GB1073189A - Improvements in and relating to electrical measuring and like instruments - Google Patents

Improvements in and relating to electrical measuring and like instruments

Info

Publication number
GB1073189A
GB1073189A GB5016063A GB5016063A GB1073189A GB 1073189 A GB1073189 A GB 1073189A GB 5016063 A GB5016063 A GB 5016063A GB 5016063 A GB5016063 A GB 5016063A GB 1073189 A GB1073189 A GB 1073189A
Authority
GB
United Kingdom
Prior art keywords
resistance
voltage
amplifier
current
sensitivity
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
Application number
GB5016063A
Inventor
Bruce Holmes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ELECTRONIC INSTRUMENTS Ltd
Original Assignee
ELECTRONIC INSTRUMENTS Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ELECTRONIC INSTRUMENTS Ltd filed Critical ELECTRONIC INSTRUMENTS Ltd
Priority to GB5016063A priority Critical patent/GB1073189A/en
Publication of GB1073189A publication Critical patent/GB1073189A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters

Abstract

1,073,189. Measuring variation of resistance with voltage. ELECTRONIC INSTRUMENTS Ltd. March 18, 1965 [Dec. 19, 1963], No.50160/63. Heading G1U. A resistance measuring apparatus arranged to determine the variation of high resistance with applied voltage, and wherein a voltage source is connected by way of the resistance to a current sensitive device, comprises a common control which is arranged to vary both the voltage applied from the source to the resistance and the current sensitivity of the device, so that the response of the device to a given value of resistance remains constant. In one arrangement, the voltage applied to the resistance to be measured 6 is derived from a potentiometer 11 connected across a stabilized supply 10. The current through the resistance is applied to a high input impedance electrometer type D.C. amplifier 12, whose output is supplied to an indicating instrument 3. The output circuit also includes a variable resistor 13 which is included in a negative feedback path for the amplifier, so that the amplifier sensitivity may be varied. The wipers of the potentiometer 11 and resistor 13 are ganged together so that the applied voltage and the current sensitivity of the amplifier 12 will be varied inversely together. An alternative arrangement using a switched rather than a continuously variable control is described, Fig.3 (not shown).
GB5016063A 1963-12-19 1963-12-19 Improvements in and relating to electrical measuring and like instruments Expired GB1073189A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5016063A GB1073189A (en) 1963-12-19 1963-12-19 Improvements in and relating to electrical measuring and like instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5016063A GB1073189A (en) 1963-12-19 1963-12-19 Improvements in and relating to electrical measuring and like instruments

Publications (1)

Publication Number Publication Date
GB1073189A true GB1073189A (en) 1967-06-21

Family

ID=10454884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5016063A Expired GB1073189A (en) 1963-12-19 1963-12-19 Improvements in and relating to electrical measuring and like instruments

Country Status (1)

Country Link
GB (1) GB1073189A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944783A (en) * 1972-09-01 1974-04-27
JPS4944784A (en) * 1972-09-01 1974-04-27
GB2138576A (en) * 1982-12-10 1984-10-24 Trolex Prod Ltd Impedance sensor
EP2778694A2 (en) * 2013-03-14 2014-09-17 Fluke Corporation Apparatus and method for insulation testing of an electrical supply network
JP2016020842A (en) * 2014-07-14 2016-02-04 株式会社ヒューモラボラトリー Insulation resistance measuring device of capacitor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944783A (en) * 1972-09-01 1974-04-27
JPS4944784A (en) * 1972-09-01 1974-04-27
GB2138576A (en) * 1982-12-10 1984-10-24 Trolex Prod Ltd Impedance sensor
EP2778694A2 (en) * 2013-03-14 2014-09-17 Fluke Corporation Apparatus and method for insulation testing of an electrical supply network
EP2778694A3 (en) * 2013-03-14 2014-12-24 Fluke Corporation Apparatus and method for insulation testing of an electrical supply network
US10031174B2 (en) 2013-03-14 2018-07-24 Fluke Deutschland Gmbh Apparatus and method for insulation testing of an electrical supply network
JP2016020842A (en) * 2014-07-14 2016-02-04 株式会社ヒューモラボラトリー Insulation resistance measuring device of capacitor

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