JPS5713370A - Electrometer probe - Google Patents
Electrometer probeInfo
- Publication number
- JPS5713370A JPS5713370A JP8778980A JP8778980A JPS5713370A JP S5713370 A JPS5713370 A JP S5713370A JP 8778980 A JP8778980 A JP 8778980A JP 8778980 A JP8778980 A JP 8778980A JP S5713370 A JPS5713370 A JP S5713370A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- probe
- toner
- insulating plate
- electrode plate
- 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
- G01R5/00—Instruments for converting a single current or a single voltage into a mechanical displacement
- G01R5/28—Electrostatic instruments
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
PURPOSE:To prevent the entry of a toner and the like into the inside of a probe, by a method wherein an electrode plate is placed through the medium of an insulating plate at the circumference of an aperture in a probe, and a given potential is applied to the electrode plate. CONSTITUTION:An insulating plate 15, whose diameter is larger than that of an aprature 13, is placed on a surface of a casing 11 of a probe consisting of a conductor, and an electrode plate 16, whose diameter is larger than that of the insulating plate 15, is further located on the insulating plate 15. A potential, which has a reverse polarity to that of a toner potential, is applied to the electrode plate 16 by means of a D.C. power source 17 or 18, and with this a toner, which is going to enter through the aperture 13, is captured, and is prevented from entering into the inside. The electrode plate 16 is isolated from the casing 11 through the medium of the insulating plate 15, and thereby an influence is not exercised upon an potential of a detecting electrode 12 located at the inside. This completely prevents the entry of electrified dust, such as toner, into the inside of the potential probe, and permits the highly precise measurement of the potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8778980A JPS5713370A (en) | 1980-06-30 | 1980-06-30 | Electrometer probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8778980A JPS5713370A (en) | 1980-06-30 | 1980-06-30 | Electrometer probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5713370A true JPS5713370A (en) | 1982-01-23 |
Family
ID=13924741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8778980A Pending JPS5713370A (en) | 1980-06-30 | 1980-06-30 | Electrometer probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5713370A (en) |
-
1980
- 1980-06-30 JP JP8778980A patent/JPS5713370A/en active Pending
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