Current Category: CN-JJF - National Metrology Technical Specifications JJF
This specification is applicable to the calibration of the performance parameters of swing-type bioreactors based on the shaking cultivation method.
This specification is applicable to the calibration of the performance parameters of biosafety sampling cabinets.
This standard applies to the calibration of transcranial magnetic stimulation therapy devices (single-pulse, dual-pulse, and repetitive-pulse stimulation modes).
This standard applies to the calibration of limb compression therapy equipment, but it does not apply to the calibration of hemostatic equipment, anti-bedsore air cushions, shock wave therapy equipment, cupping jars, and airbag extracorporeal counterpulsation devices, etc.
This specification is applicable to the calibration of blood thawing machines based on the principles of constant-temperature hydrolysis and dry hot air method.
This specification is applicable to the calibration of vehicle-mounted road traffic marking retroreflective measuring instruments.
The calibration method specified in this standard is applicable to the online calibration of bridge and tunnel structure monitoring systems where the sensors are not easily disassembleable. Other types of monitoring systems can refer to and use it.
This standard is not applicable to the online calibration of monitoring systems composed of embedded sensors.
This type evaluation outline is applicable to the type evaluation of liquid volume flowmeters with a nominal diameter of no more than 300 mm and a classification code of 12181500.
The type test can be conducted in accordance with this outline.
This specification is applicable to the calibration of eddy current metal detectors used for motor vehicle inspections.
This standard applies to the calibration of bench-type and portable particulate matter detectors used to measure the concentration of particulate matter in the exhaust gas of mobile sources, based on the principles of condensation nucleus particle counting or diffusion charging.
The particulate matter concentration calibration range for bench-type particulate matter detectors is (50 to 20,000) particles/cm3.
The particulate matter concentration calibration range for portable particulate matter detectors is (5×103 to 1×107) particles/cm3.
This specification is applicable to the calibration of meteorological units (also known as meteorological stations or environmental parameter testers, etc.) used for motor vehicle inspections.
This standard applies to the calibration of standard digital power meters for direct current with a voltage not exceeding 1,000 V and a current not exceeding 600 A, standard digital power meters for alternating current with a frequency range of 45 Hz to 65 Hz and a voltage not exceeding 600 V and a current not exceeding 100 A, as well as standard digital power meters for both direct and alternating current within the aforementioned measurement ranges.