JPH0310254U - - Google Patents
Info
- Publication number
- JPH0310254U JPH0310254U JP7043489U JP7043489U JPH0310254U JP H0310254 U JPH0310254 U JP H0310254U JP 7043489 U JP7043489 U JP 7043489U JP 7043489 U JP7043489 U JP 7043489U JP H0310254 U JPH0310254 U JP H0310254U
- Authority
- JP
- Japan
- Prior art keywords
- operational amplifier
- electrode
- measurement liquid
- converter
- liquid
- 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
- 239000007788 liquid Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
第１図は本考案の１実施例の構成を示す回路図
、第２図はｐＨ変換器の検出部の構成を示す構成
図、第３図は第２図に示す構成の電気的な等価回
路図、第４図は従来のｐＨ変換器の初段の回路構
成を示す回路図である。
１０……容器、１１……ガラス電極、１２……
比較電極、１３……液電極、ＬＳ……液絡部、Ｌ
Ｑ……測定液、ＧＳ……ガラス膜、ＧＴ，ＲＴ，
ＬＴ……端子、Ｑ１〜Ｑ５……演算増幅器。
Figure 1 is a circuit diagram showing the configuration of one embodiment of the present invention, Figure 2 is a configuration diagram showing the configuration of the detection section of the pH converter, and Figure 3 is an electrical equivalent circuit of the configuration shown in Figure 2. 4 are circuit diagrams showing the circuit configuration of the first stage of a conventional pH converter. 10... Container, 11... Glass electrode, 12...
Reference electrode, 13...liquid electrode, LS...liquid junction, L
Q...Measurement liquid, GS...Glass membrane, GT, RT,
LT...terminal, Q1 to Q5 ...operational amplifier.
Claims (1)
間に発生する直流起電力から前記測定液のｐＨ値
を測定するｐＨ変換器において、入力の一端が回
路の共通電位点に接続されると共にその他端が前
記比較電極に接続されさらに出力端が前記測定液
の電位を取り出す液電極に接続された第１演算増
幅器と、前記ガラス電極と前記共通電位点との間
の電位を測定する第２演算増幅器とを有し、この
第２演算増幅器の出力端から前記ｐＨ値を得るこ
とを特徴とするｐＨ変換器。 In a pH converter that measures the pH value of a measurement liquid from a DC electromotive force generated between a glass electrode immersed in the measurement liquid and a reference electrode, one end of the input is connected to a common potential point of the circuit, and a first operational amplifier whose other end is connected to the reference electrode and whose output end is connected to the liquid electrode for extracting the potential of the measurement liquid; and a second operational amplifier that measures the potential between the glass electrode and the common potential point. A pH converter comprising a second operational amplifier, the pH value being obtained from an output terminal of the second operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7043489U JPH0723737Y2 (en) | 1989-06-16 | 1989-06-16 | pH converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7043489U JPH0723737Y2 (en) | 1989-06-16 | 1989-06-16 | pH converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0310254U true JPH0310254U (en) | 1991-01-31 |
| JPH0723737Y2 JPH0723737Y2 (en) | 1995-05-31 |
Family
ID=31606589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7043489U Expired - Fee Related JPH0723737Y2 (en) | 1989-06-16 | 1989-06-16 | pH converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723737Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013142591A (en) * | 2012-01-10 | 2013-07-22 | Disco Abrasive Syst Ltd | Mixture supply device |
-
1989
- 1989-06-16 JP JP7043489U patent/JPH0723737Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013142591A (en) * | 2012-01-10 | 2013-07-22 | Disco Abrasive Syst Ltd | Mixture supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0723737Y2 (en) | 1995-05-31 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |