JJG 936-2012 English PDF

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JJG 936-2012: Verification regulation of the Differential Scanning Calorimeters
Status: Valid

JJG 936: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 936-2012	439	Add to Cart	4 days	Verification regulation of the Differential Scanning Calorimeters	Valid
JJG 936-1998	399	Add to Cart	3 days	Verification Regulation of the Differential Scanning Calorimeter	Obsolete

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Basic data

Standard ID: JJG 936-2012 (JJG936-2012)
Description (Translated English): Verification regulation of the Differential Scanning Calorimeters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A54
Classification of International Standard: 17.200
Word Count Estimation: 19,197
Older Standard (superseded by this standard): JJG 936-1998
Regulation (derived from): AQSIQ Announcement No. 212 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to temperatures ranging from room temperature to 700��C in a differential scanning calorimeter (also known as differential scanning calorimeter, referred to as DSC) of the initial verification, testing and use of follow-up checks.

JJG 936-2012: Verification regulation of the 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.
Verification regulation of the Differential Scanning Calorimeters State verification procedures People's Republic of China A differential scanning calorimeter Issued on. 2012-12-21 2013-06-21 implementation The State Administration of Quality Supervision, Inspection and Quarantine released A differential scanning calorimeter test procedures Calorimeters Replacing JJG 936-1998 Focal point. the National Technical Committee stoichiometric physical Drafting units. China Institute of Metrology This procedure commissioned the National Technical Committee of the stoichiometric physics responsible for the interpretation The drafters of the regulations. Li Jia (China Institute of Metrology) Wang Haifeng (China Institute of Metrology) Sun Guohua (China Institute of Metrology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 terminology and units of measurement (1) 2.1 Baseline Wander (1) 2.2 Baseline Noise (1) 2.3 extrapolated onset temperature (1) 2.4 Resolution (1) 3 Overview (1) 4 metering performance requirements (2) 5 General Requirements (2) 5.1 Visual inspection (2) 5.2 Other (2) 6 Control of measuring instruments (2) 6.1 Verification condition (2) 6.2 Verification Project (3) 6.3 Verification Methods (3) Processing 6.4 Verification Results (6) 6.5 test cycle (6) Appendix A conventional instrument calibration methods (7) Appendix B has a heated sample size and scope of certified reference material (8) Appendix C shows a differential scanning calorimeter test the original record format (9) Appendix D calibration certificate/test results in the notice page format pattern (11) Appendix E calibration certificate/test results test results page notice pattern (12)

Introduction

Compared with JJG 936-1998, in addition to editorial changes, the major technical changes are as follows. --- Increased introduction; --- Increasing the terminology and units of measurement content (see Chapter 2); --- Test project "baseline drift" and "baseline noise" into the initial verification by subsequent test (see 6.2 Table 3); --- Abolition of the "temperature programmed repeatability" of test items; --- Revised test project "Program heating rate bias" "repeatability heat" and "heat indication error" in Measurement performance requirements (see Chapter 3, Table 1); --- Canceled the test project "repetitive heating and cooling cycles", accredited by the project "temperature repeatability" instead (see Chapter 3, Table 1); --- Added "General Instrument Calibration" Appendix (see Appendix A); --- Added "sampling of certified reference materials and a range of warming" content, and placed in the appendix (see Annex Record B); --- Revised the "differential scanning calorimeter test original record format" appendix (Appendix C); A differential scanning calorimeter test procedures

1 Scope

The order applies to a temperature range from room temperature to a differential scanning calorimeter 700 ℃ (also known as differential scanning calorimeter, Referred to DSC) initial verification, use and subsequent verification check.

2 terminology and units of measurement

The following terms apply to this procedure. 2.1 baseline drift baselinedrift In the heating process, the instrument itself is caused by the move up or down within a certain temperature range at baseline, unit Milliwatts (mW). 2.2 baseline noise baselinenoise In the heating process, the instantaneous random fluctuation from the baseline to the instrument itself caused by the fluctuation of the peak noise is The size, in milliwatts (mW). 2.3 extrapolated onset temperature extrapolatedonsettemperature Starting at the maximum slope side made tangent intersection baseline measurement curve peak, the point corresponding to the temperature in Degrees (℃). 2.4 Resolution resolution Under certain conditions, the ability to distinguish by two instruments more closely to the thermal effect.

3 Overview

A differential scanning calorimeter is under program control temperature, heating power measurement sample and reference material or the difference between the temperature difference Instruments. Depending on the instrument measuring principle can be divided into power compensation differential scanning calorimeter (Figure 1) And heat-type differential scanning calorimeter (Figure 2). 2 DSC heat flow type structure diagram in Figure 1 power compensation DSC Schematic diagram 1- specimen holder; 2 - a reference holder; 3 - thermocouple; 4- heater ......

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