External Dimensions

W2200 × D400 × H1600 mm

Internal Dimensions

W2000 × D300 × H300 mm

Temperature Range

-40°C ~ +70°C, continuously adjustable

Temperature Fluctuation

±0.5°C (no load, steady state)

Temperature Uniformity

±2.0°C (no load, steady state)

Temperature Deviation

±2°C (no load, steady state)

Humidity Range

Automatically adjusted according to operating temperature; at 40°C, humidity can be precisely controlled up to 96%

Heating Rate

-40°C ~ +70°C approx. 1–1.5°C/min, non-linear, no load

Cooling Rate

+70°C ~ -40°C approx. 0.5–1°C/min, non-linear, no load

Gas

Methane, propane, isobutane, carbon monoxide, and other gases (supplied by customer)

Orientation Test

45° / 360° rotation; 8 positions

Noise

Tested according to GB/T14623-2008; noise ≤ 75 dB (measured at 1 m from the equipment door)

Power Supply / Power

AC 1-phase 220V 50Hz / 6.5 kW

1

Cabinet Material Composition

A. Outer wall material: 1.5 mm cold-rolled steel plate with high-grade baking finish coating;

B. Inner wall material: 1.0 mm SUS304 stainless steel plate;

C. Thermal insulation material: 50 mm rigid polyurethane foam insulation layer (silicon-free).

2

Structural Strength

A. Load-bearing capacity of the chamber bottom plate: ≤100 kg (uniformly distributed load);

B. The chamber adopts full welding process, ensuring continuous and dense weld seams, which improves welding strength and airtightness, meeting high reliability requirements.

3

Door

Single-swing hinged door (right handle, left hinge)

Mechanical side-mounted latch handle

Double silicone sealing gaskets and anti-condensation electric heating device in door frame

4

Observation Window

Multi-layer vacuum glass window with coated heating and anti-frost function installed on chamber door

5

Lighting

LED lighting installed above the observation window, controlled via touch-screen controller

6

Test Lead Port

Built-in (10A) explosion-proof power socket inside chamber (independent wiring for voltage regulation tests), reserved airflow/speed test port

7

Casters

Four sets of high-quality universal wheels with leveling feet

8

Electrical Cabinet

Installed at rear of chamber, equipped with power distribution panel; water-electricity separation design to ensure safety

9

Operation Time Counter

System operating time is continuously accumulated to provide equipment usage records

10

Emergency Stop / Start Button

Manual override control; immediately cuts off main power supply in emergency situations

1

Composition

Circulation motor, multi-blade centrifugal fan, heater, refrigeration evaporator, temperature and humidity sensors, etc.

2

Control Method

Forced air circulation with balanced temperature control

3

Air Circulation Device

Long-shaft circulation motor with multi-blade centrifugal fan

4

Heating Method

Steam heating with PID-controlled power output

5

Air Cooling Method

Finned evaporator, capillary tube with proportional refrigeration control

6

Air Supply Mode

Circular horizontal air supply system

1

Refrigeration Method

Single-stage mechanical refrigeration cycle

2

Refrigeration Section Position

Located at the lower part of the chamber

3

Compressor

Fully hermetic compressor

4

Refrigerant

Environmentally friendly (ODP = 0)

5

Condenser

Air-cooled finned condenser (also functions as heat exchanger)

6

Evaporator

High-efficiency multi-stage aluminum fin evaporator (thickened fins), also functions as dehumidifier

7

Dry Filter

8

Throttling Device

Capillary tube + proportional control

9

Dehumidification

Refrigeration-based dehumidification; air passes through evaporator below dew point temperature, moisture is condensed and removed

10

Control Method

A. System automatically controls compressor operation and cooling capacity according to test conditions to ensure optimal working status and extend service life; B. Designed with hot gas bypass energy-saving function and suction cooling bypass to protect compressor safety

11

Refrigeration Process

A. Compressor protection functions including automatic suction and discharge pressure protection to maintain normal operating temperature and extend service life; B. Refrigeration piping uses high-quality oxygen-free copper tubes with nitrogen-protected welding to prevent oxidation inside tubes; C. Suction and discharge pressures are monitored via sensors connected to control system, and discharge pressure is directly displayed via Danfoss pressure gauge; D. Stainless steel drip tray is installed under compressor to collect condensate and discharge it centrally from the rear bottom of the chamber

