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[China]
Trade Verify
Address: Room 101, 1st Floor, No. 6, Third Street, Pingshan Industrial Zone, Shibi Street, Panyu District, Guangzhou, China
Contact name:Zoe Zou
Sinuo Testing Equipment Co. , Limited |
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Verified Suppliers
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High Low Temperature Humidity Environmental Test Chamber with R448a Refrigerant
Complied Standards
IEC60068-2-1:2007 “Environmental Testing-Part 2-1: Tests-Test A: Cold, IDT”
IEC60068-2-2:2007 “Environmental Testing-Part 2-1: Tests- Test B-Dry heat, IDT”
IEC60068-2-30:2005 “Environmental Testing-Part 2-30: Tests-Test Db: Damp heat, cyclic (12h+12h cycle) , IDT”
IEC60068-2-78:2012 “Environmental Testing-Part 2-78: Tests-Test Cab: Damp heat, steady state, IDT”
Technical Parameters
Countries such as Canada and the United States have relatively high requirements for the use of refrigerants. Refrigerants such as R404a are not allowed to be used, and require the use of more environmentally friendly R448a & R 508b, so we quit this type of constant temperature and humidity chamber to meet local environmental protection policies:
| 1. Sample limitation | This test chamber prohibits: Testing or storage of flammable, explosive, and volatile substance samples Testing or storage of samples of corrosive substances Testing or storage of biological samples Testing or storage of strong electromagnetic emission source samples Testing or storage of radioactive material samples Test or storage of highly toxic substance samples Testing or storage of samples that may produce flammable, explosive, volatile, highly toxic, corrosive and radioactive materials during testing or storage | ||
| 2. Volume, size and weight | |||
| Nominal content volume | 1200L | ||
| Inner chamber size | W(1000) mm *D (1000) mm* H (1200) mm | ||
| External dimensions | Approx. W (1450) mm *D (1250) mm* H (2050) mm (excluding top motor part) | ||
| Weight | Approx. 780KG | ||
| 3. Performance | |||
| Temperature range | Temperature range: -55 ℃～+100℃ | ||
| Humidity range | (25 ～ 98)% RH (refer to temperature and humidity controllable range chart, no active wet and heat load)
Temperature and humidity controllable range chart | ||
| Temperature fluctuation | ≤±0.5℃ (stable state) | ||
| Temperature uniformity | ≤2.0℃ (stable state) | ||
| Heating time | 3℃/ min (non-linear under no load) | ||
| Cooling time | 1℃/min (non-linear under no load) | ||
Relative humidity error (Damp heat only) | ±3.0%RH | ||
| Temperature and humidity display accuracy | 0.01°C/0.1% RH | ||
| Live load handling capacity | 1000 Watts at +20°C; 800 Watts at 0°C; 500 Watts at -20°C; and 300 Watts at -40°C. | ||
| Working noise | Sound level≤85dB (Measured in a soundproof room with an ambient temperature of 25 ° C and low echo; using A weighting, the average value of 8 points is tested; each test point is 1 meter away from the noise source and 1 meter away from the ground) | ||
| 4. Structural characteristics | |||
| Material | 1. Outer wall material: Cold rolled steel plate, pickling and
phosphating advanced powder baking paint 2.Inner wall material: SUS304# stainless steel plate 3. Chamber insulation material: rigid polyurethane foam + glass fiber | ||
| Air duct parts | Centrifugal fan; the air outlet can adjust the air volume, height and return air volume | ||
| Door | Single open door, with handle-type non-reaction handle, the door is equipped with an observation window, lighting lamp, window/door frame anti-condensation electric heating device, door size: 1.0*1.2M | ||
| Observation window | The door is with one conductive film explosion-proof tempered glass observation window (with anti-condensation function), window size: 500W×600H (mm) | ||
| Fan | Long axis centrifugal fan | ||
| Sample rack | Two built-in stainless steel adjustable movable tray racks | ||
| Impeller | Use stainless steel impeller imported from Taiwan | ||
| Heater | Nickel-chromium alloy electric heater | ||
| Refrigeration Compressor | French Tecumseh compressor | ||
| Evaporator | Fin type evaporator | ||
| Refrigerating method | Mechanical compressor cascade | ||
| Cooling method | Air-cooling | ||
| Temperature control instrument | 7-inch smart LCD touch programmable controller | ||
| Lead hole | Φ50mm, 2 pcs, each one is equipped with a special foam rubber plug (located on the left side of the chamber) | ||
| Removable shelves | 2 sets, each can hold a minimum of 20 kgs | ||
| 5. Heating, humidification and refrigeration systems and their working principles | |||
| Heating system | Stainless steel sleeve type anti-dry heating tube built-in nickel-chromium alloy heating wire | ||
| U-shaped fin type stainless steel high-speed heating electric heater is used for heating | |||
| Completely independent system, does not affect the control circuit | |||
| Humidification system | Humidify method: 1. External detachable boiler humidification method or built-in water tank humidification 2. Stainless steel armored humidifier 3. Humidifier control mode: non-contact equal period pulse width adjustment, SSR (solid state relay) 4. Water level control device, humidifier anti-dry burning device, sediment collection device, liquid level observation window 5. Humidifier power: 6KW Humidifier: 1. Automatic water supply device or push-button electric automatic water replenishment 2. RO membrane + activated carbon water supply filter, removable for cleaning 3. High and low temperature double water level electronic liquid level switch to prevent mis-operation 4. Water shortage and empty heating and over-temperature protection + ultra-low water level protection + water supply over-time protection to ensure the safe operation of the equipment | ||
| Refrigeration system | Cooling method: air-cooling | ||
| Refrigeration compressor: French Tecumseh compressor with environmentally friendly refrigerant | |||
| Refrigerant copper tube: inner spiral K-TYPE refrigerant copper tube | |||
| Condenser: wave-shaped fin type air-cooled condenser | |||
