Classification management methods for measuring instruments

1、 Scope of Class A measuring instruments:

1. The highest measurement standards and measuring standard instruments of the company;

2. Measuring instruments used for trade settlement, safety protection, medical and health, and environmental monitoring, and included in the scope of mandatory verification of measuring instruments;

3. Measuring instruments used for key parameters in production process and quality inspection;

4. Measuring instruments used for accounting of incoming and outgoing materials;

5. Measuring instruments with high accuracy or frequent use but poor reliability in precision testing.

2、 Scope of Class B measuring instruments:

1. Measuring instruments used for safety protection, medical and health, and environmental monitoring, but not included in the scope of mandatory calibration of measuring instruments;

2. Measuring instruments used for non critical parameters in the production process;

3. Measuring instruments for testing general parameters of product quality;

4. Measuring instruments for secondary and tertiary energy measurement;

5. Measuring instruments for internal material management in enterprises.

3、 Scope of Class C measuring instruments:

1. Low value and consumable measuring instruments that are not subject to mandatory verification;

2. Measuring instruments for internal energy distribution and auxiliary production in the company's living area;

3. Measuring instruments that do not require precise measurement data during use;

4. Measuring instruments that are explicitly allowed to be calibrated once by the national metrological administrative department.