JJG 763-2019 English PDFUS$509.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. JJG 763-2019: CTD Measuring Instrument Status: Valid JJG 763: Historical versions
Basic dataStandard ID: JJG 763-2019 (JJG763-2019)Description (Translated English): CTD Measuring Instrument Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A54 Classification of International Standard: 17.200 Word Count Estimation: 22,237 Date of Issue: 2019 Date of Implementation: 2020-03-27 Issuing agency(ies): State Administration for Market Regulation JJG 763-2019: CTD Measuring Instrument---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.CTD Measuring Instrument National Measurement Verification Regulations of the People's Republic of China Temperature and salt depth measuring instrument 2019-09-27 release 2020-03-27 Implementation Issued by the State Administration of Market Supervision and Administration Verification Regulation of Temperature and Salt Depth Measuring Instrument Replace JJG 763-2002 Focal point: National Technical Committee for Measuring Special Marine Measuring Instruments Drafting unit: National Marine Standards Measurement Center This Regulation is entrusted to the National Technical Committee for Measuring Special Marine Instruments for interpretation Drafters of this regulation: Solelli (National Marine Standard Metrology Center) Zhu Haiqing (National Ocean Standard Metrology Center) Wang Jun (National Ocean Standard Metrology Center) table of ContentsIntroduction (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 (2) 7 Control of measuring instruments (3) 7:1 Verification conditions (3) 7:2 Verification items (4) 7:3 Verification method (4) 7:4 Processing of verification results (7) 7:5 Verification period (7) Appendix A Reference Format of Calibration Record Form (8) Appendix B: Reference Format of Information on the Internal Page of the Certificate of Verification/Certificate of Verification (14) Appendix C Conversion formula for salinity and conductivity (16)IntroductionCompared with JJG 763-2002, in addition to editorial amendments, the changes in relevant technical parts of this regulation are as follows: --- Added reference documents (see Chapter 2); --- Added terms and units of measurement (see Chapter 3); --- Revised the principle construction purpose and structure schematic diagram of the instrument (see Chapter 4); --- Modify the instrument measurement performance requirements (see Chapter 5); --- Modified the general technical requirements (see Chapter 6); --- Modified the requirements and verification methods of the measuring standard used in the pressure verification (see Chapter 7); --- Modified the verification record format (see Appendix A); --- Modified the information and format of the inner page of the certification certificate/certification result notice (see Appendix B); --- Refined the conversion formula of salinity and conductivity (see Appendix C); --- Deleted Appendix B of JJG 763-2002: The release of previous versions of this regulation: --- JJG 763-2002: Verification Regulation of Temperature and Salt Depth Measuring Instrument1 ScopeThis regulation is applicable to the first verification, subsequent verification and in-use inspection of the temperature and salt depth measuring instrument:2 Reference documentsThis regulation refers to the following documents: JJG 875 digital pressure gauge 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 measurement3:1 Terminology 3:1:1 conductivity-temperature-depthmeasuringinstrument; CTD An instrument that can automatically measure seawater temperature, conductivity (or salinity) and depth: 3:1:2 Conductivity of seawater The physical quantity of the electrical conductivity of seawater is defined as a length of 1m and a cross-sectional area of 1m2: Salinity, temperature, pressure and other factors are related: 3:2 Unit of measurement Temperature unit: Celsius, the symbol is ℃: Conductivity unit: west [menzi] per meter, symbol is S/m; milli-xi [menzi] per cent, symbol is mS/cm: Pressure unit: Pa [Sca], the symbol is Pa:4 OverviewThe temperature and salt depth measuring instrument (hereinafter referred to as CTD) is mainly used for on-site measurement of seawater temperature, conductivity (salinity) and Depth elements can be divided into two types, self-contained and direct-reading, according to different recording forms: Self-contained CTD with memory and unique After the measurement is completed, the data is read in the laboratory, which is usually used for a long time in the shallow coastal area; direct reading The underwater unit of the CTD has no memory and independent power supply, and its power supply is powered by the water unit on the deck through the armor Cable supply, the parameters measured by the underwater machine are transmitted to the water machine for display and recording in real time, often combined with multi-channel sampler Surface rapid measurement, mainly used in the short-term use of each site of large-scale marine scientific research activities: The shape structure of self-contained CTD and direct reading CTD are basically the same: As shown: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JJG 763-2019_English be delivered?Answer: Upon your order, we will start to translate JJG 763-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JJG 763-2019_English with my colleagues?Answer: Yes. The purchased PDF of JJG 763-2019_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+ countriesQuestion 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 763-2019?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 763-2019 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. |