Standards

JJF 1218-2009 The Rule for Drafting in Report of Reference Materials

This standard specifies the requirements, content, and format for the preparation of development reports for national standard materials, and is applicable to development reports submitted for the evaluation of the classification of national first- and second-level standard materials.

Publish Date: 2009-06-03

JJF 1212-2008 Calibration Specification of Portable Weighing Instruments for Axles of Vehicle in Motion

This specification applies to the display calibration of portable dynamic axle weighbridges (hereinafter referred to as axle weighbridges) that dynamically weigh each axle of a moving vehicle separately and obtain the total weight of the vehicle through the cumulative function.

Publish Date: 2008-09-27

JJF 1206-2008 Calibration Specification for the Remote Calibration for Frequency Standard and Digital Clock

This specification is applicable to: the frequency deviation (frequency accuracy) and daily drift rate of atomic frequency standards and quartz crystal frequency standards, as well as the remote calibration of the time deviation and rate of precision digital clocks.

Publish Date: 2008-04-23

JJF 1198-2008 Calibration Specification of Tunable Laser Source for Telecommunications

This standard specifies the general metrological characteristics, calibration methods, and requirements for instrumentation used in the calibration of tunable laser sources for communication (hereinafter referred to as tunable sources). It is applicable to the initial calibration, subsequent calibration, and in-service inspection of tunable sources. The calibration of other similar tunable sources can be carried out in accordance with this standard. The requirements for metrological characteristics in the type evaluation of tunable sources can also be implemented in accordance with this standard.

Publish Date: 2008-03-25

JJF 1191-2008 Calibration Specification for Acoustic Performance of Audiometry Rooms

This standard specifies the measurement method for the acoustic characteristics of the sound field in an audiometry room.
This audiometry room is suitable for hearing threshold checks using pure tones, FM tones, narrowband noise, or recorded language materials, with air-conduction headphones, speakers, or bone vibrators as sound emitters.
The main purpose is to ensure the accuracy and reproducibility of audiometry results when determining the hearing threshold in a frequency range of 125Hz to 125kHz.
This standard is also applicable to the measurement of the acoustic characteristics of audiometry rooms used for measuring otoacoustic emissions and auditory evoked potentials.

Publish Date: 2008-03-24

JJF 1186-2007 The Rules for Drafting of Contents for Certificates and Labels of Certified Reference Materials

This rule stipulates the requirements, structure, and content for the preparation of certificates and labels for standard materials (hereinafter referred to as "certificates"), and is applicable to the preparation of certificates and labels.

Publish Date: 2007-12-10

JJF 1183-2007 Calibration Specification of the Temperature Transmitter

This specification applies to the calibration of temperature transmitters (hereinafter referred to as transmitters) with sensors that are thermocouples or thermal resistors. Transmitters include those with and without temperature sensors.

Publish Date: 2007-11-21

JJF 1184-2007 Testing Specification of Temperature Uniformity in Thermocouple Calibration Furnaces

This specification is applicable to the testing of the temperature field of horizontal tube-type thermocouple calibration furnaces (hereinafter referred to as calibration furnaces) with and without temperature controllers within the range of (300~1,500)°C. For the temperature field testing of vertical tube-type calibration furnaces and annealing furnaces, this specification can be referenced for implementation.

Publish Date: 2007-11-21

JJF 1182-2007 Cuide for Software Testing of Measuring Instruments

This guide describes the basic requirements, verification procedures, and main verification methods for software testing of metrological instruments, including application, level classification, type evaluation, and the preparation of evaluation rules. It serves as a guiding document for type evaluation of metrological instruments and can also be used as a reference document for daily supervision and management by metrological management departments and for software testing by metrological instrument production enterprises.
The verification/calibration of the metrological characteristics of metrological instruments shall be carried out in accordance with the corresponding national metrological verification procedures or metrological calibration standards.

Publish Date: 2007-08-21

JJF 1069-2007 Rules for the Examination of the Service of Legal Metrological Verification

Publish Date: 2007-02-28

JJF 1168-2007 Calibration Specification for Portable Braking Performance Tester for Motor Vehicles

This specification applies to the calibration of portable brake performance testers.
This specification stipulates the metrological performance and calibration methods of portable brake performance testers.

Publish Date: 2007-02-28

JJF 1171-2007 Calibration Specification for Temperature Itinerant Detecting Instrument

This specification is applicable to the calibration of temperature patrol detectors (hereinafter referred to as "patrol detectors") that use thermocouples, thermal resistors, and semiconductor resistors as temperature sensors (hereinafter referred to as "sensors") and have a measurement range of (-60 to +300)°C.

Publish Date: 2007-02-28