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JJF 1792-2020 English PDF

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US$379.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1792-2020: Calibration Specification for Seawater pH Analyzers
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1792-2020	379	Add to Cart	4 days	Calibration Specification for Seawater pH Analyzers	Valid

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Basic data

Standard ID: JJF 1792-2020 (JJF1792-2020)
Description (Translated English): Calibration Specification for Seawater pH Analyzers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A61
Classification of International Standard: 17.020
Word Count Estimation: 17,190
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1792-2020: Calibration Specification for Seawater pH Analyzers

---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.
(Calibration specification for seawater pH meter) National Metrology Technical Specifications of the People's Republic of China Calibration specification for seawater pH meter 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation Calibration specification for seawater pH meter Focal point. National Technical Committee for Marine Special Measuring Instruments Drafting unit. National Marine Standards and Metrology Center This specification entrusts the National Technical Committee for Marine Special Measuring Instruments to be responsible for interpretation Drafters of this specification. Shi Chaoying (National Ocean Standard Metrology Center) Wang Cong (National Ocean Standard Metrology Center) Wang Aijun (National Ocean Standard Metrology Center)

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Overview (1) 4 Measurement characteristics (1) 5 Calibration conditions (1) 5.1 Calibration environmental conditions (1) 5.2 Measurement standards and other equipment (2) 6 Calibration items and calibration methods (2) 6.1 Calibration items (2) 6.2 Calibration method (2) 7 Expression of calibration results (3) 7.1 Calibration record (3) 7.2 Processing of calibration results (3) 8 Recalibration interval (4) Appendix A Special container for calibration of seawater pH meter (5) Appendix B Calibration Record Form of Seawater pH Meter (6) Appendix C Format of the inner page of the calibration certificate of seawater pH meter (8) Appendix D Measurement Uncertainty Evaluation Example of Calibration Results of pH Indication Error (9)

Introduction

This specification is based on JJF 1001-2011 "General Metrology Terms and Definitions", JJF 1059.1-2012 "Inaccurate Measurement Standardized Evaluation and Representation" and JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications" are the basic series of specifications Make it. This specification combines the development and application status of seawater pH measuring instruments, and refers to JJF 1547-2015 "Online pH Part of the content of the "Gauge Calibration Specification" will be formulated. This specification is released for the first time. Calibration specification for seawater pH meter

1 Scope

This specification applies to the calibration of seawater pH meters.

2 Reference documents

This specification refers to the following documents. JJF 1547-2015 Online pH Meter Calibration Specification HY/T 098-2007 Seawater pH meter testing method OIMLR54 (1980) pH value of aqueous solution (pHScaleforAqueousSolutions) For dated reference documents, only the dated version applies to this specification; for undated references The latest version (including all amendments) is applicable to this specification.

3 overview

The seawater pH meter refers to an instrument used to measure the pH value of seawater (hereinafter referred to as "meter"). Such instruments Composed of pH sensor, temperature probe and host, it can be directly placed in sea water for measurement, generally integrated in multi-parameter water quality On marine monitoring equipment such as instruments or buoys, it has the characteristics of online real-time continuous measurement without sampling. Based on electrochemistry The working principle of the basic measuring instrument is to convert the hydrogen ion concentration in seawater into the corresponding electrical signal through the sensing element. The pH value is displayed after analog-to-digital conversion and data processing.

4 Measurement characteristics

The measurement characteristics of the measuring instrument are listed in Table 1. Table 1 Measurement characteristics of the measuring instrument Item measurement performance 1 The error of pH indication should not exceed ±0.1 2 The pH indication error caused by temperature compensation should not exceed ±0.1 3 The temperature indication error should not exceed ±0.5℃ 4 The repeatability of pH indication should not exceed 0.03 Note. All the above indicators are not used as eligibility judgments, only for reference.

5 Calibration conditions

5.1 Calibration environment conditions Ambient temperature. (23±10)℃; Relative humidity. 20%~80%; ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1792-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1792-2020_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 JJF 1792-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1792-2020_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.