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The products are suitable for the adaptability test of electrician, electronic products, components, parts and their materials in high and low temperature storage, transportation and use, as well as temperature gradient test.It can also conduct stress screening tests on electronic components.

Product specification (unit: mm)

1. Model LM80-40 cp - SD

Technical parameters

1. Temperature range: -20℃ ~ 150℃ (A)

2. Temperature uniformity: ≤±2℃ (no load)

3. Temperature fluctuation degree: ≤±0.5℃ (no load)

4. Cooling rate: 0.7 ~ 1.0℃/min

5. Heating rate: 1.0 ~ 3.0℃/min

6. Time setting range: 0 ~ 999 (H, M, S)

7. Power supply voltage: 380V±10%

8. Total power of the equipment: 3KW ~ 13.5kw

Enclosure structure

1. The box body adopts the overall structure.

2. The inner side of the box is made of 1.0mmsus304b stainless steel plate, while the outer side is made of 1.0mm cold-rolled steel plate sprayed with plastic, and the insulation material is made of ultra-fine glass insulation cotton.

3. Double layer silicone rubber sealing material is adopted for gate sealing.

4. The observation window is made of toughened insulating glass with multi-layer conductive film, and the size is 200×300mm. In order to prevent frosting in the glass at low temperature, a special built-in heating wire surround is specially designed, and a light is provided to provide illumination for observation.

5. In the side of the box with a plug with 50mm test hole, plug material for silicone rubber low foam, can withstand high and low temperature, with heat preservation efficiency.

6. An air conditioning cabinet is set at the back of the box office, in which evaporator, electric heater, fan, fan volute and other equipment are installed.

7. The temperature sensor is placed in the outlet.

6. The air supply mode in the test box is upper air supply and lower air return mode.

Heating and cooling system

1. The heater adopts nickel-chromium wire electric heater with porcelain frame, which has small thermal inertia and long service life.By the instrument output controllable pulse duty ratio PID signal, through the solid state relay to control, control smooth, reliable.

2. French "taikang" fully enclosed compressor unit is adopted for cryogenic refrigeration.Other refrigeration components, such as RANCO, SPORLAN, ALFALAVAL, DANFOSS, CASTEL, Japan and other imported brands.Use R404A environmental friendly refrigerant.

3. In order to ensure the safe operation of the system, it is necessary to set high voltage control, overpressure, overload and other protection systems in the system.Meanwhile, in order to monitor the operation of the system, a high pressure meter is set up at the high pressure end to monitor the operation of the system.

Control system

1. Temperature controller: it adopts high-precision touch screen temperature controller, which can control accurately, smoothly and without drift in long-term operation.

2. Sensor: PT100 temperature sensor.

3. The control of heating output adopts solid-state relay zero-crossing trigger to reduce noise, reduce pollution, facilitate maintenance and improve control accuracy.

4. Safety protection measures shall be set up in the control system, including: phase loss protection, phase sequence error protection, phase voltage unbalance protection, fan overload protection, overtemperature power cut protection, leakage protection, etc.

5. The control system is equipped with convenient operation panel, which is located at the upper left part of the test box, and is equipped with power supply, lighting, operation keys of various functions and failure indicator lights.

6. In addition to the main controller, an independent overtemperature protector is also set in the system. Even if the main controller fails, the overtemperature protector can reliably disconnect the heating power to protect the safety of equipment and test products.

7. There is an interlock device in the electrical control system. When the circulating fan is not started or overloaded, the refrigeration unit and heating system cannot be started.

Execution standard

1. GB/T2423.1-2001;

2. GB/T2423.2-2001;

3. GB/T10592-2008;

4 GB/T10589-1989;

5. GB/T11158-1989;

6. IEC68-2-1;

7. IEC68-2-2;

Equipment operating environment

1. Ambient temperature: 5℃ ~ +28℃ (the average temperature within 24 hours ≤28℃);

2. Ambient humidity: ≤85%;

3. Power requirements: AC380 (±10%) V/50HZ three-phase four-wire system;

4. The operating environment should be below 28 degrees at room temperature and well ventilated;

5. No objects can be placed at 80cm before and after the machine is placed;