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Constant temperature and humidity test chamber

Constant temperature and humidity test chamber

Model: UT2054, IEC60068-2

Constant temperature and humidity test chamber Equipment for testing the performance of materials in various environments and testing various materials heat-resistant, cold-resistant, dry-resistant, moisture resistance. Suitable for electronics, electrical appliances, mobile phones, communications, instruments, vehicles, plastic products, metals, food, chemical, building materials, medical, aerospace and other products for quality testing.


It is composed of three parts: heating, humidification and refrigeration. By means of a circulating motor mounted on the top of the box, the air is discharged into the box to achieve gas circulation and balance the temperature and humidity in the box. The data collected by the humidity sensor is transmitted to the temperature and humidity controller (microprocessor) for editing Processing, issuing control instructions.


General Introduction

Constant temperature and humidity test chamber Equipment for testing the performance of materials in various environments and testing various materials heat-resistant, cold-resistant, dry-resistant, moisture resistance. Suitable for electronics, electrical appliances, mobile phones, communications, instruments, vehicles, plastic products, metals, food, chemical, building materials, medical, aerospace and other products for quality testing.


It is composed of three parts: heating, humidification and refrigeration. By means of a circulating motor mounted on the top of the box, the air is discharged into the box to achieve gas circulation and balance the temperature and humidity in the box. The data collected by the humidity sensor is transmitted to the temperature and humidity controller (microprocessor) for editing Processing, issuing control instructions.

Key Features

  • Specimen limitations
  • Volume, dimensions and weight
  • Structural features
  • Heater and Humidifier
  • Refrigeration system
  • Electrical control system
  • Standard

This test equipment prohibits:

Testing or storage of flammable, explosive and volatile substance specimens

Testing or storage of corrosive substance specimens

Testing or storage of biological specimens

Testing or storage of specimens of strong electromagnetic emission sources

Testing or storage of specimens of radioactive materials

Testing or storage of highly toxic substance specimens

Testing or storage of specimens that may produce flammable, explosive, volatile, highly toxic, corrosive and radioactive substances during testing or storage

Volume408L
Inner sizeW 800mm × D 600mm × H 850mm
Machine dimensionW 1350mm × D 1150mm × H 1950mm
Weight300KG
Power380V, 50HZ, 8KW


Insulated enclosure 
  1. Outer wall material: high quality sand surface stainless steel plate

  2. Inner wall material: high-quality mirror stainless steel plate (sealing strip can withstand high and low temperature range -100 degrees---- +300 degrees, life of 10 years)

  3. Cabinet insulation material: rigid polyurethane foam + glass fiber

Air conditioning channel A 
  1. Adopt multi-wing centrifugal cycle bad fan, strengthen the shaft and make aluminum alloy of rotating blades that are resistant to high and low temperatures to achieve forced convection.

  2. FLOW THROW air delivery mode; Horizontal diffusion vertical heat exchange arc cycle.

Test chamber standard configuration 
  1. Observation window: transparent electric heating film hollow tempered glass 1 (located on the door) 23 * 30cm

  2. Lead hole: φ50mm 1 (located on the left side of the box)

  3. Indoor lighting on the door (high-efficiency longevity energy-saving lamp)

  4. Moving castors: 4 pcs 

  5. Sample holder: stainless steel sample holder 1 layer, hook 4, load-bearing (uniform): 25kg/layer

(The cumulative total load of samples in the box does not exceed: 100kg)

DoorSingle-open hinged door (left hinge, right handle) with observation window, lighting, window frame/door frame anti-condensation electric heating device.
Control panelController display, power switch, and status indicator
Mechanical roomRefrigeration unit, water connection plate, drainage holeCondensing fan, condenser inlet, replenishment tank
Distribution control cabinetIO boards, machine transformers, ballasts, intermediate relays, time   relays, solid state relays, AC contactors, thermal relays, fuses, air switches


Humidifier(Humid heat type only)
  1. External detachable boiler humidification method

  2. Stainless steel armored heater

  3. Heater control mode: no contact and other periodic pulse widening, SSR (solid state relay)

  4. Water level control device, heater anti-drying device, sediment collection device, liquid level observation window

  5. Humidifier power: 2.5KW

waterway(Humid heat type only)
  1. Replenishment water tank 50L, with high and low water level indication, can be removed and cleaned

  2. Efficient electromagnetic extrusion pump, can run continuously for 5000H

  3. High and low temperature double water level electronic level switch, which can prevent misoperation

  4. Water shortage air incineration over-temperature protection + ultra-low water level protection + water supply overtime to ensure the safe operation of equipment

Power cord holes and drain holesLocated on the back of the cabinet


Mode of work ATwo levels compression
Refrigeration compressorsFully enclosed low noise rotary lobe compressor
evaporatorFinned tubular heat exchanger (doubles as a dehumidifier)
condenserAir-cooled: Finned tube heat exchanger.
Throttle deviceExpansion valve + capillary
Plate heat exchanger(Cascade refrigeration system adopted)Stainless steel brazed plate heat exchanger
Refrigeration control mode
  1. The control system automatically adjusts the best energy-saving working conditions of the refrigeration machine according to the test   conditions

  2. The cooling capacity of the evaporator is switched by the control system driven by the solenoid valve

  3. Compressor return air cooling circuit

Refrigerant

R404a/R23

 (Ozone depletion index is 0, R23 is used for cascading refrigeration systems)


