Programmable Constant Temperature & Humidity Chamber

The High and Low Temperature Alternating Humidity Test Chamber is used to test the heat resistance, cold resistance, dryness resistance, and humidity resistance of various materials. Suitable for use in electronics, electrical appliances, automotive, metal, chemical, and building materials factories.

 

The Balanced Temperature and Humidity Control System (BTHC) uses P.I.D. to control the SSR, ensuring that the system's heating and humidification capacity equals the heat and humidity loss, thus enabling long-term stable operation. It features a compressor-based balanced temperature and humidity control system, an automatic/manual adjustment valve, an expansion valve, and a cold balance control refrigeration system.

 

Meets the following standards:

 

GB/T2423.1 - Low Temperature Test Method; IDT IEC60068-2-1

GB/T2423.2 - High Temperature Test Method; IDT IEC60068-2-2

GB/T2423.3 - Constant Damp Heat Test Method; IDT IEC60068-2-78

GB/T2423.4 - Alternating Damp Heat Test Method; IDT IEC60068-2-30

GB/T2423.34 - Temperature/Humidity Combined Cyclic Test Method; IDT IEC60068-2-38

GB/T2423.50 - Test Cy: Constant damp heat is mainly used for accelerated testing of components; IDT IEC60068-2-67

GJB150.3A - Environmental Testing Methods for Military Equipment Laboratories: High Temperature Test;

GJB150.4A - Environmental Testing Methods for Military Equipment Laboratories: Low Temperature Test;

GJB150.9A - Environmental Testing Methods for Military Equipment Laboratories: Damp Heat Test

GB/T11158 - Technical Conditions for High Temperature Test Chambers; GB/T10592 - Technical Conditions for High and Low Temperature Test Chambers;

GB/T10589 - Technical Conditions for Low Temperature Test Chambers; GB/T10586 - Technical Conditions for Damp Heat Test Chambers;

Testing Standards

GB/T5170.5-2016 "Test Methods for Environmental Testing Equipment for Electrical and Electronic Products: Damp Heat Test Equipment"

JJF1101-2019 "Calibration Specifications for Temperature and Humidity Parameters of Environmental Testing Equipment"

Technical Parameters ：

Inner dimensions	W×H×D ：1700×1600×1000(mm)（2720L）
Outer Dimensions	W×H×D ：2200×1950×2600(mm)
Temperature range	-50℃ ~ +120℃ (Editable)
Humidity range	20% RH ~98% RH (Editable) (Meets the requirements of 85℃ temperature and 85% RH humidity, i.e., double 85 test)
Temperature and humidity uniformity	Temperature: ≤1℃ Relative Humidity: Uniformity ≤3.0%RH when humidity >75%; Uniformity ≤5.0%RH when humidity ≤75%
Temperature and humidity  fluctuations	Temperature: ±0.2℃  Relative Humidity: ±2.0%RH
Temperature and humidity deviation	Temperature: ±1.0℃ Relative Humidity: ±3.0%RH
Temperature and humidity sensor	Temperature: PT100 Humidity: Wet and dry bulb sensor
Heating rate	1~5℃/min (approximately 40 minutes to raise temperature from -40℃ to 150℃) Nonlinear no-load
Cooling rate	1~2℃/min (approximately 50 minutes to decrease from 30℃ to -40℃) Nonlinear no-load
Temperature limits	Maximum temperature: +120℃ Minimum temperature: -50℃

Product structure

Inner material	SUS #304 Stainless steel sheet
Outer material	Electrostatic powder coating
Thermal insulation material	Rigid Polyurethane Foam + Glass Wool
compression	Silicone foam compression 1 strip
USB  Interface	1 unit (can be connected to a computer for remote operation)
Test Hole	There is one test hole (φ50mm×2) on each of the left and right sides of the box.
Shelves	The cabinet contains two height-adjustable stainless steel shelves. (Material: SUS #304 stainless steel)
tripod	Four Foma casters are installed at the bottom of the machine body.
Heater	Adopting imported Taiwanese stainless steel finned heat dissipation tubes and U-shaped heating tubes
humidifier	Split-type humidifier cartridge design
Fan	4 motors Stainless steel extended shaft Multi-blade aluminum alloy impeller (SIROCCO FAN) Special adjustable louvered airflow circulation system
Box door	Single door, double door, embedded non-reactive handle Four-layer vacuum tempered glass enlarged window (clearly visible observation of samples inside the chamber) Electrically heated automatic defogging, LED lighting
Humidity system	Contains a 15L stainless steel water tank (1 unit), an automatic water pump (automatically supplies water from the lower tank to the upper tank), a water recycling system, and a water shortage alarm.
Waterway system	Automatic water inlet and drainage system (including filtration device)
Overall machine noise	≤70dB. 1m away from the centerline of the equipment front (perpendicular to the equipment front); at half the height of the equipment from the ground, with a ground height range of 1m≤H≤1.5m.

