1. Different purposes

The purpose of calibration is to compare the measurement standards, evaluate the indication error of measuring instruments, and calibrate them to meet the measurement standard range, ensuring the accuracy of measurement values. This is a set of bottom-up measurement value traceability operations.

Verification purpose: To conduct a comprehensive evaluation of measuring instruments. This comprehensive evaluation belongs to the category of unified quantity values, and is a top-down process of quantity value transmission. Verification should evaluate whether measuring instruments meet the specified requirements. This requirement is the error range specified in the verification regulations for measuring instruments. Evaluate whether the error range of the measuring device is within the specified error range through verification.

2. Different properties

3. Based on different

4. Different conclusions