Monitor5 inch
Running wayProgram mode, valuation mode
Setting wayChinese and English menu (can be freely selected), touch screen input
Program capacity
  1. Program: Up to 10 groups

  2. Number of segments: Maximum 120 segments

  3. Number of loops: Maximum unlimited loops

Set the rangeTemperature: Adjusts according to the temperature operating range of the device.
resolutionTemperature: 0.1°C; Time: 1min; Humidity: 0.1%RH (temperature and humidity test equipment)
InputPT100 Platinum thermal resistance
Control mode
  1. Anti-integral saturation PID

  2. BTC balanced temperature control mode + DCC intelligent cooling control + DEC intelligent electrical control (temperature test equipment)

  3. BTHC balance temperature regulation and humidity control mode + DCC intelligent cold volume control + DEC intelligent electrical control (temperature and humidity test equipment)

Curve recording functionRam with battery protection to save the setpoint, sampling value and time of the sampling moment of the device; Maximum recording time is 180 days (when the sampling period is 60S)
Satellite features
  1. Fault alarm and cause, processing prompt function

  2. Power failure protection function

  3. Upper and lower limit temperature protection function

  4. Calendar timing function (auto start and auto stop run)

  5. Self-diagnosis function.

Temperature and humidity measurement.Temperature: PT100 Platinum thermal resistanceHumidity: Wet and dry bulb thermometer method (damp heat type only)


GB/T2423.1-2008 (IEC60068-2-1:2007) Low temperature test method Ab

GB/T2423.2-2008 (IEC60068-2-2:2007) High temperature test method Bb

GJB150.4-1986 Low temperature test

GJB150.3-1986 high temperature test

GB/T2423.3-2006 (IEC60068-2-78:2007) Constant humid heat test method

GB/T2423.4-2008 (IEC60068-2-30:2005) Alternating damp heat test method

GJB150.9-1986 Damp heat test (Figure 1, Figure 2)

Main Technical Specification

Test the environment conditionsThe ambient temperature is +5 to +28 °C, the relative humidity is ≤ 85%, and there is no specimen in the test chamber
Test methGB/T 5170.2-2008 Temperature test equipment; GB/T 5170.5-2008 Damp heat test equipment
Temperature range0℃~+150℃
Humidity range20%---98%  Humidity Temperature (25 to 85 degrees Celsius can do humidity)
Temperature fluctuations≤0.5℃(≤±0.25℃)
Temperature deviation±2℃
Temperature uniformity≤±2℃
Temperature rising time3℃/min
Temperature falling time1℃/min
Humidity range(Humid heat type only)

(20~98)%RH 

Constant temperature and humidity test chamber

 Temperature and humidity can be controlled range diagram

Relative humidity deviation(Humid heat type only)±2.0%RH
Meet the test method 

GB/T2423.1-2008 (IEC60068-2-1:2007) Low temperature test method

GB/T2423.2-2008 (IEC60068-2-2:2007) High temperature test method 

GJB150.4-1986 Low temperature test GJB150.3-1986 high temperature test

GB/T2423.3-2006 (IEC60068-2-78:2007) Constant humid heat test method 

GB/T2423.4-2008 (IEC60068-2-30:2005) Alternating damp heat test method   

GJB150.9-1986 Damp heat test (Figure 1, Figure 2)

(The load per cubic meter is not more than 35kg/m3 of steel heat   capacity, and there is no active humidity or heat load during the damp heat test)

Hot and humid system water supply (hot and humid type only)
Water supply modePump lifting
Location of the water supply unitFront drawer tank
Storage tank volume50L(Portable)
Water quality requirements for water supplyResistivity ≥500Ω·m
Safety protection devices
Refrigeration system
  1. The compressor is overheated

  2. Compressor overcurrent

  3. Compressor overpressure

  4. The condensing fan is overheated

Humidification system(Humid heat type only)
  1. Humidify the heat pipe to dry burn

  2. Abnormal water level

  3. Water supply timeout

Test chamber
  1. Adjustable overtemperature

  2. Air conditioning channel limit overtemperature

  3. The fan motor is overheating

Other
  1. Total power supply phase sequence and phase loss protection (for three-phase power supply)

  2. Overload and short circuit protection

  3. The box opens the door multiple times to cause the refrigeration system to fail and protect the alarm

Other configurations
Power cable380V  8KW
Total power switchNFB breaker
Installation site
  1. The ground is flat and well ventilated

  2. There is no strong vibration around the device

  3. There is no strong electromagnetic field around the equipment

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

  5. There is appropriate space for use and maintenance around the equipment, as shown in the following figure:

Constant temperature and humidity test chamber

A: Not less than 60cm 

B: not less than 120cm 

C:   not less than 60cm 

D: not less than 120cm

Environmental   Conditions
  1. Temperature: 5°C~35°C

  2. Relative humidity: ≤85%

  3. Air pressure: 86kPa ~ 106kPa

Tap water 

(Only for humid heat type equipment with pure water machine) 

Flow rate ≥ 200kg/h, pressure 0.1MPa ~ 0.25MPa Tap water meets GB 5749-1985 drinking water sanitation standards  

Note: Pure water machine with DN15 female thread joint


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Beijing United Test Co., Ltd.