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JJG 288-2024 English PDF

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Q: Should I purchase the latest version JJG 288-2024?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 288-2024 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.

US$619.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 288-2024: Reversing Thermometers
Status: Valid

JJG 288: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 288-2024	619	Add to Cart	5 days	Reversing Thermometers	Valid
JJG 288-2005	919	Add to Cart	4 days	Verification Regulation of Deep Sea Reversing Thermometers	Obsolete
JJG 288-1982	519	Add to Cart	4 days	Verification Regulation of Deep Sea Reversing Thermometer	Obsolete

Basic data

Standard ID: JJG 288-2024 (JJG288-2024)
Description (Translated English): Reversing Thermometers
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 30,353
Date of Issue: 2024-06-14
Date of Implementation: 2024-12-14
Issuing agency(ies): State Administration for Market Regulation
Summary: This standard applies to the initial calibration, subsequent calibration, and in-use inspection of closed-end inversion thermometers and open-end inversion thermometers.

JJG 288-2024: Reversing 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.
National Metrology Verification Regulations of the People's Republic of China Inverted temperature scale Released on 2024-06-14 Implementation on 2024-12-14 The State Administration for Market Regulation issued Verification procedures for inverted thermometers Replaces JJG 288-2005 Responsible unit. National Technical Committee for Measurement of Marine Special Measuring Instruments Main drafting unit. National Marine Standards and Metrology Center Participating in the drafting. North Sea Standards and Metrology Center of the State Oceanic Administration State Oceanic Administration East China Sea Standards and Metrology Center South China Sea Standards and Metrology Center of State Oceanic Administration This regulation is entrusted to the National Technical Committee for Measurement of Marine Special Measuring Instruments for interpretation The main drafters of this regulation are. Mu Minghua (National Marine Standards and Metrology Center) Zhao Zhuoying (National Marine Standards and Metrology Center) Lin Xuhao (National Marine Standards and Metrology Center) Participating drafters. Li Mingjun (Beihai Standards and Metrology Center, State Oceanic Administration) Li Shuqing (East China Sea Standards and Metrology Center, State Oceanic Administration) Yan Tian (South China Sea Standards and Metrology Center, State Oceanic Administration) Zhao Xiuling (East China Sea Standards and Metrology Center, State Oceanic Administration)

Introduction (II) 1 Scope(1) 2 References(1) 3 Terms and definitions (1) 4 Overview(2) 4.1 Principle (2) 4.2 Structure (2) 5 Metrological performance requirements (3) 5.1 Indication error requirements (4) 5.2 Pressure coefficient requirements (4) 6 General technical requirements (4) 6.1 Appearance(4) 6.2 V0 value and ring (5) 6.3 Closed-end inverted thermometer pressure resistance (5) 7 Measuring instrument control (5) 7.1 Verification conditions (5) 7.2 Verification Items (7) 7.3 Verification methods (7) 7.4 Processing of verification results (10) 7.5 Verification cycle (10) Appendix A Example of uncertainty assessment of temperature measurement results using an inverted thermometer (11) Appendix B Example of uncertainty assessment of pressure coefficient verification results for an open-end inverted thermometer (14) Appendix C Temperature calculation method according to ITS-90 (16) Appendix D Format of the pressure coefficient calibration record for the thermometer with reversed start (19) Appendix E Inverted Temperature Display Value Verification Record Table (21) Appendix F Inverted Temperature Table V0 Value Record Table (22) Appendix G Verification Certificate Inner Page Format (23) Appendix H Format of the inner page of the verification result notification (24)

Introduction

JJF1001-2011 "General metrological terms and definitions", JJF1002-2010 "National metrological verification procedures The JJF1059.1-2012 “Evaluation and Expression of Uncertainty in Measurement” together constitute the basis for the formulation of this regulation. Series specifications. This regulation is revised on the basis of JJG 288-2005 "Inverted Temperature Table". Compared with JJG 288-2005, In addition to editorial changes, the main changes are as follows. --- Added terms and definitions (see Chapter 3); --- Modified the classification and table details of the standards used in the verification, and added auxiliary standard instruments (see 7.1.1, 7.1.2); --- Modified the verification method of V0 value (see 7.3.3); --- Added the description of uncertainty (see Appendix A and Appendix B); --- Deleted the indication stability and operational adaptability parts; --- Modified the verification record format (see Appendix D, Appendix E, Appendix F); --- Modified the information and format of the inner pages of the verification certificate/verification result notification (see Appendix G and Appendix H). The previous versions of this regulation are as follows. ---JJG 288-2005. Verification procedures for inverted thermometers

1 Scope

This procedure applies to the initial verification, subsequent verification and in-use verification of closed-end inversion thermometers and open-end inversion thermometers. examine.

2 References

This specification refers to the following documents. JJG 161-2010 Standard mercury thermometer JJF1059.1-2012 Evaluation and Expression of Measurement Uncertainty JJF1094-2002 Measurement Instrument Characteristics Evaluation HY/T 007-1992 Inverted thermometer For any referenced document with a date, only the version with the date noted is applicable to this Regulation. The latest version (including all amendments) shall apply to this regulation.

3 Terms and definitions

3.1 reversing thermometer A special mercury-in-glass thermometer for measuring sea temperature and depth. The outer casing is completely closed and the height of the mercury column of the main and auxiliary thermometers is not affected by the water pressure. There is an opening at one end of the outer tube, and water can flow into the outer tube. The height of the mercury column of the main and auxiliary thermometers depends on the water. Inverted thermometer of temperature and pressure. 3.4 Mainthermometer The thermometer is encapsulated in an inverted thermometer sleeve and has special structures such as blind branches and rings. The state is flipped 180° to reach the reading state. 3.5 Auxiliarythermometer An ordinary mercury thermometer enclosed in the outer sleeve is used to read the outer sleeve temperature when the main temperature is indicated. 3.6 Upright The storage bulb of the inverted thermometer is facing downward and vertically to the ground, also known as the temperature sensing state. 3.7 Reversed The state in which the storage bulb of an inverted thermometer is upward and vertical to the ground is also called the reading state. 3.8 Toright The process of turning an inverted thermometer to an upright position. 3.9 Reflux Drain When the thermometer is reversed, the mercury flows from the receiving bulb back to the mercury in the storage bulb and combines into a whole. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 288-2024_English be delivered?

Answer: Upon your order, we will start to translate JJG 288-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 288-2024_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 288-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 288-2024?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 288-2024 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.