Programmable High-Low Temperature and Humidity Environmental Testing Chamber

I. Use of products

The product is suitable for investigating the moisture resistance of electrical and electronic products, components, components and their materials under different temperature and humidity conditions, and can also be used as an adaptive test for storage, transportation and use in high and low temperature.

II. Technical parameters

1. Temperature range :-70℃~150℃(D);

2. Humidity range :30%～98% R.H(temperature range25℃～98℃);

3. Temperature uniformity :≤±2℃(no load);

4. Humidity uniformity :+2-3% R.H;

5. Temperature fluctuation :≤±0.5℃(space load);

6. Humidity :±2%;

7. Temperature deviation :≤±2℃;

8. Humidity deviation :≤±2%;

9. Heating rate :1.0~3.0℃/ min;

10. Time frame :0~999 hours;

11. Supply voltage :380 V±10 per cent;

III. Box structure

1. The whole box adopts integral structure.

2. The inner side of box is made of 1.0 mm SUS304B stainless steel plate, the outer side is made of 1.0 mm cold rolled steel plate

The temperature material adopts super fine glass insulation cotton.

3. Door seal using double-layer silicone rubber sealing material.

4. Observation window is multi-layer conductive film toughened insulating glass, size 250×260 mm to prevent low temperature glass frosted, specially built-in heating wire surround, and equipped with lighting for observation.

5. Provided with φ50mm test hole with stopper on the side of the box. The stopper material is silicone rubber with low foaming ability

High and low temperature, both heat preservation efficiency.

An air-regulating cabinet is

6. Installed on the rear side of the box studio, in which the evaporator, electric heater, electric heater, and Humidifier, fan, fan volute and other equipment.

7. The temperature sensor to the outlet.

8. Air supply mode in the test box is up air supply and down air return mode.

IV. Heating and humidifying systems

1. heater adopts porcelain frame nickel chromium wire electric heater, this heater has little thermal inertia and long life. From instrumentation

A controllable pulse duty cycle PID signal is produced, which is controlled by solid state relay, and the control is stable and reliable.

2. steam boiler electric heating humidification method, armored electric heating pipe, PID control mode, use contactless cycle

During pulse broadening SSR( solid state relay) control, with water level control device, heater to prevent dry burning Device

V. CONTROL SYSTEMS

1. Temperature controller: LCD touch screen temperature and humidity controller

2. Sensor: PT100 temperature sensor.

3. Control of heating output using solid state relay zero-crossing trigger to reduce noise, reduce pollution, convenient dimension

repair, improve the control accuracy.

4. In the control system need to be equipped with security measures, including: lack of phase protection, phase sequence error protection, phase

Voltage uneven protection, fan overload protection, overtemperature power off protection, leakage protection and so on.

5. Control system is provided with user-friendly operating panel, located in the upper left of the test box, with power supply, lighting

and each function operation key and fault indicator light.

6. An independent overtemperature protector is provided in the system in addition to the main controller, even if the main controller is out

In case of failure, the overtemperature protector can also reliably disconnect the heating power to protect the safety of the equipment and test.

7. Provided with an interlocking device in the electrical control system to heat and add when the circulating fan is not started or overloaded the wet system can not start.