Overview
HZAOC GDJW-50E high and low temperature alternating test chamber is a device for storing, transporting and using adaptability test of electrical, electronic products, components, parts and materials in high and low temperature environment. It supports temperature gradual change test and electronic component stress screening test. Temperature range -70~ 150 ℃, High Accuracy Temperature Control and Various Safety Protection Functions.
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 is made of double-decked silicone rubber sealing material, and the observation window is made of multi-layer conductive film tempered hollow Glass, with built-in heating wire anti-frost 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 heating system uses a porcelain frame nickel-chromium 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 running mode supports fixed value and program operation. The control mode is continuous PID control, and 120 sets of programs can be set, with a maximum of 99 steps per set.
7. Equipped with a variety of safety protection measures, including phase loss protection, over-temperature protection, power-off protection, etc., to ensure the safe operation of the equipment.
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 mode is upper air supply and lower air return to ensure uniform temperature distribution. The control system realizes accurate temperature control through continuous PID control and solid-state relay zero-crossing triggering, and has program operation and real-time monitoring functions.
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. Turn on the power supply and check whether the Power frequency meets the requirements of 380V +/- 10%.
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, cooling rate, etc.
4. If you need the program to run, call or write a program group, set the steps and the number of cycles.
5. Start the device and monitor real-time display data, including temperature, running time, etc.
6. After the test is completed, stop the device according to the program and disconnect the power supply.
Notice
• Power frequency should be stabilized at 380V +/- 10% before operation.
• When the circulating fan is not started or overloaded, the refrigeration unit and heating system cannot be started.
• When a fault occurs, check the fault number displayed on the controller LCD and deal with it in time.
• Regularly check safety protection devices, such as over-temperature protectors, high voltage controls, etc.
The total power of the equipment is 3 to 13.5KW, and it is necessary to ensure that the power supply line meets the requirements.
• The built-in heating wire in the observation window needs to be kept working normally to prevent low temperature frosting.
• The test hole stopper needs to be well sealed to avoid affecting the thermal insulation efficiency.
