(1) the scope of Class A measuring instruments:
1, the company's highest measurement standards and measuring instruments;
2, for trade settlement, safety and security, medical and health care and environmental monitoring, and included in the scope of mandatory verification of work measuring instruments measuring instruments;
3, production process and quality testing of key parameters with the measuring instruments
4, in and out of the plant material accounting with measuring instruments;
5, precision testing of high accuracy or frequent use and poor reliability of measuring instruments.
(2) the scope of Class B measuring instruments:
1, safety, health care and environmental monitoring, but is not included in the mandatory verification of the scope of measuring instruments;
2, non-critical parameters in the production process with the measuring instruments;
3, product quality of the general parameters of the detection of measuring instruments;
4, two or three energy measurement with measuring instruments;
5, precision testing of high accuracy or frequent use and poor value reliability. Second, three energy measurement measuring instruments;
5, internal material management measuring instruments.
(3) the scope of measuring instruments in category C:
1, low-value consumable, non-compulsory verification of measuring instruments;
2, the company's living quarters with the distribution of energy measuring instruments, auxiliary production measuring instruments;
3, in the process of measuring data in the measurement of imprecise requirements of the measuring instruments;
4, the national measurement of the administrative department Measuring instruments ordered to allow a one-time verification.
To determine the measuring instruments is a one-time verification:
If belonging to category C measuring instruments, will likely measuring instruments is a one-time verification, can not be specifically tested.
Expanded information:
Class A measuring instruments include:
First-class flat crystal, zero-grade knife edge ruler, level gauge checker, right-angle ruler checker, measuring tape checker, percent gauge checker, percentile gauge checker, micrometer checker, self-collimating instrument, vertical optical meter and so on.
Category B measuring instruments include:
Calipers, micrometers, percentage rulers, micrometers, levels, right-angles, plug gauges, leveling, latitude and longitude, welding inspection tape, ultrasonic thickness gauge, more than 5M tape measure, as well as thermometers, pressure gauges, force gauges, tachometers, scales, hardness testers, balances, Voltmeter, ammeter, megohmmeter, electric power meter, bridge, resistance box, current detector, multimeter, standard resistance box, calibration signal generator, ultrasonic flaw detector, spectrophotometer and so on.
Category C includes:
Steel straightedge, curved ruler, steel tape measure below 5M, etc.
Baidu Encyclopedia - Measuring Instruments