DE3943346C2 - - Google Patents

Info

Publication number
DE3943346C2
DE3943346C2 DE3943346A DE3943346A DE3943346C2 DE 3943346 C2 DE3943346 C2 DE 3943346C2 DE 3943346 A DE3943346 A DE 3943346A DE 3943346 A DE3943346 A DE 3943346A DE 3943346 C2 DE3943346 C2 DE 3943346C2
Authority
DE
Germany
Prior art keywords
phase
voltage
cell
current
compensation current
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.)
Expired - Lifetime
Application number
DE3943346A
Other languages
German (de)
English (en)
Other versions
DE3943346A1 (de
Inventor
Kiwao Seki
Koji Katsuta Jp Tsutsuta
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
Publication of DE3943346A1 publication Critical patent/DE3943346A1/de
Application granted granted Critical
Publication of DE3943346C2 publication Critical patent/DE3943346C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
    • G01N27/07—Construction of measuring vessels; Electrodes therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
DE3943346A 1988-12-29 1989-12-29 Vorrichtung zum messen der elektrischen leitfaehigkeit von fluessigkeiten Granted DE3943346A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63331790A JPH0718903B2 (ja) 1988-12-29 1988-12-29 電気伝導度測定装置

Publications (2)

Publication Number Publication Date
DE3943346A1 DE3943346A1 (de) 1990-07-05
DE3943346C2 true DE3943346C2 (US06373033-20020416-M00071.png) 1992-07-23

Family

ID=18247670

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3943346A Granted DE3943346A1 (de) 1988-12-29 1989-12-29 Vorrichtung zum messen der elektrischen leitfaehigkeit von fluessigkeiten

Country Status (3)

Country Link
US (1) US5138264A (US06373033-20020416-M00071.png)
JP (1) JPH0718903B2 (US06373033-20020416-M00071.png)
DE (1) DE3943346A1 (US06373033-20020416-M00071.png)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5480555A (en) * 1994-06-06 1996-01-02 Robertshaw Controls Company Control system for a water softener, control device therefor and methods of making the same
US5504430A (en) * 1994-06-29 1996-04-02 Andersson; Lars Method and apparatus of conductivity measurement
GB9419882D0 (en) * 1994-10-03 1994-11-16 Mcnaughtan Arthur Electrochemical detection system
US5945830A (en) * 1996-04-26 1999-08-31 Biosepra, Inc. Flow through fluid pH and conductivity sensor
NL1011540C2 (nl) * 1999-03-12 2000-10-03 Nmi Van Swinden Lab B V Meetcel voor het meten van de geleidbaarheid van vloeistoffen en werkwijze voor het meten van de geleidbaarheid van een vloeistof.
US7405572B2 (en) * 2005-05-02 2008-07-29 Invensys Systems, Inc. Non-metallic flow-through electrodeless conductivity sensor and leak detector
US7148694B1 (en) * 2005-06-03 2006-12-12 The United States Of America As Represented By The Secretary Of The Navy Contact impedance test circuit and method
US20100321036A1 (en) * 2009-06-22 2010-12-23 Delaware Capital Formation, Inc. Dual tone measurement of conductivity and dielectric properties
EP2976650B1 (en) * 2013-03-15 2021-05-05 Ilium Technology, Inc. Apparatus and method for measuring electrical properties of matter
CN103728497B (zh) * 2013-10-29 2016-01-20 高玉琴 一种溶液电导率的测量电路
JP6836224B2 (ja) * 2017-07-07 2021-02-24 株式会社島津製作所 電気伝導度検出器及び位相調整値を求めるための方法
JP6988925B2 (ja) * 2018-02-09 2022-01-05 株式会社島津製作所 電気伝導度検出器及びバックグランド減算信号の位相調整値を求めるための方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868315A (en) * 1972-07-12 1975-02-25 Exxon Research Engineering Co Electronic measurement of end point of asphalt oxidation
US3778707A (en) * 1972-12-14 1973-12-11 Agridustrial Electronics Means for measuring loss tangent of material for determining moisture content
JPS533872A (en) * 1976-07-01 1978-01-13 Kyoto Denshi Kougiyou Kk Method of measuring conductivity of solution
US4513248A (en) * 1980-11-17 1985-04-23 Conax Corporation Fluid conductivity sensor
JPS61178457A (ja) * 1985-01-30 1986-08-11 日瀝化学工業株式会社 セメント混合物の水中施工方法
JPS62167456A (ja) * 1985-11-30 1987-07-23 Shimadzu Corp 電気伝導度検出器
JP2568620B2 (ja) * 1988-03-29 1997-01-08 愛知時計電機株式会社 電磁流量計
JPH0718902B2 (ja) * 1988-10-19 1995-03-06 株式会社日立製作所 電気伝導度検出器

Also Published As

Publication number Publication date
JPH02179480A (ja) 1990-07-12
DE3943346A1 (de) 1990-07-05
JPH0718903B2 (ja) 1995-03-06
US5138264A (en) 1992-08-11

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee