Current Category: CN-JJF - National Metrology Technical Specifications JJF
This specification applies to the calibration of measurement receivers in the frequency range of 150kHz to 265GHz that are newly manufactured, newly purchased, in use, or repaired.
This specification applies to the calibration of digital signal generators with a frequency range of 250 kHz to 6 GHz and modulation methods including BPSK, QPSK, π/4 DQPSK, 8PSK, 16QAM, 32QAM, 256QAM, FSK, and MSK (communication standards including NADC, GSM, PHS, DECT, IS-95 CDMA, CDMA2000, and WCDMA).
This specification is applicable to the calibration of metal wire woven nets with dimensions of (0020 to 125) mm and metal perforated plate test sieves with dimensions of (1 to 125) mm.
This specification is applicable to the calibration of tungsten-rhenium thermocouples (hereinafter referred to as thermocouples) with a measurement range of 0℃ to 1,500℃ and non-removable protective tubes. The calibration of tungsten-rhenium thermocouples without protective tubes can also be carried out in accordance with this specification.
This specification is applicable to the calibration of ion traps and quadrupole-type desktop gas chromatograph-mass spectrometers (hereinafter referred to as desktop GCMS). The calibration of other types of desktop GCMS can be carried out in accordance with this specification.
This standard applies to the calibration of new, in-use, and repaired ordinary cardiac defibrillators (hereinafter referred to as defibrillators) and cardiac defibrillation monitors (hereinafter referred to as defibrillation monitors) in the defibrillation section (including the impact of the defibrillation section on the electrocardiogram monitoring section during defibrillation); it does not apply to the calibration of automatic external defibrillators and implantable defibrillators. The metrological characteristics and calibration of the electrocardiogram monitoring section of defibrillation monitors can be carried out in accordance with the relevant provisions of the JJG 760—2003 Electrocardiogram Monitor Calibration Procedure.
This specification is applicable to the calibration of optical, electronic, and mechanical four-wheel alignment instruments.
This specification is applicable to the calibration of geodetic and navigation Global Positioning System (GPS) receivers of various accuracies (hereinafter referred to as GPS receivers).
This specification is applicable to the calibration of digital display electronic level rulers with a resolution of 0.01°. Electronic level rulers with other resolutions can be calibrated in accordance with this specification.
This standard applies to the organization, implementation, and evaluation of measurement instrument comparisons organized by metrology administrative departments at all levels of government (hereinafter referred to as "comparisons"), in order to ensure and check the accuracy and reliability of measurement instrument values and achieve traceability. Similar comparisons organized or initiated by other departments may also be used for reference.
This specification is applicable to the calibration of surface roughness comparison samples. It includes: samples processed by grinding, turning, boring, milling, inserting, planing, EDM, and polishing, or samples copied by electroforming using these samples as master models (motherboards), as well as "surface roughness standard parts" selected from batch-produced parts.
This specification is applicable to the calibration of plane-type equal-thickness interferometers, but not to the calibration of similar interferometric devices that can only estimate the amount of bending of interference fringes.