Overview
HZAOC GDJS-800B 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.
3. The observation window is a multi-layer conductive film tempered hollow Glass, size 250 × 260mm, built-in special heating wire anti-frost 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. There is an air conditioning cabinet at the back of the studio, and equipment such as evaporators, electric heaters, humidifiers, and fans are installed.
6. The temperature transducer is placed in a trend, and the air supply method is the upper air supply and the lower air return.
7. The heater adopts porcelain frame nickel-chrome wire electric heater, which has little thermal inertia and long service life. It is controlled by solid-state relay PID.
8. 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.
9. The control system adopts LCD Touchscreen temperature and humidity controller, Sensor is PT100, solid state relay zero-crossing trigger control heating output.
10. 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.
11. The operation panel is located in the upper left part of the test chamber, and is equipped with power supply, lighting and various function operation buttons and fault indicators.
12. Equipped with an independent over-temperature protector, the heating power can be reliably disconnected when the main controller fails.
13. 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 realizes temperature and humidity control through equipment in the air conditioning cabinet. The heating system 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 meter; the humidification system adopts a steam boiler electric heating and humidification method, which is controlled by a non-contact point periodic pulse width SSR. The temperature transducer monitors the temperature trend, and the air supply method is the upper air supply and the lower air return to ensure the uniform temperature and humidity of the studio. The control system integrates safety protection and interlocking devices to ensure the stable 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 double-decked silicone rubber is well sealed.
4. Start the device through the operation panel and set the required temperature and humidity parameters (Temperature range -30~ 150 ℃, Humidity Control Range 30~ 98% R. H).
5. Start the circulating fan, and activate the heating and humidification system after the system automatically checks the interlock device.
6. Monitor temperature and humidity fluctuations and uniformity to ensure compliance (Temperature Fluctuation ≤ +/- 0.5 ° C, Temperature Uniformity ≤ +/- 2 ° C, Humidity Fluctuation +/- 2% R.H, Humidity Uniformity + 2% -3% R.H).
7. After the test is completed, stop the device through the operation panel and remove the test sample.
Notice
• Power frequency check meets AC380V requirements before use.
• Make sure the door is well sealed to prevent temperature and humidity leakage.
• Pay attention to safety protection measures during operation, such as whether the protection functions such as phase loss and overheating are normal.
• When the circulating fan is not started or overloaded, the heating and humidification system cannot be started, so it is necessary to troubleshoot first.
• The humidification system is equipped with a water level control and anti-dry burning device, and the water level is regularly checked to avoid dry burning.
• Test hole stoppers need to be installed correctly to maintain thermal insulation performance.
• Use the observation window heating wire and lighting only when needed, and avoid opening it for a long time.
Do not open the door frequently during the operation of the equipment, so as not to affect the temperature and humidity stability.
• Maintain control systems and Sensors regularly to ensure accuracy and reliability.
