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JJF 1915-2021: (Inclinometer calibration specification)
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JJF 1915-2021
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Basic data | Standard ID | JJF 1915-2021 (JJF1915-2021) | | Description (Translated English) | (Inclinometer calibration specification) | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A52 | | Word Count Estimation | 16,132 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1915-2021: (Inclinometer calibration specification)---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.
(Inclinometer calibration specification)
National Metrology Technical Specification of the People's Republic of China
Inclinometer Calibration Specifications
Published on 2021-07-28
2022-01-28 Implementation
Released by the State Administration for Market Regulation
Inclinometer Calibration Specifications
Replacing JJF 1119-2004
JJF 1083-2002
Focal Point. National Technical Committee on Geometric Length Measurement
Main drafting unit. Beijing Institute of Metrology and Testing Sciences
Participating in the drafting unit. China Institute of Metrology
Changzhou Institute of Measurement and Testing Technology
This specification is interpreted by the National Technical Committee of Geometry and Length Measurement
The main drafters of this specification.
Liu Xingrong (Beijing Institute of Metrology and Testing)
Wang Zhichao (Beijing Institute of Metrology and Testing)
Zhang Manshan (Beijing Institute of Metrology and Testing)
Wang Xue (Beijing Institute of Metrology and Testing)
Quan Yizhi
Participating drafters.
Huang Yao (China Institute of Metrology)
Zhou Jun (Changzhou Institute of Metrology and Testing Technology)
content
Introduction (Ⅱ)
1 Scope(1)
2 Overview(1)
3 Metrology Characteristics(2)
3.1 The parallelism between the working faces of the electronic digital display inclinometer with multiple working faces (2)
3.2 The verticality between the working faces of the electronic digital display inclinometer with multiple working faces (2)
3.3 Zero value error(2)
3.4 Zero-value error consistency (2)
3.5 Indication error(2)
3.6 The repeatability of the displayed value of the electronic digital inclinometer (2)
4 Calibration Conditions(2)
4.1 Environmental conditions (2)
4.2 Standards and other equipment for calibration (2)
5 Calibration items and calibration methods (3)
5.1 The parallelism between the working faces of the electronic digital display inclinometer with multiple working faces (3)
5.2 The verticality between the working faces of the electronic digital display inclinometer with multiple working faces (3)
5.3 Zero value error(4)
5.4 Zero-value error consistency(4)
5.5 Indication error(4)
5.6 Repeatability of the displayed value of the electronic digital inclinometer (4)
6 Calibration results (5)
7 Recalibration interval(5)
Appendix A Special Fixtures(6)
Appendix B Indication Error Measurement Result Uncertainty Evaluation Example(7)
Introduction
JJF 1071-2010 "Rules for the Compilation of National Metrology Calibration Standards", JJF 1001 "General Metrology Terms and Definitions,"
JJF 1059.1-2012 "Assessment and Representation of Measurement Uncertainty" together constitute the basis for the preparation of this specification
A series of specifications, this specification refers to JB/T 11104-2011 "Electronic Digital Display Inclination Ruler", JB/T 9344-
1999 "Optical Inclinometer", JG142-2002 "Electronic Level for Construction", SJ/T 11276-2002 "Digital
Specification for Angle Measuring Instruments.
This specification replaces JJF 1119-2004 "Electronic Level Calibration Specification" and JJF 1083-2002 "Optical Tilt"
Compared with JJF 1119-2004 and JJF 1083-2002, the main technical changes are as follows.
---Expanded the scope of application of the specification, adding type II rectangular electronic digital display inclinometer, type III square box electronic digital display
Inclinometer related items;
--- Classify the electronic level into the type I type strip electronic digital display inclinometer;
---Increase the parallelism between the working faces of the multi-working face electronic digital display inclinometer;
---Increased the verticality between the working faces of the electronic digital display inclinometer with multiple working faces;
--- Increase the uncertainty evaluation of the measurement result of the optical inclinometer indication error;
--- Revised the description of the calibration method for the zero value error of the electronic digital inclinometer;
--- Revised the description and calculation of the calibration method of the inclinometer indication value error;
--- Revised the description and calculation of the repeatability calibration method of the electronic digital inclinometer;
---Re-evaluated the uncertainty of the measurement result of the display value error of the electronic digital inclinometer;
--- Deleted the use of dodecahedron and autocollimator for indication error calibration in JJF 1083-2002
method;
--- Deleted the return error item in the measurement performance requirements of JJF 1119-2004;
--- Deleted the calculation examples of display error, repeatability of angle measurement, and return error in Appendix B of JJF 1119-2004;
--- Deleted the calculation example of the maximum indication error of the optical inclinometer in Appendix A of JJF 1083-2002.
The previous releases of JJF 1083-2002 are as follows.
---JJF 1083-2002;
---JJG104-1986.
The previous releases of JJF 1119-2004 are as follows.
---JJF 1119-2004.
Inclinometer Calibration Specifications
1 Scope
This specification applies to the calibration of electronic digital inclinometers and optical inclinometers.
2 Overview
Inclinometer is an instrument used to measure the inclination angle of the measured object relative to the horizontal plane or the angle between two measured objects.
Including electronic digital display inclinometer with electronic inclination sensor and optical inclinometer with mechanical inclination measuring mechanism. Inclinometer
Widely used in machinery, automobiles, railways, construction, water conservancy and other related industries.
Fig.1 Type I strip electronic digital display inclinometer
1-display;2-level bubble;3-working surface;4-function key
Figure 2 Type II rectangular electronic digital display inclinometer
1-side working surface; 2-upper working surface; 3-display screen; 4-bottom working surface; 5-function key
Figure 3 Type III square box electronic digital display inclinometer
1-side working surface; 2-upper working surface; 3-display screen; 4-function key; 5-bottom working surface
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