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1.Description:
The thermal conductivity of materials is an important parameter for
studying the thermal physical properties of materials. This
instrument adopts the principle of the heat shielding plate method,
meeting the high-precision testing requirements for material
thermal conductivity of the material testing research
departments.The instrument is composed of a high-precision voltage
stabilizing power supply, a temperature measuring instrument, a
central calorimeter heater, a heat protection plate heater, a
constant temperature water bath, and a computer testing system.
1. Test head components: calorimetric plate, heat protection plate,
cold plate.
2. Heating system: Heat insulation plate temperature heater and
metering power heater.
3. Temperature control of cold plates: Constant temperature water
bath.
4. Temperature measurement system: Utilizes digital high-precision
instruments to ensure accuracy and stability, and enables internal
compensation for the zero point.
5. The power measurement is carried out using a high-precision
regulated power supply for heating, with an accuracy better than
0.1%.
6. Computer test components: Computers, communication components
and test software.
DRH-ZD-400 features automatic pressure application and automatic
thickness measurement functions. It can measure the thermal
conductivity and thermal resistance under different pressure
conditions, and is highly suitable for materials with
compressibility:
a. Use high-precision displacement sensors and connect them to a
computer for automatic thickness measurement. The measurement range
is 0 - 80mm, with a resolution of 0.01mm.
b. It can automatically apply pressure to measure the thermal
conductivity under different pressure conditions. The pressure
range can be adjusted from 0 to 1000N, with a resolution of 0.1N.
2.Standard
GB/T3399 "Test Method for Thermal Conductivity of Plastics -
Thermal Shield Plate Method", GB/T3139-2005 (Test Method for
Thermal Conductivity of Fiber Reinforced Plastics) (Test Method for
Thermal Conductivity of Fiberglass Reinforced Plastics),
GB/10294-2008 "Determination of Steady-State Thermal Resistance and
Related Properties of Insulation Materials - Protective Heat Plate
Method", etc. The main tests include plastics, glass, fibers,
foams, insulation materials, etc. It is widely used in large and
medium-sized colleges, research institutions, quality inspection
departments and production plants for material analysis and
testing.
3.Feature:
1. Automatic thickness measurement: Utilizing high-precision
displacement sensors for measurement and connecting to a computer
for automatic thickness measurement, thereby reducing human error.
2. Automatic Pressurization System: The system automatically
applies pressure. It enables the measurement of thermal
conductivity under various pressure conditions. This method is more
scientific, data-driven, and has higher repeatability compared to
manual pressure application.
3. Various measurement types: In addition to measuring hard plates,
by selecting various accessories from the company, it is possible
to measure a wide range of special materials. For example: granular
materials, loose materials, soil, etc.
4.Technical Parameter.
| Thermal Conductivity Range | 0.0010~3.0000 W/(m·K) (4 decimal places display) | 
| Measurement Accuracy | ≤ ±3% | 
| Hot Surface Temperature | |
| • Range | Room Temperature ~ 95°C | 
| • Resolution | 0.01°C | 
| Cold Surface Temperature | |
| • Range | 0 ~ 60°C | 
| • Resolution | 0.01°C | 
| • Control Method | Constant Temperature Bath | 
| Power Supply | 220V/50Hz; Power ≤ 2kW | 
| Calorimetric Power Supply | |
| • Voltage | 0-30V, Resolution: 0.0001V | 
| • Current | 0-3A, Resolution: 0.0001A | 
| Automation System | Computer-controlled testing with data printout | 
| Sample Dimensions | 400 × 400 × (5-80) mm | 
