From +20~-40°C, about 40min

From +20-100°C, about 30min

Structure:

The integral structure, that is, the test chamber, the refrigeration system, the heating, the temperature regulation system, the electrical control cabinet and the refrigeration unit are a whole, the refrigeration unit is located at the bottom of the box, and the electrical control part is placed on the side of the test chamber for easy operation

Box:

a) In the air duct interlayer at one end of the studio, distributed heating, refrigeration evaporators, blower motors, fan blades and other devices;

b) There is 1 cable threading hole on the side of the test chamber, and the size is ф50mm;

c) The test chamber studio is made of 1mm thick SUS304 stainless steel plate, and the box shell is made of 1mm thick high-quality stainless steel

d) The insulation material is made of polyurethane foam, with a thickness of 100mm, the insulation effect is good, and the outer surface of the test chamber does not frost or condensation.

e) The studio is equipped with 1 layer of height-adjustable stainless steel shelves;

f) The box is equipped with a condensate drain

Observation & Lighting Fixtures:

A multi-layer insulating glass observation window is installed on the door, with a size of about 300×275mm, and is equipped with a heating and anti-frost device. A (AC12V) 20W halogen lamp is installed on the door of the test chamber.

The control system consists of:

1. Temperature measurement: Pt100 platinum resistance;

2. Control device: programmable temperature controller VISO6071/TEMI880 random. It can display the working status of set parameters, time, heater, etc., and has the function of automatic operation of test and self-tuning of PID parameters. 

3. Only the temperature needs to be set to realize the automatic operation function of the refrigerator. The control system uses an intelligent control software system, which has the working conditions of automatic combination of refrigeration, heating and other subsystems, so as to ensure high-precision control in the entire temperature range and achieve the purpose of energy saving and consumption reduction. The perfect detection device can automatically carry out detailed fault display and alarm, such as when the test chamber is abnormal, the controller automatically displays the fault status.  

4. Screen display: set temperature; measured temperature; Heating time, temperature curve and other working statuses as well as various alarm indications.

5. Setting accuracy: temperature: 0.1°C   

6. Program capacity: 100, the total number of program sections is 1000 paragraphs, and the maximum time of a single step of the program: 99 hours and 59 minutes; Programs can be looped, and programs can be linked to each other; 

7. Operation mode: constant operation, program operation;

8. Other major low-voltage electrical components are well-known brand products: such as Schneider AC contactor, thermal overload relay, OMRON small intermediate relay, Delixi circuit breaker, etc.

1. Over-temperature protection of the studio;

2. Heater short-circuit protection;

3. Fan overload protection;

4. Compressor overpressure protection;

5. Compressor overload protection;

6. Leakage protection;

7. Safe and reliable grounding device;