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JJG 743-2018 | English | 369 |
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Flow Cup Viscometers
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JJG 743-2018
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JJG 743-1991 | English | 239 |
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Verification Regulation of Flow Cups Viscosimeter
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JJG 743-1991
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PDF similar to JJG 743-2018
Basic data Standard ID | JJG 743-2018 (JJG743-2018) | Description (Translated English) | Flow Cup Viscometers | Sector / Industry | Metrology & Measurement Industry Standard | Classification of Chinese Standard | A53 | Word Count Estimation | 16,134 | Date of Issue | 2018-06-25 | Date of Implementation | 2018-12-25 | Older Standard (superseded by this standard) | JJG 743-1991 | Regulation (derived from) | State Administration of Markets, Announcement No. 13 of 2018 | Issuing agency(ies) | State Administration for Market Regulation |
JJG 743-2018: Flow Cup Viscometers---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.
Flow Cup Viscometers
National Metrology Verification Regulations of the People's Republic
Outflow cup viscometer
Published on.2018-06-25
2018-12-25 implementation
State Administration of Markets issued
Outflow cup viscometer verification procedure
Replace JJG 743-1991
Focal Point. National Physical and Chemical Metrology Technical Committee
Drafted by. China Institute of Metrology
Liaoning Institute of Metrology
This procedure entrusts the National Physical and Chemical Metrology Technical Committee to explain
Drafters of this procedure.
Zhang Zhengdong (China Institute of Metrology)
靳彤 (China Institute of Metrology)
Tao Cheng (Liaoning Institute of Metrology)
table of Contents
Introduction (II)
1 Scope (1)
2 References (1)
3 Overview (1)
4 Metrology performance requirements (1)
5 General technical requirements (1)
6 measuring instrument control (2)
6.1 Verification conditions (2)
6.2 Verification method (2)
6.3 Processing of verification results (4)
6.4 Verification cycle (4)
Appendix A Reference Material Selection Reference Range (5)
Appendix B Standard Outflow Time Calculation Formula (6)
Appendix C Verification Record Format (8)
Appendix D Verification Certificate and Verification Result Notification Form (9)
Introduction
This regulation adopts JJF1001-2011 "General Measurement Terms and Definitions" and JJF1002-2010 "National Metrology Inspection"
Rules for the preparation of rules, JJF1059.1-2012 "Evaluation and Representation of Measurement Uncertainty" for basic norms
Revised.
Compared with the version of JJG 743-1991, the main contents of this revision are as follows.
---Add "Introduction", "Reference Documents" and "Overview";
---Add coating-1, Tu-4, portable coating-4, ISO -5, and Ford series outflow cup viscometer
Verification content;
--- Increase the reproducibility of the correction factor in the measurement performance requirements;
---The temperature range of the verification is changed from (20~30) °C of the original procedure to no specific limit, as long as the viscosity meter
Allowable temperature;
--- Modify the outflow cup calibration standard material selection reference, see Appendix A;
--- Increase the standard outflow time calculation formula, see Appendix B;
--- Modify the original record and verification certificate format, see Appendix C and Appendix D.
The previous versions of this procedure are released as follows.
---JJG 743-1991.
Outflow cup viscometer verification procedure
1 Scope
This procedure applies to the flow-out cups of Tu-1, Tu-4, Portable Tu-4, ISO Series and Ford Series.
Viscosity meter (hereinafter referred to as viscometer) for the first verification, subsequent verification and in-use inspection.
2 reference files
This procedure refers to the following documents.
GB/T 1723 coating viscosity measurement method
GB/T 6753.4 Paint and varnish with outflow cup to determine the outflow time
Standard Test Method for Viscosity Determination by ASTMD1200 Ford Viscosity Cup Method (StandardTestMethodfor
ViscositybyFordViscosityCup)
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 Overview
Viscosity meter is the most widely used viscosity measuring equipment in the coating industry. It is economical and easy to operate.
specialty. Its working principle is to use the sample to generate flow under the action of its own gravity, with a certain amount of sample in a certain
The viscosity of the sample is described by the time that it flows out of the viscometer at temperature.
4 Metrological performance requirements
The first verification, subsequent verification and in-use inspection of the viscometer shall meet the requirements of Table 1.
Table 1 Measurement performance requirements
Viscometer
measuring
Repeatability
Correction factor
Recurrence
Correction factor
error
Tu-1, Tu-4, portable
Paint-4, Ford Series
ISO series
≤2% ≤3%
≤5%
≤3%
5 General technical requirements
The inner surface of the viscometer is smooth and must not have any willows and scratches.
The inner wall of the viscometer outflow pipe shall be smooth without burrs, and the connection between the outflow pipe and the inner wall of the cup shall be smooth, after replacing the outflow pipe
There must be no gaps.
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