JPS55143446A - Measuring instrument for difference in potential - Google Patents
Measuring instrument for difference in potentialInfo
- Publication number
- JPS55143446A JPS55143446A JP8860278A JP8860278A JPS55143446A JP S55143446 A JPS55143446 A JP S55143446A JP 8860278 A JP8860278 A JP 8860278A JP 8860278 A JP8860278 A JP 8860278A JP S55143446 A JPS55143446 A JP S55143446A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- electrode
- potential
- indicator
- 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.)
- Pending
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To measure the potential of a conductor part covered with an insulator without damaging a commodity, by using an electrode which couples electrostatically without touching.
CONSTITUTION: A voltage divided by the electrostatic capacity between electrode 4 and the conductor part of insulating electric wire 3 and the input impedance of amplifier 7 is input to amplifier 7 and the output of impedance conversion is displayed by indicator 8. At the time, if electrode 4 is constant in mechanical structure, the electrostatic capacity is constant and the input impedance of amplifier 7 is unchangeable. For the purpose, the voltage-dividing ratio is previously calibrated to make it possible to read direct a voltage value on indicator 8.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8860278A JPS55143446A (en) | 1978-07-19 | 1978-07-19 | Measuring instrument for difference in potential |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8860278A JPS55143446A (en) | 1978-07-19 | 1978-07-19 | Measuring instrument for difference in potential |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55143446A true JPS55143446A (en) | 1980-11-08 |
Family
ID=13947367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8860278A Pending JPS55143446A (en) | 1978-07-19 | 1978-07-19 | Measuring instrument for difference in potential |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55143446A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57188172U (en) * | 1981-05-25 | 1982-11-29 |
-
1978
- 1978-07-19 JP JP8860278A patent/JPS55143446A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57188172U (en) * | 1981-05-25 | 1982-11-29 |
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