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JJG 289-2019 English PDF

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JJG 289-2019: Bucket Thermometers
Status: Valid

JJG 289: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 289-2019English339 Add to Cart 3 days [Need to translate] Bucket Thermometers Valid JJG 289-2019
JJG 289-2005English479 Add to Cart 3 days [Need to translate] Verification Regulation of Bucket Thermometers Obsolete JJG 289-2005
JJG 289-1982English359 Add to Cart 3 days [Need to translate] Verification Regulation of Surface Thermometer Obsolete JJG 289-1982

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Basic data

Standard ID JJG 289-2019 (JJG289-2019)
Description (Translated English) Bucket Thermometers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A54
Classification of International Standard 17.200
Word Count Estimation 15,170
Date of Issue 2019
Date of Implementation 2020-03-31
Issuing agency(ies) State Administration for Market Regulation

JJG 289-2019: Bucket Thermometers

---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.
(Verification Regulation of Surface Water Temperature Meter) National Measurement Verification Regulations of the People's Republic of China Surface water temperature gauge Published on December 31,.2019 2020-03-31 Implementation Issued by the State Administration of Market Supervision and Administration Verification Regulation of Surface Water Temperature Meter Replace JJG 289-2005 Focal point. National Technical Committee for Measuring Special Marine Measuring Instruments Main drafting unit. East China Sea Standard Metrology Center, State Oceanic Administration Participated in the drafting unit. National Marine Standards Measurement Center South China Sea Standard Metrology Center of State Oceanic Administration This Regulation is entrusted to the National Technical Committee for Measuring Special Marine Instruments for interpretation The main drafters of this regulation. Zhao Xiuling (National Oceanic Administration East China Sea Standard Metrology Center) Zhu Hong (Donghai Standard Metrology Center, State Oceanic Administration) Li Shuqing (National Oceanic Administration East China Sea Standard Metrology Center) Participating drafters. Zhu Haiqing (National Ocean Standard Metrology Center) Solelli (National Marine Standard Metrology Center) Li Fan (South China Sea Standard Metrology Center, State Oceanic Administration) Huang Yafei (South China Sea Standard Metrology Center, State Oceanic Administration)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Terms and units of measurement (1) 3.1 Terminology (1) 3.2 Unit of measurement (1) 4 Overview (1) 5 Measurement performance requirements (2) 6 General technical requirements (3) 6.1 Appearance (3) 6.2 Security (3) 6.3 Dimensions and markings (3) 7 Control of measuring instruments (4) 7.1 Verification conditions (4) 7.2 Verification items (4) 7.3 Verification method (5) 7.4 Processing of verification results (5) 7.5 Verification period (5) Appendix A Reference Format of Calibration Record Form (6) Appendix B. Reference Format of Information on the Internal Page of the Certificate of Verification/Certificate of Verification (8)

Introduction

This regulation is a revision of JJG 289-2005 "Surface Water Temperature Meter". In reference to JJG 130-2011 "Work Glass Liquid Thermometer", HY/T 017-1992 "Surface Water Temperature Meter", JJF1030-2010 "Constant Temperature Bath Technology" Performance Test Specification", JJF1094-2002 "Measurement Instrument Characteristics Evaluation", JJF1059.1-2012 "Inaccurate Measurement" On the basis of technical documents such as ``Quality Assessment and Representation'', combined with the current status of the use of surface water temperature gauges in the marine field, this regulation was determined Process measurement performance requirements and verification methods. Compared with JJG 289-2005, the main technical changes of this regulation are as follows. --- Added reference file (see 2); --- Increase terminology and unit of measurement (see 3); --- Modified the requirements of the measuring standard and the main supporting equipment (see 7); --- Modify the reading requirements, increase the indication value correction method, etc. (see 7); --- Modified the verification record format (see Appendix A); --- Modified the information and format of the pages of the certificate of verification/certification result notice (see Appendix B). The release of previous versions of this regulation. ---JJG 289-2005. Verification Regulation of Surface Water Temperature Meter

1 Scope

This regulation is applicable to the first verification, subsequent verification and in-use inspection of surface water temperature gauges.

2 Reference documents

This regulation refers to the following documents. JJG 130-2011 working glass liquid thermometer For dated references, only the dated versions are applicable to this Regulation; for those without dates The latest version (including all amendments) is applicable to this regulation.

3 Terms and units of measurement

3.1 Terminology 3.1.1 Total-immersionthermometer When the temperature-sensing bubble of the thermometer and all temperature-sensing liquid columns are immersed in the temperature-sensing medium, and the upper end of the temperature-sensing liquid column is Only when the qualitative surface is at the same level, can the glass liquid thermometer display the temperature indication correctly. [JJG 130- 2011,3.13] Note. In actual use, the upper end surface of the temperature sensing liquid column of the full immersion thermometer can be exposed within 10mm of the surface of the measured medium to facilitate Read the indication. 3.1.2 exposed-liquidcolumn During the measurement of the thermometer, the liquid column exposed outside the measured medium. [JJG 130-2011,3.15] 3.2 Unit of measurement Temperature unit. Celsius, symbol. ℃.

4 Overview

The surface water temperature gauge is composed of a metal shell and a full immersion thermometer (referred to as "thermometer"). Metal shell The ring, watch tube and water storage tube, etc., whose structure is shown in Figure 1.Thermometer consists of internal standard glass mercury thermometer and copper cap Composition, its structure is shown in Figure 2. The working principle of the surface water temperature meter is to put the surface water temperature meter into the water and wait for it to reach thermal equilibrium with the external water. After that, quickly raise the water surface reading. Due to the heat capacity of the water in the shell of the water tank The degree indication does not change quickly. Surface water temperature gauge is mainly used to measure the surface water temperature of ocean, lake, river, reservoir, pond and so on. Thermometer measurement The range is (-5~40)℃, and the division value is 0.2℃. The thermometer can withstand the sudden change of temperature of 50℃. For inspection It is convenient for setting and maintenance, you can open the shell of the surface water temperature meter and take out the thermometer conveniently.

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Question 5: Should I purchase the latest version JJG 289-2019?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 289-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.