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JPS55107962A - Megger - Google Patents

Megger

Info

Publication number
JPS55107962A
JPS55107962A JP1420279A JP1420279A JPS55107962A JP S55107962 A JPS55107962 A JP S55107962A JP 1420279 A JP1420279 A JP 1420279A JP 1420279 A JP1420279 A JP 1420279A JP S55107962 A JPS55107962 A JP S55107962A
Authority
JP
Japan
Prior art keywords
voltage
flowing
scale
voltmeter
terminal
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
JP1420279A
Other languages
Japanese (ja)
Inventor
Ichiro Kono
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.)
KONO GIKEN KK
KOUNO GIKEN KK
Original Assignee
KONO GIKEN KK
KOUNO GIKEN KK
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 KONO GIKEN KK, KOUNO GIKEN KK filed Critical KONO GIKEN KK
Priority to JP1420279A priority Critical patent/JPS55107962A/en
Publication of JPS55107962A publication Critical patent/JPS55107962A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To provide a complete logarithmic scale on a scale of a megger by flowing measuring and reference currents through a plurality of diodes to generate terminal voltages and processing the differential voltage of the terminal voltages.
CONSTITUTION: Rated voltages 1000, 500, 250, 100 volts or the like are used for rated voltage power supply terminals 1, 1'. An article to be measured is connected to measuring terminals 2, 2'. An insulation resistance value Rx provides a voltage at the terminal A by flowing the measuring current Ix flowing through the article to be measured at rated voltage through the first logarithmic converter diode D1. Rated voltage is applied to the reference resistor Rr to flow the reference current Ir flowing through the resistor Rr through the second logarithmic converter diode D2 to provide a voltage at the terminal E. Then, the differential voltage between the terminals A and E is amplified through high input impedance amplifiers Q1, Q2 to compensate the errors caused by the internal resistances of the diodes D1 and D2, and thus applied to a DC voltmeter M to indicate the voltage on the voltmeter M. Thus, the scale of the voltmeter may be completely converted to logarithmic scale.
COPYRIGHT: (C)1980,JPO&Japio
JP1420279A 1979-02-13 1979-02-13 Megger Pending JPS55107962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1420279A JPS55107962A (en) 1979-02-13 1979-02-13 Megger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1420279A JPS55107962A (en) 1979-02-13 1979-02-13 Megger

Publications (1)

Publication Number Publication Date
JPS55107962A true JPS55107962A (en) 1980-08-19

Family

ID=11854518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1420279A Pending JPS55107962A (en) 1979-02-13 1979-02-13 Megger

Country Status (1)

Country Link
JP (1) JPS55107962A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050497A (en) * 2005-08-19 2007-03-01 Kowa Co Ltd Bristle material for brush

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050497A (en) * 2005-08-19 2007-03-01 Kowa Co Ltd Bristle material for brush

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