ZL-3044C Thermal Conductivity Tester (Transient plane heat source method)

Introduction:

ZL-3044C is a thermal conductivity tester developed by using transient plane heat source technology (TPS), which can be used to test the thermal conductivity of different types of materials. Transient plane heat source method is one of the latest methods to study heat conduction performance, which makes the measurement technology reach a new level. The thermal conductivity can be measured quickly and accurately when studying materials, which provides great convenience for enterprise quality control, material production and laboratory research. The instrument is easy to operate and easy to understand. It will not damage the sample.

Working principle:

Transient plane heat source (TPS) is a new method for measuring thermal conductivity, which was developed by Professor Silas Gustafsson of Chalmer University of technology in Sweden on the basis of hot wire method. The principle of measuring the thermophysical properties of materials is based on the transient temperature response produced by the step heating disk heat source in infinite medium. A planar probe made of thermal resistance material is used as heat source and temperature sensor at the same time. The relationship between thermal resistance coefficient temperature and resistance is linear, that is, the heat loss can be known by understanding the change of resistance, which reflects the thermal conductivity of the sample.The probe in this method is a continuous double helix structure sheet formed by etching conductive alloy. The outer layer is a double-layer insulation protection layer with very thin thickness, which makes the probe have a certain mechanical strength and maintain the electrical insulation between the probe and the sample. During the test, the probe is placed in the middle of the sample for testing. When the current passes through the probe, a certain temperature rise is generated, and the heat generated diffuses to the samples on both sides of the probe at the same time. The speed of thermal diffusion depends on the thermal conductivity of the material. By recording the temperature and the response time of the probe, the thermal conductivity can be directly obtained from the mathematical model.

Test object:

Metals, ceramics, alloys, ores, polymers, composite materials, paper, fabrics, foamed plastics (surface insulation materials, sheets), mineral wool, cement wall, glass reinforced composite board CRC, cement polystyrene board, sandwich concrete, FRP panel composite sheet, paper honeycomb, panel, colloid, liquid, powder, granular and paste solid, etc., are widely tested.

Instrument features:

1. Reference standard:ISO 22007-2 2008
2. The test range is wide and the test performance is stable. It is in the leading level among similar domestic instruments;
3. Direct measurement, test time 5-160s can be set, can quickly and accurately measure the thermal conductivity, saving a lot of time;
4. It will not be affected by contact thermal resistance as static method;
5. No special sample preparation is needed, and the shape of the sample is not required;
6. Nondestructive testing of samples means that the samples can be reused;
7. The probe is designed with double helix structure. Combined with the exclusive mathematical model, the core algorithm is used to analyze and calculate the data collected on the probe;
8. The structure of the sample table is ingenious and easy to operate. It is suitable for placing samples of different thickness, and it is simple and beautiful at the same time;
9. The imported data acquisition chip is used in the data acquisition of the probe. The high resolution of the chip can make the test results more accurate and reliable;
10. ARM microprocessor is used in the control system of the host computer, and the calculation speed is faster than that of the traditional microprocessor, which improves the analysis and processing ability of the system, and the calculation results are more accurate;
11. The instrument can be used to measure the thermal physical parameters of block solid, paste solid, granular solid, colloid, liquid, powder, coating, film, thermal insulation material, etc;
12. Intelligent man-machine interface, color LCD display, touch screen control, easy to operate;
13. Powerful data processing ability. Highly automated computer data communication and report processing system.

Main Technical Parameters:

Note: Probe No. 1 measures thinner low-conductivity materials, Probe No. 2 is a conventional general-purpose probe, and Probe No. 3 measures higher-conductivity materials with a larger thermal conductivity. If the surface of the sample to be measured is smooth and sticky, the samples can be stacked.

Compared with other methods, it is faster, simpler and more comprehensive: