Measuring apparatus and method for detecting moisture at a measurement voltage input of the measuring apparatus
First Claim
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1. A measuring apparatus comprising:
- a measurement voltage input comprising at least one input contact for an input voltage of a measuring element;
an impedance converter, wherein a high-resistance input of said impedance converter is connected to said at least one input contact of said measurement voltage input, said impedance converter emitting a measurement signal;
a supplemental contact; and
a supplemental voltage source, which delivers at least one supplemental voltage and which is connected with said supplemental contact forming a supplemental grid, said supplemental grid being not conductively connected with the at least one input contact of the measurement voltage input, without presence of moisture, wherein;
said supplemental contact is arranged in the region of said at least one input contact.
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Abstract
A measuring apparatus having a measurement voltage input with at least one input contact for an input voltage of a measuring element and a method for detecting moisture on the measurement voltage input of such a measuring apparatus are provided, wherein the measuring apparatus includes a supplemental voltage source, which delivers at least one supplemental voltage and is connected with a supplemental contact arranged in the region of the at least one input contact.
13 Citations
19 Claims
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1. A measuring apparatus comprising:
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a measurement voltage input comprising at least one input contact for an input voltage of a measuring element; an impedance converter, wherein a high-resistance input of said impedance converter is connected to said at least one input contact of said measurement voltage input, said impedance converter emitting a measurement signal; a supplemental contact; and a supplemental voltage source, which delivers at least one supplemental voltage and which is connected with said supplemental contact forming a supplemental grid, said supplemental grid being not conductively connected with the at least one input contact of the measurement voltage input, without presence of moisture, wherein; said supplemental contact is arranged in the region of said at least one input contact. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting moisture on a measurement voltage input of a measuring apparatus comprising at least one input contact for an input voltage of a measuring element, comprising the steps of:
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applying an input voltage of said measuring instrument to said at least one input contact, which is connected to a high-resistance input of an impedance converter, said impedance converter emitting a measurement signal; producing at least one supplemental voltage by use of a supplemental voltage source and a supplemental contact connected with the supplemental voltage source and arranged in the region of the at least one input contact; and said supplemental voltage being applied to the supplemental contact, so that, in the case of occurrence of moisture in the region of the at least one input contact, a shunt connection is produced between the at least one input contact and the supplemental contact, so that a size of the input voltage is drawn in the direction of a size of the at least one supplemental voltage. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A measuring apparatus, comprising:
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a measuring element with large internal resistance, a measurement voltage input comprising at least one input contact for an input voltage of said measuring element connected to said voltage input; a unit for measurement signal processing comprising an impedance converter, wherein a high-resistance input of said impedance converter is connected to said at least one input contact of said measurement voltage input, said impedance converter providing a measurement signal; a supplemental contact, which is arranged in the region of said at least one input contact; and a supplemental voltage source, which delivers at least one supplemental voltage and is connected with said supplemental contact. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification