JPS56129870A - Burnout apparatus - Google Patents

Burnout apparatus

Info

Publication number
JPS56129870A
JPS56129870A JP3296380A JP3296380A JPS56129870A JP S56129870 A JPS56129870 A JP S56129870A JP 3296380 A JP3296380 A JP 3296380A JP 3296380 A JP3296380 A JP 3296380A JP S56129870 A JPS56129870 A JP S56129870A
Authority
JP
Japan
Prior art keywords
burnout
frequency
impedance
resistance
thermocouple
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.)
Pending
Application number
JP3296380A
Other languages
Japanese (ja)
Inventor
Shoichi Yamada
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3296380A priority Critical patent/JPS56129870A/en
Publication of JPS56129870A publication Critical patent/JPS56129870A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

PURPOSE:To accomplish a stable detection of disconnection in a thermocouple free from effect of commercial frequency by warning it through a detection high resistance or the like with an AC signal of a frequency different from the commercial power source frequency through a DC cutting capacitor. CONSTITUTION:When an FET6 is turned on, AC current of 1kHz or the like with a frequency different from the commercial power source is fed from an AC signal source by way of a capacitor 4 and a detection resistance of a high impedance provided for cutting DC current to detect burnout in a thermocouple 1. The impedance of the resistance 3 is set higher than the impedance of an equivalent resistance of the thermocouple 1 and hence, the output corresponding to both impedance ratios of an amplifier 8 is very small while no burnout occurs while larger when it occurs. Therefore, a stable detection of burnout can be done by way of a noise component removing BFP9, a comparator 10 and the like free from effect of commercial power source frequency thereby affording a necessary warning.
JP3296380A 1980-03-14 1980-03-14 Burnout apparatus Pending JPS56129870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3296380A JPS56129870A (en) 1980-03-14 1980-03-14 Burnout apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3296380A JPS56129870A (en) 1980-03-14 1980-03-14 Burnout apparatus

Publications (1)

Publication Number Publication Date
JPS56129870A true JPS56129870A (en) 1981-10-12

Family

ID=12373566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3296380A Pending JPS56129870A (en) 1980-03-14 1980-03-14 Burnout apparatus

Country Status (1)

Country Link
JP (1) JPS56129870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2498370A (en) * 2012-01-12 2013-07-17 Rolls Royce Engine Control Systems Ltd Thermocouple fault detection

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51101583A (en) * 1975-03-04 1976-09-08 Nippon Steel Corp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51101583A (en) * 1975-03-04 1976-09-08 Nippon Steel Corp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2498370A (en) * 2012-01-12 2013-07-17 Rolls Royce Engine Control Systems Ltd Thermocouple fault detection

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