JJG 229-2010 PDF English
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Industry Platinum and Copper Resistance Thermometers
| Valid |
| JJG 229-1998 | English | RFQ |
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6 days
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Verification Regulation of Industrial Platinum Copper Resistance Thermistor
| Obsolete |
| JJG 229-1987 | English | RFQ |
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3 days
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(Chinese Industry Standard)
| Obsolete |
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JJG 229-2010: Industry Platinum and Copper Resistance Thermometers---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JJG229-2010
JJG
NATIONAL METROLOGY VERIFICATION REGULATION
Industry Platinum and Copper Resistance
Thermometers
Issued on. SEPTEMBER 06, 2010
Implemented on. MARCH 06, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine
This Regulation was approved by the General Administration of Quality Supervision,
Inspection and Quarantine on September 06, 2010; and shall be enforced on March
06, 2011.
Administrative organization. China Temperature Measurement Technology
Committee
Chief drafting organization. Shanghai Institute of Measurement and Testing
Technology
Participating drafting organization. National Institute of Metrology, China; Zhejiang
Institute of Metrology; Fluke Corporation; JUMO Automation Dalian Co., Ltd.; and
Hangzhou Chun Jiang Instrument Co., Ltd.
This Regulation is entrusted to China Temperature Measurement Technology
Committee for interpretation.
Verification Regulation of Industry Platinum
and Copper Resistance Thermometers Replacing JJG 229-1998
Chief drafting staffs of this Regulation.
Zhu Jialiang (Shanghai Institute of Measurement and Testing Technology)
Yao Lifang (Shanghai Institute of Measurement and Testing Technology)
Participating drafting staffs.
Jin Zhijun (National Institute of Metrology, China)
Zhou Lianqin (Zhejiang Institute of Metrology)
Chen Yu (Fluke Corporation)
Tang Shaojian (JUMO Automation Dalian Co., Ltd.)
Wu Dade (Hangzhou Chun Jiang Instrument Co., Ltd.)
Table of Contents
1 Scope... 5
2 References... 5
3 Terms and Definitions... 5
4 Overview... 6
4.1 Composition... 6
4.2 Temperature characteristics... 6
5 Requirement for Metrology Performance... 8
5.1 Tolerance... 8
5.2 Stability... 8
6 General Technical Requirements... 9
6.1 Appearance... 9
6.2 Insulation resistance... 9
7 Control of Metrologic Instrument... 10
7.1 Verification conditions... 10
7.2 Verification items... 12
7.3 Verification method... 13
7.4 Processing of verification results... 21
7.5 Verification period... 22
Appendix A Allowable Range of Δα... 23
Appendix B Temperature/Resistance Relationship Table... 26
Appendix C Verification Record Format... 31
Appendix D Format of Inner Page of Verification Certificate and Verification
Result Notice... 33
Appendix E Uncertainty Evaluation of Measurement Results of Industrial
Platinum Thermal Resistance... 34
Industry Platinum and Copper Resistance
Thermometers
1 Scope
This Regulation is applicable to the initial verification, subsequent verification and in-
use inspection of industry platinum thermal resistance in the whole or part temperature
range of -200°C~+850°C and with the nominal value α of temperature coefficient of
3.851×10-3°C-1; as well as the industry copper thermal resistance (hereinafter referred
to as thermal resistance) in the whole or part temperature range of -200°C~+850°C
and with the nominal value α of temperature coefficient of 4.280×10-3°C-1.
2 References
The following references are cited in this Regulation.
IEC 60751 (2008) Industrial Platinum Resistance Thermometers and Platinum
Temperature Sensors
JB/T 8623-1997 Technical Specification and Reference Table for Industrial Copper
Thermal Resistance
When citing, pay attention to using the currently valid version of the above cited
references.
3 Terms and Definitions
3.1 Resistance thermometer
A temperature measuring instrument composed of one or more temperature-sensing
resistance elements with lead wires, protective tubes and wiring terminals.
3.2 Nominal resistance R0
The expected resistance value of the thermal resistance (or temperature sensing
element) at 0°C. The resistance values are usually. 10Ω, 50Ω, 100Ω, 500Ω, 1000Ω,
which are declared by the manufacturer and marked on the thermal resistance.
Temperature sensing element is often characterized by its nominal resistance value.
For example, a Pt100 temperature sensing element has a nominal resistance value of
100Ω; Cu50 temperature sensing element has a nominal resistance value of 50Ω.
3.4 Relative resistance WS t
The ratio of the resistance value Rt of the standard platinum resistance thermometer
at temperature t to the resistance value Rtp at the triple point of water.
