| Product name | Programmable constant temperature and humidity test chamber |
| Product model | SN881B-1000L |
| Volume, dimensions and weight |
| Nominal internal volume | 1000L |
| Weight | About 560kg |
| Performance |
| Temperature range | -70℃→+150℃ |
| Humidity range | (20～98)%RH (Temperature: 20℃～85℃, refer to the temperature and humidity
controllable range chart, no active heat load) |
| Temperature fluctuation | ±0.5℃ |
| Humidity fluctuation | ≤2.5% |
| Temperature deviation | ≤±2.0℃ |
| Humidity deviation | ≤±3% |
| Heating time | No load average 2～3℃/min |
| Cooling time | No load average 0.7～1℃/min |
| Load conditions | none |
| Work noise | A weighting is used to test the average of 9 points; each
test point is 1 meter away from the noise source horizontally and 1
meter above the ground.) A sound level≤70dB(A) (Measured in a soundproof room with an ambient temperature of 25°C
and low echo; |
| Structure |
Insulated building envelope | 1.Box insulation material: 100mm high temperature resistant rigid
polyurethane foam. 2. Door insulation material: 100mm high temperature resistant rigid
polyurethane foam. 3. Outer wall material: A3 board spraying 4. Inner wall material: Brushed stainless steel plate SUS﹟304. |
| Bottom structural strength | The heavy capacity of the track at the bottom of the test chamber:
≤100Kg/m² (load) |
| Air conditioning channel | 1. Fan, heater, evaporator (also dehumidifier), drainage device,
pressure balance port, adjustable air guide plate, temperature
sensor 2. Stainless steel long-axis centrifugal fans: 4 units/90W. |
| Standard configuration of test chamber | 1. Energy-saving lamps in the box: LED energy-saving lamps 2. Flat embedded handle, 3. Lead hole: φ50mm 1 piece 4. Window 400x600x40mm 3-layer vacuum tempered glass. 5. Door hinge: SUS #304 imported hinge |
| Box door | 1. Equipped with a safety door locking mechanism (the door can be
opened in the test room), the door is equipped with electric heat
to prevent condensation, and the viewing range of the insulating
glass observation window is approximately (W400×H600mm). Electric
heating device to prevent condensation on door frame 2. The single-piece door opens outwards, with the hinge on the left
and the handle on the right (when facing the front of the box). |
| Control Panel | The controller is a 600 7-inch display screen, temperature
(humidity) control display screen, operating indicator light, and
lighting button |
| Mechanical room | Refrigeration unit, compressor water tray, pressure relief device,
heating device |
| Distribution Cabinet | Distribution board, cooling fan, main power switch, transformer,
intermediate relay, time relay, solid state relay, AC contactor,
circuit breaker |
| Heater | 1.Heating power: about 4KW 2. Heating control method: SSR (Solid State Relay) contactless
equal period pulse width modulation 3.Fin-type heat pipe-shaped stainless steel electric heater |
| Power cord hole | Located on the back of the box |
| Cooling System |
| Hot and cold equipment | 1. Cooling method: air cooling 2. Hitachi or Emerson low-temperature and low-noise vortex
ultra-low temperature refrigeration system (air-cooled heat
dissipation method). |
| Hot and cold exchange device | Two-stage refrigeration system Hitachi or Emerson low-noise scroll
compressor. Adopting ultra-high efficiency SWEP cold coal heat and
cold exchange design [made in Sweden (sus#316)], it is more
efficient than the traditional internal spiral type. |
| Heating load regulation | 1. Compared with the traditional design, the control stability and
reproducibility are higher, and it achieves super efficiency of
saving power and saving more energy. 2. Adopt automatic adjustment of cold coal flow device to
effectively take away the heating load of the product to be tested
and German/Japanese technology Technological synchronization. |
| Refrigeration Compressors | Hitachi or Emerson |
| High efficiency components | 1. The throttling devices adopt imported Chiming refrigeration
accessories. 2. The condenser and evaporator adopt AC&R double spoiler type
aluminum fin device. |
| Expansion system | Capacity controlled refrigeration system (capillary tube). |
