Introduction:
The instrument according to the standard "GJB1875-94 rigid foam thermal physical performance test method" for low temperature linear expansion coefficient test; for testing a variety of solid materials, ultra-low temperature average linear expansion coefficient, the test method used for the top method (import High-precision micrometer sensor to induce deformation of the specimen at different temperatures. The use of computer technology on the sample detection, control, calculation, printing, storage by the computer automatically. Technical Parameters:
Temperature range: - 196 ℃ (liquid nitrogen immersion temperature) ~ 300 ℃;
Sample size: less than 20 × 20 × 50mm, can test 3 samples;
Using high-precision micrometer sensor (import) to induce deformation of the specimen at different temperatures,
Range greater than 15mm, resolution 0.1um, accuracy 0.2um.
Average linear expansion coefficient test range: 0.001 ~ 300.000 × 10-6 / ℃
Test accuracy: 0.2%;
High-precision high and low temperature thermostat, automatic temperature control, automatic data collection.
A. Temperature gradient: 1 ℃;
B. Temperature fluctuation: ≤ ± 1 ℃;
C. Temperature deviation: ≤ ± 1 ℃;
D. temperature control table shows the accuracy: ≤ 0.1 ℃;
E. Refrigeration: liquid nitrogen; heating method: heat pipe heating;
F. Studio size (depth X width X height mm): 300X350X500
G. box air circulation method: centrifugal fan forced circulation;
H. temperature (set temperature is positive) when the temperature is not allowed to exceed the set value of 1 ℃;
Cooling (set temperature is negative) when the temperature is not allowed to exceed the set value of -1 ℃;
I warming time: 60 minutes, from 0 to +300 ℃;
Cooling time: 40 minutes, from 0 ~ -190 ℃;
Introduction:
The instrument according to the standard "GJB1875-94 rigid foam thermal physical performance test method" for low temperature linear expansion coefficient test; for testing a variety of solid materials, ultra-low temperature average linear expansion coefficient, the test method used for the top method (import High-precision micrometer sensor to induce deformation of the specimen at different temperatures. The use of computer technology on the sample detection, control, calculation, printing, storage by the computer automatically.
