Overview
GDJS-225E high and low temperature alternating damping heat test chamber is suitable for inspecting the moisture resistance of electrical and electronic products, components, parts and materials under different temperature and humidity conditions, and can also be used as a storage, transportation and use in high and low temperature environment adaptability test.
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.
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 equipped with 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 porcelain frame nickel-chrome wire electric heater, which has small thermal inertia, long service life, and stable and reliable PID control.
6. The humidification system adopts steam boiler electric heating and humidification method, armored electric heating tube, 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 Control Heating Output.
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 an independent over-temperature protector, the heating power can still be reliably disconnected when the main controller fails.
10. The electrical control system is equipped with an interlock device, and the heating and humidification system cannot be started when the circulating fan is not started or overloaded.
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 controls the solid state relay through the PID signal to realize the precise adjustment and stable control of temperature and humidity.
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 put the test sample into the studio.
3. Close the door and make sure the double-decked silicone rubber is well sealed.
4. Set the required temperature and humidity parameters through the operation panel.
5. Start the circulating fan, confirm that there is no overload, and then start the heating and humidification system.
6. Monitor temperature and humidity changes, and observe the status of the sample through the observation window and lighting.
7. After the test is completed, stop the heating and humidification system and turn off the fan.
8. Open the door, take out the sample, and clean the studio.
Notice
• Power frequency check meets AC380V requirement before operation.
• Make sure the circulating fan starts normally, otherwise the heating and humidification system will not work.
• Regularly check safety protection devices, such as over-temperature protectors, leakage protection, etc.
• Pay attention to water level control during the use of the humidification system to prevent the heater from dry burning.
• The test hole stopper needs to be well sealed to maintain thermal insulation efficiency.
• The observation window heating wire and lighting are only used when needed to avoid long-term opening.
Do not open the door frequently during the operation of the equipment, so as not to affect the temperature and humidity stability.
• Disconnect the power supply during maintenance to ensure safety.
