The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

R C Kemp - One of the best experts on this subject based on the ideXlab platform.

  • the Platinum Resistance Thermometer range of the international temperature scale of 1990
    Metrologia, 1991
    Co-Authors: L Crovini, R C Kemp, H J Jung, S K Ling, W Mangum, H Sakurai
    Abstract:

    Within the International Temperature Scale of 1990 (ITS-90) the Platinum Resistance Thermometer (PRT) is used to realize the scale from approximately 13,8 K to 1 235 K. Such a temperature range is wider than the corresponding range in the International Practical Temperature Scale of 1968 (IPTS-68) because the PRT is used up to the freezing point of silver (1 234,93 K). In this way, the ITS-90 can be realized with much more precision than the IPTS-68, particularly between 901 K and 1 235 K where the standard Pt-10% Rh vs Pt thermocouple was previously used. This paper describes some important steps in the construction of the PRT reference function and the criteria for the selection of the PRT interpolating equations of the ITS-90. In contrast to previous international scales, the PRT range of the ITS-90 is based on two reference functions, one from 13,8 K to 273,16 K and the other from 273,15 K to 1 234,93 K. The two reference functions were obtained from two real PRTs. A set of interpolating equations is used to account for the differences of other real PRTs from those on which the reference functions are based. They provide flexibility of calibration and high precision as expressed, for instance, by non-uniqueness and sub-range inconsistency not exceeding 0,5 mK over the range from 13,8 K to 693 K. Such good properties are the consequence of the choice of suitable forms for the interpolating equations and of fine adjustments in the values assigned to some defining fixed points.

  • the reference function for Platinum Resistance Thermometer interpolation between 13 8033 k and 273 16 k in the international temperature scale of 1990
    Metrologia, 1991
    Co-Authors: R C Kemp
    Abstract:

    The historical path followed in the development of the reference function for interpolating temperatures from Platinum Resistance Thermometers between 13,8033 K and 273,16 K in the International Temperature Scale of 1990 is described. The construction of the reference function is discussed, as are the considerations which lead to the form adopted for the ITS-90.

Gordon C Cucullu - One of the best experts on this subject based on the ideXlab platform.

  • Qualification Testing of Engineering Camera and Platinum Resistance Thermometer (PRT) Sensors for Mars Science Laboratory (MSL) Project under Extreme Temperatures to Assess Reliability and to Enhance Mission Assurance
    2015
    Co-Authors: Rajeshuni Ramesham, J. N. Maki, Gordon C Cucullu
    Abstract:

    Package Qualification and Verification (PQV) of advanced electronic packaging and interconnect technologies and various other types of qualification hardware for the Mars Exploration Rover/Mars Science Laboratory flight projects has been performed to enhance the mission assurance. The qualification of hardware (Engineering Camera and Platinum Resistance Thermometer, PRT) under extreme cold temperatures has been performed with reference to various project requirements. The flight-like packages, sensors, and subassemblies have been selected for the study to survive three times (3x) the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations and mission phases. Qualification has been performed by subjecting above flight-like qual hardware to the environmental temperature extremes and assessing any structural failures or degradation in electrical performance due to either overstress or thermal cycle fatigue. Experiments of flight like hardware qualification test results have been described in this paper. Key words: Engineering camera, Platinum Resistance Thermometer, hardware qualification

  • qualification testing of engineering camera and Platinum Resistance Thermometer prt sensors for msl project under extreme temperatures to assess reliability and to enhance mission assurance
    Journal of microelectronics and electronic packaging, 2009
    Co-Authors: Rajeshuni Ramesham, J. N. Maki, Gordon C Cucullu
    Abstract:

    Package qualification and verification (PQV) of advanced electronic packaging and interconnect technologies and various other types of qualification hardware for the Mars Exploration Rover/Mars Science Laboratory flight projects has been performed to enhance the mission assurance. The qualification of hardware (engineering camera and Platinum Resistance Thermometer, PRT) under extreme cold temperatures has been performed with reference to various project requirements. The flight-like packages, sensors, and subassemblies have been selected for the study to survive three times (3×) the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations, and mission phases. Qualification has been performed by subjecting above flight-like qual hardware to the environmental temperature extremes and assessing any structural failures or degradation in electrical performance du...

