Overview
HZAOC GDJS-100C 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, the observation window is a multi-layer conductive film tempered hollow Glass, and the built-in special heating wire is frost-proof and lighting.
3. 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.
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 and humidification 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 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 temperature transducer is placed in a trend, and the air is circulated by the way of upper air supply and lower air return. The heating system is controlled by the PID signal of the controllable pulse duty cycle output by the instrument, which is controlled by the solid state relay; the humidification system adopts the PID control mode and uses the SSR control of the non-contact point periodic pulse width adjustment. The control system has a main controller and an independent over-temperature protector to ensure the accurate adjustment of temperature and humidity and the safe operation of the equipment.
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. 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. Remove the sample, clean and maintain the equipment.
Notice
• Power frequency check meets AC380V requirement before operation.
• Make sure the door is well sealed to prevent temperature and humidity leakage.
• Before starting the heating and humidification system, the circulating fan must be started first.
• Regularly check the water level control device and anti-dry burning device to avoid damage to the equipment.
• Pay attention to the status of the over-temperature protector, and repair it in time if there is any failure.
• Avoid opening the door frequently when the equipment is running, which will affect the test accuracy.
• Disconnect the power supply during maintenance to ensure safety.
