JPH0263471U - - Google Patents

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Publication number
JPH0263471U
JPH0263471U JP14211588U JP14211588U JPH0263471U JP H0263471 U JPH0263471 U JP H0263471U JP 14211588 U JP14211588 U JP 14211588U JP 14211588 U JP14211588 U JP 14211588U JP H0263471 U JPH0263471 U JP H0263471U
Authority
JP
Japan
Prior art keywords
output
operational amplifier
high voltage
generation circuit
voltage generation
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
JP14211588U
Other languages
Japanese (ja)
Other versions
JPH0637341Y2 (en
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 filed Critical
Priority to JP14211588U priority Critical patent/JPH0637341Y2/en
Publication of JPH0263471U publication Critical patent/JPH0263471U/ja
Application granted granted Critical
Publication of JPH0637341Y2 publication Critical patent/JPH0637341Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Measurement Of Resistance Or Impedance (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係る絶縁抵抗計の一実施例の
接続図、第２図は第１図の動作を説明するための
図である。 Ｒｘ…絶縁抵抗体、Ｅ…アース端子、Ｌ…ライ
ン端子、Ｕ１〜Ｕ３…演算増幅器、ＣＰ１，ＣＰ
２…コンパレータ、Ａ／Ｄ…アナログ・デイジタ
ル変換器、ＤＩＳ…表示部。 FIG. 1 is a connection diagram of an embodiment of an insulation resistance meter according to the present invention, and FIG. 2 is a diagram for explaining the operation of FIG. 1. Rx...Insulation resistor, E...Earth terminal, L...Line terminal, U1~U3...Operation amplifier, CP1, CP
2...Comparator, A/D...analog-digital converter, DIS...display unit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 直流の高電圧を発生する直流高電圧発生回路、
アース端子とライン端子間に接続され前記直流高
電圧発生回路の出力が印加される被測定の絶縁抵
抗体、前記ライン端子にその入力抵抗が接続され
た第１の演算増幅器、前記直流高電圧発生回路の
出力と第１の演算増幅器の出力とが印加され直流
高電圧発生回路の出力から第１の演算増幅器の出
力を引算する第２の演算増幅器、第１の演算増幅
器の出力が加えられる複数のコンパレータの出力
に応じてそのゲインが可変されこのゲインを第１
の演算増幅器の出力に乗じる第３の演算増幅器、
第２の演算増幅器の出力Ｖｉｎと第３の演算増幅
器の出力Ｖｒｅｆとが入力されてＶｒｅｆでＶｉ
ｎを除算するアナログ・デイジタル変換器、及び
このアナログ・デイジタル変換器より得られるデ
イジタル・データを表示するデイジタル表示器よ
りなる絶縁抵抗計。 DC high voltage generation circuit that generates DC high voltage,
an insulated resistor to be measured that is connected between a ground terminal and a line terminal and to which the output of the DC high voltage generation circuit is applied; a first operational amplifier whose input resistance is connected to the line terminal; and the DC high voltage generation circuit. The output of the circuit and the output of the first operational amplifier are applied to the second operational amplifier, which subtracts the output of the first operational amplifier from the output of the DC high voltage generation circuit, and the output of the first operational amplifier is added. The gain is varied according to the outputs of multiple comparators, and this gain is
a third operational amplifier that multiplies the output of the operational amplifier;
The output Vin of the second operational amplifier and the output Vref of the third operational amplifier are input, and Vi
An insulation resistance meter comprising an analog-to-digital converter for dividing n, and a digital display for displaying digital data obtained from the analog-to-digital converter.
JP14211588U 1988-10-31 1988-10-31 Insulation resistance tester Expired - Lifetime JPH0637341Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14211588U JPH0637341Y2 (en) 1988-10-31 1988-10-31 Insulation resistance tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14211588U JPH0637341Y2 (en) 1988-10-31 1988-10-31 Insulation resistance tester

Publications (2)

Publication Number Publication Date
JPH0263471U true JPH0263471U (en) 1990-05-11
JPH0637341Y2 JPH0637341Y2 (en) 1994-09-28

Family

ID=31407786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14211588U Expired - Lifetime JPH0637341Y2 (en) 1988-10-31 1988-10-31 Insulation resistance tester

Country Status (1)

Country Link
JP (1) JPH0637341Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11326408A (en) * 1998-04-21 1999-11-26 Illinois Tool Works Inc <Itw> Resistance measuring meter having voltage amplifier circuit
JP2018046584A (en) * 2017-12-26 2018-03-22 ルネサスエレクトロニクス株式会社 Analog-digital conversion circuit and electronic apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11326408A (en) * 1998-04-21 1999-11-26 Illinois Tool Works Inc <Itw> Resistance measuring meter having voltage amplifier circuit
JP2018046584A (en) * 2017-12-26 2018-03-22 ルネサスエレクトロニクス株式会社 Analog-digital conversion circuit and electronic apparatus

Also Published As

Publication number Publication date
JPH0637341Y2 (en) 1994-09-28

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