  • qualification testing of engineering camera and Platinum Resistance Thermometer prt sensors for mars science laboratory msl project under extreme temperatures to assess reliability and to enhance mission assurance
    Proceedings of SPIE the International Society for Optical Engineering, 2008
    Co-Authors: Rajeshuni Ramesham, J. N. Maki, Gordon C Cucullu
    Abstract:

    Package Qualification and Verification (PQV) of advanced electronic packaging and interconnect technologies and various other types of qualification hardware for the Mars Exploration Rover/Mars Science Laboratory flight projects has been performed to enhance the mission assurance. The qualification of hardware (Engineering Camera and Platinum Resistance Thermometer, PRT) under extreme cold temperatures has been performed with reference to various project requirements. The flight- like packages, sensors, and subassemblies have been selected for the study to survive three times (3×) the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations and mission phases. Qualification has been performed by subjecting above flight-like qual hardware to the environmental temperature extremes and assessing any structural failures or degradation in electrical performance due to either overstress or thermal cycle fatigue. Experiments of flight like hardware qualification test results have been described in this paper.

M. Arai - One of the best experts on this subject based on the ideXlab platform.

  • Preliminary measurements of the precise comparison between a radiation Thermometer and a Platinum Resistance Thermometer
    2009
    Co-Authors: Kazumasa Yamazawa, K. Anso, J. V. Widiatmo, M. Arai
    Abstract:

    This paper describes the preliminary measurements of the precise comparison between a radiation Thermometer and a Platinum Resistance Thermometer (PRT). The aim of this work is to measure the Resistance - temperature relation of standard Platinum Resistance Thermometers at temperatures above the present upper limit (961.78 °C) of PRTs. The comparison furnace is placed in horizontal orientation, and a graphite block is placed in the center as a comparison block. In this paper, preliminary measurement results for the evaluation of the uncertainty in the comparison measurement are reported. First, the results of the comparison using the design configuration determined in our previous paper are reported. Upon the measurements of three independent experimental rounds, we suspected that the design of the comparison block needed some improvements. We re-designed the comparison block, and also report the comparison results obtained using this improved version.

  • Evaluation of a horizontal furnace for precise comparison between a radiation Thermometer and a Platinum Resistance Thermometer
    SICE Annual Conference 2007, 2007
    Co-Authors: Kazumasa Yamazawa, K. Anso, M. Arai
    Abstract:

    This paper reports the recent development of a horizontal comparison furnace aimed for the comparison measurement between a standard radiation Thermometer and a Platinum Resistance Thermometer. The furnace is placed in horizontal orientation, and a graphite block is placed in the center as a comparison block. One end of the comparison block is the blackbody for the radiation Thermometer, while from the other end a Platinum Resistance Thermometer is inserted to measure the temperature of the block. The furnace temperature is controlled with a precise temperature control system yielding a temperature stability of plusmn2 mK at 800degC during a 24 hour period. Measurement results aimed for the evaluation of some of the uncertainty components in the comparison measurement using this furnace is reported in this paper.

  • High-temperature furnace controlled by a Platinum Resistance Thermometer
    SICE 2004 Annual Conference, 2004
    Co-Authors: M. Arai, K Yamazawa
    Abstract:

    High-temperature Platinum Resistance Thermometers (HTPRTs) developed in the previous work were applied as temperature control sensor of a high-temperature furnace. A furnace equipped with this HTPRT and digital control system was constructed. The temperature stability of the furnace was found to be better than 1 mK in the temperature range from 920 /spl deg/C to 1000 /spl deg/C. A resolution of 1 mK can be achieved for temperature setting with stability of a few tenth of a mK at that temperature range, which is ten times better than the conventional furnace control by applying thermocouples.

  • prototype of a high temperature standard Platinum Resistance Thermometer utilizing alumina disk insulators
    Society of Instrument and Control Engineers of Japan, 2004
    Co-Authors: K Yamazawa, M. Arai
    Abstract:

    In the paper, evaluation of an improved design prototype for high temperature standard Platinum Resistance Thermometers (HTSPRTs) is reported. The prototype utilizes alumina disk insulators to minimize the leakage current flowing between the measurement leads at the stem part of the HTSPRT. The HTSPRT is designed to be applicable up to the copper freezing point.

  • properties of a high temperature Platinum Resistance Thermometer up to 1350 c
    TEMPERATURE: Its Measurement and Control in Science and Industry; Volume VII; Eighth Temperature Symposium, 2003
    Co-Authors: M. Arai, A Kawata
    Abstract:

    Properties of high‐temperature Platinum Resistance Thermometers developed at NMIJ are studied in the range from 1100 °C to 1350 °C. The HTPRTs have shown drift rates of 0.1 mK/h at 1100 °C and 0.5 mK/h at 1170 °C. The W(29.7646 °C) values of the HTPRTs increased after exposure at 1100 °C, while they slightly decreased at 1150 °C and 1170 °C. After exposed at 1170 °C for 500 hours, three of six HTPRTs showed W(29.7646 °C) values larger than 1.118 07. It was also found that the decrease in Resistance continued above 1200 °C up to 1350 °C.

H Sakurai - One of the best experts on this subject based on the ideXlab platform.

