Overview
HZAOC GDJW-50B high and low temperature alternating test chamber is suitable for 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 of electronic components.
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 made of ultra-fine Glass thermal insulation cotton.
2. The door sealing is made of double-decked silicone rubber sealing material, the observation window is a multi-layer conductive film tempered hollow Glass, and the built-in special heating wire is 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, 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 power failure recovery setting function, real-time display of operating data, support for program name writing and fault number display.
8. It is equipped with a variety of safety protection measures, including phase loss protection, over-temperature protection, leakage protection, etc., and is equipped with an independent over-temperature protector.
9. The electrical control system is equipped with an interlock device to ensure that the cooling and heating system cannot operate when the fan is not started or overloaded.
Principle
The test chamber circulates the air in the upper air supply and lower air return mode through the evaporator, electric heater and fan in the air conditioning cabinet, and the temperature transducer is placed in the trend to monitor the temperature. The heating system is realized by the nickel-chrome wire electric heater of the porcelain frame, and the PID signal is controlled by the solid state relay; the refrigeration system adopts the shunt method to adjust the cooling capacity to ensure that the temperature is accurately controlled within the range of -30~ 150 ° C. The control system adopts the continuous PID control mode, which supports programmed operation and real-time monitoring to realize the simulation of high and low temperature alternating environment.
Applications
Electrical, electronic products, components, parts and materials of high and low temperature environmental adaptability test, temperature gradual change test, stress screening test
Steps
Connect the power supply and check whether the voltage meets the 380V +/- 10% requirement.
2. Select the operation mode (fixed value or program operation) on the LCD Touchscreen of the controller.
3. Set temperature parameters, including Temperature range, heating rate 1.0~ 3.0 ℃/min, cooling rate 0.7~ 1.0 ℃/min.
4. If you use a program to run, call or write a program group, each group can be set to a maximum of 99 steps, and loops can be connected.
5. Set the Timer Range from 0 to 999h, and select the power-off recovery mode (program termination or continuous operation from breakpoint).
6. Start the device and observe the real-time display data, including temperature, running time, etc.
7. After the test is completed, turn off the device and disconnect the power supply.
Notice
• Power frequency should be checked within 380V +/- 10% before operation to avoid voltage instability affecting performance.
• Ensure that the circulating fan starts normally, otherwise the refrigeration unit and heating system will not operate.
When setting up the program, pay attention to the program steps and the number of cycles to avoid exceeding the program limit.
• When a fault occurs, find the cause and deal with it in time according to the fault number displayed by the controller.
• Regularly check safety protection devices, such as over-temperature protectors, phase loss protection, etc., to ensure their reliable operation.
• The total power of the equipment is 3~ 13.5KW, and the corresponding power capacity needs to be matched when using it to prevent overload.
• The observation window may frost at low temperatures, and the built-in heating wire can prevent frost, but it is still necessary to pay attention to cleaning and maintenance.
• The test hole stopper is made of silicone rubber material, which should be properly stored after use to prevent damage from affecting the thermal insulation effect.
