1. Product Overview

1.1Name

High and low temperature test chamber

1.2Model

LJGDP-150G

1.3Scope of application

It is suitable for determining the adaptability of components, equipment or other products to use, transport and storage under the combined conditions of high and low temperature and temperature cycle changes. and equipment for evaluating use in high or low temperature environments. Widely used in military, aerospace, electronics, automotive, new energy, testing and other industries.

1.4meet the standard

GB/T2423.1-2001TestALow Temperature Test Method

GB/T2423.2-2001TestAHigh Temperature Test Method

GB/T11158-2008Technical conditions for high temperature test chamber

GB/T11158-2008  Technical conditions for low temperature test chamber

GB/T2423.2-2001TestBHigh Temperature Test Method

GJB150.4-2009  Low temperature test

GJB150.3-2009   High temperature test

GB/T5170.2-2008Temperature test equipment

Gb/t gb/t 2423.22-2008TestNb: Temperature change test

Gb/t gb/t 2423.22-2008TestNbAlternating damp heat test

2. Product use conditions and restrictions

2.1 site requirements

Appropriate maintenance space around the equipment (as shown above) A:≥60cm B:≥60cm C:≥ 100cm D:≥60cm

• The ground shall be flat, well ventilated and free of flammable, explosive, corrosive gas or dust;
• There is no strong electromagnetic radiation source nearby, and drainage floor drain is provided near the equipment;
• Ground bearing capacity of site: not less 500 kg/㎡。

2.2 environmental requirements

Temperature

5~40 ℃ (5~35 ℃ to ensure the best performance）

Humidity

≤ 90% RH

Air pressure

86～106kpa

2.3 User Power

Installed power

 4.5KW 

Grounding Requirements

• AC380V three-phase four-wire + protection ground wire
• Grounding resistance of protective earth wire is less 4Ω

Stability

• Allowable voltage fluctuation range: (1±10%）380V  
• Allowable fluctuation range of frequency: (1±1%）50Hz

The user needs to configure the air or power switch with corresponding capacity for the equipment at the installation site, and the switch must be independent and dedicated for the equipment.  

3. Product specifications 

3.1 internal volume

150L

3.2 internal dimensions

WDH ：500x500x600(mm）

3.3 dimensions

WDH ：750*1550*1700（mm）

4. Product technical parameters 

Test environmental conditions

Ambient temperature 5~35 ℃, relative humidity ≤ 85% RH test chamber without load (unless otherwise specified)

Test Method

GB/T5170.2-2008-Temperature test equipment

4.1 temperature range

-60 ℃ ~ 150 ℃

Remarks:

• Temperature and humidity performance test according to the standardQuasi IEC60068-3；
• Sensors placed in air handling

At the air outlet of the unit.

4.2 temperature uniformity

≤ ± 2 ℃

4.3 temperature fluctuation

≤ ± 0.3 ℃

4.4 temperature deviation

≤ ± 2 ℃

4.5 heating rate

≥3℃/min

4.6 cooling speed

≥1℃/min

5. Product System Configuration

System Overview

The main system consists of structure, refrigeration, heating and control.

5.1 structure and material

5.1.1 Box structure

   Integral split type, environmental chamber and refrigeration unit, control panel on the door.

5.1.2 Material composition

• Outer wall material: high quality steel plate, surface spray treatment

• Inner wall material:SUS304 stainless steel plate
• Thermal Insulation:100mm thick composite insulation material (glass wool polyurethane foam board)

5.1.3 Box structure 

Outer wall material: high quality steel plate, surface spray treatment;         

Appearance color: box for the lijia standard color;

Inner wall material: SUS304 stainless steel plate;

Thermal insulation material: composite thermal insulation material (glass woolpolyurethane foam board);

All openings have effective sealing methods; such as wool felt, Soft silicone plug , Silicone seal;

5.1.4 Adjustment channel

Fan, heater, evaporator, temperature sensor.

5.1.5 Internal airflow regulation

Section

Through the action of a high-power centrifugal fan, forced air circulation can achieve good temperature uniformity.

5.1.7 Control operation boundary

Face

Controller touch screen,USB interface, main power switch, over-temperature protection setting device, network interface, communication interface.

5.2 refrigeration system 

5.2.1 Refrigeration mode

Mechanical compressionDoubleStage refrigeration

5.2.2 Cooling mode

air-cooled

5.2.3 Refrigeration compressor

Adopt French Taikang fully enclosed compressor,

5.2.4 Control mode

With a cold end PID The regulation technology enables control to be achieved through the precise output of the compressor cooling capacity.The effect of temperature, cooling and maintaining the temperature below room temperature does not require the participation of a heater, the complete zone.Unlike the cold and heat balance temperature control method, that is, heating without cooling, cooling without heating, energy saving More than 40%.

5.2.5 Refrigerant

R404a

5.2.6 Condenser

air-cooled condenser

5.2.7 Evaporator

finned heat exchanger

5.2.8 Throttling device

Capillary

5.2.9 Refrigeration system allocation

⚫

Refrigeration compressor: France Taikang

Piece

⚫

Pressure controller : Danfoss, Denmark DANFOSS

• Solenoid valve: United States Poland SPORLAN'
• Filter:Danfoss, Denmark DANFOSS
• Refrigerant: United States DUPONT 

5.3 heating system 

5.3.1 Heating mode

Electric heater. Non-contact solid state relay control. The heater is evenly distributed behind the evaporator.

In the air duct.

5.4 control system 

5.4.1 Controller

7 inch 1024X768 dot matrix TFT color LCD monitor

5.4.2 Operation mode

Procedure mode and fixed value mode

5.4.3 Setting Method

Chinese menu, touch screen input

5.4.4 Program capacity

200 group program, each group consists of 200 segments, the maximum 4000 segments.

5.4.5 Setting range

Adjusted according to the temperature operating range of the device(Upper limit 5 ℃, lower limit -5 ℃)

5.4.6 Display resolution

Temperature 0.1 ℃, time 1s,

5.4.7 Input

Class A high precision armored platinum resistance;

5.4.8 Communication function

Built-in Ethernet interface and wirelessWiFi can be upgraded to connect multiple computers to monitor and transfer files on the server side, or connect multiple mobile phones to monitor wirelessly through the network..

5.4.9 Control mode

Intelligent hot and cold PID

5.4.10USB Function

Matching USB interface

5.4.11 Accessory Function

• Fault alarm and cause, processing prompt function
• Power-off protection function
• Upper and lower limit temperature protection function
• Calendar timing function(Automatic start and automatic stop operation)

• Booking function
• Self-diagnosis function
• Auto stop function

5.4.12 Other configurations

Power cable

Five-wire (four-core cableProtective grounding wire) 1 cable (5 m long)

5.4.14

Control System Accessories 

• Touch screen:LIKCTR
• Control module: Japan Omron
• Circuit Breakers, etc.: Switzerland ABB/Shneider
• AC contactor : Switzerland ABB/Shneider
• Intermediate relay : Switzerland ABB/Omron/Shneider
• Overtemperature protector: Italy DIXELL 

5.5 safety protection device 

5.5.1 Studio

• Freestanding studio overtemperature protector
• Fan overheat protection

5.5.2 Refrigeration system

• Compressor overpressure protection
• Compressor overcurrent protection
• Compressor overheat protection

5.5.3 Power supply system

• Power supply short circuit protection
• Overcurrent protection such as heater short circuit

5.5.4 Other

• Test box shell grounding protection