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JJF 1187-2008: Calibration Specification for Thermal Imagers Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
JJF 1187-2008: Calibration Specification for Thermal Imagers---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/JJF1187-2008NATIONAL METROLOGICAL TECHNICAL SPECIFICATIONS Calibration Specification for Thermal Imagers Issued on. JANUARY 31, 2008 Implemented on. APRIL 30, 2008 Issued by. General Administration of Quality Supervision, Inspection and Quarantine This Specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on January 31, 2008; and should come into effect on April 30, 2008. Administrative organization. China Temperature Measurement Technology Committee Chief drafting organization. National Institute of Metrology, China Participating drafting organization. Guangzhou Sat Electric Infrared Technology Co., Ltd. This Specification shall be interpreted by China Temperature Measurement Technology Committee Calibration Specification for Thermal Imagers Chief drafting staffs of this Specification. Bai Chengyu (National Institute of Metrology, China) Xing Bo (National Institute of Metrology, China) Yuan Zundong (National Institute of Metrology, China) Participating drafting staffs. Wu Yigang (Guangzhou Sat Electric Infrared Technology Co., Ltd.) Table of Contents1 Scope... 5 2 Normative References... 5 3 Terms and Metrological Unit... 5 3.1 Terms... 5 3.2 Metrological unit... 5 4 Overview... 6 5 Metrological Characteristics... 6 5.1 Appearance... 6 5.2 Display... 6 5.3 Error of Indication... 6 5.4 Temperature measurement consistency... 7 6 Calibration Conditions... 7 6.1 Environmental conditions... 7 6.2 Standards and other equipment... 7 7 Calibration Items and Methods... 8 7.1 Calibration items... 8 7.2 Calibration methods... 8 8 Expression of Calibration Results... 12 9 Recalibration Time-Interval... 13 Appendix A Evaluation on the Uncertainty of Indication Error Calibration of Thermal Imager... 14 Appendix B Recording Format of Calibration Results... 18 Appendix C Data Page Format of Thermal Imager Calibration Certificate... 20 Calibration Specification for Thermal Imagers1 ScopeThis Specification is applicable to the calibration of thermal imagers with temperature measurement function in the range of -20°C ~ 2000°C.2 Normative ReferencesThis Specification quoted the following references. JJF 1001-1998 General Terms in Metrology and Their Definitions JJG 1007-2007 Temperature Metrological Terms and Their Definitions GB/T 19870-2005 Industrial Inspecting Thermal Imagers JJF 1059-1999 Evaluation and Expression of Uncertainty in Measurement When using this Specification, pay attention to adopting the current effective editions of the above normative references.3 Terms and Metrological Unit3.1 Terms 3.1.1 The terms and definitions given in GB/T 19870-2005 Industrial Inspecting Thermal Imagers are applicable to this Specification. 3.1.2 Error of indication The error of indication for the thermal imager refers to the difference between the temperature indication of the thermal imager and the agreed true value of the measured blackbody radiation source temperature. 3.2 Metrological unit The temperature unit is Celsius (°C) or Kelvin (K).4 OverviewThe thermal imager can convert the thermal radiation on the surface of the object into a visible image; and correct through emissivity, reflectance and transmittance and accurately measure the surface temperature and surface temperature distribution of the object.5 Metrological Characteristics5.1 Appearance 5.2 Display The display of the thermal imager shall be free of defects that affect calibration. 5.3 Error of Indication The error of indication for temperature of the thermal imager is determined under calibration laboratory conditions. 5.4 Temperature measurement consistency The consistency of the temperature measurement results in different areas of the thermal imager's field of view is the ability of the thermal imager to accurately reflect the surface temperature distribution of the measured object.6 Calibration Conditions6.1 Environmental conditions 6.1.1 The ambient temperature of the calibration laboratory shall be (23±5) °C, while the humidity shall not be greater than 85% RH (no condensation). 6.2 Standards and other equipment 6.2.1 Standard instrument Generally, a platinum resistance thermometer, a thermocouple (with corresponding electrical measuring equipment) or a radiation thermometer is used as a standard instrument to measure the temperature of the blackbody radiation source.7 Calibration Items and Methods7.1 Calibration items 7.1.1 Appearance The thermal imager's housing, mechanical adjustment parts, exposed optical components, keys, electrical connections, etc. shall not have defects that affect the measurement function of the thermal imager. 