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JJG 229-2010: Industry Platinum and Copper Resistance Thermometers Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid JJG 229: Historical versions
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/JJG229-2010JJG 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 Contents1 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 Thermometers1 ScopeThis 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 ReferencesThe 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 Definitions3.1 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 resistance4 Overview4.1 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 characteristics5 Requirement for Metrology Performance5.1 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 Requirements6.1 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 InstrumentThe 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 Contents1 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 Thermometers1 ScopeThis 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 ReferencesThe 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 Definitions3.1 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 resistance4 Overview4.1 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 characteristics5 Requirement for Metrology Performance5.1 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 Requirements6.1 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 InstrumentThe 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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