Standards

JJG 1211-2025 Active

JJG 1211-2025 Verification Regulation of Wind Direction Sensors of Automatic Meteorological Stations

This procedure applies to the initial verification, subsequent verification, and in-use inspection of wind direction sensors for automatic weather stations with a measurement range of 0° to 360° (hereinafter referred to as wind direction sensors).

Publish Date: 2025-06-11

JJG 515-2025 Active

JJG 515-2025 Verification Regulation of Portable Induction Anemometers

This regulation applies to the initial verification, subsequent verification, and in-use inspection of portable magnetic induction wind direction and wind speed meters (hereinafter referred to as magnetic induction wind speed meters) with a measurement range of (2 to 30) m/s.

Publish Date: 2025-06-11

JJG 597-2025 Active

JJG 597-2025 Verification Regulation of Verification Equipment for AC Electrical Energy Meters

This procedure applies to the initial verification, subsequent verification, and in-use inspection of electricity metering verification units for AC energy meters with a reference frequency of 50 Hz or 60 Hz, as well as automated testing systems for AC energy meters with a class 0.05 or lower.
The metrological performance, general technical requirements, and control requirements for AC energy meter verification devices described in this procedure are applicable to the electricity metering verification units of AC energy meter automated testing systems.

Publish Date: 2025-06-11

JJG 207-2025 Active

JJG 207-2025 Verification Regulation of Meteorological Liquid-in-glass Thermometers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of glass liquid temperature gauges with a measurement range of (-60 to +80) °C (hereinafter referred to as "temperature gauges").

Publish Date: 2025-06-11

JJG 2086-2025 Active

JJG 2086-2025 Verification Scheme of Measuring Instruments for AC Voltage

This calibration system table is suitable for the transfer of measurement values of AC voltage measuring instruments with a voltage range of 1 mV to 1 kV and a frequency range of 10 Hz to 1 MHz.
This calibration system table is a procedure in which the national AC voltage reference device transfers the AC voltage measurement values to working measurement instruments through metrological standards, and specifies their uncertainties and measurement value transfer methods. It can also be used as a basis for traceability of measurement values during calibration.

Publish Date: 2025-06-11

JJG 1210-2025 Active

JJG 1210-2025 Verification Regulation of Digital Input AC Electricity meters

This regulation applies to the initial verification, subsequent verification, and in-use inspection of digital AC energy meters with a nominal frequency of 50 Hz or 60 Hz.
This regulation does not apply to the verification of digital AC standard energy meters.

Publish Date: 2025-06-11

JJG 204-2025 Active

JJG 204-2025 Verification Regulation of Meteorological Ventilation Psychrometers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of meteorological ventilated dry-wet thermometers with a temperature measurement range of (-10 to 45) ℃.

Publish Date: 2025-06-11

JJG 688-2025 Active

JJG 688-2025 Verification Regulation of Vehicle Exhaust Emissions Measuring Instruments

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of automotive emission gas testers (hereinafter referred to as testers). The testers are used to measure the volume fraction of one or more components. The minimum measurement range of the tester for the volume fraction of different components shall meet the following requirements: HC: (0～2,000)×10-6, CO: (0～500)×10-2, CO2: (0～160)×10-2, NO: (0～4,000)×10-6, O2: (0～210)×10-2, NO2: (0～400)×10-6.

Publish Date: 2025-06-11

JJG 1052-2025 Active

JJG 1052-2025 Verification Regulation of Loop Resistance Testers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of digital loop resistance testers with a rated working current of not less than 100 A.

Publish Date: 2025-06-11

JJG 579-2025 Active

JJG 579-2025 Verification Regulation of Trial Case Lenses

This procedure is applicable to the initial inspection, subsequent inspection, and in-use inspection of all types of full-aperture and reduced-aperture optical lens boxes.

Publish Date: 2025-02-08

JJG 1151-2025 Active

JJG 1151-2025 Verification Regulation of Liquid Chromatograph-Atomic Fluorescence Spectrometers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of liquid chromatography-atomic fluorescence spectrometers.

Publish Date: 2025-02-08

JJG 681-2025 Active

JJG 681-2025 Verification Regulation of Dispersive Infrared Spectrophotometers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of dispersive infrared spectrometers with a wave number range of (4,000 to 400) cm-1.

Publish Date: 2025-02-08