GB1526059A - Electrometer - Google Patents
ElectrometerInfo
- Publication number
- GB1526059A GB1526059A GB4859675A GB4859675A GB1526059A GB 1526059 A GB1526059 A GB 1526059A GB 4859675 A GB4859675 A GB 4859675A GB 4859675 A GB4859675 A GB 4859675A GB 1526059 A GB1526059 A GB 1526059A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potential
- meter
- probe
- switch
- source follower
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
1526059 Measuring electrostatic potential XEROX CORP 26 Nov 1975 [16 Dec 1974 (2)] 48596/75 Heading G1U An electrostatic potential measuring system incorporates a probe 30, as described in Specification 1483366, which is referred to, and a switch 24 by which either the probe sensor 28 can be connected as shown via a terminal A to a source follower 42 and a meter 66 to display the probe potential, or in order to zeroize the circuit and correct for any drift the probe sensor 28 can be grounded via one of three terminals C which are bridged by the switch, and simultaneously the potential across the meter is fedback via an integrator A2,80 and a resistor 82 and connected, together with ground, to the input of the source follower, whereby the potential across a bias capacitor 78 between the input to the source follower and a floating battery 59 is changed to bring the potential across the meter to zero. The circuit also includes an amplifier A1 which compares a fraction of the battery voltage from a potential divider 84,86 with the voltage across a Zener 74, so that, if with the switch in position C, the battery voltage is too low, a large positive voltage is produced by the amplifier A1 causing the meter to give a positive reading rather than a zero reading as it should when the zeroizing loop is operative.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/532,797 US3935532A (en) | 1974-12-16 | 1974-12-16 | Automatic zeroing electrometer |
US05/532,785 US3935531A (en) | 1974-12-16 | 1974-12-16 | Electrometer with low voltage indicator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1526059A true GB1526059A (en) | 1978-09-27 |
Family
ID=27063950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4859675A Expired GB1526059A (en) | 1974-12-16 | 1975-11-26 | Electrometer |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB1526059A (en) |
NL (1) | NL7514349A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996037786A1 (en) * | 1995-05-26 | 1996-11-28 | Tr-Tech Int. Oy | A measuring system and a method for detecting static electricity and/or change thereof in a measuring object and use thereof |
-
1975
- 1975-11-26 GB GB4859675A patent/GB1526059A/en not_active Expired
- 1975-12-09 NL NL7514349A patent/NL7514349A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996037786A1 (en) * | 1995-05-26 | 1996-11-28 | Tr-Tech Int. Oy | A measuring system and a method for detecting static electricity and/or change thereof in a measuring object and use thereof |
Also Published As
Publication number | Publication date |
---|---|
NL7514349A (en) | 1976-02-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |