JPS6184574U - - Google Patents
Info
- Publication number
- JPS6184574U JPS6184574U JP16828984U JP16828984U JPS6184574U JP S6184574 U JPS6184574 U JP S6184574U JP 16828984 U JP16828984 U JP 16828984U JP 16828984 U JP16828984 U JP 16828984U JP S6184574 U JPS6184574 U JP S6184574U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- signal
- kto
- conductivity
- conductivity meter
- 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
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
第１図は本考案の実施例装置を示す構成図、第
２図は本考案実施例装置の効果を示すグラフ、第
３図は、従来装置を示す構成図である。
１…交流電圧発生回路、４…導電率計、５…同
期整流回路、１０…割算回路、１２，１３…加減
算回路。
FIG. 1 is a block diagram showing an apparatus according to an embodiment of the present invention, FIG. 2 is a graph showing the effects of the apparatus according to an embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional apparatus. DESCRIPTION OF SYMBOLS 1...AC voltage generation circuit, 4...Conductivity meter, 5...Synchronous rectification circuit, 10...Divide circuit, 12, 13...Addition/subtraction circuit.
Claims (1)
温度、ｔ：温度、Ｋｔｏ：基準温度ｔｏにおける
導電率、α，β：定数、Ｋｔ：温度ｔにおける導
電率）と、温度センサからの温度信号に基づき得
た ［｛１＋ｂ「ｔ−ｔｏ）｝／ ｛１＋ａ（ｔ−ｔｏ）｝］ なる温度補正信号（但し、ａ，ｂ：後出の条件に
よつて定まる定数）とを掛け合せ、この演算結果
が、温度補償しようとする温度範囲内の少なくと
も３点において一定値Ｋｔｏとなるように定数ａ
，ｂを定め、この演算により前記温度範囲内にお
いてＫｔｏに近似した信号を得るようにした回路
で、前記導電率計の交流印加電圧として前記温度
信号より導いた ｛１＋ｂ（ｔ−ｔｏ）｝ なる電圧を与え、前記導電率計の検出出力に Ｋｔ・｛１＋ｂ（ｔ−ｔｏ）｝ なる信号を得て、この信号を前記温度信号より導
いた ｛１＋ａ（ｔ−ｔｏ）｝ なる信号で割算するようにしたことを特徴とする
温度補償回路。[Claims for Utility Model Registration] A conductivity signal Kt given from a conductivity meter and expressed as Kt = Kto {1 + α (t-to) + β (t-to) 2 } (where to: reference temperature, t: temperature, Kto: electrical conductivity at reference temperature to, α, β: constants, Kt: electrical conductivity at temperature t) and [{1+b ``t-to)}/ { obtained based on the temperature signal from the temperature sensor. 1+a(t-to)}] (where a, b are constants determined by the conditions described later), and the calculation result is calculated at at least three points within the temperature range for which temperature compensation is to be performed. A constant a is set so that a constant value Kto is obtained at
, b, and by this calculation obtains a signal close to Kto within the temperature range, the AC applied voltage of the conductivity meter is derived from the temperature signal to be {1+b(t-to)}. Apply a voltage, obtain a signal of Kt・{1+b(t-to)} from the detection output of the conductivity meter, and divide this signal by a signal of {1+a(t-to)} derived from the temperature signal. A temperature compensation circuit characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16828984U JPH0454463Y2 (en) | 1984-11-06 | 1984-11-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16828984U JPH0454463Y2 (en) | 1984-11-06 | 1984-11-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6184574U true JPS6184574U (en) | 1986-06-04 |
| JPH0454463Y2 JPH0454463Y2 (en) | 1992-12-21 |
Family
ID=30726065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16828984U Expired JPH0454463Y2 (en) | 1984-11-06 | 1984-11-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454463Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6381656B2 (en) * | 2014-10-03 | 2018-08-29 | 三菱電機株式会社 | Signal generation circuit |
-
1984
- 1984-11-06 JP JP16828984U patent/JPH0454463Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0454463Y2 (en) | 1992-12-21 |
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