JPS57182134A - Temperature measurement circuit by temperature measurement resistor - Google Patents

Temperature measurement circuit by temperature measurement resistor

Info

Publication number
JPS57182134A
JPS57182134A JP6727381A JP6727381A JPS57182134A JP S57182134 A JPS57182134 A JP S57182134A JP 6727381 A JP6727381 A JP 6727381A JP 6727381 A JP6727381 A JP 6727381A JP S57182134 A JPS57182134 A JP S57182134A
Authority
JP
Japan
Prior art keywords
resistor
resistance
temperature measurement
electric current
potential
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6727381A
Other languages
Japanese (ja)
Other versions
JPS625292B2 (en
Inventor
Kenji Yamaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP6727381A priority Critical patent/JPS57182134A/en
Publication of JPS57182134A publication Critical patent/JPS57182134A/en
Publication of JPS625292B2 publication Critical patent/JPS625292B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE:To eliminate error caused by wire route resistance by controlling to maintain a constant value regardless of the change in a temperature measurement resistance the current that flows through the temperature measurement resistance of a bridge circuit that contains temperature measurement resistance. CONSTITUTION:A resistance bridge that consists of resistors 1 and 2 for setting measurement electric current and a temperature measuring resistance 3 and a zero suppression resistor 4 is provided with a means 17 that controls so as to make the potential of the joint A of the resistor 2 for setting measurement electric current and the zero-suppression resistor 4 always the same as the potential of a reference potential point D, and at the same time the potential of the joint B of the resistor 1 for setting measurement electric current is amplified by an amplifier 19 that has a positive feedback resistor 18. Accordingly, the electric current that flows through the resistor 3 for temperature measurement becomes constant regardless of its resistance value, and errors due to voltage drop in the lead wire can be eliminated.
JP6727381A 1981-05-02 1981-05-02 Temperature measurement circuit by temperature measurement resistor Granted JPS57182134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6727381A JPS57182134A (en) 1981-05-02 1981-05-02 Temperature measurement circuit by temperature measurement resistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6727381A JPS57182134A (en) 1981-05-02 1981-05-02 Temperature measurement circuit by temperature measurement resistor

Publications (2)

Publication Number Publication Date
JPS57182134A true JPS57182134A (en) 1982-11-09
JPS625292B2 JPS625292B2 (en) 1987-02-04

Family

ID=13340185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6727381A Granted JPS57182134A (en) 1981-05-02 1981-05-02 Temperature measurement circuit by temperature measurement resistor

Country Status (1)

Country Link
JP (1) JPS57182134A (en)

Also Published As

Publication number Publication date
JPS625292B2 (en) 1987-02-04

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