Current Category: CN-JJG - National Metrology and Inspection Regulations JJG
This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of silicon single-crystal resistivity standard samples.
This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of synthesized signal generators with a frequency output range of 5 kHz to 265 GHz.
This regulation applies to the type evaluation, prototype testing, initial verification, subsequent verification, and in-use inspection of motor vehicle radar speed detectors (hereinafter referred to as speed detectors).
This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of the general-purpose Type A pulse reflection ultrasonic flaw detectors.
This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of grating micrometers with a resolution of 0.01 μm to 1 μm and a measurement range of up to 100 mm.
This procedure applies to the initial verification, subsequent verification, and in-use inspection of impedance audiometers. If the impedance audiometer includes a pure tone audiometer component, the pure tone audiometer component shall be verified in accordance with the verification procedure for pure tone audiometers specified in JJG 388—2001.
This procedure applies to the initial verification, subsequent verification, and in-use inspection of electric ventilated hygrometers (hereinafter referred to as hygrometers).
Electric ventilated hygrometers include two types: digital display ventilated hygrometers and ordinary electric ventilated hygrometers without digital displays; hygrometers also come in two types: glass mercury thermometers and platinum resistance thermometers.
This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of mechanical liquid relative density balances with a liquid relative density not exceeding 2.0000.
This regulation applies to the initial verification, subsequent verification, and in-use inspection of photoelectric and calorimetric laser power meters. The requirements for metrological performance during the type-approval and prototype testing of laser power meters can be referenced in accordance with this regulation.
This procedure is applicable to the initial verification, subsequent verification, and in-use inspection of balance-type precision dew point meters used for automatic detection of frost layers in thermoelectric refrigeration (mirror or surface acoustic wave devices).
This procedure is applicable to the type-approval (or prototype testing), initial verification, subsequent verification, and in-service inspection of pressure transmitters (including positive and negative gauge pressure, differential pressure, and absolute pressure).
This procedure applies to the initial verification, subsequent verification, and in-use inspection of double-pan, single-lever, and equal-arm frame pan balances (hereinafter referred to as "balances").