DE806977C - Device for measuring high resistances, especially of organic substances for determining the water content with alternating current - Google Patents

Device for measuring high resistances, especially of organic substances for determining the water content with alternating current

Info

Publication number
DE806977C
DE806977C DEP10024A DEP0010024A DE806977C DE 806977 C DE806977 C DE 806977C DE P10024 A DEP10024 A DE P10024A DE P0010024 A DEP0010024 A DE P0010024A DE 806977 C DE806977 C DE 806977C
Authority
DE
Germany
Prior art keywords
alternating current
organic substances
determining
water content
high resistances
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
DEP10024A
Other languages
German (de)
Inventor
Dr-Ing Karl Heinz Winterling
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.)
KARL HEINZ WINTERLING DR ING
Original Assignee
KARL HEINZ WINTERLING DR ING
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 KARL HEINZ WINTERLING DR ING filed Critical KARL HEINZ WINTERLING DR ING
Priority to DEP10024A priority Critical patent/DE806977C/en
Application granted granted Critical
Publication of DE806977C publication Critical patent/DE806977C/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

Description

Infolge der im allgemeinen quadratischen Anzeige der gebräuchlichen Wechselstrommesser bei kleinen Stromstärken ließen sich hohe Widerstände mit Wechselstrom bisher nur, z. B. in der Wechselstrombrücke, mit beträchtlichem Aufwand messen. As a result of the generally square display of the usual Alternating current meters with small currents, high resistances can be achieved with alternating current so far only, z. B. in the AC bridge, measure with considerable effort.

Für-iele technische Zwecke, z. B. den der Wasserbestimmung in organischen Substanzen, ist jedoch ein einfaches Aleßverfahren zur Bestimmung hoher Widerstände mit Wechselstrom richtig, da die Messung mit Gleichstrom zu Fehlern infolge von Polarisationserscheinungen führt. For many technical purposes, e.g. B. that of water determination in organic Substances, however, is a simple measuring method for determining high resistances correct with alternating current, since measurement with direct current leads to errors due to Leads to polarization phenomena.

Bei der v orliegenden Erfindung vird die zur Messung hoher Gleichstrom viderstände übliche Schaltung des Gleichstromverstärkers in der Weise al) geändert, daß der Spannungsabfall am Gitter--iderstand einer Röhre, in deren Gitterkreis das Meßobjekt liegt, den Anodenstrom einer Röhre steuert, deren Anodenspannung Wechselspannung der gleichen Frequenz ist. Ein Ausführungsbeispiel ist in Abb. 1 dargestellt, obei an der l'robe R, und der Anode der WIeßröhre eine gegenphasige Aleßspannung der gleichen Frequenz liegt. In the present invention, the high DC current measurement is used Resistors usual circuit of the DC amplifier changed in the way al), that the voltage drop across the grid - resistance of a tube in whose grid circle the The object to be measured controls the anode current of a tube, the anode voltage of which is AC voltage is the same frequency. An embodiment is shown in Fig. 1, obei at the robe R, and the anode of the white tube, an antiphase ale voltage of the same frequency.

.-\m Gitter der AIeßspannung liegt dann eine Teilspannung der AIeßspannung, die nur in der Halbperidoe, in der die Anodenspannung positiv ist, den Anodenstrom beeinflußt. Hierdurch ergibt sich eine Abhängigkeit des Anodenstroms vom Leitwert des zu messenden Widerstands, der die Messung sehr hoher Widerstände ermöglicht. .- \ m the grid of the measuring stress then lies a partial stress of the measuring stress, which only in the half-peridea, in which the anode voltage is positive, the anode current influenced. This results in a dependency of the anode current on the conductance of the resistance to be measured, which enables the measurement of very high resistances.

Zur Messung on Widerständen mit hoher Blindkomponente kann die Schaltung angewandt werden, indem durch Anwendeung eines Phasenschiebers auf der. Anodenspannungsseite der Anodenstrom auf einen Alinimal vert eingestellt vird (-gl. abb. 2). To measure resistances with a high reactive component, the circuit can be applied by applying a phase shifter on the. Anode voltage side the anode current is set to an alinimal vert (- see Fig. 2).

