Overview
HZAOC GDJS-500C high and low temperature alternating damping heat test chamber is suitable for examining 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. The box body adopts an overall structure, the inner side is stainless steel plate, the outer side is plastic sprayed Cold rolled steel plate, the thermal insulation material is ultra-fine glass thermal insulation cotton, the door is double-decked silicone rubber sealing, and the observation window is multi-layer conductive film tempered hollow Glass with frost-proof heating wire and lighting.
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 to ensure sealing.
3. The observation window is a multi-layer conductive film tempered hollow Glass, the size is 250 × 260mm, and the built-in special heating wire is frost-proof and lighting.
4. The side of the box is equipped with φ 50mm test hole, the stopper is silicone rubber low foam material, high and low temperature resistance and thermal insulation.
5. The heater adopts a porcelain frame nickel-chrome wire electric heater, which has little thermal inertia, long service life, and stable and reliable control.
6. The humidification system adopts steam boiler electric heating and humidification method, PID control, water level control and anti-dry burning device.
7. The control system adopts LCD Touchscreen Temperature and Humidity Controller, PT100 Temperature Sensor, Solid State Relay Zero Crossing Trigger to improve control accuracy.
8. 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.
9. Equipped with independent over-temperature protectors and interlocking devices to ensure the safety of the equipment.
Principle
The test chamber realizes temperature and humidity control through evaporators, electric heaters, humidifiers, fans and other equipment in the air conditioning cabinet. The heater adopts a porcelain frame nickel-chrome wire electric heater, which is controlled by a solid-state relay by outputting a controllable pulse duty cycle PID signal from the instrument; the humidification system adopts a steam boiler electric heating and humidification method, PID control mode, and uses a non-touch point periodic pulse width adjustment SSR control. The temperature transducer is placed in a trend, and the air supply method is upper air supply and lower air return to ensure uniform distribution of temperature and humidity.
Applications
Electrical and electronic products, components, parts and materials moisture resistance test, high and low temperature environment storage adaptability test, high and low temperature environment transportation adaptability test, high and low temperature environment adaptability test
Standards
GB/T2423.3-2001、GB/T5170.5-96、GB/T10586-89
Steps
1. Connect the power supply and ensure that the voltage is AC380V.
2. Open the door of the test chamber and place the test sample in the working room.
3. Close the door and make sure the sealing is good.
4. Set the required temperature and humidity parameters through the operation panel.
5. Start the circulating fan and check that the system is operating normally.
6. Start the heating and humidification system and start the test.
7. Monitor the test process and observe changes in temperature and humidity.
8. After the test, turn off the heating and humidification system and stop the fan.
9. Open the door and take out the sample.
Notice
• Power frequency check meets AC380V requirement before operation.
• Make sure the door is well sealed to prevent temperature and humidity leakage.
• Check whether the circulating fan is normal before starting to avoid the heating and humidification system running when the fan is not started.
• Regularly check the water level control device and anti-dry burning device to ensure the safety of the humidification system.
• Monitor the over-temperature protector function to prevent the equipment from overheating.
• Avoid running in high temperature or high humidity environment for a long time, so as not to affect the life of the equipment.
• During cleaning and maintenance, disconnect the power supply to prevent the risk of electric shock.
