Overview
HZAOC GDJS-010C 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, 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 back of the box studio is equipped with an air conditioning cabinet, and evaporators, electric heaters, humidifiers, fans and other equipment 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 pipe, 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 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. 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 adjusts the temperature and humidity in the working room through the evaporator, electric heater and humidifier in the air conditioning cabinet. The temperature control adopts PID signal to control the heater through solid state relay, and the humidification adopts the electric heating method of steam boiler. The temperature is monitored by PT100 Sensor, and the air supply system realizes the return air circulation under the upper air supply to ensure the 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, transportation adaptability test, use adaptability test
Standards
GB/T2423.3-2001、GB/T5170.5-96、GB/T10586-89
Steps
1. Turn on the power supply and check that the Power frequency is AC380V.
2. Start the control system through the operation panel and set the required temperature and humidity parameters.
3. Start the circulating fan to ensure normal operation.
4. Start the heating and humidification system as required.
5. Place the sample in the studio and close the door.
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, turn off the heating and humidification system, stop the fan, and disconnect the power supply.
Notice
• Power frequency meets the requirements before operation to avoid phase loss or phase sequence errors.
Before starting the heating and humidification system, it is necessary to confirm that the circulating fan has been started normally and is not overloaded.
• Regularly check the water level control device and anti-dry burning device to prevent the heater from dry burning.
• Avoid opening the door frequently during the test to maintain stable temperature and humidity.
• Pay attention to the fault indicator light, and immediately stop operation and check if there is any abnormality.
• Disconnect the power supply during maintenance to ensure safety.
• When using the test hole, ensure that the stopper sealing is good to prevent temperature and humidity leakage.
