Overview
HZAOC GDJS-50B 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 storage, transportation and use adaptability tests 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 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, PT100 Temperature Sensor, Solid State Relay Zero Crossing Trigger 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 arranged in the upper left part of the test chamber, and is equipped with power supply, lighting and various function operation buttons and fault indicator lights.
12. The independent over-temperature protector reliably disconnects the heating power supply in the event of a main controller failure.
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 achieves temperature and humidity control through equipment in the air conditioning cabinet, including evaporators, electric heaters, humidifiers and fans. The temperature transducer monitors the trend temperature, and the control system adjusts the solid state relay through the PID algorithm to control the heating and humidification output to ensure stable temperature and humidity. The air supply method is the upper air supply and the lower air return to evenly distribute the environmental conditions.
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. Set the temperature and humidity parameters through the operation panel, Temperature range -30~ 150 ℃, Humidity Control Range 30~ 98% R.H.
5. Start-up control system, including circulating fan, heating and humidification system.
6. Monitor Temperature and Humidity Fluctuations and Uniformity to ensure compliance.
7. After the test is completed, shut down the system and remove the sample.
Notice
• Power frequency is AC380V to avoid voltage mismatch.
• Check whether the safety protection device, such as phase loss protection, over-temperature protection, etc. are normal before operation.
• When the circulating fan is not started or overloaded, the heating and humidification system cannot be started, so the fan problem needs to be solved first.
• Avoid dry burning of the heater and pay attention to the status of the water level control device.
• Do not open the door frequently during the test to prevent temperature and humidity fluctuations.
• Regularly clean the observation window and test hole to ensure proper function.
• Disconnect the power supply during maintenance to prevent the risk of electric shock.
