JPS6191169U - - Google Patents
Info
- Publication number
- JPS6191169U JPS6191169U JP17626784U JP17626784U JPS6191169U JP S6191169 U JPS6191169 U JP S6191169U JP 17626784 U JP17626784 U JP 17626784U JP 17626784 U JP17626784 U JP 17626784U JP S6191169 U JPS6191169 U JP S6191169U
- Authority
- JP
- Japan
- Prior art keywords
- operational amplifier
- output
- pure water
- conductivity
- voltage
- 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.)
- Granted
Links
- 238000005259 measurement Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 7
- 239000003792 electrolyte Substances 0.000 claims 2
- 238000004090 dissolution Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
第１図及び第２図は、それぞれ本考案の実施例
を示す図、第３図は、本案装置による測定結果を
示す曲線図で、ＳＡＣ及びＳＤＣ：測定用電源、
ＣＲ：抵抗率測定用セル、Ａ１ないしＡ６：演算
増幅器、Ｒ１，Ｒ４，Ｒ５，Ｒ６，Ｒ９及びＲ１
０：入力抵抗、Ｒ２，Ｒ３，Ｒ７，Ｒ８及びＲ１
１：帰還抵抗、ＲＴＨ１及びＲＴＨ２：温度補償
用抵抗素子、Ｃ１：帰還コンデンサ、Ｃ２：平滑
コンデンサ、Ｄ１及びＤ２：整流用ダイオード、
ＴＯ：出力端子、ＤＡ：直流・交流変換器、ＡＤ
：交流・直流変換器である。
FIG. 1 and FIG. 2 are diagrams each showing an embodiment of the present invention, and FIG. 3 is a curve diagram showing measurement results by the device of the present invention. SAC and SDC: power supply for measurement;
CR: cell for resistivity measurement, A 1 to A 6 : operational amplifier, R 1 , R 4 , R 5 , R 6 , R 9 and R 1
0 : Input resistance, R 2 , R 3 , R 7 , R 8 and R 1
1 : Feedback resistor, RTH 1 and RTH 2 : Temperature compensation resistance element, C 1 : Feedback capacitor, C 2 : Smoothing capacitor, D 1 and D 2 : Rectifier diode,
TO: Output terminal, DA: DC/AC converter, AD
:It is an AC/DC converter.
Claims (1)
の温度特性を表わす関数をｆ（ｔ）、電解質の溶
解が皆無であると想定した理想純水の温度２５°
Ｃにおける導電率をＫｏ２５、前記理想純水にお
ける導電率の温度特性を表わす関数をｇ（ｔ）と
した場合、測定用電圧の加えられる第１の演算増
幅器Ａ３と、前記関数ｆ（ｔ）に対応する入出力
特性を有し、前記第１の演算増幅器Ａ３の出力が
加えられる第２の演算増幅器Ａ４と、被測定純水
の抵抗率測定用セルに内装した対向電極が帰還回
路に挿入され、前記第２の演算増幅器Ａ４の出力
が加えられる第３の演算増幅器Ａ５と、この第３
の演算増幅器Ａ５の出力が帰還用コンデンサＣ１
を介して加えられると共に、前記導電率Ｋｏ２５
に比例する出力を前記第１の演算増幅器Ａ３に加
える第４の演算増幅器Ａ１と、前記関数の比ｇ（
ｔ）ｆ（ｔ）に対応する入出力特性を有し、前記
第４の演算増幅器Ａ１の出力が加えられると共に
、出力を前記第１の演算増幅器Ａ３に加える第５
の演算増幅器Ａ２と、前記第３の演算増幅器Ａ５
の出力を整流して出力端子に送出する整流回路と
より成ることを特徴とする純水の抵抗率測定装置
。 (2) 測定用電圧が交流電圧である実用新案登録
請求の範囲第１項記載の純水の抵抗率測定装置。 (3) 測定用電圧が直流電圧で、第２及び第３の
演算増幅器（Ａ４及びＡ５）間に直流・交流変換
器を、帰還用コンデンサＣ１及び第４の演算増幅
器Ａ１間に交流・直流変換器をそれぞれ介在せし
めた実用新案登録請求の範囲第１項記載の純水の
抵抗率測定装置。[Claims for Utility Model Registration] (1) The function representing the temperature characteristics of electrical conductivity in pure water in which electrolyte is dissolved is f(t), and the temperature of ideal pure water assuming that there is no dissolution of electrolyte is 25. °
If the conductivity at C is Ko 25 and the function representing the temperature characteristic of the conductivity in the ideal pure water is g(t), then the first operational amplifier A 3 to which the measurement voltage is applied and the function f(t ), to which the output of the first operational amplifier A3 is applied, and the counter electrode installed in the cell for measuring the resistivity of pure water to be measured. a third operational amplifier A5 inserted into the circuit and to which the output of the second operational amplifier A4 is added;
The output of the operational amplifier A5 is connected to the feedback capacitor C1
and the conductivity Ko 25
a fourth operational amplifier A1 which adds an output proportional to the function g(
t) a fifth operational amplifier having input/output characteristics corresponding to f(t), to which the output of the fourth operational amplifier A1 is applied, and whose output is applied to the first operational amplifier A3 ;
operational amplifier A2 , and the third operational amplifier A5.
A pure water resistivity measuring device characterized by comprising a rectifier circuit that rectifies the output of the circuit and sends it to an output terminal. (2) The pure water resistivity measuring device according to claim 1, wherein the measuring voltage is an alternating current voltage. (3) If the measurement voltage is a DC voltage, a DC/AC converter is installed between the second and third operational amplifiers ( A4 and A5 ), and a DC/AC converter is installed between the feedback capacitor C1 and the fourth operational amplifier A1. A pure water resistivity measuring device according to claim 1, which includes an AC/DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17626784U JPH052864Y2 (en) | 1984-11-20 | 1984-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17626784U JPH052864Y2 (en) | 1984-11-20 | 1984-11-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6191169U true JPS6191169U (en) | 1986-06-13 |
| JPH052864Y2 JPH052864Y2 (en) | 1993-01-25 |
Family
ID=30733866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17626784U Expired - Lifetime JPH052864Y2 (en) | 1984-11-20 | 1984-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH052864Y2 (en) |
-
1984
- 1984-11-20 JP JP17626784U patent/JPH052864Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH052864Y2 (en) | 1993-01-25 |
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