High and Low Temperature Circular Air Chamber

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

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

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

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

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.