Testing Limited

Following samples are forbidden to test and store:
01.Corrosive substances samples
02.Biological samples
03.Strong electromagnetic emission source specimens samples
04.Radioactive materials samples
05.High toxic substances specimen samples
06.Samples may occur toxic substances during the test

Volume and Dimension

225L

Internal Testing Room

W750×H600×D500 mm is the internal testing space size;

Outer Fully Dimension

W1450×H1750×D1100mm is the outer fully machine size

Test Condition

01. Environmental temperature: +5℃~+35℃
02. Relative humidity/RH≤85%
03. Circulating cooling water temperature≤+30℃(No ice),Circulating cooling water supply pressure is 0.32 MPa~0.45MPa

Temperature Range

-40℃~+150℃

Test Method:

01. No samples in cabinet(unless state in advance)
02. GB/T5170.2-2008   temperature test equipment
03. GB/T5170.5-2008   humidity and thermal test equipment

Temperature Fluctuation

≤0.5℃ (Note: if measured with GB/T5170.2-1996 fluctuation ≤±0.25℃)

Temperature Deviation

Better than ±1.5℃

Temperature Uniformity

01. ≤2℃
02. ≤1℃(temperature≤70℃,humidity≥90%RH)
03. ≤1℃(temperature >70℃,humidity≥80%RH)

Maximum Rate of Temperature Change

Mechanical refrigeration, standard load, -45 ~ + 125 ℃, linear, every 5min average error is less than 10%.

Standard Load

15kg Aluminium and no heat

Temperature Range

20%RH~98%RH (control range is refer to following picture)  

Relative Humidity Deviation

01. ±1.0%RH(humidity > 75%RH)
02. ±2.0%RH(humidity ≤75%RH)

Noise

A sound/voice level≤70dB(A); (The distance is 1 metre to the door and the height is 1.2m to the ground, freely space)

Meet test Methods

01.GB/T2423.1-2008(IEC60068-2-1:2007) Low temperature test method
02.GB/T2423.2-2008(IEC60068-2-2:2007) High temperature test method
03.GJB150.3-1986 High temperature test
04.GJB150.4-1986 Low temperature test
05.GB/T2423.3-2006(IEC60068-2-78:2007)
06.GJB1032-90

Insulation Structure

01. Wall: two-sided galvanized steel, surface with spray treatment (ESPEC standard color)
02. External structure reinforcement: double-sided galvanized steel, surface is spraying or Q235 steel with surface acid, phosphate and surface spray
03. The inner wall: SUS304 stainless steel plate
04. Internal structure reinforcement: SUS304 stainless steel
05. Heat insulating material: the rigid polyurethane foam and glass fiber 
06. Chamber bottom load capacity: 100kg / m2 (uniform load)
07. However, the overall box bearing weight (bottom and sample holder) does not exceed: 120kg

Air Conditioning Access

Fans, heaters, evaporators, drainage device, humidifier, dry preventer, wet bulb temperature sensor, wet sink

Test Cabinet Standard Configuration

01. Fairlead: two fairlead withφ100mm diameter on each side cabinet, located at the center of side wall
02. Preparation activities sample holder 2 layer, load-bearing capacity (uniformly distributed): 40kg / layer
03. Pressure balancing device

Door

01. Hinged doors, hinges on the left box (when facing the front of the box)
02. A glass observation window (W380 × H570mm)
03. On the door (automatic adjustment) can be anti-frost, anti-condensation hollow Preparation electric door (automatic adjustment) anti frost, condensation device.
04. Equipment inside the door lights (LED light efficiency and longevity)

Control Panel

The controller display ; Buttons, over-temperature protection device ; USB interface;

Mechanical Room

The machine room comprises: Refrigeration units, drain devices, fans, power distribution control cabinet, Humidification and water measuring humidity control device

Distribution Control Cabinet

Cooling fan ; Buzzer ; Distribution boards ; RS-485, RJ-45 Ethernet physical interface (equipped with  monitoring software together) ; Main Power Circuit Breaker;

Heater

Nickel-chromium alloy heating wire heater ; Heater control: non-contact and other periodic pulse width modulation, SSR (solid state relay);

Humidifier

01. Basin heated humidification method
02. Stainless steel sheathed heater control method: non-contact and other periodic pulse width modulation, SSR (solid state relay)
03. Water level control devices, anti-dry heater unit

Work Method

Mechanical compression binary cascade refrigeration mode

Condensation Method

Water-cooled (equipped with the cooling water flow device automatically can be adjustable)

Refrigeration Compressors

Mechanical compressor

Evaporator

Finned heat exchanger

Throttling Device

Electronic expansion valve

Evaporative Condensers

Brazed plate heat exchanger

Chiller Control ways

01. Control system automatically adjusts the refrigerator to run the best energy-saving operating mode based on test conditions
02. Return air compressor cooling circuit
03. Energy regulation loop
04. Evaporation pressure regulating valve

Figures Refrigeration System Conditions

Refrigeration system controller digital display high and low pressure, exhaust temperature and compressor operating current

Refrigerant

R404a / R23 (Ozone depletion indices are zero)

Others

The main components are international brand products; Cooling water filters (user-site installation)

Fairlead:

The diameter of the fairlead is φ50 or φ100,users can customize the position and quantity of it as long as it will not affect the equipment performance.

Monitoring Software:

For remote monitor and equipped with RAS-2003 software and one RS-485/RS-232 converter.

Software Working Condition:

Compatible PC IBM with PⅡ CPU and 128M ROM.