This instrument performs low-temperature linear expansion coefficient testing in accordance with the standard " Test Method for Thermophysical Properties of Rigid Foam Plastics"; it is used to test the ultra-low temperature average linear expansion coefficient of various solid materials. The testing method used is the ejector method (imported ) The high-precision micrometer sensor senses the deformation value of the sample at different temperatures. Using computer technology, the sample detection, control, calculation, printing and storage are all automatically completed by the computer.
Main technical parameters 1. Temperature range: - 196°C (liquid nitrogen) ~ 300°C; 2. Sample size: less than 2×2×5cm, 3 samples can be tested at the same time; 3. A high-precision micrometer sensor (imported) is used to sense the deformation value of the sample at different temperatures. The measuring range is greater than 15mm, the resolution is 0.1um, and the accuracy is 0.2um. 4. Average linear expansion coefficient test range: 0.001~300.000*10-6/°C 5. Test accuracy: 0.2%; 6. Use high-precision high and low temperature chambers, automatic temperature control, and automatic data collection. A: Temperature gradient: 1°C; B: Temperature fluctuation: ≤±1°C; C: Temperature deviation: ≤±1°C; D: Temperature control meter display accuracy: ≤0.1°C; E: Refrigeration method: liquid nitrogen; Heating method: Heating tube heating; F: Studio size (depth x width x height mm): 300X350X500 G: Air circulation method in the box: centrifugal fan forced circulation; H: When heating up (the set temperature is positive), the temperature is not allowed to exceed 1°C of the set value; When cooling down (the set temperature is negative), the temperature is not allowed to exceed -1°C of the set value; I: Heating time: within 60 minutes, from 0 to +300°C; Cooling time: within 40 minutes, from 0 to -190°C; 7. The computer can collect and control three samples at the same time. You can also select some channels not to collect, and you can input sample information separately. Real-time data calculation and display of expansion coefficient, volume expansion coefficient, linear expansion, and quenching expansion. The compensation coefficient is automatically calculated and compensated automatically, and it can also be corrected manually (online). Automatically record, store (file name includes sample information), print data, and print temperature-expansion coefficient curve. The temperature interval can be set freely, with a minimum interval of 1°C. 8. Power supply: 220V, 4KW
Instrument composition 1. The instrument consists of five parts: a high-precision micrometer sensor and data processing system, a high-precision high and low temperature test chamber, an electric lifting mechanism, a liquid nitrogen tank, and a computer temperature control. According to customer requirements, it can be equipped with corresponding computer measurement and control software. 2. There is a hollow electric-heated tempered glass in the center of the test chamber door; the sample can be accessed and placed by opening the door, making it easy to load and unload the sample. 3. Use imported intelligent temperature control instruments with multiple protection functions such as over-temperature, over-pressure and overload, fan overheating, and PID over-temperature.
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