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JJG 701-2008: Verification Regulation of Melting-point Measurement Instruments
Status: Valid JJG 701: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 701-2008 | English | 419 |
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Verification Regulation of Melting-point Measurement Instruments
| Valid |
JJG 701-2008
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| JJG 701-1990 | English | 399 |
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Verification Regulation of Melting-Point-Measuring Instruments with Capillary Method
| Obsolete |
JJG 701-1990
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PDF similar to JJG 701-2008
Standard similar to JJG 701-2008 JJG 714 JJG 635 JJG 695 JJG 700 JJF 701 Basic data | Standard ID | JJG 701-2008 (JJG701-2008) | | Description (Translated English) | Verification Regulation of Melting-point Measurement Instruments | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A61 | | Classification of International Standard | 17.200 | | Word Count Estimation | 18,143 | | Date of Issue | 2008-12-22 | | Date of Implementation | 2009-06-22 | | Older Standard (superseded by this standard) | JJG 701-1990; JJG 463-1996 | | Regulation (derived from) | ?AQSIQ Announcement 2008 No.143 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | | Summary | This standard applies to melting point apparatus (hereinafter referred to as the instrument) of the initial verification, follow-up test and use the test. Melting point apparatus includes a capillary melting point apparatus and thermal melting point apparatus Taiwan and France. | JJG 701-2008: Verification Regulation of Melting-point Measurement Instruments---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 Melting-point Measurement Instruments
State verification procedures People's Republic of China
Melting point detector
Posted 2008-12-22
2009-06-22 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Melting point detector test procedures
Melting-p
Replacing JJG 701-1990
JJG 463-1996
The regulations by the State Administration of Quality Supervision, Inspection and Quarantine approved on December 22, 2008, and from
From June 22, 2009 into effect.
Focal point. the National Technical Committee stoichiometric physical
Main drafting unit. Tianjin Institute of Supervision and Testing Weighing
Participated in the drafting unit. Shanghai Precision Scientific Instrument Co., Ltd.
Tianjin Tianda Tianfa Technology Co., Ltd.
This procedure commissioned the National Technical Committee of the stoichiometric physics responsible for the interpretation
The main drafters of this procedure.
Zhang Jian (Tianjin Academy of Sciences supervised detection measurement)
Weishu Long (Tianjin Supervision and Testing Institute of Metrology)
Drafters participate.
Zhuji Zhong (Shanghai Precision Scientific Instrument Co., Ltd.)
Li Chaoyang (Tianjin Tianda Tianfa Technology Co., Ltd.)
Song Wei (Tianjin University)
table of Contents
1 Scope (1)
2 Terms (1)
3 Overview (1)
4 metering performance requirements (1)
4.1 indication error (1)
4.2 Repeatability (1)
4.3 linear heating rate of error (2)
5 General Requirements (2)
5.1 Appearance (2)
5.2 Insulation Resistance (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 (5)
6.5 test cycle (6)
Appendix A melting point of the reference material and instructions for use (7)
Appendix B test certificate (in-page) format (9)
Appendix C test results notice (within the page) format (10)
Appendix D value correction liquid glass thermometers (11)
Appendix E melting point detector test recording format (12)
Melting point detector test procedures
1 Scope
The order applies to melting point apparatus (hereinafter referred to as equipment) initial verification, verification and subsequent use of the subject
Experience. Melting point apparatus including capillary melting point apparatus and method hot stage melting point apparatus.
2 Terms
2.1 capillary melting point
As measured by capillary melting point called capillary melting point. Which measures are indirect measurement, it is measured temperature
Capillary samples at ambient temperature, not the temperature of the sample.
2.2 thermal melting point
Crystalline material, obtaining a dry air heat at atmospheric pressure, a small amount of its unlimited solid same liquid
Temperature was called thermodynamic equilibrium thermodynamic melting point.
3 Overview
Capillary melting point apparatus for measuring a crystalline chemicals, pharmaceuticals capillary melting point or thermodynamic melting point.
The measuring principle of the instrument is heating the sample in the capillary transfer medium temperature observed phase transition or phase change when light transmittance
Changes in order to determine the melting point, which is mainly composed of heating, temperature control, temperature and other components, temperature and mass media may be a liquid or solid
body.
Theoretical thermal melting point is the melting point of the crystalline substance under ideal conditions, it is generally by measuring the freezing point and melting
After the mathematical point of extrapolated. Some capillary melting point apparatus also has a function of measuring the thermodynamic melting point, the melting point is marked by the
After the reference material to calibrate the instrument thermodynamic melting point measurement function, measurement of the sample obtained by capillary melting point and projections.
Hot Taiwan and France melting point detector for measuring the melting point of the crystalline chemicals, pharmaceuticals and partially crystalline polymer. instrument
The measurement principle is heating the specimen slides and cover slips between the hot plate, by means of a microscope with polarizing
Observed changes in light transmission properties of the phase transition process and automated measurements to determine the melting point of the phase transition, which is mainly composed of a hot plate, temperature measurement, control
Mild with a microscope or some other polarizing device photodetector composition.
4 metering performance requirements
Capillary melting point apparatus is divided by the maximum permissible error in the accuracy of the measurement range of 200 ℃ or less, etc.
Level, is divided into four kinds 0.2,0.5,1.0,1.5 grade; hot Taiwan and France melting point detector may be in different measurement ranges
It has a different level of accuracy, 0.5, 1.0, divided into three levels.
4.1 Indication error
Instrument indication error test results should not exceed the measurement performance requirements (Table 1) of the regulations.
4.2 Repeatability
Instrument Repeatability test results should not exceed the measurement performance requirements (Table 1) of the regulations.
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