7.1.4 Temperature measurement consistency The thermal imager shall be tested for temperature measurement consistency under laboratory environmental temperature and humidity conditions. 7.2 Calibration methods 7.2.1 Appearance Take manual and visual inspection, the appearance of the calibrated thermal imager must meet the requirements of 7.1.1. 7.2.2 Display Take manual and visual inspection, the display device of the calibrated thermal imager must meet the requirements of 7.1.2. 7.2.3 Error of indication 7.2.3.1 Selection of calibration temperature point. The selection of the calibration temperature point is the upper and lower limits of the range and the middle value of the range. 7.2.3.4 Determine the measurement distance according to the requirements of the user or the focusing range of the thermal imager, the optical resolution and the target diameter of the blackbody radiation source. Adjust the position of the thermal imager, make the thermal imager aim at the target center of the blackbody radiation source in the axial direction of the blackbody radiation source, and make the measured object clearly imaged. 7.2.3.9 Calculate the average radiation temperature, tBBi, of the blackbody radiation source. 7.2.4 Temperature measurement consistency 7.2.4.1 Set the temperature of the blackbody radiation source according to the actual use of the thermal imager or according to user requirements, usually it is 100°C. 7.2.4.2 Clean the exposed optical components of the thermal imager according to the requirements of the instruction manual of it. 7.2.4.3 Install additional optical lens or attenuator according to user requirements. 7.2.4.7 Before performing calibration for temperature measurement consistency, other operations that have an impact on the measurement results required by the instruction manual of the thermal imager, such as clearing (if required by the calibrated thermal imager) shall be completed. 7.2.4.10 Calculate the value, φi, of temperature measurement consistency of the calibrated thermal imager.8 Expression of Calibration ResultsThe calibration results shall be reflected on the calibration certificate or calibration report.9 Recalibration Time-IntervalThe time interval for recalibration is determined by the user according to the use situation, and it is recommended to be 1 year. It shall be shortened appropriately when it is used frequently. JJF 1187-2008 NATIONAL METROLOGICAL TECHNICAL SPECIFICATIONS Calibration Specification for Thermal Imagers Issued on. JANUARY 31, 2008 Implemented on. APRIL 30, 2008 Issued by. General Administration of Quality Supervision, Inspection and Quarantine This Specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on January 31, 2008; and should come into effect on April 30, 2008. Administrative organization. China Temperature Measurement Technology Committee Chief drafting organization. National Institute of Metrology, China Participating drafting organization. Guangzhou Sat Electric Infrared Technology Co., Ltd. This Specification shall be interpreted by China Temperature Measurement Technology Committee Calibration Specification for Thermal Imagers Chief drafting staffs of this Specification. Bai Chengyu (National Institute of Metrology, China) Xing Bo (National Institute of Metrology, China) Yuan Zundong (National Institute of Metrology, China) Participating drafting staffs. Wu Yigang (Guangzhou Sat Electric Infrared Technology Co., Ltd.)Table of Contents1 Scope... 5 2 Normative References... 5 3 Terms and Metrological Unit... 5 3.1 Terms... 5 3.2 Metrological unit... 5 4 Overview... 6 5 Metrological Characteristics... 6 5.1 Appearance... 6 5.2 Display... 6 5.3 Error of Indication... 6 5.4 Temperature measurement consistency... 7 6 Calibration Conditions... 7 6.1 Environmental conditions... 7 6.2 Standards and other equipment... 7 7 Calibration Items and Methods... 8 7.1 Calibration items... 8 7.2 Calibration methods... 8 8 Expression of Calibration Results... 12 9 Recalibration Time-Interval... 13 Appendix A Evaluation on the Uncertainty of Indication Error Calibration of Thermal Imager... 14 Appendix B Recording Format of Calibration Results... 18 Appendix C Data Page Format of Thermal Imager Calibration Certificate... 20 Calibration Specification for Thermal Imagers1 ScopeThis Specification is applicable to the calibration of thermal imagers with temperature measurement function in the range of -20°C ~ 2000°C.2 Normative ReferencesThis Specification quoted the following references. JJF 1001-1998 General Terms in Metrology and Their Definitions JJG 1007-2007 Temperature Metrological Terms and Their Definitions GB/T 19870-2005 Industrial Inspecting Thermal Imagers JJF 1059-1999 Evaluation and Expression of Uncertainty in Measurement When using this Specification, pay attention to adopting the current effective editions of the above normative references.3 Terms and Metrological Unit3.1 Terms 3.1.1 The terms and definitions given in GB/T 19870-2005 Industrial Inspecting Thermal Imagers are applicable to this Specification. 3.1.2 Error of indication The error of indication for the thermal imager refers to the difference between the temperature indication of the thermal imager and the agreed true value of the measured blackbody radiation source temperature. 3.2 Metrological unit The temperature unit is Celsius (°C) or Kelvin (K).4 OverviewThe thermal imager can convert the thermal radiation on the surface of the object into a visible image; and correct through emissivity, reflectance and transmittance and accurately measure the surface temperature and surface temperature distribution of the object.5 Metrological Characteristics5.1 Appearance 5.2 Display The display of the thermal imager shall be free of defects that affect calibration. 5.3 Error of Indication The error of indication for temperature of the thermal imager is determined under calibration laboratory conditions. 5.4 Temperature measurement consistency The consistency of the temperature measurement results in different areas of the thermal imager's field of view is the ability of the thermal imager to accurately reflect the surface temperature distribution of the measured object.6 Calibration Conditions6.1 Environmental conditions 6.1.1 The ambient temperature of the calibration laboratory shall be (23±5) °C, while the humidity shall not be greater than 85% RH (no condensation). 6.2 Standards and other equipment 6.2.1 Standard instrument Generally, a platinum resistance thermometer, a thermocouple (with corresponding electrical measuring equipment) or a radiation thermometer is used as a standard instrument to measure the temperature of the blackbody radiation source.7 Calibration Items and Methods7.1 Calibration items 7.1.1 Appearance The thermal imager's housing, mechanical adjustment parts, exposed optical components, keys, electrical connections, etc. shall not have defects that affect the measurement function of the thermal imager. 7.1.4 Temperature measurement consistency The thermal imager shall be tested for temperature measurement consistency under laboratory environmental temperature and humidity conditions. 7.2 Calibration methods 7.2.1 Appearance Take manual and visual inspection, the appearance of the calibrated thermal imager must meet the requirements of 7.1.1. 7.2.2 Display Take manual and visual inspection, the display device of the calibrated thermal imager must meet the requirements of 7.1.2. 7.2.3 Error of indication 7.2.3.1 Selection of calibration temperature point. The selection of the calibration temperature point is the upper and lower limits of the range and the middle value of the range. 7.2.3.4 Determine the measurement distance according to the requirements of the user or the focusing range of the thermal imager, the optical resolution and the target diameter of the blackbody radiation source. Adjust the position of the thermal imager, make the thermal imager aim at the target center of the blackbody radiation source in the axial direction of the blackbody radiation source, and make the measured object clearly imaged. 7.2.3.9 Calculate the average radiation temperature, tBBi, of the blackbody radiation source. 7.2.4 Temperature measurement consistency 7.2.4.1 Set the temperature of the blackbody radiation source according to the actual use of the thermal imager or according to user requirements, usually it is 100°C. 7.2.4.2 Clean the exposed optical components of the thermal imager according to the requirements of the instruction manual of it. 7.2.4.3 Install additional optical lens or attenuator according to user requirements. 7.2.4.7 Before performing calibration for temperature measurement consistency, other operations that have an impact on the measurement results required by the instruction manual of the thermal imager, such as clearing (if required by the calibrated thermal imager) shall be completed. 7.2.4.10 Calculate the value, φi, of temperature measurement consistency of the calibrated thermal imager.8 Expression of Calibration ResultsThe calibration results shall be reflected on the calibration certificate or calibration report.9 Recalibration Time-IntervalThe time interval for recalibration is determined by the user according to the use situation, and it is recommended to be 1 year. It shall be shortened appropriately when it is used frequently. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of JJF 1187-2008 be delivered?Answer: The full copy PDF of English version of JJF 1187-2008 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of JJF 1187-2008_English with my colleagues?Answer: Yes. The purchased PDF of JJF 1187-2008_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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