JP2016050809A - Measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring device sufficient with updating of an electrode body only when the electrode is damaged.SOLUTION: External storage means is positioned outside of the device main body, and is physically indivisible with the measurement signal cable. Calibration processing means is positioned inside the device main body, and generates calibration data based on a value obtained by the measurement signal cable at the time of calibrating the measurement electrode so as to be stored in the external storage means. The measurement processing means is positioned inside the device main body, and generates measurement data based on the calibration data stored in the external storage means at the measurement time and the value obtained from the measurement signal cable. Responsibility of the electrode and the measurement signal cable is secured by adhering a seal across the electrode and the measurement signal cable 20. As a result, when the electrode is deteriorated or damaged, it is sufficient only to exchange the electrode.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a potentiometric automatic titration apparatus, and more particularly to a measurement apparatus in which a measurement electrode includes a storage means.

  In measuring devices such as pH meters and ion meters that are detachable from the main body of the device, the characteristics of each electrode are calibrated using a standard solution before use, and measurement is performed based on this calibration data. The value is calculated and corrected.

  Therefore, as described above, in the conventional measuring apparatus, since the data calibrated when using the electrode is stored in the memory in the apparatus main body, when the electrode is replaced with another electrode, this data is stored. Calibration must be performed again using standard solutions for new electrodes.

  Some measurement devices store several calibration values and can select and use an appropriate value from the multiple values, but the user must remember which data belongs to which electrode. Don't be. That is, the apparatus main body could not automatically identify the electrode.

  In order to solve the above problems, in Japanese Patent No. 3828903, the electrode has a storage means for storing the calibration data of the electrode, and the calibration data of the storage means on the apparatus side and the electrode side are stored before the measurement. There is disclosed a measuring apparatus that starts measurement after matching calibration data stored in a storage means. Japanese Patent No. 4167274 discloses that electrode deterioration information is handled by the electrode-side storage means.

Japanese Patent No. 3828903 Japanese Patent No. 4167274

  However, in the configuration disclosed in the above two conventional patent documents, since the electrode and the storage means on the electrode side are inseparable, when the electrode is damaged or deteriorated, both the electrode and the storage means associated therewith are exchanged simultaneously. It is necessary to dispose of the storage means which has great economic disadvantages and is not damaged.

  The present invention has been proposed in view of the above-described conventional circumstances, and an object of the present invention is to provide a measuring apparatus that only needs to be replaced if the electrode is damaged or deteriorated.

  The present invention is based on the premise of a measuring apparatus that includes an apparatus main body and a measurement electrode connected to the apparatus main body by a measurement signal cable, and the measurement signal cable is detachable from both the apparatus main body and the measurement electrode. And comprises the following external storage means, calibration processing means, and measurement processing means.

  The external storage means is placed outside the apparatus main body and physically inseparable from the measurement signal cable. The calibration processing means is placed inside the apparatus main body, generates calibration data based on the value obtained from the measurement signal cable when the measurement electrode is calibrated, and stores it in the external storage means. Further, the measurement processing means is placed inside the apparatus main body, and generates measurement data based on calibration data stored in the external storage means at the time of measurement and a value obtained from the measurement signal cable. Yes. Further, by sticking the seal 60 across the electrode 10 and the measurement signal cable 20, compatibility between the electrode and the measurement signal cable is ensured.

  In the above configuration, since the storage means is inseparable from the measurement signal cable, when the electrode is deteriorated or broken, it is only necessary to replace the electrode, and the measurement signal cable and the external storage means continue to the new electrode that has been replaced. It can be used.

It is a figure which shows the outline | summary of this invention. It is a functional block diagram on the main body side.

  FIG. 1 is a diagram showing an outline of the present invention, and FIG. 2 is a functional block diagram on the main body side. FIG. 1 and FIG. 2 show the case where the present invention is applied to a pH titration apparatus.

  A potentiometric titration apparatus such as a pH titration apparatus generates measurement data by processing values received from the electrode 10 and the electrode through the measurement signal cable 20, and displays the measurement data from the apparatus main body 30 for display and printing. Become.

  One end of the measurement signal cable 20 can be detachably connected to the measurement electrode 10, and the other end of the measurement signal cable 20 can be connected to a predetermined connector 301 of the apparatus main body 30. A storage means 40 is physically fixed to the measurement signal cable 20 in an indivisible state, and a data cable 50 that can be connected to the main body is provided in the storage means 40 so that it can be connected to a predetermined connector 302 on the main body side. It has become. The “physically indivisible state” may be that the measurement signal cable 20 and the data cable 50 are physically integrated, for example, as shown in FIG.

  In the apparatus main body 30, calibration processing means 31, measurement processing means 32, and initial processing means 34 described below are provided. Hereinafter, the functions of the calibration processing means 31 and the measurement processing means 32 will be clarified while explaining the calibration procedure and the measurement procedure.

<Electrodes that require calibration information>
(Initial use)
First, one end of the measurement signal cable 20 including the external storage means 40 is connected to the electrode 10 (here, a pH electrode) to be used, and the other end is connected to the connector 301 of the apparatus main body 30. Further, the data cable 50 extended from the external storage means 40 is connected to the connector 302 of the apparatus main body 30.

