JPS5753651A - Measuring instrument of ion concentration - Google Patents

Measuring instrument of ion concentration

Info

Publication number
JPS5753651A
JPS5753651A JP55129589A JP12958980A JPS5753651A JP S5753651 A JPS5753651 A JP S5753651A JP 55129589 A JP55129589 A JP 55129589A JP 12958980 A JP12958980 A JP 12958980A JP S5753651 A JPS5753651 A JP S5753651A
Authority
JP
Japan
Prior art keywords
electrode
voltage
circuit
drift
compensating
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
JP55129589A
Other languages
Japanese (ja)
Inventor
Noriaki Ono
Hisashi Kamiyama
Kiyozo Koshiishi
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical Co 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP55129589A priority Critical patent/JPS5753651A/en
Publication of JPS5753651A publication Critical patent/JPS5753651A/en
Pending 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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/4035—Combination of a single ion-sensing electrode and a single reference electrode

Abstract

PURPOSE:To correct automatically the electric potential variation caused by the drift of responding potential difference generating between an ion selection electrode and a reference electrode, within the range of the inputted voltage of an analog-to digital (A-D) conversion circuit by providing a compensating circuit. CONSTITUTION:Electric potential between an ion selection electrode 3 and a reference electrode 4 immersed in the liquid 2 to be tested such as blood, is inputted to an amplification circuit 5. The responding electric potential of the electrode 3 deviates sometimes from the range of the inputted voltage of an A-D conversion circuit 6, owing to the variations of temperature of liquid 2 and the operating condition of electrode. A circuit 9 compensating the drift of this responding potential difference is provided between circuits 5, 6. In the case of deviation from the range of the inpudted voltage, the lock of the compensating curcuit 9 is released temporarily, a part of drift is shifted to the original voltage to correct automatically. Thereafter, the measurment is continued similarly to the usual way.
JP55129589A 1980-09-18 1980-09-18 Measuring instrument of ion concentration Pending JPS5753651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55129589A JPS5753651A (en) 1980-09-18 1980-09-18 Measuring instrument of ion concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55129589A JPS5753651A (en) 1980-09-18 1980-09-18 Measuring instrument of ion concentration

Publications (1)

Publication Number Publication Date
JPS5753651A true JPS5753651A (en) 1982-03-30

Family

ID=15013174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55129589A Pending JPS5753651A (en) 1980-09-18 1980-09-18 Measuring instrument of ion concentration

Country Status (1)

Country Link
JP (1) JPS5753651A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180125U (en) * 1984-05-07 1985-11-29 ティーディーケイ株式会社 noise filter
JPS61150511A (en) * 1984-12-25 1986-07-09 Nippon Ferrite Ltd Noise filter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299736A (en) * 1976-02-18 1977-08-22 Toshiba Corp Data processing unit
JPS5325491A (en) * 1976-03-25 1978-03-09 Instrumentation Labor Inc Continuous calibration apparatus and method for analytical instrments

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299736A (en) * 1976-02-18 1977-08-22 Toshiba Corp Data processing unit
JPS5325491A (en) * 1976-03-25 1978-03-09 Instrumentation Labor Inc Continuous calibration apparatus and method for analytical instrments

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60180125U (en) * 1984-05-07 1985-11-29 ティーディーケイ株式会社 noise filter
JPH0233390Y2 (en) * 1984-05-07 1990-09-07
JPS61150511A (en) * 1984-12-25 1986-07-09 Nippon Ferrite Ltd Noise filter

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