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Expansion coefficient tester

Release time:2020-07-26  Number of views:10150

 

Equipment introduction:

The NBD-TDA1200-45TI thermal expansion tester puts the sample under the control of a preset temperature program (rise/fall/constant temperature and its combination), and measures the change of the length of the sample in the test direction with temperature or time under the condition that the load force is negligible. It is used to accurately measure the expansion or contraction of materials during heat treatment, and is suitable for the testing of materials such as ceramics, building materials, glass, refractories, metals or alloys.


 

 


Configuration

(Model:NBD-TDA1200-45TI)

 

Equipment features:

1, automatic calculation of expansion coefficient, volume expansion coefficient, linear expansion, rapid thermal expansion;

2, automatically calculate the compensation factor and automatic compensation, but also manual correction (online);

3, automatically record, store, generate test report, USB interface export print temperature expansion coefficient curve;

4, the temperature interval is set freely, the small interval is 1℃.

5. All the operations of the machine are completed automatically, and report data is freely exported without another computer.

 

The NBD-101EP embedded operating system enables the following controls:

1. Input test information;

2. Automatic detection of test samples;

3. Automatically complete the sample test according to the process curve set by the customer

4. Record the data, and automatically generate reports, each data report package to generate files;

5. Customers can freely export the required files (reports and data) according to their needs.

 


dL/L0 curve map:

It reflects the linear expansion process of the bar sample material during the heating process and the phase transformation process at higher temperature.


 

Structure diagram:

The instrument can pass purge gas during the test, and the purge direction is to enter the right side and flow out from the middle after circulating in the pattern. There are three common inert purge atmospheres, N2, Ar and He, which are mainly designed to prevent the oxidation of the sample, and can also be used to bring out the gaseous products during the heating process, and prevent the polluting gases generated by the decomposition of some samples from polluting the furnace cavity, bracket and push rods. In terms of gas control accessories, conventional rotameters can be equipped as well as mass flowmeters (MFC). The gas outlet is located at the middle exhaust end of the furnace body, which can discharge the carrier gas and gaseous products to the medium and large, and can also be further connected to the gas analysis instrument for composition detection by using a heated transmission pipeline.

 

Pressure measurement and monitoring:

Mechanical pressure gauges with shock absorbing oil can prevent damage to the gauge pointer.

measuring mechanism

Vacuum degree: ≤5Pa (mechanical pump)

Electrical Spec.

AC220V   1.2KW

measuring range

RT—1100℃

Heating rate

0.1 to 30 ° C /min, the recommended heating rate ≤ 10 ° C /min

Temp. Accuracy

±1℃

Sample holder

High purity quartz (customizable corundum)

样品状态尺寸

Sample state: Solid diameter: Φ6~8mm±0.5mm Length: 25~50mm±1mm

样品长度测量

Automatic instrument measurement

试样测量环境

Air environment; Static, dynamic atmosphere environment; Or vacuum environment (≦1000℃) (optional vacuum system)

位移分辨率

1μm, automatic calibration range

系统测量误差

±0.1-0.5% repeatability error ≦± (0.1-0.2) *10e-6

气密性

0.231KPa/min

操作环境

NBD-101EP embedded operating system, one machine to do all, no external computer

操作过程

The whole test process is controlled automatically, the chart display is intuitive, and the test report is generated automatically.

Cautions 


1. Keep away from vibration sources and large electrical equipment. The instrument power supply needs to be connected separately.

2. The constant temperature water bath must use clean distilled water or deionized water, and the water temperature of the constant temperature water bath is adjusted to be 2 ~ 3℃ higher than the room temperature;

3. To ensure the continuous stability of the displacement sensor signal and reduce signal drift, it is recommended that the host power supply is always on to maintain the stable working state of the detector. The thermostatic water bath is always on to maintain a constant temperature in the detector area. If you need to turn off the instrument host or water bath, restart the machine, please wait at least 0.5 hours before testing.

4. When the equipment is used, the pressure in the furnace tube shall not exceed 0.15MPa (absolute pressure) to prevent damage to the equipment caused by excessive pressure;

5. When used under vacuum, the operating temperature of the equipment shall not exceed 1000℃.

6. The internal pressure of the gas supply cylinder is high, and when the gas is passed into the furnace tube, the pressure reducing valve must be installed on the cylinder. It is recommended to choose a small pressure reducing valve for test, and the pressure reducing valve has a measuring range of 0.01MPa-0.15MPa (relative pressure), which will be more accurate and safe in use.

7. Sample notes:

a. The composition of the sample should be generally understood before the experiment, and the instrument is not recommended for strong contamination and volatilization.

b. General samples should not be tested above the melting point. For the softening point test of glass samples, it should be ensured that the temperature will stop immediately after rising above the softening point (dL curve from expansion to rapid contraction) (with the help of the automatic protection function of "softening point detection").

c. For some samples that may stick to the bracket or push rod or cause contact surface contamination after heating up, gaskets should be placed on the front and back of the sample.

d. For some samples that are more polluting, may decompose, and may contaminate the support part, it can be tested in a protective sleeve.


standard configuration

1. One test host; 1 set of quartz sample support; 3. One Al2O3 standard sample; 4. A copy of the manual.

selective assembly

1. It can be equipped with a constant temperature water bath by setting the constant temperature of the circulating water, so that the detector part is always in a stable temperature environment, reduce the signal drift caused by room temperature fluctuations, and ensure the stability of the signal;

2. The instrument is a vacuum closed structure, and the vacuum pump can be externally selected. On the one hand, it can be vacuum-pumped and gas displacement operation, which can effectively ensure the purity of the inert atmosphere. On the other hand, it can also be tested under vacuum;

3. The measurement of vacuum can choose a digital vacuum gauge, which can accurately observe the relationship between vacuum degree and style;

4. NBD-TDA1200-45IT system provides fused quartz with low expansion rate as support and push rod material, with small system error and highest accuracy. Use ≤1100℃.

Service

One year warranty with lifetime service (warranty does not cover consumable parts such as quartz cavities, ejector rods and O-rings)

Net weight

20KG

 


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