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JJF 1575-2016 English PDF

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JJF 1575-2016: Program of Pattern Evaluation of Laboratory pH Meters
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Basic data

Standard ID JJF 1575-2016 (JJF1575-2016)
Description (Translated English) Program of Pattern Evaluation of Laboratory pH Meters
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17.020
Word Count Estimation 24,268
Date of Issue 2016-06-27
Date of Implementation 2016-09-27
Quoted Standard JJG 119-2005; GB/T 11165-2005
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 classification of laboratory pH (acidity) for the classification of 46080500.

JJF 1575-2016: Program of Pattern Evaluation of Laboratory pH Meters

---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.
Program of Pattern Evaluation of Laboratory pH Meters National Metrological Technical Code of the People's Republic of China Laboratory pH (acidity) type evaluation outline 2016-06-27 released 2016-09-27 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Laboratory pH (acidity) Type evaluation outline Responsible unit. National Physical and Chemical Metrology Technical Committee The main drafting unit. China Institute of Metrology Xinjiang Uygur Autonomous Region Metrology and Testing Institute Participated in the drafting unit. Shaanxi Institute of Metrology This specification entrusts the National Physical Chemistry Metrology Technical Committee to explain The main drafters of this specification. Xiu Hongyu (China Institute of Metrology) Wang Jinrong (Xinjiang Uygur Autonomous Region Measurement and Testing Institute) Participate in the drafters. He Xinyang (China Institute of Metrology) Tahir Slavic force (Xinjiang Uygur Autonomous Region Measurement and Testing Institute) Sun Xirong (Shaanxi Institute of Metrology)

table of Contents

Introduction (II) 1 Scope (1) 2 References (1) 3 Overview (1) 4 legal management requirements (1) 4.1 Unit of measurement (1) 4.2 Accuracy class (1) 4.3 logo (1) 5 Metering requirements (2) 5.1 Electricity indication error (2) 5.2 Input current (2) 5.3 Input impedance caused by the indication error (2) 5.4 Indication error caused by temperature compensator (2) 5.5 Repetitive value of electricity meter (2) 5.6 Instrument indication error (2) 5.7 Repetition of instrument indication (2) 6 General technical requirements (3) 6.1 Appearance and preliminary inspection (3) 6.2 power supply voltage changes on the impact of electricity (3) 6.3 Environmental temperature on the impact of electricity meter deviation (3) 6.4 Electricity indication stability (3) 7 type evaluation item table (3) 8 Technical data and test samples to be submitted by the applicant unit (4) 8.1 Technical information submitted (4) 8.2 the number of samples provided and the use of the prototype (4) 9 Test methods and conditions for the type of evaluation project and data processing and eligibility criteria (5) 9.1 Measurement performance test (5) 9.2 General technical requirements test (9) 10 type evaluation result judgment (10) 11 Measuring instruments and equipment for test items (11) Appendix A Type Evaluation Original Record Format (12)

Introduction

This specification is based on JJF 1015-2014 "General Specification for Metrological Apparatus Evaluation" and JJF 1016-2014 " Instrument type evaluation outline preparation guidelines "for the development of basic norms. The technical indicators and test methods of this specification refer to JJG119-2005 "Laboratory pH (acidity)", GB/T 11165-2005 "laboratory pH meter" and other technical documents. This specification is the first release. Laboratory pH (acidity) type evaluation outline

1 Scope

This specification applies to the classification of laboratory pH (acidity) for classifications of 46080500.

2 reference file

This specification refers to the following documents. JJG119-2005 laboratory pH (acidity) meter Laboratory pH meter GB/T 11165-2005 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

Laboratory pH (pH) (hereinafter referred to as the instrument) is a potential method to measure the pH of the aqueous solution of electrochemistry Analytical instruments, usually by the pH meter (secondary instrument) and pH electrode unit (sensor) two parts. The electrical unit (hereinafter referred to as the meter) consists of impedance converters, amplifiers, function adjusters and displays The electrode unit (hereinafter simply referred to as an electrode) includes an indicating electrode and a reference electrode. The most commonly used indicator electrodes are glass Electrode, hydrogen electrode, hydroquinone electrode, antimony electrode, etc., the reference electrode mainly silver/silver chloride electrode, calomel electrode. pH composite electrode is the combination of the indicator electrode and the reference electrode, easy to use. The instrument was measured by comparative method Liquid pH. first with the indicator electrode, the reference electrode and pH standard buffer solution composed of the battery, the electromotive force input power The instrument is "calibrated". And then replaced with the measured solution and the same pair of electrodes composed of batteries, battery electromotive force also lose Into the electricity meter. By comparison, the electricity meter display value is the pH of the measured solution. Key components of the instrument include impedance converters and amplifiers.

4 legal management requirements

4.1 Unit of measurement The instrument shall be in the legal unit of measurement. 4.2 Accuracy class The instrument is classified according to its minimum index (or minimum display unit value) and the corresponding requirements (with maximum allowable error) 0.2, 0.1, 0.02, 0.01, 0.001. 4.3 logo The instrument should be on the nameplate, the nameplate should be marked. manufacturer name; product name and model; manufacturing year, month; No. measurement range; rating of measuring instruments; CMC mark and number. The prototype should be reserved for the CMC logo And the number of locations.

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