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

(20～98)%RH

(Temperature: 20℃～85℃, refer to the temperature and humidity controllable range chart, no active heat load)

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.

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.

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

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).

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

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).

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.

1. The throttling devices adopt imported Chiming refrigeration accessories.

2. The condenser and evaporator adopt AC&R double spoiler type aluminum fin device.

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.

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.

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)

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.

Compressor overheating

Compressor overflow

Compressor overpressure

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

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.