Enterprises and institutions in scientific research, production and service provision, especially in the inspection and testing process, to use to a large number of measuring instruments, such as special calipers, micrometers, micrometers; the production process of feeding scales, the process of monitoring monitors, pressure vessels, pressure pipelines pressure gauges, flow meters, finished product testing to the power meter; Measuring instruments for production and inspection ****, as well as measuring instruments and computer software equipped with mandatory verification, etc.. In accordance with GJB9001A-2001 standard 7.6 provisions of two requirements: First, the measuring instruments are used in the monitoring and measurement process equipment; Second, the measuring instruments to monitor and measure the results of the product (or service) in line with the identified requirements to provide evidence. At the same time to meet these two conditions, the need for calibration or verification.
Two, the difference between calibration or verification of measuring instruments
"Calibration" and "verification" is to ensure the accuracy of the value of two different ways and means. Calibration and verification from the traceability, they are the same, but from the legal effect, they are different. GJB9001A-2001 standard 7.6 clause a) requirements: against the traceability to international or national standards of measurement standards, if necessary, measuring equipment should be in accordance with the specified time interval or before use for calibration or verification. The word "or" in the standard establishes a parallel and optional relationship between calibration and verification. Under the premise of meeting the laws and regulations, enterprises and institutions can choose their own methods of verification or calibration for different situations.
Calibration is a voluntary traceability behavior of the enterprise, not mandatory, the enterprise can be calibrated on their own, but also can be entrusted to an external agency for calibration. The result of calibration is a calibration certificate or calibration report, the report does not judge the qualification of measuring instruments, generally is not a technical document with legal effect. The verification belongs to the national mandatory law enforcement behavior, the results of the verification must be sent to the measuring instruments, instruments and equipment to make a qualified or not, when the results are qualified, it will be issued to the certificate of verification, unqualified will be issued to the unqualified notice, the results of the verification has the force of law.
Measuring instruments belonging to the mandatory verification must also meet two conditions: First, the instrument is included in the national mandatory verification of the work of the meter directory; Second, the measuring instruments must be used for trade settlements, safety and security, medical care, environmental testing for specific purposes. Used for trade settlement, safety and security, medical and health, environmental testing purposes other than measuring instruments, such as scientific research, production, management and management of measuring instruments, generally in accordance with the non-compulsory verification of measuring instruments for management and control.