| Evaporative condenser | All copper tube heat exchanger. |
| Refrigerator control method | 1. The refrigeration system is designed with vibration and noise
reduction measures such as shock absorber tubes. 2. Compressor return air cooling circuit 3. Evaporation pressure regulating valve. 4. The controller of the control system automatically adjusts the
operating conditions of the refrigeration compressor according to
the test conditions, and can control the output cooling capacity to
achieve the principle of power saving. |
| Refrigerant | Honeywell R404a (ozone depletion index is 0) |
| Electrical control system |
| Controller model | Cold Balanced Touch Intelligent Programmable Temperature Controller
(Power Saving Control) |
| Controller technical parameters | Temperature and humidity input signal dry and wet bulb PT100x2. Resolution: temperature ±0.01℃, humidity ±0.1%R.H. It has upper and lower limit standby and alarm functions. 9 sets of P.I.D control parameter settings, P.I.D automatic
calculation. Dry and wet bulb automatic correction screen Accuracy: temperature ±0.1℃＋1digit, humidity ±1%R.H＋1digit Temperature slope: 0.1~9.9 can be set. |
| Control method | 1. BTHC balanced temperature and humidity control method + DCC
intelligent cooling capacity control + DEC intelligent electrical
control (temperature and humidity test equipment) 2. Anti-integral saturation PID 3. BTC balanced temperature control method + DCC intelligent
cooling capacity control + DEC intelligent electrical control
(temperature test equipment) |
| Screen display function | 1. It adopts screen conversation style, no key input is required,
and the options can be directly touched on the screen. 2. Temperature set (SV) and actual (PV) values are directly
displayed. 3. It can display the currently executing program number, segment,
remaining time and number of cycles. 4. Operation accumulated time function. 5. The temperature program setting value is displayed in a graphic
curve, with the function of real-time display of program curve
execution. 6. It has a separate program editing screen, and at least 5
segments of temperature, humidity and time can be input on each
page. 7.English can be switched at will. 8. The fault prompt screen is displayed. 9. The screen backlight can be adjusted. 10. The screen display protection function can be set to timer,
TIMER or manual shutdown. |
| Safety protection device |
| Cooling System | Compressor overheating Compressor overflow Compressor overpressure |
| Test chamber | Adjustable over-temperature protection device Air conditioning channel extreme overtemperature Fan motor overheated |
| Other | Leakage Protection Heating tube no air drying protection Overload and short circuit protection Power outage protection low water level protection |
| Other configurations |
| Sample main power leakage circuit breaker | AC380V, 50Hz, three-phase four-wire + protective ground wire. |
| Other special instructions |
| Power cable | 5-core (three-phase four-wire + protective ground wire) cable 4
meters, 1 piece (can be provided according to customer
requirements) |
| Lead hole | 1 lead hole with rubber plug, diameter φ50mm, its location and
quantity can be customized according to user requirements as long
as the box structure allows and does not affect performance. |
| Transportation | Car packaging and transportation |
| Conditions of Use | List the conditions |
| Environmental conditions | ① Temperature: 5℃～35℃ ②Relative humidity: ≤85% ③Air pressure:
86kPa～106kPa |
| Power supply conditions | AC380V three-phase four-wire + protective ground wire |
| Power supply | Allowable voltage fluctuation range: AC (380±10) V Allowable frequency fluctuation range: (50±0.5) Hz The grounding resistance of the protective ground wire is less than
4Ω The user is required to configure an air or power switch of
corresponding capacity for the equipment at the installation site,
and this switch must be independent for use by the equipment. |
| Battery capacity | About 11kW |
| Maximum current | 30A |
| Switch | 63A (molded case leakage protector) |
| Requirements for storage environment | When the equipment is not working, the ambient temperature should
be kept within 0℃~+45℃ |
