[en] The measurement of a temperature (whatever the type of transducer used) raises three problems: the choice of transducer; where it should be placed; how it should be fixed and protected. These are the three main points examined, after a brief description of the most commonly used thermocouples

No abstract available

[en] This experiment is a kind of nonfunction fibre-optic temperature sensor. It utilizes high-sensitive bimetallic strip for element of measuring temperature. The changing of bimetallic strip alterates intensity of light through fibre-optic. This equipment is simple in structure, subtle in design, extensive in application, and so on. (author). 4 refs, 6 figs, 1 tab

[en] A description is given of the plan for assembly, instrumentation, emplacement, and operational checkout of the soil temperature test assembly and dry well liner. The activities described cover all operations necessary to accomplish the receiving inspection, instrumentation and pre-construction handling of the dry well liner, plus all operations performed with the test article. Actual details of construction work are not covered by this procedure. Each part and/or section of this procedure is a separate function to be accomplished as required by the nature of the operation. The organization of the procedure is not intended to imply a special operational sequence or schedular requirement. Specific procedure operational sections include: receiving inspection; liner assembly operations; construction operations (by others); prepare shield plug; test article assembly and installation; and operational checkout

[en] Surface temperature of a rotating flywheel is measured remotely by inducing fluorescence from a pulsed nitrogen laser in lanthanum oxysulfide adhered to the surface. 4 references, 11 figures

[en] In order to reduce the temperature measurement error with the uncooled infrared thermal imager, experiments were conducted to evaluate the effects of environment temperature and measurement distance on the measurement error of human eye temperature. First, the forehead temperature was used as an intermediate variable to obtain the actual temperature of human eyes. Then, the effects of environment temperature and measurement distance on the temperature measurement were separately analyzed. Finally, an empirical model was established to correlate actual eye temperature with the measured temperature, environment temperature, and measurement distance. To verify the formula, three different environment temperatures were tested at different distances. The measurement errors were substantially reduced using the empirical model for temperature correction. The results show that this method can effectively improve the accuracy of temperature measurement using the infrared thermal imager. (paper)

[en] the ambiguity of the concept of flow temperature is shown, the conventional definition of mixture temperature to be attained from the indication of a probe is thus obtained. The discrepancie between the probe temperature and mean temperature may be due either to the flow itself (temperature gradients in the flow) or to the flow perturbation by the probe. The conduction effects of the probe holder, thermal radiation and probe heating in high velocity flow are successively examined. The problem of the response time determination is then examined by showing the importance of the existing transient hydrodynamic effects. Some fundamental books on temperature measurement are indicated in the bibliography

[en] The potential errors in temperature measurements employing small diameter (0.5 mm) metal sheathed thermocouples were analyzed for the Core Flow Test Loop experiments at ORNL. The sources of error considered were extension lead wires, reference junctions, the data acquisition system, calibration and decalibration of the sensors, thermal shunting, electrical shunting, electrical leakage, and electrical noise

No abstract available

[en] Bibliographical research and visits to laboratories were undertaken in order to survey the different techniques used to measure rapidly variable temperatures, specifying the limits in maximum temperature and variation rate (time constant). On the basis of the bibliographical study these techniques were classified in three categories according to the physical meaning of their response time. Extension of the bibliographical research to methods using fast temperature variation measurement techniques and visits to research and industrial laboratories gave in an idea of the problems raised by the application of these methods. The use of these techniques in fields other than those for which they were developed can sometimes be awkward in the case of thermometric probe devices where the time constant cannot generally be specified