Current Category: CN-JJF - National Metrology Technical Specifications JJF
This specification is applicable to the calibration of gap measuring instruments with a gap measurement range not exceeding 20 mm and a surface deviation measurement range not exceeding 15 mm.
This specification is applicable to the calibration of paint film scratch testers.
This specification is applicable to the calibration of laboratory vibratory liquid density meters (including desktop vibratory density meters and portable vibratory density meters) under normal pressure.
This specification is applicable to the calibration of the temperature and salt spray deposition rate parameters of salt spray test boxes.
This specification is applicable to the calibration of water-soluble acid measuring instruments based on the principle of colorimetry.
This standard specifies the main methods of water intake measurement for agricultural irrigation wells, the general requirements for instrumentation measurement, and the selection and installation of measuring instruments, including the establishment of electricity-to-water conversion records, the acquisition of electricity data, the determination of the electricity-to-water conversion coefficient, and the calculation of water intake volumes.
This standard applies to the design, construction, operation and maintenance, and management of water intake measurement facilities for agricultural irrigation.
This specification is applicable to the calibration of laser confocal microscopy Raman spectrometers (referred to as microscopy Raman spectrometers), portable Raman spectrometers, and handheld Raman spectrometers. The calibration of other types of Raman spectrometers can be carried out in accordance with this specification.
This specification is applicable to the calibration of welding inspection rulers.
This standard applies to the calibration of light intensity meters used to measure the light intensity of single low-power light-emitting diodes (hereinafter referred to as LED light intensity meters), with a measurement range of (0.1 to 100) cd. LED light intensity meters with other measurement ranges can refer to this standard for implementation.
This specification is applicable to the calibration of digital lightning protection component testers with a constant current of 1 mA and a starting operation voltage and a DC breakdown voltage not exceeding 2,000 V. Pressure-sensitive resistor testers and surge protection device testers with some of the functions and the same measurement range as those in this specification can refer to this specification for calibration.
This specification stipulates the general requirements for software trustworthiness, including software identification, algorithm and functional correctness, software protection, software interface protection, data storage, data transmission, verification of executable code, and trustworthiness levels, as well as the evaluation methods, evaluation results, and their presentation for software related to the legal metrology of sound level meters.
This specification applies to the evaluation of the trustworthiness of software related to the legal metrology of sound level meters.
This specification is applicable to the calibration of infant incubator detectors.