Overview
HZAOC GDJW-800D 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 can also conduct stress screening test on 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 sprayed, and the thermal insulation material is ultra-fine Glass thermal insulation cotton.
Features
1. The box adopts the overall structure, the inner SUS304B stainless steel plate, the outer Cold rolled steel plate is 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 with built-in heating wire to prevent frost 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, and supports full Chinese menu operation.
6. The control mode is continuous PID control, the operation mode includes setting value and program operation, and the setting program is 120 groups, each group is 99 steps.
7. It has a variety of safety protection functions, such as phase loss protection, over-temperature protection, leakage protection, etc., and is equipped with an independent over-temperature protector.
8. Display operating data in real time, including temperature, time, heating status, etc., and display the fault number in case of failure for easy troubleshooting.
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 air supply mode is the upper air supply and the lower air return, and the temperature transducer is placed in a trend to ensure temperature uniformity and stability. The control system adopts a continuous PID control mode to support program operation and fixed-value operation to achieve accurate temperature change and maintenance.
Applications
Electrical and electronic products, components, parts and materials adaptability test, 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.
3. Set temperature parameters, including Temperature range (-60~ 150 ℃), heating rate (1.0~ 3.0 ℃/min) and cooling rate (0.7~ 1.0 ℃/min).
4. If using a program to run, call or write a program group, set the steps and the number of cycles.
5. Start the device and observe the real-time display data to ensure normal operation.
6. After the test is completed, turn off the device and disconnect the power supply.
Notice
• Power frequency must be stable at 380V +/- 10% when the equipment is running.
• When the circulating fan is not started or overloaded, the refrigeration unit and heating system cannot be started.
• Regularly check safety protection devices, such as over-temperature protectors, high voltage controls, etc.
• Avoid frosting in the observation window in a low temperature environment and use the built-in heating wire function.
• When the fault occurs, find the cause according to the fault number displayed by the controller, and do not disassemble it yourself.
The total power of the equipment is 3 to 13.5KW to ensure that the power supply line meets the requirements.
• The test hole stopper needs to be kept intact to maintain the thermal insulation efficiency.