  When the connection is completed, the initial processing means 34 of the apparatus main body 30 performs the initialization operation of the external storage means 40, and additionally, the electrode serial number, the electrode type, and the electrode type (hereinafter referred to as electrode information). Registration is performed in the external storage unit 40 and the memory 35 in the apparatus main body 30.

  A pH standard solution (for example, pH 7 and pH 4 standard solutions) is used, and the measurement electrode 10 is calibrated by the calibration processing means 31 in the apparatus main body 30. When calibration is performed, the calibration processing means 31 stores the initial calibration date, calibration value (pH 7 and corresponding potential value, pH 4 and corresponding potential value), and temperature at the time of calibration (hereinafter referred to as calibration) in the external storage means 40. Information).

  At the time of measurement, the potential obtained from the measurement electrode 10 is read by the measurement processing means 32 of the apparatus main body 30, and the calibration information recorded in the external storage means 40 is read, and the pH value is determined based on the calibration information. Is calculated and necessary display or printing is performed by the display printing means 33.

(From the second time on)
Since the pH electrode is affected by the environment such as temperature and humidity, it must be calibrated periodically. Therefore, when the calibration process is performed again, the measurement signal cable 20 is connected to the electrode 10 and the apparatus main body 30 as described above. At this time, the initial processing unit 34 writes the previous calibration information in the external storage unit 40. Check whether or not.

  Here, if written, a pH standard solution (for example, pH 7 and pH 4 standard solution) is used, and the calibration electrode 31 is used to calibrate the measuring electrode 10. When the calibration is completed, the calibration processing unit 31 stores calibration data such as a calibration date, a calibration value (pH 7 and a corresponding potential value, pH 4 and a corresponding potential value), temperature at the time of calibration, and the like in the external storage unit 40. Record. Here, the previous calibration data is updated with new calibration data, but the first calibration date is left as it is.

  As in the previous time, when the measurement is performed, the pH value is calculated based on the potential obtained from the measurement electrode 10 by the measurement processing unit 32 and the calibration information recorded in the external storage unit 40, and the display printing unit At 33, display or printing is performed.

  In the above description, when the previous calibration information has not been written, this is the first use, and the initial use step is executed.

(Expiration date)
The initial calibration date recorded in the external storage means 40 is read for each calibration process, and the period from the initial calibration to the present is calculated. When the period exceeds the expiration date information (for example, one year) stored in the memory 35 of the apparatus main body 30, it is displayed on the apparatus main body that it is the replacement period of the measurement electrode. Thus, when the time limit has passed or when the measurement electrode is damaged, the measurement electrode 10 is removed from the measurement signal cable 20, replaced with a new measurement electrode, and the calibration operation is performed again.

<Electrodes that do not require calibration information>
The present invention is applicable not only to electrodes that require calibration work but also to electrodes that do not require calibration work.

  Similarly to the above, one end of the signal electrode cable 20 is connected to the measurement electrode 10 that uses it, and the other end is connected to the apparatus main body 30. Next, the initial processing means 34 of the apparatus main body 30 performs the initialization operation of the external storage means 40, and the serial number of the electrode, the electrode type, the electrode type, and the use start date are stored in the memory 35 in the apparatus main body 30 and It is stored in the external storage means 40.

  Prior to the start of each subsequent measurement operation, the apparatus main body 30 uses the expiration date information (for example, one year) set in the memory 35 inside the apparatus main body 30 and uses start date information recorded in the external storage means 40. The date of the apparatus main body is checked, and if the time limit has come, it is displayed on the apparatus main body that the electrode replacement time limit is reached.

  According to the above display or when the measurement electrode is broken, the measurement electrode 10 is removed from the measurement signal cable 20 and replaced with a new measurement electrode 10. Perform initial registration again.

  In the present application, the electrode 10 and the measurement signal cable 20 are detachable. Accordingly, the calibration information is established only when the specific electrode 10 and the specific measurement signal cable 20 are in a 1: 1 correspondence. In order to establish this correspondence, it is not usually necessary to peel off the connection portion between the electrode 10 and the measurement signal cable 20, but the seal 60 that can be intentionally peeled is straddled across the electrode 10 and the measurement signal cable 20. paste. Various other modes can be considered for the configuration of the relationship holding means for ensuring the correspondence between the specific electrode 10 and the specific measurement signal cable 20.

  As described above, according to the present invention, even if the electrode is damaged or deteriorated with age, it can be replaced with a commercially available electrode, and the apparatus becomes inexpensive.

DESCRIPTION OF SYMBOLS 10 Measurement electrode 20 Measurement signal cable 30 Apparatus main body 31 Calibration processing means 32 Measurement processing means 33 Display printing means 34 Initial processing means 35 Memory 40 External storage means 50 Data cable

Claims (1)

In a measuring device comprising a device body and a measurement electrode connected to the device body by a measurement signal cable, the measurement signal cable being detachable from both the device body and the measurement electrode,
External storage means placed outside the device and physically inseparable from the measurement signal cable;
Calibration processing means placed inside the apparatus for generating calibration data based on data obtained from the measurement signal cable at the time of calibration of the measurement electrode and storing it in the external storage means;
Calibration processing stored in the external storage means at the time of measurement, measurement processing means placed inside the apparatus for generating measurement data based on the data obtained from the measurement signal cable,
A relationship holding means for ensuring a correspondence between a specific measurement electrode and a specific measurement signal cable;
Measuring device characterized by comprising

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