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JJF 1170-2007

JJF 1170-2007_English: PDF (JJF1170-2007)
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JJF 1170-2007English459 Add to Cart 4 days Calibration Specification for Cryogenic Resistance Thermometers with Negative Sensitivity JJF 1170-2007 Valid JJF 1170-2007

BASIC DATA
Standard ID JJF 1170-2007 (JJF1170-2007)
Description (Translated English) Calibration Specification for Cryogenic Resistance Thermometers with Negative Sensitivity
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A54
Classification of International Standard 17.200
Word Count Estimation 19,188
Date of Issue 2007/2/28
Date of Implementation 2007-08-28
Older Standard (superseded by this standard) JJG 857-1994
Quoted Standard JJG 350-1994; JJG 858-1994
Drafting Organization ?Chinese Academy of Science, Institute of Physical and Chemical Technology
Administrative Organization National Temperature Measurement Technology Committee
Regulation (derived from) AQSIQ Announcement No. 41 of 2007
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to measuring range 1. 2K ~ 273. 16K low temperature resistance thermometer, thermistor temperature oxide glass thermometers and temperature carburization resistance thermometer. This specification does not specify what type the text of the thermometer, the following are referred thermometer.

JJF 1170-2007
Calibration Specification for Cryogenic Resistance Thermometers with Negative Sensitivity
National Metrology Technical Specification of the People's Republic
Negative temperature coefficient low temperature resistance thermometer calibration specification
Released on.2007-02-28
2007-08-28 implementation
The General Administration of Quality Supervision, Inspection and Quarantine issued
Negative temperature coefficient low temperature resistance thermometer
Calibration specification
Replace JJG857-1994
This specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on February 28,.2007, and
Implemented on August 28,.2007.
Focal Point. National Temperature Measurement Technical Committee
Drafting unit. Institute of Physics and Chemistry, Chinese Academy of Sciences
This specification is interpreted by the National Temperature Measurement Technical Committee.
The main drafters of this specification.
Lin Peng (Institute of Physical and Chemical Technology, Chinese Academy of Sciences)
Participate in the drafters.
Zhang Qinggeng (Institute of Physical and Chemical Technology, Chinese Academy of Sciences)
Yu Lihong (Institute of Physical and Chemical Technology, Chinese Academy of Sciences)
table of Contents
1 range (1)
2 Citations (1)
3 Overview (1)
4 Measurement characteristics (1)
4.1 Basic information of the thermometer (1)
4.2 Thermometer stability (2)
4.3 Measuring current and self-heating effect of thermometer (2)
5 Calibration conditions (2)
5.1 Environmental conditions (2)
5.2 Standards and other equipment (2)
6 Calibration items and calibration methods (3)
6.1 aging experiment (3)
6.2 Visual inspection (3)
6.3 Indication calibration (3)
6.4 Calibration Data Processing (5)
7 Calibration result expression (6)
8 re-study interval (7)
Appendix A Measurement Uncertainty Evaluation (8)
Appendix B Calibration Certificate Fitting Data Page Format (Recommended) (13)
Negative temperature coefficient low temperature resistance thermometer calibration specification
1 Scope
This specification applies to low temperature 锗 resistance thermometers with a measuring range of 1.2K~273.16K, low temperature oxide thermal
Resistance thermometer and low temperature carburizing glass resistance thermometer.
When the type of thermometer is not specified in the text of this specification, the following are referred to as thermometers.
2 Citations
JJG350-1994 "Standard casing platinum resistance thermometer verification procedures"
JJG858-1994 "Standard ferritic resistance thermometer verification procedures"
Use of this specification should be done with the current valid version of the above cited documents.
3 Overview
Low temperature resistance thermometer with negative temperature coefficient, including low temperature 锗 resistance thermometer, low temperature oxide thermistor temperature
Metering and low-temperature carburizing glass resistance thermometers, etc., are measured according to the characteristics of the resistance of the semiconductor as a function of temperature.
Temperature. The characteristics of these thermometers are that the resistance changes negatively with temperature, the sensitivity is high, and the temperature range is narrow.
First, the interchangeability is not good, and a single multi-point calibration is required.
Low temperature 锗 resistance thermometer, low temperature carburizing glass resistance thermometer and low temperature oxide thermistor thermometer, generally
They are made into four leads, which are positive and negative current, positive and negative voltage leads, and are packaged in metal shell casing for heat transfer enhancement.
If the casing is filled with a small amount of helium gas to reduce the effect of the self-heating effect of the thermometer.
Low-temperature oxide thermistor thermometer, also available in two-lead, glass-encapsulated, four-lead method for calibration
resistance.
These thermometer calibration data are usually fitted with a Chebyshev polynomial for least squares fitting, and its resistance-temperatur