Standards

JJG 2097-2024 Active

JJG 2097-2024 Verification Scheme of Measuring Instruments for Terahertz Radiation Power

This verification system table is applicable to the transfer and traceability of measurement values for terahertz radiation power measurement instruments. It specifies the purpose of the national reference standard for terahertz radiation power, the basic components of the reference standard, the technical specifications of the reference standard, the basic components of the terahertz radiation power standard, the operating range and measurement uncertainty, and the procedure for transferring measurement values to terahertz power meters of different accuracy levels.

Publish Date: 2024-10-19

JJG 165-2024 Active

JJG 165-2024 Verification Regulation of Standard Bell Provers of Gas Flow

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of bell-type gas flow standard devices (hereinafter referred to as "bell-type devices") whose testing medium is air.

Publish Date: 2024-10-19

JJG 225-2024 Active

JJG 225-2024 Verification Regulation of Heat Meters

This regulation applies to the initial and subsequent verification of heat meters with a nominal diameter (referred to as the diameter) of no more than 400 mm, which use water as the medium.

Publish Date: 2024-10-19

JJG 868-2024 Active

JJG 868-2024 Verification Regulation of Standard Ultrasonic Power Sources for Milli Watt-level

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of milliwatt-level standard ultrasonic power sources with a frequency range of (0.5~25) MHz and an ultrasonic power range of (1~500) mW.

Publish Date: 2024-10-19

JJG 1028-2024 Active

JJG 1028-2024 Verification Regulation of X-ray Radiation Source for Radiotherapy Simulators

This regulation applies to the initial verification, subsequent verification, and in-use inspection of X-ray radiation sources used for simulation positioning before or during radiotherapy. The operating voltage of its high-voltage generator does not exceed 400 kV.
This regulation does not apply to X-ray radiation sources that utilize computed tomography (CT) simulation positioning technology.

Publish Date: 2024-09-18

JJG 1081.1-2024 Active

JJG 1081.1-2024 Verification Regulation of Measuring Instrument for Wheel-Diameter of Railway Locomotive and Vahicles—Part 1:Ruler for Wheel-Diameter

This regulation applies to the initial verification, subsequent verification, and in-use inspection of wheel gauge gauges for railway locomotives and rolling stock.

Publish Date: 2024-09-18

JJG 1081.2-2024 Active

JJG 1081.2-2024 Verification Regulation of Measuring Instrument for Wheel-Diameter of Railway Locomotive and Vahicles—Part 2:Measuring Tools for Wheel-Diameter

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of wheel diameter measuring devices for railway locomotives and rolling stock.

Publish Date: 2024-09-18

JJG 1203-2024 Active

JJG 1203-2024 Verification Regulation of Tanker Containers Volume

This regulation applies to the initial verification, subsequent verification, and in-use inspection of the volume of tank containers used for transporting liquid and liquefied gas products. Other tank container volume verifications can be implemented with reference to this regulation.

Publish Date: 2024-09-18

JJG 184-2024 Active

JJG 184-2024 Verification Regulation of Volume of Rail Tankers for Liquefied Gases

This regulation applies to the initial inspection, subsequent inspections, and in-service inspections of liquefied gas railway tank cars.

Publish Date: 2024-09-18

JJG 521-2024 Active

JJG 521-2024 Verification Regulation of X and Gamma Radiation Air Kerma Ratemeters for Environmental Monitoring

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of portable, mobile, and fixed instruments used to measure the ambient X and γ radiation air kerma rate. The air kerma rate K·a is generated by external X and γ radiation, with the X and γ radiation energy range being 80 keV to 15 MeV; the air kerma rate range is not less than 30 nGy/h to 30 μGy/h. This procedure is not applicable to the verification of instruments used to measure the ambient X and γ radiation air kerma (cumulative dose), nor to the verification of passive detection devices such as film dosimeters, thermoluminescent dosimeters (TLDs), optically stimulated luminescence (OSL) dosimeters, radium-platinum-luminous (RPL) dosimeters, or quartz wire electrometers. It is also not applicable to measurement systems for β and neutron radiation.

Publish Date: 2024-09-18

JJG 1009-2024 Active

JJG 1009-2024 Verification Regulation of Personal Dose Equivalent HP(10)Monitors for X and γ Radiation

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of the X-ray and gamma radiation personal dose equivalent HP(10) monitors.
This procedure is not applicable to the weak penetrating X-ray and gamma radiation personal dose equivalent HP(0.07) monitors.

Publish Date: 2024-09-18

JJG 1095-2024 Active

JJG 1095-2024 Verification Regulation of Environmental Noise Automatic Monitors

本规程适用于1级和2级环境噪声自动监测仪（又称环境噪声自动监测终端，以下简称监测仪）的首次检定、后续检定和使用中检查。

Publish Date: 2024-09-18