3.5 Temperature coefficient of resistance
4 Overview
4.1 Composition
Industry platinum and copper thermal resistances are composed of one or more
platinum and copper thermal resistance temperature sensing elements installed in a
protective sleeve, including internal connecting wires and external terminals used to
connect electrical measuring instruments (excluding measurement and display
devices). It can contain device and junction boxes for installation and fixing, but does
not contain a detachable protective tube or installation sleeve.
4.2 Temperature characteristics
5 Requirement for Metrology Performance
5.1 Tolerance
The tolerance level corresponds to the effective temperature range. Within the effective
temperature range, the maximum deviation between the temperature t calculated by
the division table and the real temperature of the resistance value of the thermal
resistance shall not exceed the tolerance value given in Table 1.T
5.2 Stability
After the platinum thermal resistance has worked at the maximum working temperature
for 672h, the change in its R0 value shall not be greater than the absolute value of the
0°C tolerance specified in Table 1 after being converted into temperature.
6 General Technical Requirements
6.1 Appearance
6.1.1 All parts of the thermal resistance shall be assembled correctly, reliably, and
without missing parts; the outer coating shall be firm; the protective tube shall be intact;
and there shall be no dents, scratches and significant corrosion;
6.1.2 The temperature sensing element must not be broken, and there must be no
obvious bending;
6.2 Insulation resistance
The insulation resistance between the temperature sensing element and the housing,
and each temperature sensing element shall meet the following requirements.
7 Control of Metrologic Instrument
The control of Metrologic instrument includes initial verification, subsequent verification
and in-use inspection.
7.1 Verification conditions
7.2 Verification items
The verification items for the initial verification, subsequent verification and in-use
inspection are shown in Table 4.
7.3 Verification method
7.3.1 Visual inspection
According to the requirements of 6.1.1 ~ 6.1.4, check the outside of the protective
sleeve for the thermal resistance and the temperature sensing element; and there shall
be no visible damage to the naked eye. At the same time, according to the
requirements of 6.1.4, check the markings and verification mark, etc. to determine
whether the thermal resistance meets the management requirements.
7.3.4.3 Verification of R0
Measure the resistance value of the thermal resistance in a freezing point tank (or a
thermostat tank with 0°C, the deviation does not exceed ±0.2°C), and compare it with
the temperature of the freezing point tank measured by a standard measuring device,
and calculate the deviation Δt0 at 0°C.
7.4 Processing of verification results
According to the requirements of this Regulation, the qualified thermal resistance shall
be issued with a certificate of qualification of the corresponding level; if the verification
is unqualified, the notice on verification results shall be issued, indicating the
unqualified items.
7.5 Verification period
The verification period of thermal resistance can be determined according to the
conditions of use, frequency and importance, and the longest period shall not exceed
1 year.
JJG
NATIONAL METROLOGY VERIFICATION REGULATION
Industry Platinum and Copper Resistance
Thermometers
Issued on. SEPTEMBER 06, 2010
Implemented on. MARCH 06, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine
This Regulation was approved by the General Administration of Quality Supervision,
Inspection and Quarantine on September 06, 2010; and shall be enforced on March
06, 2011.
Administrative organization. China Temperature Measurement Technology
Committee
Chief drafting organization. Shanghai Institute of Measurement and Testing
Technology
Participating drafting organization. National Institute of Metrology, China; Zhejiang
Institute of Metrology; Fluke Corporation; JUMO Automation Dalian Co., Ltd.; and
Hangzhou Chun Jiang Instrument Co., Ltd.
This Regulation is entrusted to China Temperature Measurement Technology
Committee for interpretation.
Verification Regulation of Industry Platinum
and Copper Resistance Thermometers Replacing JJG 229-1998
Chief drafting staffs of this Regulation.
Zhu Jialiang (Shanghai Institute of Measurement and Testing Technology)
Yao Lifang (Shanghai Institute of Measurement and Testing Technology)
Participating drafting staffs.
Jin Zhijun (National Institute of Metrology, China)
Zhou Lianqin (Zhejiang Institute of Metrology)
Chen Yu (Fluke Corporation)
Tang Shaojian (JUMO Automation Dalian Co., Ltd.)
Wu Dade (Hangzhou Chun Jiang Instrument Co., Ltd.)