  • the Platinum Resistance Thermometer range of the international temperature scale of 1990
    Metrologia, 1991
    Co-Authors: L Crovini, R C Kemp, H J Jung, S K Ling, W Mangum, H Sakurai
    Abstract:

    Within the International Temperature Scale of 1990 (ITS-90) the Platinum Resistance Thermometer (PRT) is used to realize the scale from approximately 13,8 K to 1 235 K. Such a temperature range is wider than the corresponding range in the International Practical Temperature Scale of 1968 (IPTS-68) because the PRT is used up to the freezing point of silver (1 234,93 K). In this way, the ITS-90 can be realized with much more precision than the IPTS-68, particularly between 901 K and 1 235 K where the standard Pt-10% Rh vs Pt thermocouple was previously used. This paper describes some important steps in the construction of the PRT reference function and the criteria for the selection of the PRT interpolating equations of the ITS-90. In contrast to previous international scales, the PRT range of the ITS-90 is based on two reference functions, one from 13,8 K to 273,16 K and the other from 273,15 K to 1 234,93 K. The two reference functions were obtained from two real PRTs. A set of interpolating equations is used to account for the differences of other real PRTs from those on which the reference functions are based. They provide flexibility of calibration and high precision as expressed, for instance, by non-uniqueness and sub-range inconsistency not exceeding 0,5 mK over the range from 13,8 K to 693 K. Such good properties are the consequence of the choice of suitable forms for the interpolating equations and of fine adjustments in the values assigned to some defining fixed points.

Rajeshuni Ramesham - One of the best experts on this subject based on the ideXlab platform.

  • Qualification Testing of Engineering Camera and Platinum Resistance Thermometer (PRT) Sensors for Mars Science Laboratory (MSL) Project under Extreme Temperatures to Assess Reliability and to Enhance Mission Assurance
    2015
    Co-Authors: Rajeshuni Ramesham, J. N. Maki, Gordon C Cucullu
    Abstract:

    Package Qualification and Verification (PQV) of advanced electronic packaging and interconnect technologies and various other types of qualification hardware for the Mars Exploration Rover/Mars Science Laboratory flight projects has been performed to enhance the mission assurance. The qualification of hardware (Engineering Camera and Platinum Resistance Thermometer, PRT) under extreme cold temperatures has been performed with reference to various project requirements. The flight-like packages, sensors, and subassemblies have been selected for the study to survive three times (3x) the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations and mission phases. Qualification has been performed by subjecting above flight-like qual hardware to the environmental temperature extremes and assessing any structural failures or degradation in electrical performance due to either overstress or thermal cycle fatigue. Experiments of flight like hardware qualification test results have been described in this paper. Key words: Engineering camera, Platinum Resistance Thermometer, hardware qualification

  • qualification testing of engineering camera and Platinum Resistance Thermometer prt sensors for msl project under extreme temperatures to assess reliability and to enhance mission assurance
    Journal of microelectronics and electronic packaging, 2009
    Co-Authors: Rajeshuni Ramesham, J. N. Maki, Gordon C Cucullu
    Abstract:

    Package qualification and verification (PQV) of advanced electronic packaging and interconnect technologies and various other types of qualification hardware for the Mars Exploration Rover/Mars Science Laboratory flight projects has been performed to enhance the mission assurance. The qualification of hardware (engineering camera and Platinum Resistance Thermometer, PRT) under extreme cold temperatures has been performed with reference to various project requirements. The flight-like packages, sensors, and subassemblies have been selected for the study to survive three times (3×) the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations, and mission phases. Qualification has been performed by subjecting above flight-like qual hardware to the environmental temperature extremes and assessing any structural failures or degradation in electrical performance du...

  • qualification testing of engineering camera and Platinum Resistance Thermometer prt sensors for mars science laboratory msl project under extreme temperatures to assess reliability and to enhance mission assurance
    Proceedings of SPIE the International Society for Optical Engineering, 2008
    Co-Authors: Rajeshuni Ramesham, J. N. Maki, Gordon C Cucullu
    Abstract:

    Package Qualification and Verification (PQV) of advanced electronic packaging and interconnect technologies and various other types of qualification hardware for the Mars Exploration Rover/Mars Science Laboratory flight projects has been performed to enhance the mission assurance. The qualification of hardware (Engineering Camera and Platinum Resistance Thermometer, PRT) under extreme cold temperatures has been performed with reference to various project requirements. The flight- like packages, sensors, and subassemblies have been selected for the study to survive three times (3×) the total number of expected temperature cycles resulting from all environmental and operational exposures occurring over the life of the flight hardware including all relevant manufacturing, ground operations and mission phases. Qualification has been performed by subjecting above flight-like qual hardware to the environmental temperature extremes and assessing any structural failures or degradation in electrical performance due to either overstress or thermal cycle fatigue. Experiments of flight like hardware qualification test results have been described in this paper.