The Behavior of Type K Thermocouples in Temperature Measurement: The Chromel P‐Alumel Thermocouples

1971 ◽  
Vol 42 (5) ◽  
pp. 644-653 ◽  
Author(s):  
M. Campari ◽  
S. Garribba
Keyword(s):  
Temperature Measurement ◽  
Type K

scholarly journals Correlation Between Insulation Resistance and Temperature Measurement Error in Type K and Type N Mineral Insulated, Metal Sheathed Thermocouples

2022 ◽  
Vol 43 (3) ◽  
Author(s):  
Jonathan Pearce ◽  
Declan Tucker ◽  
Carmen García Izquierdo ◽  
Raul Caballero ◽  
Trevor Ford ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Measurement Errors ◽  
Insulation Resistance ◽  
Monitoring And Control ◽  
Type K ◽  
Reference Type ◽  
Process Monitoring And Control ◽  
Resistance Breakdown ◽  
And Control

AbstractMineral insulated, metal sheathed (MI) Type K and Type N thermocouples are widely used in industry for process monitoring and control. One factor that limits their accuracy is the dramatic decrease in the insulation resistance at temperatures above about 600 °C which results in temperature measurement errors due to electrical shunting. In this work the insulation resistance of a cohort of representative MI thermocouples was characterised at temperatures up to 1160 °C, with simultaneous measurements of the error in indicated temperature by in situ comparison with a reference Type R thermocouple. Intriguingly, there appears to be a systematic relationship between the insulation resistance and the error in the indicated temperature. At a given temperature, as the insulation resistance decreases, there is a corresponding increasingly negative error in the temperature measurement. Although the measurements have a relatively large uncertainty (up to about 1 °C in temperature error and up to about 10 % in insulation resistance measurement), the trend is apparent at all temperatures above 600 °C, which suggests that it is real. Furthermore, the correlation disappears at temperatures below about 600 °C, which is consistent with the well-established diminution of insulation resistance breakdown effects below that temperature. This raises the intriguing possibility of using the as-new MI thermocouple calibration as an indicator of insulation resistance breakdown: large deviations of the electromotive force (emf) in the negative direction could indicate a correspondingly low insulation resistance.

scholarly journals Temperature measurement errors with type K (Chromel vs Alumel) thermocouples due to short‐ranged ordering in Chromel

1975 ◽  
Vol 46 (11) ◽  
pp. 1447-1461 ◽  
Author(s):  
T. G. Kollie ◽  
J. L. Horton ◽  
K. R. Carr ◽  
M. B. Herskovitz ◽  
C. A. Mossman
Keyword(s):  
Temperature Measurement ◽  
Measurement Errors ◽  
Type K

Temperature Measurement in Laminar Free Convection Using Electro-Optic Holography

1997 ◽  
Vol 7 (9) ◽  
pp. 1893-1898 ◽  
Author(s):  
G. Schirripa Spagnolo ◽  
D. Ambrosini ◽  
A. Ponticiello ◽  
D. Paoletti
Keyword(s):  
Free Convection ◽  
Temperature Measurement ◽  
Electro Optic

Study on Temperature Measurement using MRI during Acupuncture and Moxibustion

2015 ◽  
Vol 135 (10) ◽  
pp. 1205-1209
Author(s):  
Suguru Nakamura ◽  
Masamichi Nakamura ◽  
Eiichi Maeda ◽  
Yoshio Nikawa
Keyword(s):  
Temperature Measurement ◽  
Acupuncture And Moxibustion

ON-LINE TEMPERATURE MEASUREMENT IN A PLASMA REACTOR FOR FULLERENE SYNTHESIS

2003 ◽  
Vol 7 (1) ◽  
pp. 43-49 ◽  
Author(s):  
S. Abanades ◽  
J. M. Badie ◽  
Gilles Flamant ◽  
L. Fulcheri ◽  
J. Gonzales-Aguilar ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Plasma Reactor ◽  
On Line ◽  
Line Temperature
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