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JJG 191-2018 English PDF

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JJG 191-2018: Calibrators for Levels
Status: Valid

JJG 191: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 191-2018English509 Add to Cart 4 days [Need to translate] Calibrators for Levels Valid JJG 191-2018
JJG 191-2006EnglishRFQ ASK 3 days [Need to translate] Inspecting Instrument for Static Geometry Parameter of Track JJG 191-2006
JJG 191-2002English559 Add to Cart 4 days [Need to translate] Verification Regulation of Calibrators for the Levels Obsolete JJG 191-2002
JJG 191-1979English319 Add to Cart 3 days [Need to translate] Verification Regulation of Calibrators for the Levels Obsolete JJG 191-1979

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Basic data

Standard ID JJG 191-2018 (JJG191-2018)
Description (Translated English) Calibrators for Levels
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A52
Word Count Estimation 22,230
Date of Issue 2018-12-25
Date of Implementation 2019-06-25
Older Standard (superseded by this standard) JJG 191-2002
Regulation (derived from) State Administration of Markets, Announcement No. 34 of 2018
Issuing agency(ies) State Administration for Market Regulation

JJG 191-2018: Calibrators for Levels

---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.
(Level tester verification procedure) National Metrology Verification Regulations of the People's Republic Level detector Published on.2018-12-25 2019-06-25 implementation State Market Supervisory Administration released Level tester verification procedure Replacing JJG 191-2002 Focal Point. National Geometric Quantity Engineering Measurement Technology Committee Drafting unit. Henan Institute of Metrology Hubei Institute of Metrology Zhejiang Institute of Metrology Xiamen Saibao Industrial Technology Research Institute Co., Ltd. Zhengzhou Ruida Measuring Instrument Technology Co., Ltd. This regulation entrusts the National Geometric Quantity Engineering Parameter Measurement Technical Committee to explain The main drafters of this procedure. Jia Xiaojie (Henan Institute of Metrology) Chen Jianqiang (Hubei Institute of Metrology) Zhou Wenqing (Zhejiang Institute of Metrology) Chang Qing (Xiamen Saibao Industrial Technology Research Institute Co., Ltd.) Participate in the drafters. Huang Yuzhu (Henan Institute of Metrology) Fan Naiqi (Henan Institute of Metrology) Guo Tuojin (Zhengzhou Ruida Measuring Instrument Technology Co., Ltd.)

table of Contents

Introduction (II) 1 Scope (1) 2 References (1) 3 terms (1) 4 Overview (1) 5 Metrological performance requirements (2) 5.1 Flatness of the anvil surface of the screw-type level detector (2) 5.2 Lever screw secondary level verifier The relative position between the edge of the differential cylinder and the transverse line of the fixed sleeve (2) 5.3 Radial runout of the indexing plate of the screw-type level meter (2) 5.4 Spareness of the screw-type level meter to the index board (2) 5.5 Surface roughness of work surface (2) 5.6 Flatness of work surface (2) 5.7 Vertical level zero correctness (2) 5.8 Horizontal level zero correctness (2) 5.9 division value error (2) 5.10 Return error (2) 6 General technical requirements (3) 6.1 Appearance (3) 6.2 Interaction of various parts (3) 7 measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Verification project (3) 7.3 Verification method (4) 7.4 Processing of verification results (8) 7.5 Verification cycle (8) Appendix A The index value error of the lever screw sub-level calibrator with a graduation value of 0.005mm/m and Check data processing example of return error (9) Appendix B Digital Display Level Detector Gradient Value Error and Backhaul with Resolution 0.001mm/m Error verification data processing example (11) Appendix C Format of Information in the Certificate/Verification Result Notice (13)

Introduction

JJG 191 "Level Detector" is written in accordance with JJF1002-2010 "National Metrology Verification Regulations Rules, JJF1094-2002 "Measurement of Characteristic Characteristics of Measuring Instruments", refer to JB/T 12197-2015 The Instrument Verifier is revised for JJG 191-2002 Level Tester. And JJG 191-2002 "Level Compared with the editorial modification, the main technical changes are as follows. --- The scope of application has increased the level detector with a resolution of 0.001mm/m; --- Revised the outline structure diagram, re-labeled Figure 1 and Figure 2; --- Modify the "distance between the edge of the differential cylinder and the transverse line of the fixed casing" to "the differential cylinder edge and the fixed casing The relative position between the lines is crossed and the content is re-described; ---Modified the "surface roughness of the work surface" technical indicators; ---Modified the "flatness of the work surface" technical indicators, increased the flatness of the working surface greater than 300mm Technical indicators and their verification methods; --- Modified the formula of the scale value error of the level detector; --- Increased the corresponding calibration method for the scale value error of the level detector with a resolution of 0.001mm/m and Data processing method; --- Increased the method of using the grating micrometer as the main verification equipment to check the index value error and backhaul error; --- Added Appendix B. The previous versions of this procedure were released. JJG 191-2002; JJG 191-1979. Level tester verification procedure

1 Scope

This procedure is applicable to the measurement range (0~1.5) mm/m, and the division value is 0.005mm/m, 0.01mm/m. First-time verification, subsequent verification, and in-use inspection of a level detector with a resolution of 0.001 mm/m.

2 reference files

This procedure refers to the following documents. JB/T 12197-2015 Level Tester For dated references, only the dated version applies to this Code; any undated quotation The latest version (including all amendments) applies to this procedure.

3 terms

3.1 division value error divisionvalueerror The difference between the nominal scale value of the level meter and the actual scale value.

4 Overview

The level calibrator is an instrument that uses a height difference at both ends of the working surface to form a small angle. It is mainly used for The indexing values of the calibration box and the bar level. The level detector can be divided into a lever screw type and a screw according to its structure. The wire pair can be divided into. reticle reading and digital display reading according to its reading mode. Its outline structure is shown in Figure 1 and Figure 2. Figure 1 Schematic diagram of the lever screw type and digital display level detector 1-stop; 2-work table; 3-position block; 4-transverse level; 5-handwheel; 6-foot adjustment screw; 7-vertical level; 8-reading part (differential cylinder or digital display window)

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