| 1 | Product name | Desktop Programmable Constant temp and humidity test chamber |
| 2 | Sample limitation | This test equipment prohibits:
Test or storage of samples of flammable, explosive and volatile substances
Testing or storage of samples of corrosive substances
Testing or storage of biological samples
Test or storage of samples of strong electromagnetic emission sources
Testing or storage of samples of radioactive material
Testing or storage of samples of highly toxic substances
Test or storage of samples that may produce flammable, explosive, volatile, highly toxic, corrosive and radioactive substances during the test or storage process |
- Volume/size weight
|
| 3.1 | Internal volume | 50L |
| 3.2 | Internal chamber size | 35cmW*35cmD*40cmH |
| 3.3 | External size | 60cmW*130cmD*98cmH |
| 3.4 | Weight | 180Kg |
| 3.5 | Input voltage | 220V±10% 50Hz |
| 3.6 | Power consumption | 4.5KW Max currant 22A |
- Performance
|
| 4.1 | Test condition | The ambient temperature is +5~+28°C, the relative humidity is ≤85%, and there is no sample in the test chamber |
| 4.2 | Test method | GB/T 5170.2-2008 /IEC60068-2-78:2007/Temperature test equipment
GB/T 5170.5-2008 /IEC60068-2-30:2005/Damp heat test equipment |
| 4.3 | Temp range | -20-150ºC |
| 4.4 | Humidity range | 20%-98%RH |
| 4.5 | Temp fluctuation | <=0.5ºC |
| 4.6 | Temp deviation | ±2ºC |
| 4.7 | Temp uniformity | <=2ºC |
| 4.8 | Temp rise rate | 3ºC/min( on average no loading) |
| 4.9 | Cooling rate | 1ºC/min( on average no loading) |
| 4.10 | Humidity /temp control range | |
| 4.11 | Humidity deviation | ±2%RH |
- structure
|
| 5.1 | Insulation structure | 1. Outer wall material: high-quality sand surface stainless steel plate
2. Inner wall material: high-quality mirror stainless steel plate (the sealing strip can withstand high and low temperature range -100 degrees ----+300 degrees, and the service life is 10 years)
3. Box insulation material: rigid polyurethane foam + glass fiber |
| 5.2 | Air flow | 1. Adopt multi-blade centrifugal circulation fan, strengthen the shaft and make the rotating blade aluminum alloy with high and low temperature resistance, so as to achieve forced convection.
2. FLOW THROW air supply mode; horizontal diffusion and vertical heat exchange arc circulation. |
| 5.3 | Standard configuration | 1. Observation window: 1 hollow tempered glass with transparent electric heating film (located on the door)
2. Lead hole: 1 φ50mm (located on the left side of the box)
3. Prepare indoor lighting on the door (high-efficiency and long-life energy-saving lamps)
4. Mobile casters: 4
5. Sample rack: 1 layer of stainless steel sample rack, 4 hooks, load-bearing (uniform distribution): 25kg/layer
(The accumulative total load of samples in the box shall not exceed: 100kg) |
| 5.4 | Door | Single hinged door (left hinge, right handle when facing the cabinet), equipped with observation window, lighting, window frame/door frame anti-condensation electric heating device |
| 5.5 | Control panel | Controller display, power switch and status indicators |
| 5.6 | Mechanical room | Refrigeration unit, water tray, drain hole
Condensing fan, condenser air inlet, water tank |
| 5.7 | Electrical cabinet | IO board, transformer, ballast, intermediate relay, time relay, solid state relay, AC contactor, thermal relay, fuse, air switch |
| 5.8 | Heating | 1. Nickel-chromium alloy electric heating wire heater
2. Heater control mode: non-contact equal cycle pulse width modulation, SSR (solid state relay) |
| 5.9 | Humidifier | 1. External detachable boiler humidification method
2. Stainless steel armored heater
3. Heater control mode: non-contact equal cycle pulse width modulation, SSR (solid state relay)
4. Water level control device, heater anti-dry device, sediment collection device, liquid level observation window |
| 5.10 | Water circulation | 1. Supply water tank , with high and low water level indication, detachable for cleaning
