Overview
HZAOC GDJW-150C high and low temperature alternating test chamber is suitable for the adaptability test of electrical, electronic products, components, parts and materials in high and low temperature environment storage, transportation and use, as well as temperature gradual change test, and stress screening test for electronic components. 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 spray, and the thermal insulation material is ultra-fine Glass thermal insulation cotton.
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, and the observation window is a multi-layer conductive film tempered hollow Glass, the size is 200 × 300mm, and the built-in special heating wire is anti-frosting 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 control system adopts LCD Touchscreen temperature and humidity controller and Schneider electrical components, supports full Chinese menu operation, and displays a resolution of 0.01 ° C.
6. The operation mode includes setting value and program operation, the control mode is continuous PID control, the setting program 120 groups, each group up to 99 steps, can be connected to the loop.
7. With a variety of safety protection measures, such as phase loss protection, over-temperature protection, power-off protection, etc., and an independent over-temperature protector.
8. Support power-off recovery settings, display operating data in real time, and display the fault number when faulty, making it convenient to find the cause.
Principle
The test chamber realizes temperature control through evaporators, electric heaters, fans and other equipment in the air-conditioning cabinet, and circulates air in the upper air supply and lower air return mode. The heating system uses a porcelain frame nickel-chrome wire electric heater, and the instrument outputs a controllable pulse duty cycle PID signal controlled by a solid-state relay; the refrigeration system uses a shunt method to adjust the cooling capacity. The temperature transducer is placed in a trend, monitors and feeds back the temperature data, and the control system precisely adjusts the temperature through a continuous PID algorithm to realize high and low temperature alternating environment simulation.
Applications
Electrical and electronic products, components, parts and materials storage, transportation and use adaptability test, temperature gradual change test, electronic components stress screening test
Steps
1. Turn on the power supply and check whether the voltage meets 380V +/- 10%.
2. Select the operation mode (set value or program operation) on the controller, and set the temperature parameters and program steps.
3. Start the circulating fan to ensure that the refrigeration unit and heating system are started after normal operation.
4. Monitor and display data in real time, including temperature, running time, etc., to ensure that the test is carried out according to the settings.
5. After the test is completed, press the controller to stop the device and disconnect the power supply.
Notice
• Power frequency should be checked within 380V +/- 10% before operation.
• When the circulating fan is not started or overloaded, it is forbidden to start the refrigeration unit and heating system.
• Regularly check safety protection devices, such as over-temperature protectors, high voltage controls, etc., to ensure normal function.
• Avoid long-term operation under extreme conditions of high or low temperature to prevent equipment overload.
• Pay attention to the window lighting and heating wire status during operation to prevent frost from affecting the line of sight.
• When a fault occurs, find the cause and deal with it in time according to the fault number displayed by the controller.
• When maintaining equipment, disconnect the power supply first to avoid the risk of electric shock.
