1、 Product specifications:
Model GDJW-225 Internal dimensions D × W × H 500 × 600 × 750: mm

2、 Technical parameters:
1. Temperature range: 0 ℃~150 ℃, -20 ℃~150 ℃, -40 ℃~150 ℃, -60 ℃~150 ℃, -70 ℃~150 ℃
2. Temperature fluctuation: ≤± 0.5 ℃
3. Temperature uniformity: ≤ 2 ℃
4. Temperature deviation: ≤± 1.5 ℃
5. Heating rate: 1.0-3.0 ℃/min
6. Cooling rate: 0.7-1.2 ℃/min
7. Time setting range: 0-9999 hours
8. Power requirements: AC380 (± 10%) V/50HZ three-phase five wire system

3、 Box material:
1. The shell is processed and formed using high-quality A3 steel plate CNC machine tools, and the surface of the shell is treated with anti-static spray coating, making it more smooth and beautiful;
2. The inner liner is made of high-quality SUS304 mirror stainless steel plate;
3. High density glass fiber cotton is selected as the insulation material, with a thickness of 100mm for the insulation layer;
4. The temperature circulation system adopts a specially designed low-noise long axis fan motor with stainless steel multi blade impellers that are resistant to high and low temperatures, to achieve strong convection and vertical diffusion circulation;
5. A double-layer high-temperature resistant high tensile sealing strip is used between the door and the box to ensure the sealing of the testing area;
6. Adopting non reactive door handles makes operation easier;
7. The bottom of the machine adopts high-quality fixed PU movable wheels;
8. The observation window adopts multi-layer insulated tempered glass, and the inner side is coated with laminated conductive film for heating and defrosting (clearly observe the test process);
9. The test hole (on the left side of the machine) can be used for external testing power or signal lines (the aperture or number of holes needs to be increased and indicated);

4、 Control system:
1. Adopting the Korean imported "SP790" LCD display control instrument, microcomputer P.I.D controls S.S.R output operation, and can set the number of cycles;
2. Accuracy: 0.1 ℃ (display range);
3. Resolution: ± 0.1 ℃;
4. Temperature sensor: PT100 platinum resistance thermometer;
5. Control method: Thermal balance temperature regulation method, all electrical appliances adopt Schneider series products;
6. The temperature control adopts the P.I.D+S.S.R system for coordinated control in the same channel, with automatic calculation function, which can immediately correct the temperature change conditions, making the temperature control more accurate and stable;
After inputting the data and experimental conditions, the controller has a screen lock function to avoid manual touch and shutdown;
8. The return air outlet of this test chamber is equipped with an automatic defrosting device

5、 Heating system:
1. Adopting far-infrared nickel alloy high-speed heating electric heater;
2. The high-temperature system is completely independent and does not affect the low-temperature test and alternating test;
3. The temperature control output power is calculated by a microcomputer to achieve high-precision and high-efficiency electricity efficiency;

6、 Refrigeration system:
1. Compressor: Fully enclosed original French Taikang unit;
2. Cooling method: single (double) mechanism cooling (air-cooled type);
3. Condensation method: forced air cooling;
4. Refrigerants: R404A, R23 (environmentally friendly);
5. All system pipelines undergo a 48 hour leak detection test with ventilation and pressurization;
6. The heating and cooling systems are completely independent;
7. Internal spiral refrigerant copper tube;
8. Slope evaporator;
9. The dry filter, refrigerant flow window, repair valve, oil separator, solenoid valve, and storage tank are all imported original parts;

7、 Protection system:
1. Fan overheating protection;
2. Overall equipment under phase/reverse phase protection;
3. Overload protection for refrigeration system;
4. Refrigeration system overpressure protection;
5. Overall equipment timing;
6. Overcurrent protection;
7. Other protections include leakage, operation indication, automatic shutdown after fault alarm, etc;

8、 Equipment usage conditions:
1. Environmental temperature: 5 ℃ to+28 ℃ (average temperature within 24 hours ≤ 28 ℃)
2. Environmental humidity: ≤ 85% R.H
3. The operating environment requires good indoor ventilation, and no objects should be placed 80 centimeters in front, back, left, right, or right of the machine;

9、 Compliant with standards: Designed and manufactured strictly in accordance with relevant standards such as GB/T10592-2008, GB/T2423.1-2008, GB/T2423.2-2008, GB/T2423.4-2008, etc;

10、 Service commitment: Free home delivery. After the installation and debugging of the equipment is completed, relevant technical personnel will receive free operation training at the user's site, with no limit on the number of people.