1、测量准确：高精度位移传感器配合无膨胀合金校准杆使用，测量误差在±1um以内，，保证了长龄期测试结果的准确性和对比性；
2、无需长期在线观测，到达龄期后测试即可，提升了设备使用效率；
3、试验过程无需手动记录，全部数据存储于测试主机当中，试验人员通过U盘即可将试验结果导出，然后通过电脑excel软件查看即可；
4、测试结果自带操作人员标识，同时记录试验时间、试验环境的温湿度、试件编号、龄期、试件长度；
5、设备具有权限设置功能，非操作人员无法登录，保证了试验结果的安全性；
Features:
1. More accurate: With the help of high-precision displacement sensor and invar calibration rod, the measurement error is less than 1um, which ensures the accuracy and comparability of long-term test results.
2. No needs for long-term on-line observation. Testing at the age can improve the efficiency of the equipment.
3. There is no need to record manually during the test process. All the data are stored in the test host. All results could be derived by the user through U disk, and then can be viewed by Excel.
4. The test results are marked by operators, and the test time, temperature and humidity of the test environment, specimen number, age and length are recorded at the same time.
5. The device has the function of permission setting, and the non-operator can not log in, which ensures the safety of the test results.
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