Standards

JJF 1070-2023 Active

JJF 1070-2023 Rules of Metrological Testing for Net Quantity of Products in Prepackages with Fixed Content

This standard specifies the measurement requirements for the net content of quantitatively packaged goods, measurement inspection, sampling and inspection during the measurement verification process, and the requirements and procedures for evaluation activities.
This standard applies to the measurement supervision and inspection, as well as arbitration inspections of the net content of quantitatively packaged goods. Commissioned inspections can refer to this standard for guidance. Units that produce and sell quantitatively packaged goods can also conduct self-inspections in accordance with this standard.
The quantitatively packaged goods subject to measurement inspections should be products that have passed the manufacturer's self-inspection, or goods imported and distributed by sellers.

Publish Date: 2023-10-12

JJF 2046-2023 Active

JJF 2046-2023 Calibration Specification for Standard Neutral Filters of Automobile Test Equipment

This specification applies to the calibration of standard neutral filters for devices such as transmissive smoke meters and light transmittance meters used in automotive inspections.

Publish Date: 2023-06-30

JJF 1139-2026 Active

JJF 1139-2026 Principle and Method for Determination of Verification Period of Measuring Instruments

This standard specifies the basic principles and methods for determining the calibration cycle of measuring instruments.
This standard applies to the determination of the calibration cycle of measuring instruments when revising or amending metrological calibration procedures. It also applies to the determination of the calibration cycle of newly developed or in-use measuring instruments, and provides a reference for adjusting the calibration cycle of measuring instruments.

Publish Date: 2026-01-24

JJF 1033-2023 Active

JJF 1033-2023 Rule for the Examination of Measurement Standards

This standard applies to the establishment of metrological standards, the assessment of newly established metrological standards, the review and assessment of existing metrological standards, and the supervision and management of the assessment of metrological standards.

Publish Date: 2023-03-15

JJF 2024-2023 Active

JJF 2024-2023 Calibration Specification for Energy Dispersive X-Ray Fluorescence Spectrometers

This specification applies to the calibration of energy-dispersive X-ray fluorescence spectrometers used for elemental analysis in polymers and metals. Instruments in other fields can refer to this specification for implementation.

Publish Date: 2023-03-15

JJF 2134-2024 Active

JJF 2134-2024 Calibration Specification for Rotational Rheometers

This specification is applicable to the calibration of rotational rheometers with a viscosity measurement range of (0 to 1,000) Pa·s.

Publish Date: 2024-06-14

JJF 2176-2024 Active

JJF 2176-2024 Calibration Specification for Portable Humidity Generators

This specification is applicable to the calibration of portable humidity generators that use a method of mixing dry gas and high-humidity gas to measure relative humidity in the range of 5% to 95%, and temperature in the range of 5℃ to 50℃.

Publish Date: 2024-10-19

JJF 2133-2024 Active

JJF 2133-2024 Calibration Specification for Sensors of Ocean Data Buoys

This standard applies to the calibration of sensors for parameters such as wind direction, wind speed, air temperature, relative humidity, air pressure, wave height, wave period, water temperature, and salinity on marine data buoys.

Publish Date: 2024-06-14

JJF 1984-2022 Active

JJF 1984-2022 Calibration Specification for Crystal Oscillators inside the Electrical Measurement Instruments

This specification is applicable to the calibration of quartz crystal oscillators in electronic measuring instruments.

Publish Date: 2022-09-26

JJF 1094-2002 Active

JJF 1094-2002 Evaluation of the Characteristice of Measuring Instruments

This standard specifies the basic principles and general methods for evaluating the characteristics of measurement instruments, and is applicable to the evaluation of the measurement characteristics of various types of measurement instruments, such as metering instruments, physical measuring tools, standard materials, and measurement systems. It is also applicable to the evaluation of the characteristics of measurement standards during the assessment of measurement standards.

Publish Date: 2002-11-04

JJF 1375-2024 Active

JJF 1375-2024 Calibration Specification for Motor Vehicle Engine Speed Measuring Instruments

This standard applies to the calibration of various measuring instruments for the speed of internal combustion engines and compression ignition engines of motor vehicles. Other non-road mobile diesel engine speed measuring instruments can also be calibrated in accordance with this standard.

Publish Date: 2024-09-18

JJF 1221-2009 Replaced

JJF 1221-2009 Calibration Specification for Chassis Dynamometers for Automobile Emissions Testing

This standard specifies the metrological characteristics, calibration conditions, calibration items, and calibration methods of chassis dynamometers used for detecting exhaust pollutants from automobiles (hereinafter referred to as chassis dynamometers).
This standard applies to the calibration of chassis dynamometers used for detecting exhaust pollutants from automobiles equipped with spark-ignition engines under steady-state operating conditions, simple transient operating conditions, and compression-ignition engines under load-and-deceleration operating conditions.

Publish Date: 2009-07-10