Overview
HZAOC GDJW-225C high and low temperature alternating test chamber is a device suitable for storing, transporting and using adaptability test of electrical, electronic products, components, parts and materials in high and low temperature environment, while supporting temperature gradual change test and electronic components stress screening test. The box adopts an overall structure, the inner side is stainless steel plate, the outer side is sprayed Cold rolled steel plate, the thermal insulation material is ultra-fine Glass thermal insulation cotton, equipped with observation window and test hole.
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 adopts double-decked silicone rubber sealing material, the observation window is multi-layer conductive film tempered hollow Glass, built-in heating wire frost-proof and lighting.
3. The side of the box is equipped with φ 50mm test hole, and the stopper is silicone rubber low foam material, which has both high and low temperature resistance and thermal insulation efficiency.
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, and supports full Chinese menu operation.
6. The control mode is continuous PID control, setting programs 120 groups, each group up to 99 steps, can be connected to the loop.
7. Equipped with a variety of safety protection functions, including phase loss protection, over-temperature protection, power-off protection, etc.
8. Linear dispersion of multiple processes can be stored in advance, which is convenient to call and does not require repeability settings.
Principle
The test chamber is controlled by the evaporator, electric heater and fan in the air-conditioning cabinet, and the temperature is controlled by 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, and the temperature is monitored and adjusted in real time to ensure the accuracy and stability of high and low temperature environment simulation.
Applications
Electrical, electronic products, components, parts and materials of high and low temperature environmental adaptability test, temperature gradual change test, stress screening test
Steps
1. Turn on the power and lighting operation buttons.
2. Select the operation mode (fixed value or program operation) on the LCD Touchscreen controller.
3. Set temperature parameters, including Temperature range, heating rate, cooling rate, etc.
4. Call or write program names, set program groups and steps.
5. Start the circulating fan to ensure that the safety interlock device is functioning properly.
6. Start the test and monitor and display data in real time, such as temperature, running time, etc.
7. After the test is completed, power off the equipment.
Notice
• Power frequency is 380V +/- 10% to avoid voltage instability affecting equipment operation.
Before starting the refrigeration unit and heating system, check whether the circulating fan is started normally to prevent the interlock device from being disabled.
• Regularly check the safety protection system, such as over-temperature protector, high voltage control, etc., to ensure the safety of the equipment.
• When using the test hole, make sure the stopper sealing is good to prevent temperature leakage.
• When a fault occurs, find the cause according to the fault number displayed by the controller and deal with it in time.
• When the equipment is running, avoid opening and closing the door frequently to maintain temperature stability.
• Disconnect the power supply during maintenance to prevent the risk of electric shock.
