Overview
HZAOC GDJW-250B 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 an overall structure, the inner side is stainless steel plate, the outer side is Cold rolled steel plate spray, 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, and the outer side is 1.0mm Cold rolled steel plate
2. The thermal insulation material adopts ultra-fine Glass thermal insulation cotton
3. Door sealing with double-decked silicone rubber sealing material
4. The observation window is a multi-layer conductive film tempered hollow Glass with built-in heating wire and lighting
5. The side of the box is equipped with φ 50mm test hole, and the stopper is silicone rubber low foam material
6. The heater adopts porcelain frame nickel-chrome wire electric heater, which has little thermal inertness and long service life
7. The control system adopts LCD Touchscreen temperature and humidity controller and Schneider electrical components
8. The controller has Chinese menu operation, display resolution 0.01 ℃
9. Support fixed value and program operation, the control mode is continuous PID control
10. 120 sets of programs, each set of programs has 99 steps, and loops can be connected
11. With power-off recovery setting function
12. Real-time display of running time, number of segments, remaining time and other data
13. Program names can be written for easy search
14. Display the fault number when the fault occurs, making it easy to find the cause
15. With a variety of alarm function options
16. Adopt solid state relay zero-crossing trigger to improve control accuracy
17. Safety measures are in place, including phase loss protection, over-temperature protection, etc
18. Linear dispersion of multiple processes can be stored in advance, easy to call
19. Equipped with an independent over-temperature protector
20. The electrical control system is equipped with an interlock device
Principle
The test chamber realizes temperature control through evaporators, electric heaters and fans in the air-conditioning cabinet. The heating system adopts a porcelain frame nickel-chrome wire electric heater, and the controllable pulse duty cycle PID signal output by the instrument is 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 air supply method is the upper air supply and the lower air return to ensure temperature uniformity and control accuracy.
Applications
Electrical, electronic products, components, parts and materials in high and low temperature environment storage, transportation and use adaptability test, temperature gradual change test, electronic components stress screening test
Steps
1. Set the temperature program through the controller or call the pre-stored process Linear dispersion
2. Select the operation mode (set value or program operation)
3. Set program parameters, including temperature range, time, number of cycles, etc
4. Start the equipment and monitor real-time operating data
5. Equipment automatically performs high and low temperature alternating test
6. Stop the equipment after the test is completed
Notice
• Power frequency 380V +/- 10%
• When the circulating fan is not started or overloaded, the refrigeration unit and heating system cannot be started
• Note that the total power of the equipment is 3~ 13.5KW to ensure the power supply capacity
• Check whether the safety protection device is normal before use
• Avoid opening and closing doors frequently while the equipment is running
• Regularly check sealing materials and insulation performance
• In case of failure, find the cause according to the fault number displayed by the controller
