AU6949191A - Measurement coupling for low capacitances - Google Patents

Measurement coupling for low capacitances

Info

Publication number
AU6949191A
AU6949191A AU69491/91A AU6949191A AU6949191A AU 6949191 A AU6949191 A AU 6949191A AU 69491/91 A AU69491/91 A AU 69491/91A AU 6949191 A AU6949191 A AU 6949191A AU 6949191 A AU6949191 A AU 6949191A
Authority
AU
Australia
Prior art keywords
measurement coupling
low capacitances
capacitances
low
coupling
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.)
Abandoned
Application number
AU69491/91A
Inventor
Jorma Ponkala
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.)
Vaisala Oy
Original Assignee
Vaisala Oy
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 Vaisala Oy filed Critical Vaisala Oy
Publication of AU6949191A publication Critical patent/AU6949191A/en
Abandoned 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
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
AU69491/91A 1990-02-07 1991-01-21 Measurement coupling for low capacitances Abandoned AU6949191A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI900592 1990-02-07
FI900592A FI84666C (en) 1990-02-07 1990-02-07 MAETKOPPLING FOER SMAO KAPASITANSER.

Publications (1)

Publication Number Publication Date
AU6949191A true AU6949191A (en) 1991-08-08

Family

ID=8529843

Family Applications (1)

Application Number Title Priority Date Filing Date
AU69491/91A Abandoned AU6949191A (en) 1990-02-07 1991-01-21 Measurement coupling for low capacitances

Country Status (9)

Country Link
AU (1) AU6949191A (en)
BR (1) BR9100486A (en)
CA (1) CA2035909A1 (en)
DE (1) DE4103433A1 (en)
FI (1) FI84666C (en)
FR (1) FR2657963A1 (en)
GB (1) GB2242279A (en)
IT (1) IT1245137B (en)
ZA (1) ZA91506B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513022C1 (en) * 1995-04-06 1996-08-14 Siemens Ag Differential capacitance measuring circuit for pressure sensor
DE19625666C1 (en) * 1996-06-26 1998-01-15 Siemens Ag Readout shaft and capacitive measuring sensor
DE102004006020A1 (en) 2004-02-06 2005-08-25 E + E Elektronik Ges.M.B.H. Circuit arrangement for capacitive humidity measurement and method for operating the same
US8030949B2 (en) * 2008-10-31 2011-10-04 Testo Ag Measurement method for determining moisture content
CN101738422B (en) * 2009-12-23 2012-09-05 北京宝力马传感技术有限公司 Humidity measuring device and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886447A (en) * 1972-05-17 1975-05-27 Iwatsu Electric Co Ltd Capacitance-voltage converter
GB2058364B (en) * 1979-09-01 1983-03-23 Ferranti Ltd Capacitance measuring apparatus
US4794320A (en) * 1987-08-10 1988-12-27 Moore Products Co. Multi-frequency capacitance sensor

Also Published As

Publication number Publication date
FI84666B (en) 1991-09-13
DE4103433A1 (en) 1991-08-08
GB9101869D0 (en) 1991-03-13
FI900592A0 (en) 1990-02-07
IT1245137B (en) 1994-09-13
BR9100486A (en) 1991-10-29
ITMI910300A1 (en) 1992-08-06
ITMI910300A0 (en) 1991-02-06
GB2242279A (en) 1991-09-25
FI900592A (en) 1991-08-08
FI84666C (en) 1991-12-27
CA2035909A1 (en) 1991-08-08
FR2657963A1 (en) 1991-08-09
ZA91506B (en) 1991-10-30

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