Programmable constant temperature and humidity test chamber-Demasheng Measurement

DESCRIPTION

Product name	Programmable constant temperature and humidity test chamber
1. Limit sample	This test equipment is prohibited: Testing or storage of samples of inflammable, explosive, or volatile substances The testing or storage of corrosive material samples The testing or storage of biological specimens Test or storage of samples from strong electromagnetic emission sources The testing or storage of specimens of radioactive material The testing or storage of samples of highly toxic substances The test or storage of specimens that may be flammable, explosive, volatile, highly toxic, corrosive, or radioactive during testing or storage
2. Volume, size and weight
2.1. Nominal content product	408L
2.2. size	8006008500MM
2.3. Weight	224KG
2.4. power supply	380V 8KW
3. performance
3.1. Test environment conditions	The ambient temperature is +5~+28℃, the relative humidity is ≤85%, and there are no samples in the test chamber.
3.2. Test methods	GB/T 5170.2-2008 Temperature testing equipment GB/T 5170.5-2008Hot and humid testing equipment
3.2. 3.3. Temperature range	0℃～+150℃
3.3. 3.4. Humidity range	20%-- 98% humidity temperature (25 to 85 degrees humidity)
3.4. 3.4. Temperature fluctuation	≤0.5℃ (note: if expressed as GB/ t5170.2-1996, the volatility is ≤±0.25℃)
3.5. 3.5. Temperature deviation	±2℃
3.6. 3.6. Temperature uniformity	Is less than or equal to ±2℃
3.7. 3.7. Heating time	3℃/min（Mean rate of temperature rise）
3.8. 3.8. Cooling time	1℃/min（Mean cooling rate）
3.9. Humidity range	（20～98）%RH（Refer to temperature and humidity control range diagram, no active wet and hot load） Temperature and humidity control range diagram
3.9. Relative humidity deviation	±2.0%RH

FEATURES

1. Structural features
4.1. Thermal insulation envelope structure	1. Outer wall material: stainless steel sand-faced plate of high quality 2. Inner wall material: high quality mirror stainless steel plate (sealing strip can withstand high and low temperature range -100 ° c -+300 ° c, life span of 10 years) 3. Box insulation material: rigid polyurethane foam + glass fiber
4.2. Air conditioning channel A	1. Adopt multi-wing centrifugal circulation fan, and strengthen the aluminum alloy with high and low temperature resistance to achieve forced convection. 2. FLOW THROW air supply; Horizontal diffusion vertical heat exchange arc circulation. 3. Adjustable side air outlet and cable return air outlet.
4.3. Standard configuration of test box	1. Observation window: 1 transparent electrothermal film hollow tempered glass (located on the door) 2. Lead hole: 50mm 1 (located on the left side of the box) 3. Have indoor lighting on the door (high-efficiency, longevity and energy-saving lamps) 4. Move casters: 4 5. Sample rack: 1 layer of stainless steel sample rack, 4 hooks, load-bearing (uniformly distributed):25kg/ layer (the cumulative total load of samples in the box should not exceed: 100kg)
4.1. door	Single hinged door (facing the box, left hinged, right handle) with observation window, floodlight, window frame/door frame anti-condensation electric heating device.
4.2. Control panel	Controller display screen, power switch and status indicator.
4.3. Mechanical room	Refrigeration unit, water tray, drain hole Condensing fan, condenser inlet, water supply tank
4.4. Distribution control cabinet	IO board, machine tool transformer, ballast, intermediate relay, time relay, solid state relay, ac contactor, thermal relay, fuse, air switch.
4.5. heater	1. Nickel-chromium alloy electric wire heater 2. Heater control mode: contactless pulse width adjustment with equal period, SSR (solid state relay) 3. Heater power: 1.2KW
Humidifier (hot and humid only)	1. External demountable boiler humidification method 2. Stainless steel armored heater 3. Heater control mode: contactless pulse width adjustment with equal period, SSR (solid state relay) 4. Water level control device, heater anti-dry burning device, sediment collection device, liquid level observation window 5. Humidifier power: 2.5kw
Water (hot and humid only)	1. Supply water tank 50L, with high and low water level indicator, removable for cleaning 2. High efficiency electromagnetic extrusion water pump, which can operate continuously for 5000H 4. High and low temperature double water level electronic liquid level switch can prevent misoperation 5. Over-temperature protection for water shortage and air combustion + ultra-low water level protection + water supply timeout to ensure the safe operation of the equipment
1.1. Power line hole and drain hole	Located on the back of the box
2. Refrigeration system
2.1. 5.1. Working method A	two stage compression
2.2. 5.2. Refrigeration compressor	Fully enclosed low noise rotor compressor
2.3. 5.3. The evaporator	Finned tube heat exchanger (doubles as dehumidifier)
2.4. 5.4. Condensation	Air-cooled: finned tube heat exchanger.
2.5. 5.5. Throttling device	Expansion valve + capillary tube
5.6. Plate heat exchanger	Stainless steel brazed plate heat exchanger
2.6. (cascade refrigeration system is adopted)	1. The control system automatically adjusts the optimal energy-saving operation condition of the refrigerator according to the test conditions 2. The evaporator refrigerating capacity is driven by the control system to switch the solenoid valve 3. Compressor return air cooling circuit
2.7. 5.7. Control mode of refrigerator	R404a/R23 (both ozone depletion indexes are 0, and R23 is used for cascade refrigeration system)

