JPS5782776A - Conductivity meter for ultrapure water - Google Patents

Conductivity meter for ultrapure water

Info

Publication number
JPS5782776A
JPS5782776A JP15887080A JP15887080A JPS5782776A JP S5782776 A JPS5782776 A JP S5782776A JP 15887080 A JP15887080 A JP 15887080A JP 15887080 A JP15887080 A JP 15887080A JP S5782776 A JPS5782776 A JP S5782776A
Authority
JP
Japan
Prior art keywords
temp
output
compensation
rate
amplifier
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
JP15887080A
Other languages
Japanese (ja)
Inventor
Tokuji Hosono
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.)
FUJI SEIMITSU DENKI CO Ltd
FUJI SEIMITSU DENKI KK
Original Assignee
FUJI SEIMITSU DENKI CO Ltd
FUJI SEIMITSU DENKI 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 FUJI SEIMITSU DENKI CO Ltd, FUJI SEIMITSU DENKI KK filed Critical FUJI SEIMITSU DENKI CO Ltd
Priority to JP15887080A priority Critical patent/JPS5782776A/en
Publication of JPS5782776A publication Critical patent/JPS5782776A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/22—Measuring resistance of fluids

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

PURPOSE:To improve the accuracy of measurement by determining the ratio of the compensation rate of an amplifier which is compensated of temps. at a constant rate, and the gains of a comparing amplifier and a divider and the input of an addition amplifier and approximating these to the temp. characteristics of pure water. CONSTITUTION:Constant AC voltage 2 is applied to a cell 11 for measuring conductivity provided with a temp. sensing element 12, and the electric current flowing through the cell 11 is subjected to temp. compensation at a constant rate by the element 12. The 1st output is obtained by an amplifier 3 and a linear detecting circuit 4. The 2nd output is obtained by circuits 3' and 4' performing amplification and detection at the same amplification factor as that at the reference temp. of the circuit 3 without performing temp. compensation. The 1st and nd outputs are comparatively amplified 6, the output whereof is divided 7 by using the output of the circuit 4. The output thereof is added to the output of the circuit 4. As a result, the rate of the temp. compensation is larger with the smaller conductivity of the pure water to be measured and as the conductivity increases, the rate of the temp. compensation decreases.
JP15887080A 1980-11-13 1980-11-13 Conductivity meter for ultrapure water Pending JPS5782776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15887080A JPS5782776A (en) 1980-11-13 1980-11-13 Conductivity meter for ultrapure water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15887080A JPS5782776A (en) 1980-11-13 1980-11-13 Conductivity meter for ultrapure water

Publications (1)

Publication Number Publication Date
JPS5782776A true JPS5782776A (en) 1982-05-24

Family

ID=15681199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15887080A Pending JPS5782776A (en) 1980-11-13 1980-11-13 Conductivity meter for ultrapure water

Country Status (1)

Country Link
JP (1) JPS5782776A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242830A (en) * 2005-03-04 2006-09-14 Tokyo Electric Power Co Inc:The Method for controlling resistance value of water rheostat type neutral grounding resistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242830A (en) * 2005-03-04 2006-09-14 Tokyo Electric Power Co Inc:The Method for controlling resistance value of water rheostat type neutral grounding resistor

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