Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

JJF 1793-2020 English PDF

Q: How long will the true-PDF of English version of JJF 1793-2020 be delivered?

Upon your order, we will start to translate JJF 1793-2020_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.

Q: Can I share the purchased PDF of JJF 1793-2020_English with my colleagues?

Yes. The purchased PDF of JJF 1793-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Q: Does the price include tax/VAT?

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). Avoidance of Double Taxation Agreements (DTAs) between Singapore and 100+ Countries: https://www.iras.gov.sg/taxes/international-tax

Q: Do you accept my currency other than USD?

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.

US$379.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1793-2020: Calibration Specification for Seawater Nutrients Analyzers
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1793-2020	379	Add to Cart	4 days	Calibration Specification for Seawater Nutrients Analyzers	Valid

Similar standards

JJG 879 JJF 1106 JJG 810 JJF 2003 JJF 2002 JJF 1796

Basic data

Standard ID: JJF 1793-2020 (JJF1793-2020)
Description (Translated English): Calibration Specification for Seawater Nutrients Analyzers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A60
Classification of International Standard: 17.180
Word Count Estimation: 17,173
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1793-2020: Calibration Specification for Seawater Nutrients 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 nutrient measuring instrument) National Metrology Technical Specifications of the People's Republic of China Calibration specification for seawater nutrient salt meter 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation Sea water nutrient salt meter Calibration specification 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 of Marine Special Measuring Instruments to be responsible for interpretation Drafters of this specification. Wang Cong (National Ocean Standard Metrology Center) Shi Chaoying (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) 4.1 Detection limit (1) 4.2 Indication error (1) 4.3 Measurement repeatability (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 Calibration result processing (3) 8 Recalibration interval (4) Appendix A Calibration Record Form of Seawater Nutrient Salt Meter (5) Appendix B The format of the inner page of the calibration certificate of the seawater nutrient salt meter (7) Appendix C Measurement Uncertainty Evaluation Example of Calibration Results of Nutrient Salt Concentration Indication Error (8)

Introduction

This specification is based on JJF 1001-2011 "General Metrology Terms and Definitions", JJF 1059.1-2012 "Inaccurate Measurement "Quality 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 nutrient salt measuring instruments, and refers to HY/T 099-2007 seawater Part of the content of the detection method of the nutrient salt meter is formulated. This specification is released for the first time. Calibration specification for seawater nutrient salt meter

1 Scope

This specification is applicable to the calibration of nutrient salt meters used in marine field.

2 Reference documents

This specification refers to the following documents. HY/T 099-2007 seawater nutrient salt measuring instrument testing method 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 nutrients referred to in this specification are nitrate, nitrite, ammonia-nitrogen, phosphate and silicate in seawater. Inorganic salts needed for the growth of foreign plants. Seawater nutrient salt measuring instrument (hereinafter referred to as "measuring instrument") is used to measure the nutrient salt concentration in seawater on-site, which can Automatic or semi-automatic injection, quantitative addition of reagents, chemical reactions and measurement. The measuring instrument mostly adopts the colorimetric method. Measure the degree of absorption of light waves by sea water samples, and analyze the nutrient concentration of sea water samples.

4 Measurement characteristics

4.1 Detection limit Nitrate-nitrogen should not exceed 4μg/L; nitrite-nitrogen and phosphate-phosphorus should not exceed 1μg/L; ammonia-nitrogen should not exceed More than 3μg/L; silicate-silicon should not exceed 6μg/L. 4.2 Indication error Relative error of indication. nitrate-nitrogen, nitrite-nitrogen, phosphate-phosphorus, silicate-silicon should not exceed the measured value ±10% of the measured value; ammonia-nitrogen should not exceed ±15% of the measured value. When the indication value of the measuring instrument is within 10% of its measuring range, the indication error of nitrate-nitrogen and ammonia-nitrogen should not exceed 5μg/L; nitrite-nitrogen, phosphate-phosphorus, silicate-silicon should not exceed ±3μg/L. 4.3 Measurement repeatability Nitrate-nitrogen, nitrite-nitrogen, phosphate-phosphorus, silicate-silicon and ammonia-nitrogen measurement repeatability should not be greater than 3%. Note. All the above indicators are not used as eligibility judgments, only for reference.

5 Calibration conditions

5.1 Calibration environment conditions Ambient temperature. (20±5)℃; Relative humidity. 20%~80%; Others. There is no mechanical vibration or electromagnetic interference that affects the normal operation of the measuring instrument. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1793-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1793-2020_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 1793-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1793-2020_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.