12

Vibration & Noise Reduction

Vibration: compressor mounted on damping springs or rubber pads to reduce vibration transmission to base frame; Noise reduction: sound barrier panels installed at air inlet and outlet to reduce noise transmission; low-speed high-airflow condenser fans are used to achieve low-noise operation

1

Heater

Finned heating element (surface temperature of heating tube controlled below 100°C)

2

Control Method  (Heating)

Controller reads analog signal from temperature sensor and outputs control signal via SSR solid-state relay, achieving high-precision non-contact switching control

3

Humidifier

Stainless steel armored humidifier (surface evaporation type); equipped with water shortage protection to prevent dry burning; low output load, large heat exchange area, long service life, and fast humidification

4

Control Method

(Humidification)

Controller reads analog signal from temperature sensor and outputs control signal via SSR solid-state relay for high-precision non-contact switching control

5

Sensor

Platinum resistance temperature and humidity sensor with high accuracy

6

Anemometer

Handheld anemometer

1

Controller

Equipped with a mainstream programmable logic controller; 7-inch full-color touchscreen human-machine interface (HMI) with bilingual Chinese/English display; menu-based operation for easy user control

2

HMI Functions

A. Real-time monitoring of controller data, signal status, and output status; B. During testing, real-time display of set temperature/humidity, measured temperature/humidity, heating and humidification output, running time, operation parameters, and PID parameters

3

Control Method

A. PID + SSR control mode with zone PID adjustment and automatic tuning function; B. At high temperature, PID automatically adjusts heating output; in humidity mode, PID automatically adjusts heating and humidification output; C. Compressor start/stop is automatically recognized by the controller without manual setting

4

Display Accuracy

Temperature: 0.1°C; Humidity: 0.1% RH; Time: 1 min

5

Operation Modes

Constant value operation, program operation

6

Program Capacity

120 groups of programs, 100 segments per program, 99.999 cycles; each segment up to 99.999 hours 59 minutes; freely configurable segmentation with multiple PID control groups

7

Communication Interface

USB interface for program upload/download, internal parameter import/export, and historical data export

8

USB Storage

Supports USB flash drive for downloading historical curves and data; hot-swappable function supported

9

Password Protection

Controller equipped with password protection function

10

Power Failure Protection

Supports power-off recovery with selectable modes: Stop / Cold start / Hot start

11

Power-on Scheduling

Programmable start time; system automatically starts operation after preset time once powered on

12

Electrical Components

Main electrical control components are high-quality branded parts; detailed list available in main material specification sheet

1

Refrigeration System

A. Compressor overpressure protection;
B. Compressor overcurrent protection.

2

Heating & Humidification System

A. Single-phase switch overload protection;
B. Heater dry-burning protection;
C. Humidifier dry-burning protection;
D. Humidification water tank low-water protection.

3

Power Supply

Molded case circuit breaker protection. 220V high-voltage system with explosion-proof plug; separation of strong and weak current; independent signal wiring.

1

Installation Site –Transport Passage

A. The chamber must be able to pass through according to its overall external dimensions; B. Special attention shall be paid to turning corners, doorway size, elevator size, and other restricted passages

Floor Load Capacity

Floor load-bearing requirement: ≥600 kg/m² (applicable to installations on upper floors or elevated platforms)

Installation Space Requirements

1. Adequate maintenance space shall be reserved around the equipment: A ≥60 cm, B ≥60 cm, C ≥120 cm;
2. The floor shall be flat and well ventilated, complying with GB50209-2002 standard (flatness ≤5 mm/2 m);
3. No strong vibration sources around the equipment;
4. No strong electromagnetic interference;
5. No flammable, explosive, corrosive substances or dust

2

Operating Environment Conditions

Ambient temperature: 5°C ~ 35°C;

Relative humidity: ≤85% RH;

Atmospheric pressure: 86 kPa ~ 106 kPa

3

Power Supply Conditions

Frequency allowable fluctuation: (50 ± 0.5) Hz; Protective grounding resistance: < 4 Ω;

A dedicated air switch or power switch with appropriate capacity must be provided at the installation site, and it must be used exclusively for this equipment

4

Storage Conditions

1. When not in operation, the chamber shall be stored at 0°C ~ 45°C;

B. If storage temperature is below 0°C, for water-cooled and humidity-type chambers, all residual water inside the system must be drained to prevent freezing and pipeline damage