Overview
HZAOC GDJW-225C low/high temperature 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.
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 is made of double-decked silicone rubber sealing material.
3. The observation window is a multi-layer conductive film tempered hollow Glass, the size is 200 × 300mm, and the built-in special heating wire is frost-proof and lighting.
4. 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.
5. There is an air conditioning cabinet at the back of the studio, and equipment such as evaporators, electric heating devices, humidifiers, and fans are installed.
6. The temperature sensor is placed in a trend, and the air supply method is the upper air supply and the lower air return.
7. The heating device adopts porcelain frame nickel-chromium wire electric heating device, which has small thermal inertia, long life and stable and reliable control.
8. Low temperature refrigeration adopts French "Taikang" fully enclosed Compressor unit, Miscellaneous refrigeration parts are imported brands, and R404A environmentally friendly refrigerant is used.
9. Control system with high voltage control, overvoltage, overload and other protection systems, high voltage terminal with high voltage meter monitoring.
10. The temperature controller adopts High Accuracy Digital Temperature Controller, which controls accurately and smoothly and does not drift for a long time.
11. Sensor for PT100 Temperature Sensor, heating output using solid state relay zero trigger, reduce noise, improve accuracy.
12. Safety protection measures include phase loss protection, phase sequence error protection, over-temperature protection, leakage protection, etc.
13. The operation panel is located on the upper left, and is equipped with power, lighting, and various function operation buttons, as well as fault indicator lights.
14. With an independent over-temperature protector, the heating power is reliably disconnected when the main controller fails.
15. Control system is equipped with an interlock device to ensure that the cooling and heating system can not start when the fan is not started or overloaded.
Principle
The low/high temperature test Chamber achieves temperature control through the heating system and the refrigeration system. The heating device adopts a porcelain frame nickel-chrome wire electric heating device, which is controlled by a solid-state relay by outputting a controllable pulse duty cycle PID signal from the meter; the low temperature refrigeration adopts a French "Taikang" fully enclosed Compressor unit, with imported refrigeration components and R404A environmentally friendly refrigerant. The temperature sensor monitors the trend temperature, and the Control system adjusts the heating and cooling according to the set value. The air supply method is upper air supply and lower air return to ensure Temperature uniformity and Stability.
Applications
Electrical, electronic products, components, parts and materials of high and low temperature environmental adaptability test, temperature gradual change test, stress screening test
Standards
GB/T2423.1-2001、GB/T2423.2-2001、GB/T10592-2008、GB/T10589-1989、GB/T11158-1989、IEC68-2-1、IEC68-2-2
Steps
Connect the power supply to ensure that the voltage is AC380V +/- 10%, three-phase five-wire system.
2. Check the water source and use deionized water or purified water.
3. Turn on the power switch and start the Control system.
4. Temperature range, heating rate, cooling rate and timing time are set through the operation panel.
5. Start the circulating fan to ensure normal operation.
6. Start the heating or cooling system as needed.
7. Monitor temperature fluctuations and uniformity to ensure compliance with requirements.
8. After the test is completed, turn off the heating and cooling system and stop the fan.
9. Disconnect the power supply and clean the equipment.
Notice
• Ambient Temperature should be maintained at 5~ 28 ℃, Humidity ≤ 85% R.H.
• Power supply voltage must be AC380V +/- 10%, three-phase five-wire system to avoid voltage instability.
• Use deionized water or purified water as a water source to prevent impurities from affecting the equipment.
• Check whether the fan is normal before starting to avoid starting the cooling or heating system when the fan is overloaded.
• Regularly check the protection system, such as high voltage control, overvoltage, overload protection, to ensure safe operation.
• The heating wire and lighting lamp of the observation window need to be maintained regularly to prevent frost from affecting the observation.
• The test hole stopper should be kept intact to ensure thermal insulation efficiency.
• Avoid frequent switching during equipment operation to prolong service life.
• In the event of a malfunction, check the fault indicator immediately and take appropriate measures.