| Evaporator: Slope type FIN—TUBE evaporator | |||
| Freezing element: Original imported solenoid valve, drying filter, etc. | |||
| Refrigerant: R448a & R 508b | |||
| Features | The pipelines of the whole system are subjected to a 22kg leak detection test | ||
| The heating and cooling system is completely independent | |||
| Equipped with the company's professional technical characteristics, it can prevent the high temperature and high-pressure airflow from returning to the cooling machine and damage the system. | |||
| All refrigeration system action programs are completely controlled by the microcomputer controller | |||
| 6. Electrical control system | |||
| Name | Brand | Remark | |
Compressor
| Tecumseh, France |
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| Pressure relays | Denmark DANFOSS Or America EMERSON |
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| Evaporating pressure regulator | Denmark DANFOSS |  | |
| Filter drier | Denmark DANFOSS Or America EMERSON |
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| Throttling device | Capillary or expansion valve |  | |
| Solenoid valve | Japan SAGLNOMIYA or Italy CASTEL or America EMERSON |
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| Expansion valve | Denmark DANFOSS |
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| 7. Regulation system | |||
| Regulation method | Forced circulation ventilation, balance temperature regulation method. The control system controls the output of the heater through the PID automatic calculation output according to the temperature point set by the system, and finally reaches a dynamic balance.
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| Circulation device | The built-in air-conditioning room, circulating air duct and long axial flow fan can improve the air flow and heating capacity by improving the air flow, and greatly improve the temperature uniformity of the test chamber. | ||
| 8. Program control system | |||
| Controller | 7 inch smart LCD touch programmable controller | ||
| Touch-type high-resolution screen | Arbitrary setting of fixed conditions, program conditions, and setting of curing test name, serial number, etc. | ||
| Time range can be set | 0—999H59min | ||
| Programmable mode | At the same time, 120 groups of programs with different conditions can be set. In any group of programs, it can be divided into 1200 segments, and part of the number of segments can be intercepted arbitrarily to execute the cycle, or to perform cycle work of any section or group. | ||
| Safety | It has a power-off memory device, which can continue to execute the remaining programs when the power is restored, and can be used as a machine appointment to execute the startup and machine running time. | ||
| Control | The temperature rise and fall can be used for slope control, curve control, and have the function of self-correcting temperature and humidity reference points. It has the function of PID automatic calculation, which can reduce the convenience caused by manual setting. | ||
| Communication function | U disk interface, RS-232 interface, misoperation hardware lock (LOCK), computer communication software is provided | ||
| Setting | Settings and all conditions are automatically locked by microcomputer | ||
| Alarm | If an error occurs during setting or operation, a warning signal will be provided | ||
| Output | The controller has a recording signal port output, which can be connected to a temperature and humidity recorder and can output recording curves | ||
| Interface | Equipped with standard RS-232 communication interface, long transmission distance, can be connected to PC for control and recording. | ||
| 9. Safety protection device | |||
| Refrigeration system | 1. Compressor overheating protection 2. Compressor overcurrent protection 3. Compressor high- and low-pressure protection 4. Compressor oil pressure protection (optional for large semi-hermetic compressors) 5. Over-temperature protection for liquid supply temperature 6. Ultra-high pressure relief protection 7. Air-cooled: condensing fan overheated protection | ||
| Test chamber | 1. Adjustable over temperature protection 2. Limit over-temperature protection of air conditioning channels 3. Fan motor overheat protection | ||
| Other protection | 1. Total power 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 openings of the box | ||
| 10. Conditions of use (The following conditions are guaranteed by the user) | |||
| The installation site | 1. The ground is level and well ventilated
A:≥40cm B:≥150cm C:≥100cm D: ≥60cm E:≥40com | ||
| Environmental conditions | 1. Temperature: 5 ℃ ～ 35 ℃ 2. Relative humidity: ≤85% 3. Air pressure: 86kPa ～ 106kPa | ||
| Power supply conditions | Power supply requirements: 1. Come with a 20KVA AC Frequency Power to achieve the test chamber to work under input of 208V to 230V, Phase: 3 phase, Frequency: 60Hz 2. The protective earth ground resistance is less than 4Ω 3. The user is required to configure the equipment with an air or power switch of the corresponding capacity at the installation site, and this switch must be independently used by the device | ||
| Maximum current Maximum power consumption | Imax ≤ 32A Pmax ≤ 15KW | ||
| Others | Opening the door of the test chamber during the test will cause temperature and humidity fluctuations in the chamber; if the door is opened multiple times or is left open for a long time or the test sample emits moisture during the test, the refrigeration system heat exchanger may freeze and does not work. | ||
What is the advantages of this kind of environmental chamber?
Our this kind of environmental friendly test chambers adopt R448a & R 508b refrigeant.
Countries such as Canada and the United States have relatively high requirements for the use of refrigerants. Refrigerants such as R404a are not allowed to be used, and more environmentally friendly R448a & R 508b are required. Therefore, we launch this type of constant temperature and humidity chamber to meet clients' local environmental protection policies.
Picture for Reference
