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IEC60068-2-78 -70℃ Cold Balanced Constant Temperature and Humidity Test Chamber 1000L

Product Details:

Place of Origin: China
Brand Name: Sinuo
Certification: Calibration Certificate (Cost Additional)
Model Number: SN881B-1000L

Payment & Shipping Terms:

Minimum Order Quantity: 1
Packaging Details: Export packing
Delivery Time: 30 days
Payment Terms: T/T
Supply Ability: 10 Sets Per Month
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Detail Information

Temperature Fluctuation: ±0.5℃ Humidity Fluctuation: ≤2.5%
Temperature Deviation: ≤±2.0℃ Humidity Deviation: ≤±3%
Internal Dimensions: W1000* H1000*D1000mm External Dimensions: W1250* H2150*D2100mm
Heating Time: No Load Average 2~3℃/min Cooling Time: No Load Average 0.7~1℃/min
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IEC60068-2-78 Humidity Test Chamber


1000L Humidity Test Chamber

Product Description



IEC60068-2-78 -70℃ Cold Balanced Constant Temperature and Humidity Test Chamber 1000L


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”

IEC60068-2-78:2012 “Environmental Testing-Part 2-78: Tests-Test Cab: Damp heat, steady state, IDT”

IEC60068-2-30:2005 “Environmental Testing-Part 2-30: Tests-Test Db: Damp heat, cyclic (12h+12h cycle), IDT”


Product Overview


Cold Balanced Touch Intelligent Programmable Temperature Controller (Power Saving Control)

This test equipment prohibits:

1.Testing or storage of flammable, explosive and volatile substance samples

2.Testing or storage of corrosive substance samples

3.Testing or storage of biological samples

4.Testing or storage of samples from strong electromagnetic emission sources

Test environment conditions: When the ambient temperature is +25℃, relative humidity ≤85%, and there is no sample in the test chamber


Technical Parameters


Product name Programmable constant temperature and humidity test chamber
Product model SN881B-1000L
Volume, dimensions and weight
Nominal internal volume 1000L
Weight About 560kg
Temperature range -70℃→+150℃
Humidity range


(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;


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

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


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℃



IEC60068-2-78 -70℃ Cold Balanced Constant Temperature and Humidity Test Chamber 1000L 0IEC60068-2-78 -70℃ Cold Balanced Constant Temperature and Humidity Test Chamber 1000L 1




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