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JJF 1938-2021: Calibration Specification for Digital Barometric Altimeters
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Calibration Specification for Digital Barometric Altimeters
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JJF 1938-2021
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Basic data | Standard ID | JJF 1938-2021 (JJF1938-2021) | | Description (Translated English) | Calibration Specification for Digital Barometric Altimeters | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A53 | | Classification of International Standard | 17.100 | | Word Count Estimation | 21,236 | | Date of Issue | 2021-12-08 | | Date of Implementation | 2022-06-08 | | Issuing agency(ies) | State Administration for Market Regulation | | Summary | This standard applies to the calibration of newly manufactured, in-use and repaired digital barometric altimeters whose measurement altitude is below 11000m. | JJF 1938-2021: Calibration Specification for Digital Barometric Altimeters---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Metrology Technical Specifications of the People's Republic of China
Calibration specification for digital barometric altimeter
Released on 2021-12-08
2022-06-08 Implementation
Released by the State Administration for Market Regulation
Calibration specification for digital barometric altimeter
Barometric Altimeters
Responsible unit: Meteorological Pressure Meteorological Committee of National Meteorological Measuring Instruments Measuring Technology Committee
Subcommittee
Main drafting unit: Meteorological Observation Center of China Meteorological Administration
Participating in the drafting unit: Guangdong Meteorological Observation Data Center
Shanxi Atmospheric Sounding Technical Support Center
Atmospheric Sounding Technology and Equipment Support Center of Tibet Autonomous Region
Heilongjiang Meteorological Data Center
This specification entrusts the Meteorological Pressure Sub-Technical Committee of the National Meteorological Measuring Instruments Measuring Technical Committee
committee responsible for explaining
The main drafters of this specification:
Ding Hongying (Meteorological Observation Center of China Meteorological Administration)
Li Jianying (Meteorological Observation Center of China Meteorological Administration)
Yu Hejun (Meteorological Observation Center of China Meteorological Administration)
Participating drafters:
Li Xindi (Guangdong Meteorological Observation Data Center)
Hao Chile (Shanxi Atmospheric Sounding Technical Support Center)
Chen Hua (Atmospheric Sounding Technology and Equipment Support Center of Tibet Autonomous Region)
Huang Qingzhi (Heilongjiang Meteorological Data Center)
Table of contents
Introduction (Ⅱ)
1 Scope(1)
2 References(1)
3 Terms and units of measurement(1)
3:1 Terminology(1)
3:2 Units of measurement(1)
4 Overview(1)
5 Metrological characteristics(1)
5:1 Altitude Indication Error(1)
5:2 Altitude return error(2)
6 Calibration conditions(2)
6:1 Environmental conditions (2)
6:2 Measurement standards and auxiliary equipment (2)
7 Calibration Items and Calibration Methods(3)
7:1 Preparations before calibration(3)
7:2 Altitude indication error calibration (3)
7:3 Altitude Return Error Calibration(3)
7:4 Data processing (4)
8 Calibration Results(4)
9 Recalibration interval(5)
Appendix A Functional relationship between altitude and air pressure (6)
Appendix B Additional error correction method caused by height difference of working medium (8)
Appendix C Calibration Original Record Reference Format (9)
Appendix D Altimeter Calibration Certificate Inner Page Format Page 2 (10)
Appendix E Altimeter Calibration Certificate Inner Page Format Page 3 (11)
Appendix F Examples of Calibration Uncertainty Evaluation of Altimeter Altitude Indication Error (12)
Introduction
JJF 1071-2010 "Rules for Compilation of National Metrology Calibration Standards", JJF 1001-2011 "General Metrology Terminology and
Definition", JJF 1059:1-2012 "Evaluation and Expression of Measurement Uncertainty" together form the basis of supporting calibration specifications
Sex series norms:
This specification is published for the first time:
Calibration specification for digital barometric altimeter
1 Scope
This specification applies to newly manufactured, in-use and repaired digital air pressure measuring altitudes below 11000m
Altimeter calibration:
2 References
This specification references the following documents:
JJG683 barometric altimeter
JJG1084-2013 Digital Barometer
For dated references, only the dated version applies to this specification; for undated references
document, its latest version (including all amendments) applies to this specification:
3 Terminology and units of measurement
3:1 Terminology
3:1:1 geopotential height
In the earth's gravitational field, the height represented by the potential energy of unit mass air relative to sea level:
3:2 Units of measurement
The unit of digital barometric altimeter altitude is meter (m) or kilometer (km):
4 Overview
The digital barometric altimeter (hereinafter referred to as the altimeter) adopts the principle of barometric altimeter and outputs data in digital form:
(display) A measuring instrument for air pressure and altitude: The altimeter consists of a barometric pressure sensor, a signal processing unit, an output (display)
unit etc: Its working principle is that the atmospheric pressure acts on the air pressure sensor to make it output a corresponding electrical signal, which is determined by
After processing by the signal processing unit, the altitude value corresponding to the air pressure is displayed:
5 Metrological characteristics
5:1 Altitude Indication Error
The height indication error of the altimeter shall not exceed the maximum allowable error value specified in Table 1:
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