The refrigeration system

employs multi-stage automatic load capacity adjustment technology, resulting in higher efficiency and greater energy savings.

compressor	Two cascade compressor units with balanced temperature control - French "Tecumseh" / American "Copeland" hermetic compressors
condenser	water cooling （ water towel prepared by yourself）
Evaporator	Fin-type multi-stage automatic load capacity adjustment
Expansion valve	Original Danfoss components from Denmark
Refrigerant	The latest environmentally friendly refrigerants R404A and R23 imported from the United States
Refrigeration auxiliary components	The desiccant (Denmark), oil separator (USA), refrigerant sight glass (Denmark), solenoid valve (original import), filter (original import), pressure controller (South Korea), shut-off valve (Italy), and other refrigeration components are all imported.

Protect system

Zero-crossing fluid power controller

Heating air burn protection switch

Compressor overpressure protection switch

Compressor overload and overcurrent protection switch

Phase loss protection switch

Fuse-less overload protector

Water tank water shortage protection switch

Main Controller

Temperature and humidity controller:

a. Controller features

Independently developed 7-inch color programmable touch screen controller

Touchscreen direct button type (touchscreen operation control)

Simultaneously programmable temperature and humidity controller

Chinese and English display

256×128 dot wide viewing angle graphics

High contrast large LCD liquid crystal display controller with adjustable backlight

b. Controller Specifications:

Accuracy: Temperature ±0.01℃, Humidity ±1%RH

Resolution: Temperature ±0.01℃, Humidity ±0.1%RH

Features upper and lower limit standby and alarm functions

Temperature and humidity input signal selection: PT 100Ω×2 (dry bulb and wet bulb)

9 sets of P.I.D control parameter settings, automatic P.I.D calculation

Automatic dry and wet bulb calibration

c. Screen Display Functions:

Interactive screen display, no key input required, direct touch selection

Direct display of temperature and humidity settings (SV) and actual (PV) values

Displays the currently executing program number, segment, remaining time, and number of cycles

Cumulative running time function

Temperature and humidity program settings are displayed as graphical curves, with real-time display of program curve execution

Separate program editing screen, each page can input at least 5 segments of temperature, humidity, and time

Switchable between Chinese and English

Fault prompt screen display

Screen backlight adjustment available.

Screen display protection function can be set to timer, TIMER, or manual shutdown.

d. Program capacity and control functions:

Usable program groups: Up to 120 PATTENs

Usable memory capacity: 1200 SEGMENTS

Repeatable commands: Each command can be executed up to 999 times

Program creation is interactive, with editing, clearing, and insertion functions.

SEGMENTS time setting: 0～99Hour59Min

Features power-off program memory, automatic restart and continuation of program execution after power restoration.

Real-time display of graphical curves during program execution.

Features scheduled start and shutdown functions.

Features date and time adjustment functions.

Button and screen lock (LOCK) functions.

Main Components

AC contactor: Schneider Electric

Thermal relay: Schneider Electric

AC relay: Schneider Electric

Time relay: Schneider Electric

Controller: Self-developed

Over-temperature protector: Rainbow (Korea)

Main power switch: Schneider Electric

Solid State Relay: Yangming

Push Button Switch: Taiwan

Dry Burn Protector: Italy

Other instruction :

Operating Voltage: 380V±10% 50HZ

Power Specifications: Total Installed Power: 23KW (Compressor + Heating + Humidification)

Maximum Stable Operating Power: 15KW (Cold Balance Technology)

Water Requirements: RO Reverse Osmosis Pure Water or Distilled Water

Operating Environment: Permissible Operating Temperature: 0 ~ 30℃

Performance Guarantee Environment: 5 ~ 25℃

Installation Ground: No Significant Inclination

No Other Items Within 60CM of the Instrument

Accessories: 2 sets of Ø50mm Test Holes with Threaded Caps on Both Sides of the Unit

Items Excluded from the Estimate:

1. Site Preparation

2. Input Side Electrical Equipment

3. Input Side Electrical Wiring

4. Natural Drainage Piping

5. Drainage Outlet Equipment