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JJF 1674-2017 English PDF

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JJF 1674-2017: Calibration Specification for Alarmer Detectors of Benzene
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Basic data

Standard ID JJF 1674-2017 (JJF1674-2017)
Description (Translated English) Calibration Specification for Alarmer Detectors of Benzene
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17.020
Word Count Estimation 17,144
Date of Issue 2017-11-20
Date of Implementation 2018-02-20
Regulation (derived from) AQSIQ Notice 2017 No. 103
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to the calibration of benzene gas detection alarms (hereinafter referred to as instruments) whose measurement upper limit does not exceed 100 ��mol/mol.

JJF 1674-2017: Calibration Specification for Alarmer Detectors of Benzene

---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.
(Benzene gas detection alarm calibration specification) People's Republic of China National Measurement Specifications Benzene gas detection alarm calibration specification Calibration Specification for Alarmer Dectectors of Benzene 2017-11-20 Posted 2018-02-20 implementation General Administration of Quality Supervision, Inspection and Quarantine released Benzene gas detection alarm calibration specification The focal point. National Environmental Chemistry Metering Technology Committee The main drafting unit. Gansu Institute of Metrology Jinan Mayor Qing computer application company Jining Institute of Measurement and Testing Participated in the drafting unit. China Institute of Metrology China Test Technology Research Institute Huarui Scientific Instruments (Shanghai) Co., Ltd. This specification entrusts the National Environmental Chemistry Metrology Technical Committee responsible for the interpretation The main drafters of this specification. Shi Li (Gansu Institute of Metrology) Yuezong Long (Jinan Mayor Qing computer application company) Zhu Quan (Jining Institute of Measurement and Testing) Participate in the drafters. Li Shiliang (China Institute of Metrology) Jun-Tao Yang (Gansu Institute of Metrology) Wang Xinping (China Institute of Test Technology) Li Enhua [Huarui Scientific Instruments (Shanghai) Co., Ltd.]

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 Overview (1) 3 Measurement Characteristics (1) 3.1 indication error (1) 3.2 Repeatability (1) 3.3 Response Time (1) 3.4 alarm function (1) 3.5 Drift (1) 4 calibration conditions (1) 4.1 Environmental conditions (1) 4.2 Calibration of measuring instruments and ancillary equipment (2) 5 Calibration Items and Calibration Methods (2) 5.1 indication error (2) 5.2 Repeatability (2) 5.3 Response Time (3) 5.4 Alarm function (3) 5.5 Drift (3) 6 Calibration Results Expression (3) 7 re-school interval (4) Appendix A benzene gas detection alarm calibration records (5) Appendix B certificate page format (6) Appendix C Calibration error evaluation results of the uncertainty rating (7) Appendix D Relative indication error calibration results of the uncertainty assessment (10)

Introduction

The specification measurement characteristics of the reference to the GB 12358-2006 "workplace environmental gas detection alarm General technical requirements ", GB 50493-2009" petrochemical flammable gas and toxic gas detection and alarm design specifications " And other technical regulations. This specification is first released. Benzene gas detection alarm calibration specification

1 Scope

This standard applies to the measurement limit of not more than 100μmol/mol benzene gas detection alarm (hereinafter referred to as instrument Device) calibration.

2 Overview

Instrument is mainly used for workplace benzene gas detection and other environments, usually photoionization (PID) detection principle And semiconductor detection theory. Instrument mainly by the detection components, amplification circuits, alarm systems, monitors and other components. Photon ionization (PID) detection principle refers to the gas under test in the ionization of ultraviolet light generated negative charge Charged electrons and positively charged ions form a weak current under the action of an electric field. The magnitude of this current is positively correlated with the concentration of gas. Now the detection of gas concentrations. Semiconductor detection principle is the use of semiconductor gas sensors contact with the gas, its conductivity and so on The physical properties change to detect the concentration of the characteristic gas. Instrument types are fixed and portable, sampling methods are diffused and inhaled.

3 measurement characteristics

3.1 indication error Indication error does not exceed the provisions of Table 1. Table 1 shows the value of error Measuring range/(μmol/mol) Indication error 0 ~ 10 ± 1.0μmol/mol > 10 ~ 100 ± 10% 3.2 Repeatability Repeatability of not more than 3%. 3.3 Response time Response time is not greater than 60s. 3.4 alarm function Has the alarm function of the instrument, in its measurement range should have the alarm set value, when the instrument reaches the alarm set value Set value, should be able to automatically alarm. 3.5 Drift 3.5.1 Zero drift ± 3% FS 3.5.2 Range Drift. ± 5% FS Note. The above indicators are not for the qualification, for reference only.

4 calibration conditions

4.1 Environmental conditions 4.1.1 Ambient temperature (0 ~ 40) ℃.

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