2. High-efficiency electromagnetic extrusion water pump, which can run 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 burning + ultra-low water level protection + water supply overtime to ensure safe operation of equipment |
| 5.11 | Power cord /drainage hole | On the back of the chamber |
- Cooling system
|
| 6.1 | Working mode | two-stage compression |
| 6.2 | Compressor | Fully enclosed low noise rotary compressor |
| 6.3 | Evaporator | Finned tube heat exchanger (also used as dehumidifier) |
| 6.4 | Condenser | Air-cooled: finned tube heat exchanger. |
| 6.5 | Throttling device | Expansion valve + capillary |
| 6.6 | Plate heat exchanger | Stainless steel brazed plate heat exchanger |
| 6.7 | Cooling control method | 1. The control system automatically adjusts the best energy-saving working condition of the refrigerator according to the test conditions
2. The cooling capacity of the evaporator is switched by the solenoid valve driven by the control system
3. Compressor return air cooling circuit |
| 6.8 | Refrigerant | R404a/R23 (ozone depletion index is 0, R23 is used for cascade refrigeration system) |
- Control system
|
| 7.1 | controller | |
| 7.2 | Running mode | Programmable/constant |
| 7.3 | Setting | English/Chinese, tough screen input |
| 7.4 | Program | 1. Program: maximum 10 groups
2. Number of segments: maximum 120 segments
3. The number of cycles: the maximum infinite cycle |
| 7.5 | Temp/humidity resolution | Temperature: 0.1ºC; Time: 1min; Humidity: 0.1%RH (temperature and humidity test equipment) |
| 7.6 | Control method | 1. Anti-integral saturation PID
2. BTC balanced temperature regulation 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 control + DEC intelligent electrical control (temperature and humidity test equipment) |
| 7.7 | Curve record | It has RAM with battery protection, which can save the set value, sampling value and sampling time of the device; the maximum recording time is 180 days (when the sampling period is 60S) |
| 7.8 | Other function | 1. Fault alarm and cause, processing prompt function
2. Power-off protection function
3. Upper and lower limit temperature protection function
4. Calendar timing function (automatic start and automatic stop operation)
5. Self-diagnosis function. |
| 7.9 | Temp/humidity sensor | Temperature: PT100 platinum thermal resistance
Humidity: Dry Wet Bulb Thermometer Method (Damp Heat Type Only) |
- Water supply system
|
| 8.1 | Water supply method | Pump lift/front drawer tank/50L |
| 8.2 | Water requirement | Resistivity ≥ 500Ω·m |
- Safety protection
|
| 9.1 | Cooling system | 1. The compressor is overheated
2. Compressor overcurrent
3. Compressor overpressure
4. The condensing fan is overheated |
| 9.2 | Humidifier | 1. Humidification heat pipe dry burning
2. Abnormal water level
3. Water supply overtime |
| 9.3 | Test chamber | 1. Adjustable over-temperature
2. Limit overtemperature of air conditioning channel
3. The fan motor is overheated |
| 9.4 | others | 1. Total power supply phase sequence and phase loss protection (applicable to three-phase power supply)
2. Overload and short circuit protection
3. Refrigeration system failure alarm protection caused by multiple door openings of the cabinet |
- Installation
|
| 10.1 | switch | NFB power switch |
| 10.2 | Installation place | 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 are no flammable, explosive, corrosive substances and dust around the equipment
5. Appropriate use and maintenance space should be left around the equipment, as shown in the figure below:
A: not less than 60cm B: not less than 120cm C: not less than 60cm D: not less than 120cm |
| 10.3 | Environmental condition | 1. Temperature: 5ºC~35ºC
2. Relative humidity: ≤85%
3. Air pressure: 86kPa~106kPa |
| 10.4 | Water requirement
(Only for damp heat equipment with pure water machine) | Flow ≥200kg/h, pressure 0.1MPa~0.25MPa
Tap water complies with GB 5749-1985 Hygienic Standard for Drinking Water
Note: The pure water machine is equipped with DN15 internal thread connector |
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