Programmable Temperature and Humidity Test Chamber

I. Main functions and precautions of the equipment

1. product profile

This series of products is primarily designed to simulate harsh environments encountered during transportation, storage, and operation for analog electronic instruments, advanced materials, electrical components, automotive parts, metals, electronics, and aerospace materials. It evaluates the thermal resistance, cold tolerance, and moisture resistance of materials, components, or equipment under extreme conditions including prolonged exposure to high/low temperatures and alternating thermal cycles, while assessing potential damage or lifespan reduction caused by these environmental stresses

2. product function

This series of temperature laboratory is suitable for reliability test of industrial products, with the characteristics of temperature control accuracy and wide range of control. The performance index meets the requirements of GB/T5170 "Verification Method for Basic Parameters of Environmental Test Equipment for Electrical and Electronic Products Low temperature, high temperature and constant temperature test equipment".

3. test sample

restrictions

Test and storage of samples of inflammable, explosive and volatile substances

Test and storage of corrosive material samples

Test or storage of biological specimens

Test and storage of samples with strong electromagnetic emission source

4. load condition

requirements

The total mass of the load shall not exceed 50Kg per cubic meter of studio volume

The total volume of the load is not greater than 1/5 of the studio volume

On any section perpendicular to the dominant wind direction, the sum of the load areas shall not be greater than the work at that location

The cross-sectional area of the chamber is 1/3. When the load is placed, the flow of air should not be blocked

II. Equipment installation site and operating environment conditions

1. venue requirements

Equipment installation site size requirements

A: not less than 800mm

B: not less than 500mm

C: not less than 1200mm

The ground is flat and well ventilated;

There is no strong vibration around the equipment;

There is no strong electromagnetic field around the equipment;

There are no flammable, explosive, corrosive substances and dust around the equipment;

There is appropriate space around the equipment for use and maintenance;

2. ambient condition

Temperature: 5~30℃, relative humidity ≤85%RH

Pressure: 86kPa~106kPa

3. maximum power

The total installed capacity is 4.9Kw, including 1.2Kw refrigeration power, 1.4Kw heating power, 1.8KW humidification power and 0.2Kw other power

4. maximum current

≤16A

5. equipment humidification water supply

Water supply pressure 0.2~0.4Mpa, water supply pipe diameter 20mm, water quality shall meet the level 3 water standard stipulated in GB/T 6682-2008 Analytical Laboratory Water Specifications and Test Methods Standard, equipment reserved water supply interface 1/2" internal thread, equipment equipped with a tank volume of about 20L

6. drainage interface

There is a drain near the equipment, within 2 meters behind the equipment,

Note: Guide the condensate and water in the water meter removal pipe to flow out of the tank

7. power supply conditions and power sources

AC220V single-phase two-wire + protective grounding

Voltage fluctuation range: ±10%V

Frequency: (50±0.5) HZ fluctuation range

Power supply in TN-S mode or TT mode

The grounding resistance of the protective ground wire is less than 4Ω

Users are required to install air or power switches with appropriate capacity for the equipment at the installation site, and the switch must be independently controlled by the equipment

III. Volume and size

1. model

CZ-A-150G

2. equipment volume

150L

3. internal dimensions of test chamber

W (width) 500 mm*H (height) 600 mm*D (depth) 500 mm

4. external dimensions of test chamber

W (width) 1020 mm*H (height) 1500 mm*D (depth) 1220 mm

Note: The door hinge of the machine is not oversized! The external dimensions should be confirmed by the final three views design!

IV. Main performance parameters

1.         test condition

The temperature performance test is measured according to the relevant provisions of GB/T 5170.2-2017 temperature test equipment when measuring at ambient temperature +25℃ no-load; the sensor is placed at the air outlet of the air handling unit

2.         temperature range

-70℃ ～ +150℃

3.      humidity range

20%R.H~98%R.H (as shown below), no heating load during humidity test

4.         temperature fluctuation

≦±0.5℃

5.         temperature uniformity

≤2.0℃ (no load)

6.         temperature departure

≤±2.0℃ (no load)

7.         relative humidity fluctuation

≦±2.5%R.H

8.         humidity deviation

When RH is greater than or equal to 75%, it is less than or equal to +2-3%R.H;

<75%RH when ≤±5%R.H;

9.         heating rate

≥3℃/min (under average no-load conditions throughout the process)

10.     cooling rate

1.2 ≥℃/min (under the condition of full load average)

11.     working noise

Not less than 75 decibels (dB) (measured at a distance of 1m from the door of the equipment and 1.2 meters above the ground by the noise detection device)

12.     the test meets the standard

GB/T-2423.1-2008 (IEC60068-2-1) Test A: Low temperature test method.

