With the growth of local users, we strive to provide better services. NI's measuring board or module guarantees the accuracy index, and comes with a detailed calibration certificate when leaving the factory, and can be recalibrated regularly. Now, Ni China Branch entrusts Shanghai Metrology Institute, a national metrology unit, to provide paid professional calibration services for users in need, and issue calibration certificates to ensure the long-term measurement accuracy of products.