Aus der Größe des Anodellstroms ergibt sich der Bertrag, aus der Einstellung des Phasenschiebers der Phasenrvinkel des zu messenden Blind viderstandes.The transfer results from the size of the anodel current, from the setting of the phase shifter the phase angle of the reactive resistance to be measured.

Gemäß einer Ausgestaltung des Erfindungsgedankens kann das Meß-resultat an cinem Galvanometer, z. B. einem Lichtmarkengal anometer, mit aus echselbarer Skala abgelesen verdell. Die Skalen können je nach dem Meßobjekt. z. B. Weizen, roggen, Mehl, Ölfrüchten, geeicht werden. According to one embodiment of the inventive concept, the measurement result on a galvanometer, e.g. B. a light mark gal anometer, with from changeable Read off the scale. The scales can vary depending on the object to be measured. z. B. Wheat, rye, flour, oil fruits, to be calibrated.

PATENTANSPR @@ : V Vorrichtung zur Messung von hohen Widerständen mit Hilfe von W echselstrom, insbesondere von organischen Substanzen zum Z-ecke der Feuchtigkeitsbestimmung, dadurch gekennzeichnet, daß der Spannungsal) fall am Gitter viderstand einer Röhre, in deren Gitterkreis das SIeßobjekt liegt, den Anodenstrom der Röhre steuert, deren Anodenspannung Wechselspannung der gleichen Frequenz ist. PATENTANSPR @@: V Device for measuring high resistances with the help of alternating current, especially of organic substances to the point the moisture determination, characterized in that the voltage fall on Lattice resistance of a tube in whose lattice circle the object lies, the anode current of the tube whose anode voltage is AC voltage of the same frequency.

Claims (1)

2. Vorrichtung nach Anspruch I, dadurch gekennzeichnet, daß durch Einbau eines Phasenschiebers auf der Anodenspannungsseite Widerstände mit Blindkomponente nach Größe und Phasen vinkel meßbar sind. 2. Apparatus according to claim I, characterized in that by Installation of a phase shifter on the anode voltage side, resistors with reactive components angles can be measured according to size and phase. 3. V orrichtung nach Anspruch I und 2, dadurch gekennzeichnet, daß das N1 eßresultat mit Hilfe eines Galvanometers. z. B. eines Lichtmarkengalvanometers, an aus vechselbaren Skalen, die auf die Meßsubstanzen. z. B. 3. V device according to claim I and 2, characterized in that the N1 test result with the aid of a galvanometer. z. B. a light mark galvanometer, of interchangeable scales that point to the substances to be measured. z. B. Weizen, Roggen, Alehl, C) lfrüchte, geeicllt sind, unmittell) ar abgelesen werden kann. Wheat, rye, Alehl, C) oil fruits, calibrated, directly ar can be read.
DEP10024A 1948-10-02 1948-10-02 Device for measuring high resistances, especially of organic substances for determining the water content with alternating current Expired DE806977C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP10024A DE806977C (en) 1948-10-02 1948-10-02 Device for measuring high resistances, especially of organic substances for determining the water content with alternating current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP10024A DE806977C (en) 1948-10-02 1948-10-02 Device for measuring high resistances, especially of organic substances for determining the water content with alternating current

Publications (1)

Publication Number Publication Date
DE806977C true DE806977C (en) 1951-06-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEP10024A Expired DE806977C (en) 1948-10-02 1948-10-02 Device for measuring high resistances, especially of organic substances for determining the water content with alternating current

Country Status (1)

Country Link
DE (1) DE806977C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884594A (en) * 1954-12-09 1959-04-28 Cutler Hammer Inc Instruments for measuring electrical resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884594A (en) * 1954-12-09 1959-04-28 Cutler Hammer Inc Instruments for measuring electrical resistance

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