Table of Contents
1 Scope... 5
2 References... 5
3 Terms and Definitions... 5
4 Overview... 6
4.1 Composition... 6
4.2 Temperature characteristics... 6
5 Requirement for Metrology Performance... 8
5.1 Tolerance... 8
5.2 Stability... 8
6 General Technical Requirements... 9
6.1 Appearance... 9
6.2 Insulation resistance... 9
7 Control of Metrologic Instrument... 10
7.1 Verification conditions... 10
7.2 Verification items... 12
7.3 Verification method... 13
7.4 Processing of verification results... 21
7.5 Verification period... 22
Appendix A Allowable Range of Δα... 23
Appendix B Temperature/Resistance Relationship Table... 26
Appendix C Verification Record Format... 31
Appendix D Format of Inner Page of Verification Certificate and Verification
Result Notice... 33
Appendix E Uncertainty Evaluation of Measurement Results of Industrial
Platinum Thermal Resistance... 34
Industry Platinum and Copper Resistance
Thermometers
1 Scope
This Regulation is applicable to the initial verification, subsequent verification and in-
use inspection of industry platinum thermal resistance in the whole or part temperature
range of -200°C~+850°C and with the nominal value α of temperature coefficient of
3.851×10-3°C-1; as well as the industry copper thermal resistance (hereinafter referred
to as thermal resistance) in the whole or part temperature range of -200°C~+850°C
and with the nominal value α of temperature coefficient of 4.280×10-3°C-1.
2 References
The following references are cited in this Regulation.
IEC 60751 (2008) Industrial Platinum Resistance Thermometers and Platinum
Temperature Sensors
JB/T 8623-1997 Technical Specification and Reference Table for Industrial Copper
Thermal Resistance
When citing, pay attention to using the currently valid version of the above cited
references.
3 Terms and Definitions
3.1 Resistance thermometer
A temperature measuring instrument composed of one or more temperature-sensing
resistance elements with lead wires, protective tubes and wiring terminals.
3.2 Nominal resistance R0
The expected resistance value of the thermal resistance (or temperature sensing
element) at 0°C. The resistance values are usually. 10Ω, 50Ω, 100Ω, 500Ω, 1000Ω,
which are declared by the manufacturer and marked on the thermal resistance.
Temperature sensing element is often characterized by its nominal resistance value.
For example, a Pt100 temperature sensing element has a nominal resistance value of
100Ω; Cu50 temperature sensing element has a nominal resistance value of 50Ω.
3.4 Relative resistance WS t
The ratio of the resistance value Rt of the standard platinum resistance thermometer
at temperature t to the resistance value Rtp at the triple point of water.
3.5 Temperature coefficient of resistance
4 Overview
4.1 Composition
Industry platinum and copper thermal resistances are composed of one or more
platinum and copper thermal resistance temperature sensing elements installed in a
protective sleeve, including internal connecting wires and external terminals used to
connect electrical measuring instruments (excluding measurement and display
devices). It can contain device and junction boxes for installation and fixing, but does
not contain a detachable protective tube or installation sleeve.
4.2 Temperature characteristics
5 Requirement for Metrology Performance
5.1 Tolerance
The tolerance level corresponds to the effective temperature range. Within the effective
temperature range, the maximum deviation between the temperature t calculated by
the division table and the real temperature of the resistance value of the thermal
resistance shall not exceed the tolerance value given in Table 1.T
5.2 Stability
After the platinum thermal resistance has worked at the maximum working temperature
for 672h, the change in its R0 value shall not be greater than the absolute value of the
0°C tolerance specified in Table 1 after being converted into temperature.
6 General Technical Requirements
6.1 Appearance
6.1.1 All parts of the thermal resistance shall be assembled correctly, reliably, and
without missing parts; the outer coating shall be firm; the protective tube shall be intact;
and there shall be no dents, scratches and significant corrosion;
6.1.2 The temperature sensing element must not be broken, and there must be no
obvious bending;
6.2 Insulation resistance
The insulation resistance between the temperature sensing element and the housing,
and each temperature sensing element shall meet the following requirements.
7 Control of Metrologic Instrument
The control of Metrologic instrument includes initial verification, subsequent verification
and in-use inspection.
7.1 Verification conditions
7.2 Verification items
The verification items for the initial verification, subsequent verification and in-use
inspection are shown in Table 4.
7.3 Verification method
7.3.1 Visual inspection
According to the requirements of 6.1.1 ~ 6.1.4, check the outside of the protective
sleeve for the thermal resistance and the temperature sensing element; and there shall
be no visible damage to the naked eye. At the same time, according to the
requirements of 6.1.4, check the markings and verification mark, etc. to determine
whether the thermal resistance meets the management requirements.
7.3.4.3 Verification of R0
Measure the resistance value of the thermal resistance in a freezing point tank (or a
thermostat tank with 0°C, the deviation does not exceed ±0.2°C), and compare it with
the temperature of the freezing point tank measured by a standard measuring device,
and calculate the deviation Δt0 at 0°C.
7.4 Processing of verification results
According to the requirements of this Regulation, the qualified thermal resistance shall
be issued with a certificate of qualification of the corresponding level; if the verification
is unqualified, the notice on verification results shall be issued, indicating the
unqualified items.
7.5 Verification period
The verification period of thermal resistance can be determined according to the
conditions of use, frequency and importance, and the longest period shall not exceed
1 year.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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