3375L Temperature Humidity Control Walk In Environmental Test
Chamber Complied Standards & Clauses
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
| 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 | | 2.1 Nominal content volume | 3375L | | 2.2 Inner chamber size | D(1500)mm ×W(1500)mm× H(1500)mm | | 2.3 External dimensions | Approx. D(1750)mm ×W(2950)mm× H(2250)mm | | 2.4 Weight | Approx. 850KG | | 3. Performance | | 3.1 Temperature range | Temperature range:20 ℃～+120℃ | | 3.2 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 | | 3.3 Temperature fluctuation | ≤±0.5℃ (The temperature fluctuation is half of the difference
between the measured maximum temperature and the minimum
temperature at the center point) | | 3.4 Temperature uniformity | ±2.0℃ (Temperature uniformity is the arithmetic mean of the
difference between the highest and lowest temperature measured in
each test) | | 3.5 Temperature error | ±2.0℃ | | 3.6 Heating time | ≥3℃/min (Non-linear no-load) | | 3.7 Cooling time | ≥1℃-1.2℃ /min (Non-linear no-load) | 3.8 Relative humidity error
(Damp heat only) | ±3%RH | 3.9 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 | 4.1 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 | | 4.2 Air duct parts | Centrifugal fan; the air outlet can adjust the air volume, height
and return air volume | | 4.3 Door | Double open hinged door, adopts reaction-free grip handle, equipped
with observation window, lighting lamp, window/door frame
anti-condensation electric heating device, door opening size:
(approximately) 1.5*1.5M | | 4.4 Observation window | There are two conductive film explosion-proof tempered glass
observation windows on the door (with anti-condensation function)
380W×400H (mm) | | 4.5 Fan | Long axis centrifugal fan | | 4.6 Sample rack | Two built-in stainless steel adjustable movable tray racks | 4.7 Impeller | Use stainless steel impeller imported from Taiwan | | 4.8 Heater | Nickel-chromium alloy electric heater | 4.9 Refrigeration Compressor | French Tecumseh compressor | 4.10 Evaporator | Fin type evaporator | 4.11 Refrigerating method | Mechanical compressor cascade | 4.12 Cooling method | Air-cooling | 4.13Temperature control instrument | 7-inch smart LCD touch programmable controller | | 4.14 Lead hole | Φ50mm, 1pc, equipped with a special foam rubber plug (located on
the left side of the chamber) | 5. Heating, humidification and refrigeration systems and their
working principles | | 5.1 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 | | 5.2 Humidification system | Humidification method:
1. Stainless steel armored humidifier
2. Humidifier control mode: non-contact and other periodic pulse
width adjustment, SSR (solid state relay)
3. Water level control device, humidifier anti-dry burning device,
sediment collection device, liquid level observation window | | 5.3 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. | | 5.4 Features | The pipelines of the whole system are subjected to a 22kg leak
detection test | | The heating and cooling system is completely independent | | The system can prevent high temperature and high pressure air flow
back | | All refrigeration system action programs are completely controlled
by the microcomputer controller |
6. Regulation system | | 6.1 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.
| | 6.2 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. | 7. Program control system | 7.1 Controller | TH1200-A, 7 inch PLC LCD touch programmable controller | 7.2 Display accuracy | 0.01℃/ 0.1%RH | 7.3 Touch-type high-resolution screen | Arbitrary setting of fixed conditions, program conditions, and
setting of curing test name, serial number, etc. | 7.4 Time range can be set | 0—999H59min | | 7.5 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
sections, and part of the number of sections can be intercepted
arbitrarily to execute the cycle, or to perform cycle work of any
section or group. | | 7.6 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. | | 7.7 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. | | 7.8 Communication function | U disk interface, RS-232 interface, misoperation hardware lock (
LOCK), computer communication software is provided | 7.9 Setting | Settings and all conditions are automatically locked by
microcomputer | 7.10 Alarm | If an error occurs during setting or operation, a warning signal
will be provided | | 7.11 Output | The controller has a recording signal port output, which can be
connected to a temperature and humidity recorder and can output
recording curves | 7.12 Interface | Equipped with standard RS-232 communication interface, long
transmission distance, can be connected to PC for control and
recording. | 8. Safety protection device | | 8.1 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 | | 8.2 Test chamber | 1. Adjustable over temperature protection
2. Limit over-temperature protection of air conditioning channels
3. Fan motor overheat protection | | 8.3 Other protection | 1. Total power phase sequence and phase loss protection (for
three-phase power supply)
2. Overload and short circuit protection
3. The refrigeration system failure alarm protection caused by
multiple openings of the cabinet | 9. Conditions of use | The following conditions are guaranteed by the user | | 9.1 The installation site | 1. The ground is level and well ventilated
2.No strong vibration around the equipment
3.No strong electromagnetic field around the equipment
4.No flammable, explosive, corrosive substances and dust around the
equipment
5. Appropriate use and maintenance space is left around the
equipment, as shown below:
A:≥10cm B:≥30cm C:≥120cm D: ≥10cm E:≥40com | | 9.2 Environmental conditions | 1. Temperature: 5 ℃ ～ 35 ℃
2. Relative humidity: ≤85%
3. Air pressure: 86kPa ～ 106kPa | | 9.3 Power supply conditions | AC380V power requirements:
1. One five-core (three-phase four-wire + protective ground wire)
cable (about 4 meters long)
2. Voltage range: AC 380 V
3. Allowable frequency fluctuation range: (50 ± 0.5) Hz
4. The protective earth ground resistance is less than 4Ω
5. 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 | 9.4 Maximum current
Maximum power consumption | Imax≤32A Pmax≤12.5KW | | 9.5 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. |
Equipment Overview
This test chamber simulates the temperature and humidity changeable
environment for the products or materials. It is widely used in the
adaptability test of electrical, electronics, instrument and meter
and other product parts under high and low temperature and humid
environment during storage, transportation and usage, to determine
the temperature adaptability of the above products or materials to
high and low temperature and humid environment, especially for
product electrification changes in performance and mechanical
properties. Features: 1. The test system has advanced and reasonable structural design,
standardized manufacturing process, beautiful appearance and
generous appearance.
2. The main functional components of the test chamber are world
famous branded ones. The test chamber has best control of noise and
energy saving.
3. The matching of components and assembly is good. The main
functional components are imported from the internationally branded
companies, which improves the safety and reliability of the test
chamber, and can ensure the long-term, high-frequency usage purposes.
4. The equipment has good operability, maintainability, good
temperature stability and durability, good safety performance. It does not pollute the
environment and endanger human health. Electrical control system
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