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JJF 2068-2023 English PDF

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JJF 2068-2023: Calibration Specification for Cone Calorimeters
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JJF 2068-2023English369 Add to Cart 4 days [Need to translate] Calibration Specification for Cone Calorimeters Valid JJF 2068-2023

Standard similar to JJF 2068-2023

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Basic data

Standard ID JJF 2068-2023 (JJF2068-2023)
Description (Translated English) Calibration Specification for Cone Calorimeters
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 18,157
Date of Issue 2023-10-12
Date of Implementation 2024-04-12
Issuing agency(ies) State Administration for Market Regulation

JJF 2068-2023: Calibration Specification for Cone Calorimeters

---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.
National Metrology Technical Specifications of the People's Republic of China Cone Calorimeter Calibration Specifications Released on 2023-10-12 Implemented on 2024-04-12 Released by the State Administration for Market Regulation Cone Calorimeter Calibration Specifications Responsible unit: National New Materials and Nano Metrology Technical Committee Main drafting unit: National Defense Science and Technology Industrial Applied Chemistry Level 1 Metrology Station Participating units in the drafting: Tianjin Fire Research Institute of the Ministry of Emergency Management This specification is entrusted to the National New Materials and Nano Metrology Technical Committee to be responsible for interpretation: The main drafters of this specification: Wang Kang (National Defense Science and Technology Industry Applied Chemistry Level 1 Metrology Station) Zhao Hua (National Defense Science and Technology Industry Applied Chemistry Level 1 Metrology Station) Participating drafters: Liu Yunchuan (National Defense Science and Technology Industry Applied Chemistry Level 1 Metrology Station) Wang Junsheng (Tianjin Fire Research Institute, Ministry of Emergency Management)

Table of contents

Introduction(Ⅱ) 1 Scope(1) 2 Cited documents(1) 3 Terminology and units of measurement(1) 4 Overview(1) 5 Measuring characteristics(2) 6 Calibration conditions(2) 6:1 Environmental conditions(2) 6:2 Measurement standards and other equipment(2) 7 Calibration items and calibration methods (2) 7:1 Quality indication error and repeatability (2) 7:2 Radiation illumination indication error (3) 7:3 Heat release rate indication error and repeatability (3) 8 Uncertainty evaluation of indication error (4) 9 Calibration result expression (4) 10 Recalibration time interval(5) Appendix A Example of uncertainty assessment of indication error calibration results (6) Appendix B Cone Calorimeter Calibration Record Reference Format (11) Appendix C Cone Calorimeter Calibration Certificate (Inside Page) Reference Format (13)

Introduction

JJF 1071 "Rules for Writing National Measurement Calibration Specifications", JJF 1001 "General Measurement Terms and Definitions" and JJF 1059:1 "Evaluation and Expression of Measurement Uncertainty" together constitute the basic series supporting the formulation of this specification: specification: The preparation of this specification mainly refers to GB/T 16172-2007 "Test Method for Heat Release Rate of Building Materials", ISO 5660-1:2015 "Reaction to fire test heat release smoke production and mass loss rate Part 1: Heat release Rate (cone calorimeter method) and smoke generation rate (dynamic test)》 [Reaction-to-firetests-Heatre- Balance", JJF (Military Industry) 39-2014 "(5~400)W/cm2 Radiant Heat Flow Sensor Calibration Specifications": This specification is released for the first time: Cone Calorimeter Calibration Specifications

1 Scope

This specification is applicable to the calibration of cone calorimeters with a heat release rate measurement range of (1~12)kW:

2 cited documents

There are no referenced documents in this specification:

3 Terminology and units of measurement

3:1 Heat release rate heatreleaserate Under the specified test conditions, the heat released by the combustion of the material per unit time, the unit is kW:

4 Overview

Cone calorimeter is mainly used to measure the heat release performance of materials: It is used in material evaluation, flame retardant mechanism research, and fire prevention: It is widely used in defense and other aspects: The cone calorimeter is based on the principle of oxygen consumption, that is, the net combustion heat of the material and the oxygen consumed by combustion Proportional to the mass, the material is calculated by measuring the mass of oxygen consumed by the material burning under specified thermal radiation conditions: heat release rate: Cone calorimeter mainly consists of combustion chamber, weighing system, radiation system, exhaust system, oxygen analysis System, methane combustion system and data acquisition and analysis system: Its structural diagram is shown in Figure 1: a) Front view b) Side view Figure 1 Schematic diagram of a typical structure of a cone calorimeter 1-dehumidifier and CO2 filter; 2-fan; 3-orifice flow meter; 4-ring sampler; 5-smoke hood; 6-radiation cone; 7-Sample mounting frame; 8-Weighing device; 9-Oxygen analyzer; 10-Igniter; 11-Methane burner

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