JPS60159387U - 2-wire transmission conductivity meter - Google Patents
2-wire transmission conductivity meterInfo
- Publication number
- JPS60159387U JPS60159387U JP4689784U JP4689784U JPS60159387U JP S60159387 U JPS60159387 U JP S60159387U JP 4689784 U JP4689784 U JP 4689784U JP 4689784 U JP4689784 U JP 4689784U JP S60159387 U JPS60159387 U JP S60159387U
- Authority
- JP
- Japan
- Prior art keywords
- output
- conductivity meter
- output terminals
- wire transmission
- conductivity
- 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
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の２線伝送式導伝率計の一例を示す構成図
、第２図は本考案の一実施例を示す構成図である。
Ｔ１．Ｔ、・・・出力端子、１・・・定電流回路、２・
・・発振回路、３・・・バッファ増幅器、４・・・導電
率計、５・・・整流平滑回路、６・・・増幅器、Ｄ３・
・・ツェナーダイオード、７・・・バッファ増幅器、Ｃ
・・・中点電位点、Ａ、 Ｂ・・・正側、負側基準電位
点。FIG. 1 is a block diagram showing an example of a conventional two-wire transmission conductivity meter, and FIG. 2 is a block diagram showing an embodiment of the present invention. T1. T,...output terminal, 1...constant current circuit, 2...
... Oscillation circuit, 3... Buffer amplifier, 4... Conductivity meter, 5... Rectifier and smoothing circuit, 6... Amplifier, D3.
... Zener diode, 7... Buffer amplifier, C
...Midpoint potential point, A, B...Positive side, negative side reference potential point.
Claims (1)
の伝送線を介して遠隔点より給電されると共に、上記伝
送線を流れる電流を測定すべき導電率に対応させるよう
にした２線伝送式導電率計において、上記出力端子間に
接続され上記伝送線を流れる電流を制御する出力トラン
ジスタと、上記出力端子間に接続されるツェナーダイオ
ードを含む安定化電源回路と、上記ツェナーダイオード
の安定化電圧で駆動され上記導電率に関連した信号と上
記出力電流に関連した信号との差を増幅して上記出力ト
ランジスタを制御する増幅器と、上記安定化電圧で駆動
され導電率計に交流励振信号を供給する発振回路と、上
記安定化電圧を２分する抵抗分圧回路と、この分圧回路
の出力を受は上記発振回路に中点電位を供給するバッフ
ァ増幅器とを具備した２線伝送式導電率計。It has a pair of output terminals, and is supplied with power from a remote point via two transmission lines connected to the output terminals, and the current flowing through the transmission lines is made to correspond to the conductivity to be measured. The wire transmission conductivity meter includes: an output transistor connected between the output terminals to control the current flowing through the transmission line; a stabilizing power supply circuit including a Zener diode connected between the output terminals; an amplifier driven by a stabilized voltage to amplify the difference between a signal related to the conductivity and a signal related to the output current to control the output transistor; and an amplifier driven by the stabilized voltage to provide AC excitation to the conductivity meter. A two-wire transmission comprising an oscillation circuit that supplies a signal, a resistive voltage divider circuit that divides the stabilized voltage into two, and a buffer amplifier that receives the output of this voltage divider circuit and supplies a midpoint potential to the oscillation circuit. Type conductivity meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4689784U JPS60159387U (en) | 1984-03-30 | 1984-03-30 | 2-wire transmission conductivity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4689784U JPS60159387U (en) | 1984-03-30 | 1984-03-30 | 2-wire transmission conductivity meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60159387U true JPS60159387U (en) | 1985-10-23 |
Family
ID=30561722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4689784U Pending JPS60159387U (en) | 1984-03-30 | 1984-03-30 | 2-wire transmission conductivity meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60159387U (en) |
-
1984
- 1984-03-30 JP JP4689784U patent/JPS60159387U/en active Pending
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