JPS5710464A - Conduction meter - Google Patents
Conduction meterInfo
- Publication number
- JPS5710464A JPS5710464A JP8453180A JP8453180A JPS5710464A JP S5710464 A JPS5710464 A JP S5710464A JP 8453180 A JP8453180 A JP 8453180A JP 8453180 A JP8453180 A JP 8453180A JP S5710464 A JPS5710464 A JP S5710464A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- zero point
- switch
- signals
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
- G01R17/06—Automatic balancing arrangements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE:To automatically correct zero point fluctuation caused by the fluctuation of the electrostatic capacity of a cable as well as of the insulation resistance by impressing the fixed voltage intermittently on the opposing electrodes to perform subtruction between the conductivity signals and the zero point error signals. CONSTITUTION:The fixed voltage V is impressed intermittently on the electrodes X and Y from inside of the current/voltage transducer 1 through the intermittent working of the switch SW. When the switch SW is in the OFF state, the zero point error voltage caused by the insulation resistance Rb and Rc, the electrostatic capacity Cb of the cable CBL is retained by the capacitor C1 through the gate Q. Thereafter, when the switch SW is turned ON, the voltage based on the conductivity of the substance to be measured is supplied to the operation circuit 3 to retain the difference voltage from the zero point error voltage through the gate Q2. Thereby the correct conductivity measurement value can be obtained and also the cable length as well as the frequency of the impressed AC signals can be freely selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8453180A JPS5710464A (en) | 1980-06-24 | 1980-06-24 | Conduction meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8453180A JPS5710464A (en) | 1980-06-24 | 1980-06-24 | Conduction meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5710464A true JPS5710464A (en) | 1982-01-20 |
Family
ID=13833215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8453180A Pending JPS5710464A (en) | 1980-06-24 | 1980-06-24 | Conduction meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5710464A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003066077A (en) * | 2001-08-24 | 2003-03-05 | Dkk Toa Corp | Conductivity meter |
-
1980
- 1980-06-24 JP JP8453180A patent/JPS5710464A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003066077A (en) * | 2001-08-24 | 2003-03-05 | Dkk Toa Corp | Conductivity meter |
| JP4707893B2 (en) * | 2001-08-24 | 2011-06-22 | 東亜ディーケーケー株式会社 | Conductivity meter |
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