Overview
HZAOC GDJS-250C high and low temperature alternating damping heat test chamber is suitable for investigating the moisture resistance of electrical and electronic products, components, parts and materials under different temperature and humidity conditions, as well as the adaptability test of storage, transportation and use in high and low temperature environments.
Features
1. The box adopts the overall structure, the inner side is 1.0mm SUS304B stainless steel plate, the outer side is 1.0mm Cold rolled steel plate sprayed, and the thermal insulation material is ultra-fine Glass thermal insulation cotton.
2. The door sealing is made of double-decked silicone rubber sealing material, and the observation window is a multi-layer conductive film tempered hollow Glass, with a size of 250 × 260mm and a built-in special heating wire to prevent frost and lighting.
3. The side of the box is equipped with φ 50mm test hole with silicone rubber stopper, which has both high and low temperature resistance and thermal insulation efficiency.
4. The heater adopts a porcelain frame nickel-chrome wire electric heater, which has little thermal inertia, long service life, and stable and reliable control.
5. The humidification system adopts steam boiler electric heating method, armored electric heating tube, with water level control and anti-dry burning device.
6. The control system adopts LCD Touchscreen Temperature and Humidity Controller, PT100 Temperature Sensor, Solid State Relay Zero Trigger to improve control accuracy.
7. Safety protection measures include phase loss protection, phase sequence error protection, phase voltage uneven protection, fan overload protection, over-temperature power failure protection, leakage protection, etc.
8. Equipped with independent over-temperature protectors and interlocking devices to ensure the safe operation of the equipment.
Principle
The test chamber adjusts the temperature and humidity in the working room through the evaporator, electric heater, humidifier, fan and other equipment in the air conditioning cabinet. The temperature transducer is placed in a trend, and the control system precisely controls the heating and humidification through PID signals and solid state relays to achieve a stable temperature and humidity environment.
Applications
Electrical and electronic products, components, parts and materials moisture resistance test, high and low temperature environment storage adaptability test, transportation adaptability test, use adaptability test
Standards
GB/T2423.3-2001、GB/T5170.5-96、GB/T10586-89
Steps
1. Turn on the power supply and check that the Power frequency is AC380V.
2. Start the control system through the operation panel and set the required temperature and humidity parameters.
3. Start the circulating fan to ensure that after the fan is running normally, the heating and humidification system will automatically start.
4. Put the sample into the studio and close the door to ensure sealing.
5. Monitor temperature and humidity fluctuations and uniformity to ensure compliance with requirements.
6. After the test is completed, turn off the heating and humidification system, stop the fan, and remove the sample.
Notice
• Check the power supply phase sequence and voltage before operation to avoid phase sequence errors or voltage irregularities.
• Ensure that the circulating fan starts normally, otherwise the heating and humidification system will not operate.
• Pay attention to water level control when using the humidification system to prevent the heater from dry burning.
• Regularly check safety protection devices, such as over-temperature protectors, to ensure their reliability.
• The observation window heating wire and lighting are for observation only, avoid looking directly at it for a long time.
• The test hole stopper needs to be well sealed to maintain stable temperature and humidity in the box.
