JPS57204460A - Connected monitoring circuit - Google Patents

Connected monitoring circuit

Info

Publication number
JPS57204460A
JPS57204460A JP56089563A JP8956381A JPS57204460A JP S57204460 A JPS57204460 A JP S57204460A JP 56089563 A JP56089563 A JP 56089563A JP 8956381 A JP8956381 A JP 8956381A JP S57204460 A JPS57204460 A JP S57204460A
Authority
JP
Japan
Prior art keywords
pulse
contacts
closed loop
pair
socket
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
JP56089563A
Other languages
Japanese (ja)
Inventor
Kunio Matsumoto
Kiyoshi Matsui
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56089563A priority Critical patent/JPS57204460A/en
Publication of JPS57204460A publication Critical patent/JPS57204460A/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
    • G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
    • G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
    • G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Leads Or Probes (AREA)

Abstract

PURPOSE:To detect contact failure of an object to be connected and a tester in case of testing electronic parts, by connecting in series 2 pulse transformers between contacts of a socket, and detecting a pulse applied to one, by the other. CONSTITUTION:When a pulse is inputted from an input terminal 25, this applied pulse induces pulse voltage to a closed loop through a pulse transformer 23. In this case, when a lead pin 4 is connected satisfactorily to a pair of contacts 17, 18 of a socket 7, a closed loop of the pair of contacts 17, 18 and the pulse transformers 23, 24 forms a real closed loop, and a current flows to the closed loop. On the other hand, in the event of contact failure of the lead pin 4 and the pair of contacts 17, 18, the closed loop is cut off at that point, and the pulse current does not flow. Accordingly, whether the lead pin 4 and the pair of contacts 17, 18 of the socket 7 are connected satisfactorily or not can be decided by depending on whether a detecting pulse is detected by an output terminal 26 through a pulse transformer 24 or not.
JP56089563A 1981-06-12 1981-06-12 Connected monitoring circuit Pending JPS57204460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56089563A JPS57204460A (en) 1981-06-12 1981-06-12 Connected monitoring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56089563A JPS57204460A (en) 1981-06-12 1981-06-12 Connected monitoring circuit

Publications (1)

Publication Number Publication Date
JPS57204460A true JPS57204460A (en) 1982-12-15

Family

ID=13974278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56089563A Pending JPS57204460A (en) 1981-06-12 1981-06-12 Connected monitoring circuit

Country Status (1)

Country Link
JP (1) JPS57204460A (en)

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