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JJF 1571-2016 English PDF

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JJF 1571-2016: Calibration Specification for Seawater Turbidity Analyzers
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Basic data

Standard ID JJF 1571-2016 (JJF1571-2016)
Description (Translated English) Calibration Specification for Seawater Turbidity Analyzers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A52
Classification of International Standard 17.060
Word Count Estimation 15,120
Date of Issue 2016-06-27
Date of Implementation 2016-09-27
Quoted Standard JJG 880-2006
Regulation (derived from) Notice of the General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China 2016 No.16
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to the calibration of seawater turbidity meter.

JJF 1571-2016: Calibration Specification for Seawater Turbidity Analyzers

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Calibration Specification for Seawater Turbidity Analyzers National Metrological Technical Code of the People's Republic of China Calibration standard for seawater turbidity meter 2016-06-27 released 2016-09-27 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Calibration standard for seawater turbidity meter Responsible unit. National Ocean Special Measuring Instruments Metrology Technical Committee Drafting unit. National Ocean Standard Metrology Center This specification entrusts the National Oceanic Metrology Apparatus Metrology Technical Committee to explain The drafters of this specification. Wang Aijun (National Ocean Standard Metrology Center) Wang Cong (National Marine Standard Metrology Center) Shi Chaoying (National Marine Standard Measurement Center)

table of Contents

Introduction (Ⅲ) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Metrological characteristics (2) 4.1 Zero drift (2) 4.2 Indication error (2) 4.3 Measurement Repeatability (2) 5 Calibration conditions (2) 5.1 Calibration of environmental conditions (2) 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 Calibration results (3) 7.1 Calibration records (3) 7.2 Calibration Result Processing (4) 8 Recurrence time interval (4) Appendix A Seawater Turbidity Calibrator Calibration Record Table (5) Appendix B Seawater Turbidity Calibrator Calibration Certificate Page Format (7) Appendix C Examples of measurement uncertainty for measurement error of seawater turbidity meter (8)

Introduction

This specification uses JJF 1001-2011 "General Metrology Terms and Definitions", JJF 1059.1-2012 "Measurement is incorrect The degree of assessment and representation "and JJF 1071-2010" national measurement calibration rules for the preparation of rules "as the basic series of norms To develop. This specification combines the development and use of seawater turbidity meter status, reference to the JJG880-2006 "turbidity meter" Part of the content to develop. This specification is the first release. Calibration standard for seawater turbidity meter

1 Scope

This specification applies to the calibration of seawater turbidity meters.

2 reference file

This specification refers to the following documents. JJG880-2006 turbidity meter For dated references, only the dated edition applies to this specification; references that are not dated , The latest version (including all modifications) applies to this specification.

3 Overview

The seawater turbidity meter (hereinafter referred to as the instrument) is used to measure the insoluble particulate matter suspended in seawater. The degree of light scattering, and quantitative characterization of these suspended particulate matter content. This type of instrument is connected to the host by a turbo sensor via a watertight connector and can be placed directly in seawater. Prepared, generally integrated in the temperature and salt depth meter or buoy and other marine observation equipment, with in situ real-time continuous measurement, do not need Sampling and other characteristics. Turbidity sensor is composed of light source emission system, photoelectric detection system, its working principle is the light source was The tapered area emits a specific wavelength of light to illuminate the sea, and the particle size, shape and reflectivity of the particles in the sea will affect the light The degree of scattering, and the light source on the same side of the photoelectric detection system can receive the back scattered light, and convert it into a photoelectric signal, And then by the host of the photoelectric signal for analog and digital data conversion and display the turbidity value, the unit NTU. among them, The light source of the turbidity sensor has a lateral direction (see Fig. 1) and a vertical downward (see Fig. 2). Figure 1 Lateral light-emitting seawater turbidity meter, light source area (cone) and detector receiving area (rectangular) schematic

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