ZA91506B - Measurement coupling for low capacitances - Google Patents

Measurement coupling for low capacitances

Info

Publication number
ZA91506B
ZA91506B ZA91506A ZA91506A ZA91506B ZA 91506 B ZA91506 B ZA 91506B ZA 91506 A ZA91506 A ZA 91506A ZA 91506 A ZA91506 A ZA 91506A ZA 91506 B ZA91506 B ZA 91506B
Authority
ZA
South Africa
Prior art keywords
measurement coupling
low capacitances
capacitances
low
coupling
Prior art date
Application number
ZA91506A
Other languages
English (en)
Inventor
Jorma Ponkala
Ponkala Jorma
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 ZA91506B publication Critical patent/ZA91506B/xx

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)
ZA91506A 1990-02-07 1991-01-23 Measurement coupling for low capacitances ZA91506B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI900592A FI84666C (fi) 1990-02-07 1990-02-07 Maetkoppling foer smao kapasitanser.

Publications (1)

Publication Number Publication Date
ZA91506B true ZA91506B (en) 1991-10-30

Family

ID=8529843

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA91506A ZA91506B (en) 1990-02-07 1991-01-23 Measurement coupling for low capacitances

Country Status (9)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513022C1 (de) * 1995-04-06 1996-08-14 Siemens Ag Schaltungsanordnung und Verfahren zur Bestimmung von Kapazitätsdifferenzen
DE19625666C1 (de) * 1996-06-26 1998-01-15 Siemens Ag Ausleseschaftung und kapazitiv messender Senser
DE102004006020A1 (de) 2004-02-06 2005-08-25 E + E Elektronik Ges.M.B.H. Schaltungsanordnung zur kapazitiven Feuchtemessung und Verfahren zum Betrieb derselben
US8030949B2 (en) * 2008-10-31 2011-10-04 Testo Ag Measurement method for determining moisture content
CN101738422B (zh) * 2009-12-23 2012-09-05 北京宝力马传感技术有限公司 一种湿度测量装置及方法

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
IT1245137B (it) 1994-09-13
CA2035909A1 (en) 1991-08-08
ITMI910300A0 (it) 1991-02-06
DE4103433A1 (de) 1991-08-08
BR9100486A (pt) 1991-10-29
FI84666C (fi) 1991-12-27
AU6949191A (en) 1991-08-08
FI900592A0 (fi) 1990-02-07
GB2242279A (en) 1991-09-25
FR2657963A1 (fr) 1991-08-09
FI900592A (fi) 1991-08-08
GB9101869D0 (en) 1991-03-13
FI84666B (fi) 1991-09-13
ITMI910300A1 (it) 1992-08-06

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