IEC 60068-2-78 Six Zones Independent Control Type Humidity Heat Test Chamber

Brief Introduction:

The 6-Zones High and Low Temperature Humidity Heat Test Chamber meets the standard requirements:

IEC60068-2-2:2007 Environmental testing - Part 2-2: Tests - Test B: Dry heat

IEC60068-2-78:2007 Environmental testing - Part 2-78: Tests-Test Cab: Damp heat, steady state

IEC60068-2-1:2007 Environmental testing - Part 2-1: Tests - Test A: Cold

GJB150.4-1986 Low temperature test

GJB150.3-1986 High temperature test

Technical parameters:

Temperature range:

Chamber type ① : -40℃ ~ 150℃ (temperature range adjustment)

Chamber type ② : -40℃ ~ 150℃ (temperature range adjustment)

Chamber type ③ : -60℃ ~ 150℃ (temperature range adjustment)

Chamber type ④ : -60℃ ~ 150℃ (temperature range adjustment)

Chamber type ⑤ : -40℃ ~ 150℃ (temperature range adjustment)

Chamber type ⑥ : -40℃ ~ 150℃ (temperature range adjustment)

Humidity range:

Chamber type ① : 30% ~ 98%RH (temperature range adjustment)

Chamber type ② : 30% ~ 98%RH (temperature range adjustment)

Chamber type 3:30% ~ 98%RH (temperature range adjustment)

Chamber type ④ : 30% ~ 98%RH (temperature range adjustment)

Chamber type ⑤ : 20% ~ 98%RH (temperature range adjustment)

Chamber type ⑥ : 20% ~ 98%RH (temperature range adjustment)

Temperature fluctuation: ≤0.5°C

Temperature deviation: ≤±2℃

Temperature uniformity: ≤2℃

Temperature change rate (the average value of the whole process measured at an ambient temperature of 20±2°C)

Heating rate: ≥3℃/min (electric heating)

Cooling rate: ≥1℃℃/min (mechanical refrigeration)

Installed power: about 18.5KW.

Noise: ≤ 70db(A), in a silent room, measured at 1 meter in front of the test box

COOLING SYSTEM

This equipment is mechanically cooled by a monopolar system. It is realized by an advanced hermetic compressor.

Refrigeration method: single-stage mechanical compressor

It adopts the cold end PID adjustment technology, which can achieve the effect of temperature control through the accurate output of the compressor cooling capacity. The whole process of cooling and maintaining the temperature below normal temperature does not require the participation of the heater, which is completely different from the balance temperature control method of cold and heat, which means the energy saving more than 30%.

This equipment uses the environmentally friendly refrigerant R404A (CFC free) not prohibited by the Montreal Convention or the London Amendments and new US EPA laws. Cooling method: air cooling

Refrigeration auxiliary parts: The main refrigeration parts are imported, such as thermal expansion valve and pressure controller from Danfoss Company in Denmark; filter and oil separator from EMERSON Company in the United States; solenoid valve from Castel in Italy.

Refrigeration Control Checklist

AIR ADJUSTABLE SYSTEM

Air circulation device: built-in air conditioning room, circulating air duct and long axis fan. By improving the blast airflow of the air, the air flow, heating and cooling capacity are increased, and the temperature uniformity of the test chamber is greatly improved.

Air cooling method: multi-stage membrane air heat exchanger

Heating method: high-quality nickel-chromium alloy wire electric heater. (Using non-contact solid state relay control)

CONSTRUCTIVE MAIN FEATURES

Structure: the whole box adopts integral type

Material: The inner tank is imported & 1.0mm SUS304 stainless steel plate; the outer shell & 1.0mm steel plate are sprayed with plastic.

Insulation layer: high-density polyurethane foam board + glass wool, with high strength and non-flammable, non-depositing properties.

Shelf load bearing: 30kg/piece, (a total of 1 stainless steel partition)

Cable Test Holes: None.

Configuration:

The lower part of the air conditioning unit is provided with a water outlet.

The door lock is on the right side of the box, with a fully open single wing, with a silicone rubber seal (not easy to age and harden).

1x35W light, with protective cover and control switch on the control panel outside the box.

There is a gas handling unit on the rear wall of the box.

Components of the gas handling unit:

1. cooling evaporator
2. Heating system
3. Thermally Regulated Air Circulation Fan
4. Temperature Sensor
5. The flow of thermally conditioned air passes through the various elements mentioned above before entering the test chamber.
6. Heating System: High Efficiency Nichrome Electronic Heater Protected by Adjustable Fail/Safe Thermostat Disconnect Switch.
7. Internal airflow regulation: through the action of high-power centrifugal fans, forced air circulation can achieve good temperature uniformity
8. Airflow Control System: Long-axis motor-driven air supply

Security Measures

Safe and reliable grounding protection device;

Power supply overvoltage and undervoltage, phase loss, phase error protection;

Independent studio over temperature protection;

Heater short circuit/overload protection;

Refrigerator overpressure/overload protection;

Blower motor overload protection;

Control line overcurrent protection, leakage protection and automatic cut-off.

Control System