees Celsius, making it quite suitable for testing the temperature effect on any product. Usually, the conditions under which a product is tested are kept extreme to the extent which might never be experienced in the natural environment.

HUMIDITY CONTROL

The process of humidification of the chamber involves increasing the working pressure of water vapors. You can also spray water on the test box wall, which helps control the saturation pressure of the water surface according to the temperature. The humidity range of the device is from 30% to 98%.

OTHER SUPPORTING SYSTEMS

The LISUN environmental chamber comprises some additional systems for better environmental testing, including a circulation system and a safety protection system. The circulation system includes a temperature resistant and low noise air-conditioned motor and a multi-blade centrifugal wind wheel.

The safety protection system of the device includes electric leakage, short circuit, over-temperature, motor overheating, compressor pressure, overload, over-current protection.

SPECIFICATIONS 

Workroom dimensions (cm): 100x100x150
Fluctuation/Evenness: ±0.5°C/ ±2°C
Temperature Rise Speed: 1.0°C~3.0°C/min
Temperature Down Speed: 0.7°C~1.0°C/min

WORKING of Environmental Chamber

1. Turn on the machine. The screen displays the current temperature and humidity inside the chamber.
2. Add the desired temperature and humidity to the setup.
3. Once the temperature and humidity values have been selected, you can click on ‘Run’ to start the chamber.
4. The temperature and humidity control systems will start operating and working until the desired conditions are achieved.
5. The conditions will be maintained for a particular period selected from the given options.
6. After selecting the period, click ‘Run’ to start the machine again.
7. The temperature setpoint will be achieved before the humidity setpoint.
8. You can also choose to view the graph alongside to monitor the working of the chamber.
9. The graph will represent temperature and humidity with different colors.
10. A pattern can also be set up by selecting pattern mode from the options.
11. One cycle of the chamber requires four segments; 1st segment: rising point/ decreasing point, 2nd segment: stabilizing temperature, 3rd segment: increasing/ decreasing point of temperature/ humidity, 4th segment: stabilizing temperature/ humidity.

PRECAUTIONS

• Do not open the door to check the sample while the machine runs to avoid any injury.
• Lock the door properly by closing the chains manually to prevent any external harm to the sample.
• Ensure the machine maintains a distance of at least 50cm from the surrounding objects for heat dissipation.
• Install the air switch with a leakage protection function.
• The wire diameter of the switching power cable should not be less than the wire diameter of the machine’s power cable and should be grounded.

DAILY MAINTENANCE

• Keep the surrounding of the machine clean.
• Clean the condenser fins of the machine’s refrigeration system regularly.
• Check the leakage function of the leakage switch regularly.
• Clean the water container of the machine regularly.
• Make sure that no pipe of the machine is blocked. USES The environmental chamber is used for the following:
• To test the cold resistance of the sample.
• To test the heat resistance of the sample.
• To test the quality of the products.
• To verify the product design.

FREQUENTLY ASKED QUESTIONS

How accurate is the LISUN environmental chamber?

It offers authentic results with temperature accuracy being 0.1°C, and humidity accuracy of 0.1% R.H. The temperature controller can also communicate with the PC via RS-232, making it easy to monitor and thus maintain the required conditions. The supporting systems assisting the temperature and humidity controllers make it even more reliable.

How are the electrical cables protected despite the immense heating?

For the machine to be efficient, there should be a fast heating rate to achieve higher temperatures. This requires a large heating system power of the text box. At the same time, the heating system is composed of high power resistance wire for protection.

What is a climate test chamber?

Climate test chambers are defined as enclosed spaces used for evaluation of impact of certain environmental conditions on lighting luminaires, and household applications.

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