PARAMETERS

display	5 inches
Operation mode	Program mode, fixed value mode
Set way	Chinese and English menu (optional), touch screen input
Process capacity	touch type 1. Procedure: maximum 10 groups 2. Number of segments: maximum 120 segments 3. Number of cycles: the maximum number of cycles is infinite
Set the range	Temperature: adjust according to the temperature range of the equipment
Resolution of the	Temperature: 0.1℃; Time: 1 min.Humidity: 0.1% RH(temperature and humidity test equipment)
Input	PT100 platinum thermal resistance
Control mode	1. Anti-integral saturated PID 2.BTC balance temperature control mode +DCC intelligent cooling capacity control +DEC intelligent electrical control (temperature test equipment) 3.BTHC balanced temperature and humidity control mode +DCC intelligent cooling capacity control +DEC intelligent electrical control (temperature and humidity test equipment)
Curve recording function	The RAM with battery protection can save the set value, sampling value and sampling time of the device; The maximum record time is 180 days (when the sampling period is 60S)
Bells and whistles	1. Function of fault alarm, cause and treatment prompt 2. Power failure protection function 3. Upper and lower temperature protection function 4. Calendar timing function (start and stop automatically) 5. Self-diagnosis function.
1.1. 6.2. Temperature and humidity measurement	Temperature: PT100 platinum thermal resistance Humidity: dry and wet bulb thermometer (wet and hot only)
2. Hot and humid system water supply (hot and humid only)
2.1. 7.1. Mode of water supply	pumped
2.2. 7.2. Location of water supply installation	Front drawer tank
2.3. 7.3. Capacity of water storage tank	50L (portable)
2.4. 7.4. Water quality requirements for water supply	The resistivity acuity Ω m. 500
3. Safety protection device
3.1. Refrigeration system	1. Compressor overheats 2. Compressor overflows 3. Compressor overpressure 4. Overheating of the condensing fan
8.2. Humidification system (hot and humid only)	1. Add damp heat tube and dry burn 2. Abnormal water level 3. Water supply overruns
3.2. 8.2. Test cases	1. Adjustable overtemperature 2. Limit overtemperature of air conditioning channel 3. The fan motor overheats
3.3. 8.3. Other	1. General power supply phase sequence and phase loss protection (applicable to three-phase power supply) 2. Overload and short circuit protection 3. Failure alarm protection of refrigeration system caused by multiple opening of the box
4. Other configuration
4.1. power cable	220V 7KW
4.2. Master power switch	NFB circuit breaker
5. Transport	The test box is an integral part for transportation
6. Conditions of use	The user guarantees the following conditions
6.1. Installation site	1. The ground is flat and well ventilated 2. There is no strong vibration around the equipment 3. There is no strong electromagnetic field around the equipment 4. There is no inflammable, explosive, corrosive and dust around the equipment 5. Appropriate space for use and maintenance is left around the equipment, as shown in the following figure: