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JJF 1697-2018 English PDF

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JJF 1697-2018: Program of Pattern Evaluation of Differential Scanning Calorimeters
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1697-2018	English	509	Add to Cart	4 days [Need to translate]	Program of Pattern Evaluation of Differential Scanning Calorimeters	Valid	JJF 1697-2018

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Basic data

Standard ID	JJF 1697-2018 (JJF1697-2018)
Description (Translated English)	Program of Pattern Evaluation of Differential Scanning Calorimeters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A61
Word Count Estimation	22,237
Date of Issue	2018-02-27
Date of Implementation	2018-05-27
Regulation (derived from)	AQSIQ Announcement No. 26 of 2018
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine

JJF 1697-2018: Program of Pattern Evaluation of Differential Scanning 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.
(Differential scanning calorimeter type evaluation outline) National Metrology Technical Specification of the People's Republic Differential Scanning Calorimeter Type Evaluation Outline Published on.2018-02-27 2018-05-27 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Focal Point. National Physical and Chemical Metrology Technical Committee Drafted by. China Institute of Metrology This specification entrusts the National Physical and Chemical Measurement Technical Committee to explain The main drafters of this specification. Li Jia (China Institute of Metrology) Wang Haifeng (China Institute of Metrology) Participate in the drafters. Sun Guohua (China Institute of Metrology)

Introduction (II) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Legal management requirements (2) 4.1 Unit of measurement (2) 4.2 External structure (2) 4.3 signs (2) 5 Measurement requirements (2) 6 General technical requirements (3) 6.1 Appearance (3) 6.2 Environmental Adaptability (3) 6.3 Stability (3) 7 type evaluation item list (3) 8 Provide the number of prototypes and how to use the prototype (4) 8.1 Number of prototypes provided (4) 8.2 How to use the prototype (4) Test methods and conditions of 9 type evaluation items and data processing and qualification criteria (4) 9.1 Measurement performance test (4) 9.2 General technical requirements test (9) Judgment of 10 type evaluation results (11) 11 Measuring instruments and equipment used in the test items (11) Appendix A Differential Scanning Calorimeter Type Evaluation Original Record Format (12) Appendix B Sampling Quantity and Temperature Range of Certified Reference Materials (16)

Introduction

This type of evaluation outline is JJF 1015-2014 "General Specification for Type Evaluation of Measuring Instruments" and JJF 1016- 2014 “Guidelines for the Preparation of Types of Measuring Instruments for Evaluation of Instruments” are formulated for basic norms. The technical indicators and test methods of this type evaluation outline refer to JJG936-2012 "Differential Scanning Calorimeter". This type of evaluation outline is the first release. Differential Scanning Calorimeter Type Evaluation Outline

1 Scope

This type of evaluation outline is applicable to differential scanning calorimeters (also known as differential scanning calorimetry) with a classification code of 46021500 Type evaluation of the meter, DSC).

2 reference files

This specification refers to the following documents. JJG936-2012 Differential Scanning Calorimeter For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 Overview

A differential scanning calorimeter measures the difference in heating power or temperature difference between a sample and a reference at a programmed temperature. Instrument. According to the different measurement principle of the instrument, it can be divided into power compensation type and heat flow type. 1, Figure 2 shows. The structural principle of the power compensation type differential scanning calorimeter is that the sample and the reference material respectively have independent heaters and transmissions. Sensor. Monitored with two control systems, one of which controls the temperature so that the sample and reference are at a predetermined rate Warming or cooling; the other is used to compensate for the temperature difference between the sample and the reference. Samples and The temperature of the reference remains the same. The structural principle of the heat flow differential scanning calorimeter is that the sample and the reference are placed in the same temperature control process. In a heating system, the temperature difference between the sample holder and the bottom of the reference holder is monitored by the thermocouple at the bottom of the sample holder. Directly monitored by the temperature measuring element. The differential scanning calorimeter consists of a heating furnace, a temperature measuring element, a control system, and the like. Figure 1 Schematic diagram of power compensation DSC structure 1-sample holder; 2-reference holder; 3-thermocouple; 4-heater

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