Electrical Techniques for Compensation of Thermal Time Lag of Thermocouples and Resistance Thermometer Elements PDF Download
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Author: Charles E. Shepard
Publisher:
ISBN:
Category : Amplifiers (Electronics)
Languages : en
Pages : 740
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Book Description
Basic electrical networks are described that compensate for the thermal time lag of thermocouple and resistance thermometer elements. For a given set of operating conditions, networks requiring no amplifiers can provide a thirtyfold reduction in effective time lag. This improvement is obtained without attenuation of the voltage signal, but does result in a large reduction in the amount of electric power available because of an increase in the output impedance of the network. Networks used commercially available amplifiers can provide a thousandfold reduction in the effective time lag without attenuation of the alternating voltage signal or or the available electric power, but the improvement is often obtained at the expense of loss of the zero-frequency signal. The completeness of compensation is limited by the extent of off-design operation required.
Author: Charles E. Shepard
Publisher:
ISBN:
Category : Amplifiers (Electronics)
Languages : en
Pages : 740
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Book Description
Basic electrical networks are described that compensate for the thermal time lag of thermocouple and resistance thermometer elements. For a given set of operating conditions, networks requiring no amplifiers can provide a thirtyfold reduction in effective time lag. This improvement is obtained without attenuation of the voltage signal, but does result in a large reduction in the amount of electric power available because of an increase in the output impedance of the network. Networks used commercially available amplifiers can provide a thousandfold reduction in the effective time lag without attenuation of the alternating voltage signal or or the available electric power, but the improvement is often obtained at the expense of loss of the zero-frequency signal. The completeness of compensation is limited by the extent of off-design operation required.
Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 16
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 500
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Author: United States. National Advisory Committee for Aeronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 276
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 750
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Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 122
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Author: Ernest Franklin Fiock
Publisher:
ISBN:
Category : Gas-turbines
Languages : en
Pages : 120
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Book Description
Author: D.F.G. Durão
Publisher: Springer Science & Business Media
ISBN: 9400922418
Category : Science
Languages : en
Pages : 398
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Book Description
Much has been said and written about the abilities of modern instrumentation to help solve problems of combustion in engines. In the main, however, the design and fabr ication of combustion chambers continues to be based on extrapolation of exper ience gained from use and rig tests, with little input from advanced techniques such as those based on optical diagnotics. At the same time, it has become increasingly difficult to design better combustion chambers without knowledge of the relevant flow processes. Thus, the future must involve improved understanding which, in turn, will require detailed measurements of velocity, temperature and concentration. The need to narrow the gap between current industrial practice and the acquisition and implementation of improved techniques motivated the organization of the Advanced Study Institute upon which this volume is based. This Institute on Instrumentation for Combustion and Flow in Engines was arranged to display the needs of industry and the possibilities made available by modern instrumentation and, at the same time, to make clear the relative advantages of optical and probe techniques. Held at Vimeiro during the period from 13 to 26 September, 1987, the Institute was attended by 120 participants and 16 invited lecturers.
Author: Ephraim M. Sparrow
Publisher:
ISBN:
Category : Equations
Languages : en
Pages : 744
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Book Description
All the aforementioned results are given for fluids having Prandtl numbers in the range 0.01 to 1000.
