JPS55149848A - Measuring instrument of induction system for surface electric potential - Google Patents
Measuring instrument of induction system for surface electric potentialInfo
- Publication number
- JPS55149848A JPS55149848A JP9638678A JP9638678A JPS55149848A JP S55149848 A JPS55149848 A JP S55149848A JP 9638678 A JP9638678 A JP 9638678A JP 9638678 A JP9638678 A JP 9638678A JP S55149848 A JPS55149848 A JP S55149848A
- Authority
- JP
- Japan
- Prior art keywords
- zero calibration
- input
- calibration circuit
- signal
- actuating
- 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 carry out zero calibration accurately by using a zero calibration circuit provided on an output side of a high input impedance amplifier.
CONSTITUTION: A zero calibration circuit 10 is connected to a high input impedance amplifier 2. A relay actuating signal and a signal for actuating the zero calibration circuit 10 are input into signal input terminals (a), (b), respectively. At a zero point setting time, i.e. at such a time that a ground potential is opposed to a detecting electrode 1 with a relay contact 7 closed, a signal enters the terminal (a) to energize a relay and open the contact 7. An actuating pulse for the zero calibration circuit 10 is then input into the terminal (b). After this actuating pulse has been input into the terminal (b), a surface to be detected of a sample is opposed to the detecting electrode 1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9638678A JPS55149848A (en) | 1978-08-07 | 1978-08-07 | Measuring instrument of induction system for surface electric potential |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9638678A JPS55149848A (en) | 1978-08-07 | 1978-08-07 | Measuring instrument of induction system for surface electric potential |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55149848A true JPS55149848A (en) | 1980-11-21 |
Family
ID=14163514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9638678A Pending JPS55149848A (en) | 1978-08-07 | 1978-08-07 | Measuring instrument of induction system for surface electric potential |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55149848A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007256141A (en) * | 2006-03-24 | 2007-10-04 | Hioki Ee Corp | Voltage detection device and initialization method |
-
1978
- 1978-08-07 JP JP9638678A patent/JPS55149848A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007256141A (en) * | 2006-03-24 | 2007-10-04 | Hioki Ee Corp | Voltage detection device and initialization method |
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