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EP0404567A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Temperature reference junction for a multichannel temperature sensing system

Assignee: Schlumberger Technologies Ltd
•
Filing: 1990-06-21
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Granted: —
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Expires: 2010-06-21
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Abstract

Abstract A multi-channel remote-temperature-sensing system has a reference temperature assembly for the reference junctions (12) of a plurality of thermocouples for determining temperatures at remote points (10). The assembly comprises an array of components (2) each adapted to make thermal contact with a reference junction (12) of a respective remote-temperature-sensing thermocouple, an absolute reference thermometer (1) situated within the array for measuring an aboslute reference temperature and a thermocouple for sensing a temperature difference between the absolute reference thermometer (1) and a component of the array (2X). Data processing means (20) calculate the temperature of the component (2X) of the array from the absolute reference temperature and the temperature difference. Temperature difference sensing thermocouples may not be provided to measure the temperatures of some of the components (2) of the array, the temperatures of such components (2) being interpolated by the data processing means (20) from the measured temperature differences.

Inventors

  • 👤 Roger Lewis Raymond Tucker

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 18:44
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/10; G01K7/12; G01K7/13; G01K3/00; G01K3/08; G01K3/14

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 135 words
A reference temperature assembly for a multichannel remote temperature sensing data system comprising an array of components (2), each component (2) being adapted to make thermal contact with a reference junction (12) of a respective remote-temperature-sensing thermocouple, an absolute reference thermometer (1) being situated within the array for measuring an absolute reference temperature, characterized by a thermocouple having a first junction (17A, 17B) near to or in thermal contact with the absolute reference thermometer (1) and a second junction (16A, 16B) near to or in thermal contact with a component (2X) of the array for measuring the temperature difference between the absolute reference thermometer (1) and the component (2X), and by a data processor (20) for calculating the temperature of the component (2X) of the array from the absolute reference temperature and the temperature difference.
Claim 2
Dependent Claim 135 words
A reference temperature assembly for a multichannel remote temperature sensing data system comprising an array of components (2), each component (2) being adapted to make thermal contact with a reference junction (12) of a respective remote-temperature-sensing thermocouple, an absolute reference thermometer (1) being situated within the array for measuring an absolute reference temperature, characterized by a thermocouple having a first junction (17A, 17B) near to or in thermal contact with the absolute reference thermometer (1) and a second junction (16A, 16B) near to or in thermal contact with a component (2X) of the array for measuring the temperature difference between the absolute reference thermometer (1) and the component (2X), and by a data processor (20) for calculating the temperature of the component (2X) of the array from the absolute reference temperature and the temperature difference.
Claim 3
Dependent Claim 61 words
A reference temperature assembly according to claim 1 characterized in that the thermocouple measures the temperature difference between the absolute reference thermometer (1) and a predetermined remote component (2X) of the array and in that the data processing means (15) uses the absolute reference temperature and the measured temperature difference to interpolate the temperature of a further component (2)of the array.
Claim 4
Dependent Claim 24 words
A reference temperature assembly according to claim 1 or claim 2 characterized in that the absolute reference thermometer (1) is a platinum resistance thermometer.
Claim 5
Dependent Claim 27 words
A reference temperature assembly according to any preceding claim characterized in that the absolute reference thermometer (1) is situated substantially centrally in the array of components (2).
Claim 6
Dependent Claim 21 words
A reference temperature assembly according to any preceding claim characterized in that the array of components (2) is a rectangular array.
Claim 7
Dependent Claim 33 words
A reference temperature assembly according to claim 5 characterized in that the thermocouple measures the temperature difference between the absolute resistance thermometer (1) and a component (2X) at a corner of the array.
Claim 8
Dependent Claim 22 words
A reference temperature assembly according to any preceding claim characterized in that the components (2) of the array are 3-way terminal blocks.

References Cited (Backward Citations)

GB1516157A Cited
GB1603061A Cited
US4147061A Cited

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