Standards

JJG 162-2019 Active

JJG 162-2019 Cold Potable Water Meters

This procedure applies to the initial verification, subsequent verification, and in-use inspection of drinking cold water meters.
The drinking cold water meters referred to in this procedure are those with a temperature rating of T30 and T50, which measure the drinking cold water flowing through a closed, full pipe. They include water meters based on mechanical principles, electronic or electromagnetic principles, as well as water meters with electronic devices based on mechanical principles.

Publish Date: 2019-12-31

JJG 1036-2022 Active

JJG 1036-2022 Electronic Balance

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of electronic balances (hereinafter referred to as "balances") with a graduation value of e ≥ 1 mg.

Publish Date: 2022-12-07

JJG 34-2022 Active

JJG 34-2022 Dial Gauges

This procedure applies to pointer-type indicators with a graduation value of 0.001 mm and a measurement range upper limit of no more than 5 mm; pointer-type indicators with a graduation value of 0.002 mm and a measurement range upper limit of no more than 10 mm; digital-display indicators with a resolution of 0.001 mm and a measurement range upper limit of no more than 30 mm; digital-display indicators with a resolution of 0.005 mm and a measurement range upper limit of no more than 50 mm; and pointer-type and digital-display indicators with a graduation/resolution value of 0.1 mm and 0.01 mm and a measurement range upper limit of no more than 100 mm for initial verification, subsequent verification, and in-use inspection.

Publish Date: 2022-12-07

JJG 882-2019 Active

JJG 882-2019 Pressure Transmitters

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of pressure transmitters (including positive pressure, negative pressure, differential pressure, and absolute pressure).

Publish Date: 2019-12-31

JJG 738-2024 Active

JJG 738-2024 Verification Devices for Taximeters

This regulation applies to the first inspection, subsequent inspections, and in-use checks of the rental car meter testing device (hereinafter referred to as the on-board testing device) and the roller distance measurement testing device for rental car meters after installation (hereinafter referred to as the roller testing device).

Publish Date: 2024-02-07

JJG 693-2011 Active

JJG 693-2011 Alarmer Detectors of Combustible Gas

This regulation applies to the initial verification, subsequent verification, and in-use inspection of combustible gas detectors (including combustible gas detectors, hereinafter referred to as "instruments") used in non-mine working environments.

Publish Date: 2011-06-14

JJG 971-2019 Active

JJG 971-2019 Liquid Level Gauges

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of level gauges (excluding radiation-based level gauges). The calibration of level gauges can refer to this procedure for guidance.

Publish Date: 2019-12-31

JJG 959-2024 Active

JJG 959-2024 Optical Time Domain Reflectometers

This procedure is applicable to the initial and subsequent verification of single-mode and multi-mode optical time-domain reflectometers (OTDRs).

Publish Date: 2024-02-07

JJG 52-2013 Active

JJG 52-2013 Elastic Element Pressure Gauges,Pressure-Vacuum Gauges and Vacuum Gauges for General Use

This procedure applies to the initial verification, subsequent verification, and in-use inspection of elastic element-type general pressure gauges, pressure vacuum gauges, and vacuum gauges (hereinafter referred to as pressure gauges).

Publish Date: 2013-06-24

JJG 539-2016 Active

JJG 539-2016 Digital Indicating Weighing Instruments

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of digital indicator scales with medium and ordinary accuracy levels (hereinafter referred to as "scales").

Publish Date: 2016-11-30

JJG 1002-2005 Active

JJG 1002-2005 Rotational Viscometers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of rotational viscometers (hereinafter referred to as the instrument).
This procedure is illustrated using the NDJ series, Brookfield, LV, RV, HA, HB, KU series, as well as the FANN-35, ZNN-D6, cone/plate, and blood viscometers, and the Stommer viscometer as examples. The calibration of other rotational viscometers can be referenced to this procedure.

Publish Date: 2005-09-05

JJG 126-2022 Active

JJG 126-2022 Power Frequency A.C.Electrical Quantities Measuring Transducers

This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of measurement transmitters that convert AC electrical parameters into DC analog or digital signals within the frequency range of (45-65) Hz.

Publish Date: 2022-09-26