公开(公告)号：JPH10253572A

公开(公告)日：1998-09-25

申请号：JP7054697

申请日：1997-03-07

Applicant: TOA ELECTRONICS

Inventor： HARADA YASUYUKI ,  KATO AKIHIKO

IPC: G01N27/30

Abstract: PROBLEM TO BE SOLVED: To dispense with setting of a value of calibration or correction at every time of replacement of an electrode and to enable free and proper use of electrodes for different purposes, by providing a storage means for the information on a measuring electrode in the measuring electrode or in a cable or a connector for connecting the measuring electrode to a device main body. SOLUTION: A type name and a serial number of an electrode given at the time of manufacture thereof are inputted as the information (data) on the electrode to a memory in the electrode 10, for instance, and calibration data are written therein at the time of inspection of the electrode. A means for reading and storing the information stored in the memory of the measuring electrode 10 is provided in a device main body 20 and also a means for writing the fresh calibration data and others in the memory of the measuring electrode 10 is provided therein. The device main body 20 corrects a pH value by computation on the basis of the calibration data read in and a potential obtained from a pH sensing part 11 of the measuring electrode 10 and displays it as a measured pH value. In a measuring device equipped with a printer, printing can also be executed as occasion demands.

公开(公告)号：JPH05203615A

公开(公告)日：1993-08-10

申请号：JP3867492

申请日：1992-01-29

Applicant: TOA ELECTRONICS

Inventor： KATO AKIHIKO ,  YAMASATO MASAHARU ,  YANAGIDA YOSHINORI ,  KONNO HIROKO

IPC: G01N27/30 ,  G01N27/26 ,  G01N27/416

Abstract: PURPOSE:To provide a method and device for restoring a changed electrode potential of a pH measuring electrode using metal oxide or metal for sensitive film to an original potential condition in a short time. CONSTITUTION:Electrode potential-changed pH measuring electrodes 1-4 using iridium oxide for pH-sensitive film are electrically shortcircuitted by electrically connecting their leads 1a-4a to each other, and they are immersed in neutral phosphate solution 5 of pH 6.86 for about an hour. The pH-measuring electrodes of which electrode potential is changed can be restored almost to an original potential condition in a short time to be stabilized, so a very good efficiency is achieved, and because they can be restored to the potential condition where calibration can be performed sufficiently to be stabilized, thereby they can be reused without being wasted and disposed as defectives.

公开(公告)号：JPH055717A

公开(公告)日：1993-01-14

申请号：JP21452391

申请日：1991-07-30

Applicant: TOA ELECTRONICS

Inventor： KATO AKIHIKO ,  YAMASATO MASAHARU ,  TAGUCHI TOMIO ,  KATSUBE TERUAKI

IPC: G01N27/30 ,  G01N27/333

Abstract: PURPOSE:To obtain a pH-measuring electrode with a metal oxide for enabling pH to be measured accurately without being affected by a coexisting substance as a pH-sensitive film. CONSTITUTION:An electrode-sensitive portion 24 consisting of a sensitive film support 21 in a specified shape and dimensions. a metal oxide film 22 which is formed on one surface of this sensitive film support for example by sputtering, and a porous insulation film 23 which is clad on an entire surface of this metal oxide film 22 by sputtering in a similar manner is fitted into a penetration hole which is formed on a bottom surface of a cylindrical support pipe 25 in a liquid-concentration state. The metal oxide film 22 which becomes a pH- sensitive film is positioned outside the support pipe 25 where its nearly half contacts a liquid whose pH is to be measured (a liquid to be measured). The porous insulation film 23 covering the metal oxide film 22 eliminates an interference substance and protects the pH-sensitive film.