GB/T-2423.2-2008 (IEC60068-2-2) Test B: High temperature test method.

GB/T-2423.3-2016 (IEC60068-2-78:2012) Environmental test Part 2 Test method Test Cab constant humidity and heat test.

GB/T 2423.4-2008/IEC60068-2-30:2005 Environmental Test for Electrical and Electronic Products Part 2: Test Methods Test Db: Alternating wet heat (12h + 12h cycle)

GJBl50.3-2009 MIL-STD-810D high temperature test method.

GJBl50.4-2009 (MIL-STD-810D) Low temperature test method.

13.     equipment meets inspection method

GB-T-10586-2008 Technical conditions for low temperature test chamber

GB/ T 5170.1-2016 Inspection method for environmental test equipment of electrical and electronic products Part 1: General

GB/T 5170.2-2017 Inspection method for environmental test equipment Part 2: temperature test equipment

GB/ T 5170.5-2016 Inspection method for environmental test equipment of electrical and electronic products Part 5: test equipment for damp heat

GB/T5170.18-2005 Basic parameter verification method of environmental test equipment for electrical and electronic products Temperature/humidity combination cycle test equipment

V. Structure characteristics of the box

1.         test box structure layout

The test chamber adopts the integrated structure layout, with the test chamber body in the upper left, the refrigeration mechanical room in the lower left, and the control box on the right;

The equipment is equipped with Foma casters at the bottom for easy relocation and positioning

The equipment box is made of cold rolled steel plate baked paint, the thickness of the plate is 1.2mm, the color of baked paint is light gray, color number RAL7035, the inner box is made of SUS304# stainless steel, the thickness of the plate is 1.2mm;

The equipment adopts a frame structure, and the bottom of the box is welded with channel steel to increase the strength of the box

Insulation material: hard polyurethane hard foam + glass fiber 100mm thick

The general power supply protection circuit breaker, power supply cable and drainage pipe are set behind the equipment

The box door is sealed with silicone rubber sealing strip, which is specially customized to be heat-resistant, non-toxic and super flexible

The bottom of the inner box is set with a drain hole, which can quickly discharge the condensate

An automatic pressure relief hole is set on the top of the box

2.         drain off water

The bottom of the inner box is equipped with a drainage hole, and the drainage system is arranged on the rear side of the equipment. The drainage pipe is introduced into the user's drainage pipe network system (the user provides the on-site drainage pipe network interface)

3.         pressure relief hole

Multiple pressure balance Windows are set at the edge of the back of the box. When the switch door or the air inside the box expands, the pressure can be quickly and automatically discharged;

4.         chamber door

Single hinge door, effective clear size W500mm*H600mm

The door material is the same as the body material

Imported door lock, outward opening type

The insulation material with 100mm door thickness is rigid polyurethane foam

A water tray is designed under the door to prevent condensation on the inner wall of the door from falling onto the outdoor ground;

5.         container material

The SUS304# stainless steel plate is used, precision laser cutting equipment is used to cut and CNC folding bed bending molding, then argon arc welding is used for full welding, grinding and polishing. The steel plate thickness is 1.2mm; the inner box is set on both sides of the sample rack support table to support the indexing frame, which can adjust the spacing between the sample racks

6.         outer box material

The product is manufactured using cold-rolled steel plates, precision laser cutting equipment, and CNC bending machines for forming. After undergoing argon arc welding and polishing, the steel surface undergoes comprehensive acid washing to remove rust. Compared with conventional spray coating methods, this process delivers a more aesthetically pleasing appearance while significantly enhancing corrosion resistance and rust prevention capabilities. The steel plate measures 1.2mm in thickness (Color: RAL7035 White).

7.         sealing joint strip

The door sealing strip is divided into two layers, the inner layer is high and low temperature resistant silicone rubber strip, which can fully isolate the inner box from the outside world under high and low temperature conditions; the silicone rubber strip can work for a long time in the range of-80℃ to 200℃ without hardening and aging;

8.         stainless steel hinges

The left side of the box door is installed with a set of high strength hinges. A single hinge can withstand 3 tons of force horizontally without breaking, and when bent in reverse, the two pieces of the hinge are completely deformed and combined into one without breaking;

9.         door handle

Door lock adopts roller forced door lock:

The box door is used inside and outside, using the lever principle, with strong urgency, labor saving, single hand touch can be achieved to open and close the function.

10.     exhaust structure

The strong air circulation mode of internal forced circulation, upper air outlet and lower air return is adopted. The air outlet deflector can disperse the cold and hot air to the whole interior of the warehouse, which is uniform and stable

11.     aluminum wind wheel

Multi-blade centrifugal circulating aluminum wind wheel has the characteristics of light weight, large air volume, high wind pressure, and is resistant to high and low temperature, small expansion coefficient, and low operating noise.

12.      observation window

The door is attached with multiple layers of hollow large glass observation window, with electric heating (automatic adjustment) anti-frost and anti-condensation device; the window is equipped with a set of window lighting lamp, so that you can clearly observe the test condition of the test sample in the box at any time through the observation window;

13.     instrument connection

An opening with a diameter of 100mm is opened on the left side of the box, and a hole cover and silicone stopper are provided

14.     test material rack

The SUS304# stainless steel is punched and bent into a mesh. It is easy to use, the spacing between material racks can be adjusted to the minimum of 45mm, and two sample racks are standard

15.     air circulation principle

High power fan driven by external motor with stainless steel shaft, the fan motor is externally mounted;

The air is driven by the motor and flows fully through the heater and refrigeration evaporator.

After being fully heated/cooled to the required temperature value, the air circulates inside the box and exchanges heat with the specimen through convection

The air forced circulation is driven by a low voltage asynchronous high temperature resistant long shaft motor

The multi-blade centrifugal circulating fan is used to stir the air with aluminum alloy blades

16.     control system principle

High quality nickel chromium alloy wire electric heater, SSR control, equipped with independent over temperature protection temperature switch

When the heater is energized, the surface temperature will rise.

The temperature of the air is increased after passing through the heating wire, and the heat is expanded to the air and test pieces in the box, so as to play a role in heating and temperature rise.

The heating power is precisely controlled by PID algorithm, and the output power is adjusted through solid state relay.

The refrigeration system provides sufficient low-temperature refrigerant to the heat exchanger, so that the temperature of the heat exchanger is lower than the air temperature. The heat in the air is absorbed and carried out of the box by the heat exchanger, so that the air temperature drops and the cooling effect is achieved.

The refrigeration power is precisely controlled by PID algorithm, and the flow rate and cooling capacity of refrigerant are adjusted through solenoid valve.

VI. Refrigeration system

1. refrigeration compressor

Use low temperature compressors imported from Europe

2. cooling-down method

Air-cooled finned condenser, cooling fan for heat dissipation

3. evaporimeter

Tubular heat exchanger with翅ned tubes

4. throttling set

Thermal expansion valve, capillary tube

5. cooling machine control mode

The programmable logic controller of the control system automatically adjusts the operating condition of the refrigeration machine according to the test conditions

Compressor return gas cooling circuit

6. all imported refrigeration parts

7. evaporative condenser

The plate heat exchanger with high temperature copper brazing has the advantages of small surface area, small energy loss and high heat transfer efficiency

8. cryogen

The ozone depletion index of R404a/R23 is 0

9. nitrogen-filled

welding process

Low temperature transfer pipe is recommended to use high quality oxygen-free copper pipe, pipe making, nitrogen welding, 48 hours of high pressure leakage prevention process to ensure the welding quality.

10. energy saving control

The refrigeration system utilizes cooling balance technology, achieving approximately 30% energy savings and effectively reducing operational costs. As shown in the diagram above, thermal balance maintains constant temperature by adjusting heating output. When the compressor's cooling capacity remains constant, continuous heating increases energy waste and imposes unnecessary expenses on users. In contrast, cooling balance technology regulates cooling capacity to maintain temperature stability. As the temperature approaches the set point, the cooling capacity gradually decreases through PID control (PID stands for Proportional Integral Derivative), ensuring constant temperature while achieving energy efficiency. Theoretically, it can achieve zero heating output, though minor residual heating may occur in actual production

11. features of refrigeration system

A. The whole system pipeline was tested with 22kg air pressure.

B. The heating and cooling systems are completely independent.

C. With the professional technical characteristics of our company, the air flow of high temperature and high pressure can not be damaged by the simultaneous opening of the refrigeration machine.

D. All the operating procedures of the refrigeration system are completely controlled by the microcomputer controller.

E. The bottom of the compressor has a water tray, which can collect the condensation caused by frost.

F. The compressor has a built-in PTC temperature sensor to achieve overtemperature protection when the compressor is overheated.

G. The compressor is equipped with oil pressure protector to realize the oil pressure protection of the compressor.

H. The high and low pressure protection device monitors the refrigerant pressure during the operation of the equipment. Once the refrigerant pressure exceeds the limit pressure of the system or falls below the minimum pressure set by the system, it will immediately give an alarm and cut off the power supply until the fault is removed.

The refrigeration system uses imported brand parts, the quality is reliable, to ensure the stability of the system.

VII. Electrical control system

1. controller

7-inch TFT true-color LED LCD touchscreen (HD resolution: 1024×600), multi-group PID intelligent control. Direct display of real-time measurement (PV) values; Temperature display; Scalable multi-channel monitoring temperature display; Display of program number, cycle sequence, operation time, and cycle count; Curve graph display; Relay and PID output status display

2. run mode

Program operation, fixed value operation. The whole process is intelligent PID automatic control

3. control model

Temperature and humidity combined control/single temperature control automatically adjusts according to the humidity set value

4. operating language

Native Chinese/English/Russian switching display

5. set way

Human-machine dialogue operation interface, touch input

6. temperature and humidity input

PT100 Grade A platinum resistance

7. display resolution

Temperature: 0.01℃; humidity: 0.1%RH; time: 1min;

8. program capacity and control function

Number of programs available: up to 100 groups, with each program consisting of 1-100 segments. Command execution limit: each command can be executed up to 999 times. Program slope settings can be configured via the timeline, allowing maximum segment durations of 99 hours and 99 minutes between programs, with minimum durations set at 1 minute. Programs can also be linked for combined use

The system features editing, clearing, and insertion functions with time signal output control (controlling the ON/OFF actions of test objects). During program execution, it supports jump segments and hold functions. The screen allows backlight adjustment with customizable duration settings. Display protection can be configured for timed or manual shutdown. Key features include program replication, COPY command, connection functions, and experiment title editing. It retains programs during power outages and automatically resumes execution upon reconnection. Scheduled startup/shutdown functions, date/time adjustment capabilities, key/screen locking mechanisms, and standby image viewing are all integrated

9. control output mode

PID+ SSR output automatic control; PID automatically adjusts heating output. The refrigeration system features a cold end and multi-way electronic expansion valve control, allowing corresponding valve adjustments based on compressor suction/exhaust temperature and pressure to optimize operating conditions. Electronic expansion valve control can switch between evaporator pressure control and conventional temperature control

10. communication function

Can connect to the computer to display the curve and collect data;

Can be used as monitoring and remote control system;

Multiple machines can be controlled synchronously;

RS-485/RS-232

RJ45 Ethernet interface

USB joggle .

11. storage on USB drive

You can plug in 1G-32G USB to download historical curves, historical data, control system parameters, and hot plug function

12. data recording method

RAM with battery protection, 8-10 years, can save the device's set value, sampling value and time of sampling; the curve recording period can be set 30~180 sec, the maximum memory time can store continuous historical curves for 90 days, historical data (when sampling time is 1min), without continuous use, the data can be saved for more than 10 years

13. power-off memory function

The power failure recovery mode can be set as: hot start/cold start/stall.

14. schedule the boot function

You can set the startup time at will. After turning on the power, the machine will automatically run when the time is up.

15. software compatibility system

Windows operating system

16. open software functionality

Support third-party upper-level code to control device startup, stop, and data recording functions

Note: The controller provides functional codes, and the user can edit the upper computer software program to realize unified monitoring and control

17. network connections

It can be connected to the Ethernet through professional software, and can be remotely controlled and assisted through the network. It can also collect test data through the network, and can control multiple machines at the same time.

18. situation display

At the top of the equipment, install a cylindrical three-color sound and light alarm (using LED lights); when the start or operation is completed, the yellow light stays on; when running normally, the green light stays on; when emergency stop or equipment fault alarm occurs, the red light stays on and the buzzer sounds intermittently;

19. circulating fan

High temperature resistant, long shaft motor, motor safety in outdoor space, shaft extends to indoor, the tail end of the shaft is installed with mixing fan wheel; special insulation measures and heat dissipation system to improve motor safety.

20. heating control mode

The temperature controller sends commands based on preset temperatures and signals from the temperature sensor inside the test chamber. Through a logic circuit, it regulates the SSR control module to adjust the heater's output. This system operates reliably with contactless technology, spark-free operation, long lifespan, low noise, electromagnetic interference-free performance, fast switching speed, strong anti-interference capability, compact design, vibration and impact resistance, explosion-proof, moisture-proof, and corrosion-resistant features. It achieves direct control of high-current loads through minimal input signals.

VIII. Safety protection system

1.         overtemperature protection

The test box is independent and adjustable electronic overtemperature protection device, automatic pressure balance protection.

2.         refrigeration system

Compressor overheating, high pressure protection, motor overcurrent protection.

3.         circulating fan

 overload protection

4.         calorifier

Overtemperature protection: short circuit protection

5.         humidification system

Moisturizer dry burn water shortage protection, humidifier limit over temperature protection, humidifier short circuit protection

6.         general supply

Overvoltage protection, overload and short circuit protection

7.         control circuit

Overload and short circuit protection

8.         compressor cooling system

Cooling fan overload protection

IX. Acceptance standards and third-party verification

1. Acceptance criteria: Technical indicators shall be in accordance with the methods specified in the "Technical Agreement" signed by both parties.

2. Acceptance method: formal acceptance shall be carried out on the site of the buyer.

3. Before delivery, the buyer shall request a third party (calibrated by the National Environmental Test Equipment Quality Testing Center and issued a valid inspection report) to participate

The acceptance fee shall be borne by the buyer. If the first acceptance fails, the cost of the next acceptance after the supplier's improvement shall be borne by the supplier

Fang undertakes.

4. The customer shall entrust the National Environmental Test Equipment Quality Testing Center to verify,

X. List of main materials

XI. Supporting data of the equipment when it leaves the factory   

1.         factory packing list of the equipment                     1 copy

2.         schematic diagram of electrical equipment                1 copy

3.         equipment manual                                   1 copy

4.         equipment qualification certificate                       1 copy

5.         equipment warranty card                              1 copy

6.         inspection report of the equipment                       1 copy

7.         wet ball gauze                                       5 pieces

8.         controller monitoring software-disc                      1 piece

9.         test sample rack tray                                  2 pieces

10.     supporting rail bars                                   4 pieces

XII. Quality assurance and service commitment

1.         Purpose: Based on the concept of mutual benefit and win-win service, fully meet customer needs, to achieve customer satisfaction.

2.         Pre-sale: professional technical consultation, product test plan suggestion, test chamber installation and construction plan;

3.         In the process of sales: customer communication, progress report, guidance, installation, debugging, trial operation, etc., and cooperate with customers to measure;

4.         Training: According to the contract requirements, on-site training can be provided when the equipment is installed, debugged and put into use for users; users can be arranged to come to the company for on-site technical training during the factory debugging of the equipment, so that customers can understand the performance of the equipment, train the correct use method, reduce the failure caused by improper use of the equipment, and save the maintenance cost for customers;

5.         After-sales Services: Technical Training: Operation and maintenance, troubleshooting of common faults; Regular Follow-up: Equipment inspection, elimination of potential risks, dissemination of the latest industry updates; Specialized spare parts reserve support; Dedicated after-sales service team ensures timely and effective fault resolution with efficient repair services.

6.         Service Commitment: Method: 24/7 customer service hotline and dedicated email. Requirements: Provide clear responses within 4 hours. For on-site services: 24-hour arrival required within the province, 24-hour service for out-of-province clients. Dedicated sales and after-sales teams are stationed at Dongguan or local company offices. Repair timelines may be negotiated based on specific circumstances. From the acceptance date, equipment remains fully covered by our one-year warranty (excluding damage caused by natural disasters, power failures, improper operation, or maintenance errors). If test chamber malfunctions due to manufacturing defects while users comply with storage, usage, and installation guidelines, our technicians will provide free repairs within agreed service hours upon notification. For post-warranty issues, we commit to resolving them promptly with reasonable charges for labor and materials.

XIII. Packaging and Transportation:

1. Packaging: Transportation packaging boxes that meet the requirements of QB/BWD008-2001

2. Mode of transport: Freight

XIV. Training

On-site training can be provided when the equipment is installed, debugged and put into use according to the contract requirements;

Users can be arranged to come to the company for on-site technical training during the debugging of the equipment, so that customers can understand the performance of the equipment and train the correct use

Methods, operation and maintenance, common fault detection and troubleshooting, reduce the failure caused by improper use of equipment, save customers

Approximate maintenance costs

XV. Box structure diagram